Rinnai M-Series Condensing Boiler Combi Manual
Central Heang and Domesc Hot Water
INSTALLATION AND OPERATION MANUAL
M-Series Condensing Boiler
Wall-Mounted, Gas-Fired Combi Boiler
Cered to ANSI Z21.13
and CSA 4.9
READ AND SAVE THIS MANUAL
If the informaon in these instrucons are not followed exactly, a re or
explosion may result causing property damage, personal injury, or loss of
life.
• Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any
other appliance.
• WHAT TO DO IF YOU SMELL GAS
− Do not try to light any appliance.
− Do not touch any electrical switch; do not use any phone in your building.
− Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s
instrucons.
− If you cannot reach your gas supplier, call the re department.
• Installaon and service must be performed by a qualied installer, service agency or the gas
supplier.
WARNING
MODELS
M060C
M090C
M120C
M160C
2 Rinnai M-Series Condensing Boiler Combi Manual
1. Welcome ........................................................................................................................... 4
2. Safety ................................................................................................................................ 5
2.1 Safety Symbols ........................................................................................................................... 5
2.2 Safety Precauons ...................................................................................................................... 5
3. About the Boiler ................................................................................................................ 7
3.1 Front View .................................................................................................................................. 7
3.2 Boom View ............................................................................................................................... 8
3.3 Components ............................................................................................................................... 9
3.4 Specicaons ............................................................................................................................ 10
3.5 Dimensions ............................................................................................................................... 11
3.6 Accessories ............................................................................................................................... 13
3.7 How to Remove the Front Panel .............................................................................................. 14
4. Installaon ...................................................................................................................... 15
4.1 Installaon Guidelines .............................................................................................................. 15
4.2 What You’ll Need ...................................................................................................................... 16
4.3 Items Included .......................................................................................................................... 17
4.4 Choose an Installaon Locaon ............................................................................................... 18
4.5 Mount the Boiler to the Wall ................................................................................................... 20
5. Venng ........................................................................................................................... 21
5.1 Guidelines ................................................................................................................................. 21
5.2 Venng Installaon Sequence .................................................................................................. 22
5.3 Terminaon Consideraons ..................................................................................................... 22
5.4 Venng Opons ........................................................................................................................ 23
6. Gas Supply ...................................................................................................................... 43
6.1 Connect the Gas Supply............................................................................................................ 43
6.2 Gas Operang Instrucons ....................................................................................................... 45
6.3 Gas Pipe Sizing Reference Tables ............................................................................................. 46
7. DHW System Piping ......................................................................................................... 48
7.1 Guidelines ................................................................................................................................. 48
7.2 Instrucons ............................................................................................................................... 48
7.3 Piping Diagram for a Basic DHW Installaon............................................................................ 49
8. CH System Piping ............................................................................................................. 50
8.1 Guidelines ................................................................................................................................. 50
8.2 Instrucons ............................................................................................................................... 50
8.3 Common CH Components ........................................................................................................ 51
8.4 Piping Diagram for a Basic CH System (With Hydraulic Separaon) ........................................ 53
8.5 Hydraulic Separaon ................................................................................................................ 54
8.6 Connect the Pressure Relief Valves (DHW and CH).................................................................. 55
Rinnai M-Series Condensing Boiler Combi Manual 3
8.7 Connect the Condensate Drain Line ......................................................................................... 56
9. Power Supply .................................................................................................................. 58
9.1 Guidelines ................................................................................................................................. 58
9.2 Electrical Connecons .............................................................................................................. 59
9.3 Post-Power Supply Connecon Checklist ................................................................................. 59
10. Commissioning .............................................................................................................. 60
10.1 Safety Precauons .................................................................................................................. 60
10.2 Instrucons ............................................................................................................................. 60
10.3 Air Purge Process .................................................................................................................... 63
11. Post-Installaon Checklist ............................................................................................. 64
12. Operaon ...................................................................................................................... 66
12.1 Start-Up Informaon .............................................................................................................. 66
12.2 Control Panel .......................................................................................................................... 67
12.3 Basic Operaon Sengs ......................................................................................................... 70
12.4 Parameter Sengs ................................................................................................................. 75
12.5 Outdoor Reset Control ........................................................................................................... 80
12.6 Diagnosc Codes .................................................................................................................... 86
12.7 Forced Hi/Low Fire Modes ..................................................................................................... 87
12.8 Freeze Protecon ................................................................................................................... 88
13. Maintenance ................................................................................................................. 89
13.1 Owner Maintenance ............................................................................................................... 89
13.2 Licensed Professional Maintenance ....................................................................................... 90
13.3 Test the Ignion Safety Shut O Device ................................................................................. 92
14. Appendices .................................................................................................................... 93
14.1 Approved Cleaners, Inhibitors and Anfreezes ..................................................................... 93
14.2 Flush the CH Plumbing System .............................................................................................. 94
14.3 Boiler Parts ............................................................................................................................ 95
14.4 System Applicaon Examples .............................................................................................. 103
14.5 Gas Conversion ..................................................................................................................... 109
14.6 Wiring Diagram ..................................................................................................................... 113
14.7 Ladder Diagram .................................................................................................................... 114
14.8 CH Pressure Drop and Flow Curve ....................................................................................... 115
14.9 DHW Pressure Drop and Flow Curve ................................................................................... 116
14.10 Resistance/Temperature Table for Sensors ....................................................................... 117
14.11 Remove a Boiler from a Common Vent System ................................................................. 118
14.12 Massachuses State Gas Regulaons ................................................................................ 119
14.13 Warranty ............................................................................................................................ 120
4 Rinnai M-Series Condensing Boiler Combi Manual
Thank you for purchasing a Rinnai Condensing
Boiler. Before installing and operang this
boiler, be sure to read these instrucons
completely and carefully to familiarize
yourself with the boiler’s features and
funconality.
• You must read the enre manual to
properly operate the boiler.
• Keep this manual for future reference.
• As when using any appliance generang
heat, there are certain safety precauons
you should follow. See secon “2.2 Safety
Precauons” for detailed safety
precauons.
• Be sure your boiler is installed by a
licensed installer.
• If installing in the state of Massachuses,
read secon “14.12 Massachuses State
Gas Regulaons” in this manual.
ANSI
American Naonal Standards
Instute
Btu Brish Thermal Unit
CH Central Heang
DHW Domesc Hot Water
GPM Gallons per minute
LP Liquid Propane
LWCO Low Water Cut O
NG Natural Gas
PP Polypropylene
PRV Pressure Relief Valve
PSI Pounds per square inch
W.C. Inches water column
For Your Records
Dealer Name:
Located on le
side of unit
1
• A trained and qualied professional
must install the boiler, inspect it, and
leak test it before use. The warranty
will be voided due to any improper
installaon.
• The trained and qualied professional
should have skills such as:
− Gas line sizing
− Connecng gas lines, water lines,
valves, and electricity
− Knowledge of applicable naonal,
state, and local codes
− Installing venng through a wall
or roof
− Training in installaon of
condensing boilers. Training on
Rinnai M-Series Condensing
Boilers is accessible at
www.trainingevents.rinnai.us.
• Read all instrucons in this manual
before installing the boiler. The boiler
must be installed according to the
exact instrucons in this manual.
• Proper installaon is the responsibility
of the installer.
• When installaon is complete, leave
this manual with the boiler or give the
manual directly to the consumer.
Following is a list of common acronyms and
abbreviaons used in this manual:
Dealer Phone:
Purchase Date:
Serial #:
Rinnai M-Series Condensing Boiler Combi Manual 5
Indicates an imminently hazardous
situaon which, if not avoided, will
result in personal injury or death.
Indicates a potenally hazardous
situaon which, if not avoided, could
result in personal injury or death.
Indicates a potenally hazardous situaon
which, if not avoided, could result in minor
or moderate injury. It may also be used to
alert against unsafe pracces.
DANGER
WARNING
This manual contains the following important
safety symbols. Always read and obey all
safety messages.
The following precauons apply to the
installer and consumer. Read and follow all
instrucons in this secon.
• Before operang, smell all around the
appliance area for gas. Be sure to smell
next to the oor because some gas is
heavier than air and will sele on the
oor.
• Keep the area around the appliance
clear and free from combusble
materials, gasoline, and other
ammable vapors and liquids.
• Do not store or use gasoline or other
ammable vapors and liquids in the
vicinity of this or any other appliance.
• Combusble construcon refers to
adjacent walls and ceiling and should
not be confused with combusble or
ammable products and materials.
Combusble and/or ammable
products and materials should never be
stored in the vicinity of this or any gas
appliance.
• Always check the water temperature
before entering a shower or bath.
2
• If the informaon in these instrucons
is not followed exactly, a re or
explosion may result causing property
damage, personal injury, or death.
• Do not store or use gasoline or other
ammable vapors and liquids in the
vicinity of this or any other appliance.
• WHAT TO DO IF YOU SMELL GAS:
− Do not try to light any appliance.
− Do not touch any electrical
switch; do not use any phone in
your building.
− Immediately call your gas
supplier from a neighbor’s
phone. Follow the gas supplier’s
instrucons.
− If you cannot reach your gas
supplier, call the re department.
• Installaon and service must be
performed by a qualied installer,
service agency or the gas supplier.
• The warning signs in this manual are
here to prevent injury to you and
others. Please follow them explicitly.
Safety alert symbol. Alerts you
to potenal hazards that can
kill or hurt you and others.
WARNING
CAUTION
6 Rinnai M-Series Condensing Boiler Combi Manual
WARNING
This product can expose you to
chemicals including Nickel compounds,
Lead and Lead compounds which are
known to the State of California to
cause cancer, birth defects or other
reproducve harm. For more
informaon, visit
www.P65Warnings.ca.gov.
• Flammable liquids such as cleaning
solvents, aerosols, paint thinners,
adhesives, gasoline and propane must be
handled and stored with extreme care.
These ammable liquids emit ammable
vapors and when exposed to an ignion
source can result in a re hazard or
explosion. Flammable liquids should not be
used or stored in the vicinity of this or any
other gas appliance.
• DO NOT operate the boiler without the
front panel installed. The front panel
should only be removed for service/
maintenance or replacing internal
components.
• BURN HAZARD. Hot exhaust and vent may
cause serious burns. Keep away from the
boiler. Keep small children and animals
away from the boiler.
• Heang supply, return and domesc hot
water outlet pipes leaving the boiler can be
hot to touch.
• Install the vent system per local and
naonal codes.
• Do not install this boiler above 10,200
(3,109 m).
• Do not obstruct combuson air to the
boiler.
• Rinnai recommends that every home have
a carbon monoxide (CO) alarm in the
hallway near bedrooms in each sleeping
area. Check baeries monthly and replace
them annually.
• California law requires the following
Proposion 65 warning to be provided:
• Do not use this appliance if any part has
been under water. Immediately call a
licensed professional to inspect the
appliance and replace any part of the
control system and any manual gas control
valve which has been under water.
• Do not use substute materials. Use only
parts cered for the appliance.
• Should overheang occur or the gas
supply fail to shut o, turn o the manual
gas control valve to the appliance.
• It is strongly recommended that you use a
trained and qualied professional who has
aended a Rinnai installaon training class
to adjust parameter sengs.
• Do not use an extension cord or adapter
plug with this appliance.
• Any alteraon to the appliance or its
controls can be dangerous and will void
the warranty.
• To protect yourself from harm, before
performing maintenance:
− Turn o the electrical power supply by
unplugging the power cord or by
turning o the electricity at the circuit
breaker. (The boiler controller does
not control the electrical power.)
− Turn o the gas at the gas control,
usually located immediately below the
boiler.
− Turn o the incoming water supply.
This can be done at the isolaon valve
immediately below the boiler for the
domesc hot water. Turning o the
water for the central heang system is
done at the boiler system lling staon
shut-o valve or the main water
supply to the building.
− Use only your hand to turn the manual
gas control valve. Never use tools. If
the manual gas control valve will not
turn by hand, do not try to repair it;
call a trained and qualied
professional. Force or aempted
repair may result in a re or explosion.
• Proper venng is required for the safe
operaon of this appliance. Failure to
properly vent this appliance can result in
death, personal injury and/or property
damage.
Rinnai M-Series Condensing Boiler Combi Manual 7
The M-Series Condensing Boiler is a wall-mounted, gas-red boiler designed to providing heang
and domesc hot water.
For complete boiler informaon, refer to the “Rinnai M-Series Condensing Boiler Installaon
Manual” supplied with the boiler, or visit rinnai.us.
Topics in this secon
• Front View
• Boom View
• Components
• Specicaons
• Dimensions
• Accessories
• How To Remove the Front Panel
3
Controller
(front cover
removed)
Vent Connecons
Piping Connecons (visible
below boiler)
8 Rinnai M-Series Condensing Boiler Combi Manual
DHW
Cold Inlet
Gas
DHW
Hot Outlet
Central
Heang
Supply
Central
Heang
Return
Supply to CH System
Return from CH System
Primary-Secondary Heang Kit
CH Pressure Relief Valve (supplied
with boiler)
CH Supply
Condensate Drain
Domesc Hot Water
Domesc Cold Water
Gas
CH Return
Domesc Hot Water Pressure Relief Valve
Central Heang Temperature Pressure
Gauge (supplied with boiler)
Gas Shut O Valve
All items are eld-supplied unless otherwise noted.
Rinnai M-Series Condensing Boiler Combi Manual 9
❶
❷
❸
❹
❺
❻
❼
Located
behind
#6 (Silencer)
❽
❾
❿
⓫
⓬
⓮
⓭
1 iCon Heat Exchanger
2 Burner Hood with Burner Cassee
3 Fan with Integrated Venturi
4 Gas Valve
5 Ignion Unit
6 Silencer
7 Condensate Tray
8
Flue Gas Exhaust/Air Intake with
Measuring Points
9 Automac De-aerator
10 Control Panel
11 Pressure Sensor
12 Modulang Pump
13 Plate Heat Exchanger
14 Diverter Valve
15 Flow Sensor
16 Condensate Trap
⓯
⓰
Located behind
#6 (Silencer)
Exhaust
Intake
10 Rinnai M-Series Condensing Boiler Combi Manual
1
Minimum ow may vary slightly depending on the temperature seng and the inlet water
temperature. Minimum acvaon ow is 0.4 GPM (1.5 L/min).
2
The maximum gas supply pressure must not exceed the value specied by the manufacturer.
Rinnai products are connually being updated and improved; therefore, specicaons are subject
to change without prior noce.
Model M060C M090C M120C M160C
Dimensions - w, h, d 17 in. x 28 in. x 10 in. (439 mm x 699 mm x 264 mm)
Weight 77 lb (35 kg) 83.6 lb (38 kg)
Appliance Type Wall-Mounted, Gas-Fired Combi Boiler
Installaon Type Indoor
Ignion System Direct Electronic Ignion
Heat Exchanger Type iCon1 iCon2
Heat Exchanger Surface Area 7.3 sq 11.8 sq
Gas
Consumpon
(Btu/h)
Minimum
NG: 17,000
LP: 31,500
NG: 23,500
LP: 73,500
Maximum (Central
Heang)
60,000 90,000 120,000 160,000
Maximum (DHW) 103,000 160,000
Temperature
Seng
Central Heang
(Min - Max)
68° F - 185° F (20° C - 85° C)
DHW (Min - Max)
104° F - 149° F (40° C - 65° C)
Water
Content
Central Heang
1 Gallon
3.8 Liters
1.4
Gallons
5.2 Liters
1.4
Gallons
5.2 Li-
ters
1.4
Gallons
5.2 Liters
DHW
.05 Gallons
.2 Liters
.08
Gallons
.3 Liters
.08
Gallons
.3 Liters
.08
Gallons
.3 Liters
Water Supply
Pressure
Central Heang
Minimum: 19 PSI Maximum: 45 PSI
DHW
150 PSI (maximum)
Pressure Relief Valve
30 PSI
Pump Model Grundfos UPER 15-78
Sound Level 46 dB 54 dB
Electrical
Data
Normal Central
Heang
155 W 177 W 164 W 191 W
DHW 185 W 191 W 191 W 191 W
Standby 3.5 W
Max Current 1.97 Amps (maximum)
Fuse 5 Amps
Gas
Supply
Pressure
Natural Gas 3.0 in. - 10.5 in. W.C.
Propane 8.0 in. - 13.5 in. W.C.
Electric Connecons AC 120 Volts, 60Hz.
Energy Star Qualied Recognized as the Most Ecient of ENERGY STAR®
Cercaons ANSI Z21.13, CSA 4.9
Rinnai M-Series Condensing Boiler Combi Manual 11
Measurements: in. (mm)
Vent Top Connecons 3 in. (80 mm) PP, 3 in. PVC, 3/5 in. Concentric, 2 in. (60 mm) PP, 2 in. PVC
12 Rinnai M-Series Condensing Boiler Combi Manual
Connecon
Connecon Size with Provided
Adapters
Gas 3/4 in. NPT
DWH In (Cold Inlet) 3/4 in. NPT
DHW Out (Hot Outlet) 3/4 in. NPT
CH In (CH Return) 1 in. NPT
CH Out (CH Supply) 1 in. NPT
Gas
Central Heang
Return
Central Heang
Supply
Domesc Hot Water
Outlet
Gas
Central Heang
Return
Domesc Cold
Water Inlet
Rinnai M-Series Condensing Boiler Combi Manual 13
The following oponal accessories are available for the Rinnai M-Series Condensing Boiler.
CONDENSATE NEUTRALIZER
Neutralizes the condensate
generated by the boiler.
SCALECUTTER
Filters and reduces the amount of
scale entering the boiler allowing
for greater boiler longevity.
SCALECUTTER REFILL CARTRIDGE
Rell cartridge for the ScaleCuer
lter assembly.
DHW ISOLATION VALVE KIT
For quick isolaon of the
boiler DHW connecons.
BOILER TOOLKIT
PN: 809000024
Set of specic tools recommended
for boiler service.
PRIMARY SECONDARY HEATING KIT
PN: 803000023
14 Rinnai M-Series Condensing Boiler Combi Manual
Using a Philips head screwdriver, remove
the 2 screws from the top of the boiler.
You Will Need:
• Philips head screwdriver
2
3
1
Li the tab slightly above the peg.
To remove, carefully li the panel up
and o to release it from the boiler.
IMPORTANT
Do not operate the boiler without the front panel installed. The front panel should
only be removed for service/maintenance or replacing internal components.
TIP
Be careful not to lose the screws. You’ll need
them when reinstalling the front cover.
Rinnai M-Series Condensing Boiler Combi Manual 15
• Installaon Guidelines
• What You’ll Need
• Items Included
• Choose an Installaon Locaon
• Mount the Boiler to the Wall
THIS SECTION IS INTENDED
FOR THE INSTALLER
Installer qualicaons: A trained and qualied
professional must install the appliance,
inspect it, and leak test the boiler before use.
The warranty will be voided due to any
improper installaon. The trained and
qualied professional should have skills such
as: Gas sizing; Connecng gas lines, water
lines, valves, and electricity; Knowledge of
applicable naonal, state, and local codes;
Installing venng through a wall or roof; and
training in installaon of condensing boilers.
Training for Rinnai Condensing Boilers is
accessible online at
www.trainingevents.rinnai.us.
Topics in this secon
4
• This boiler is cered for installaon in
residenal and commercial applicaons.
• This boiler is suitable for combinaon
water heang and central heang.
• The installaon must conform with local
codes or, in the absence of local codes,
with the Naonal Fuel Gas Code, ANSI
Z223.1/NFPA 54, or the Natural Gas and
Propane Installaon Code, CSA B149.1. If
installed in a manufactured home, the
installaon must conform with the
Manufactured Home Construcon and
Safety Standard, Title 24 CFR, Part 3280
and/or CAN/SCA Z240 MH Series, Mobile
Homes.
• The appliance, when installed, must be
electrically grounded in accordance with
local codes or, in the absence of local codes,
with the Naonal Electrical Code, ANSI/
NFPA 70, or the Canadian Electrical Code,
CSA C22.1.
• The appliance and its main gas valve must
be disconnected from the gas supply piping
system during any pressure tesng of that
system at test pressures in excess of 1/2 psi
(3.5 kPa) (13.84 in W.C.). For system tesng
at pressures less than or equal to 1/2 psi
(3.5 kPa) (13.84 in W.C.) the appliance must
be isolated from the gas supply piping by
closing its individual manual shuto valve.
• You must follow the installaon instrucons
and those in secon “5. Venng” for
adequate combuson air and exhaust.
• If this boiler’s DHW system is connected to a
closed water supply system, such as one
having a backow preventer in the cold
water supply line, means shall be provided
to control thermal expansion. Contact the
water supplier or local plumbing inspector
on how to control thermal expansion.
• Should overheang occur or the gas supply
fail to shut o, turn o the manual gas
control valve to the appliance.
• Combuson air must be free of chemicals,
such as chlorine or bleach, that produce
fumes. These fumes can damage
components and reduce the life of your
appliance.
• Where required by the authority having
jurisdicon, the installaon must comply
with the Standard for Controls and Safety
Devices for Automacally Fired Boilers,
ANSI/ASME CSD-1.
16 Rinnai M-Series Condensing Boiler Combi Manual
DO NOT install the boiler in an area
where water leakage of the unit or
connecons will result in damage to
the area adjacent to the appliance
or to lower oors of the structure.
When such locaons cannot be
avoided, it is required that a
suitable drain pan, adequately
drained, be installed under the
boiler. The pan must not restrict
combuson air ow.
DO NOT install the boiler in an area
with negave air pressure.
DO NOT obstruct the ow of
combuson and venlaon air.
DO NOT use substute parts that
are not authorized for this boiler.
DO NOT install the boiler on
carpeng.
DO NOT
Gather the recommended tools and parts
before starng installaon.
Items Needed
• Pressure relief valve for domesc
hot water (150 PSI / 1,034 kPa)
• Low loss header or closely spaced
tee
• Expansion tank for a closed heang
system
• Isolaon valve kit or equivalent
components (for quick isolaon of
the boiler for service and/or
maintenance)
• CH System Air Separator
• Standard tools for central heang,
gas ng, plumbing and electrical
wiring.
• Combuson analyzer (intended for
use with condensing boilers)
• Digital manometer capable of
reading both posive and negave
pressure
• Digital mulmeter capable of
reading microamps
• pH digital meter or test strips
• For wall mounng bracket
installaon:
− Level
− Screws (use appropriate screws
for type of wall construcon)
Other Items You May Need
• Hand truck with fastening belt
• Boiler toolkit (oponal accessory for
boiler service. See secon “3.6
Accessories” for more informaon.)
• Ensure the wall is of sucient
strength to support the weight of the
boiler, piping and any other
components needed for installaon;
if it is not, please reinforce the wall as
appropriate.
• Operang limits of the boiler:
Maximum boiler set
point temperature:
185°F (85°C)
Maximum operang
pressure:
45 psi (3.1 bar)
Maximum allowable
working
temperature ASME:
210°F (99°C)
Maximum allowable
working pressure
ASME:
45 psi (3.1 bar)
Rinnai M-Series Condensing Boiler Combi Manual 17
Carefully unpack your boiler system and verify the following contents are included. If any items are
damaged or missing, contact your local dealer/distributor. Do not aempt to use any item that
appears damaged.
RINNAI CONDENSING BOILER
Pump
Integrated
Items
Refer to secon
“3.3 Components”
for a complete list of
integrated parts.
WALL MOUNTING
BRACKET
30 PSI PRESSURE
RELIEF VALVE
For Central
Heang Systems
OUTDOOR
TEMPERATURE SENSOR
DOCUMENTATION
• Installaon and Operaon
Manual (this manual)
• User Manual
• ISCL
• Conversion Manual
LIQUID PROPANE FIELD CONVERSION KIT
This boiler is congured for Natural Gas only. Use this kit to
convert to Propane Gas if needed. Contents include:
Vent top with integrated
3 in. PP (80 mm)
Connecons
CONVERSION
MANUAL
EEPROM KEY
CONVERSION
RATING
PLATE
LIQUID PROPANE
RESTRICTOR
VENT ADAPTERS
3/5 in. Concentric
2 in. PVC/PP
Reducer (QTY 2)
3 in. PVC
(QTY 2)
CENTRAL HEATING
TEMPERATURE
PRESSURE GAUGE
18 Rinnai M-Series Condensing Boiler Combi Manual
Contaminant Maximum Level
Total Hardness Up to 200 mg/L
Aluminum * Up to 0.2 mg/L
Chlorides * Up to 250 mg/L
Copper * Up to 1.0 mg/L
Dissolved Carbon Dioxide
(CO2)
Up to 15.0 mg/L
Iron * Up to 0.3 mg/L
Manganese * Up to 0.05 mg/L
pH * 6.5 to 8.5
TDS (Total Dissolved Solids)* Up to 500 mg/L
Zinc * Up to 5 mg/L
Consideraon of care for your boiler should
include evaluaon of water quality.
• The water must be potable, free of
corrosive chemicals, sand, dirt, or other
contaminants.
• It is up to the installer to ensure the
water does not contain corrosive
chemicals or elements that can aect or
damage the boiler.
• Water that contains chemicals
exceeding the levels below can damage
the boiler.
* Source: Part 143 Naonal Secondary
Drinking Water Regulaons
When choosing an installaon locaon, you
must ensure that clearances will be met and
that the vent length will be within required
limits. Consider the installaon
environment, water quality, and need for
freeze protecon. Requirements for the gas
line, water lines, electrical connecon, and
condensate disposal can be found in their
respecve installaon secons in this
manual.
This secon provides informaon on the
importance of water quality to the Rinnai
Condensing Boiler. The informaon is
intended to serve as general guidelines only
and is not a complete list of water quality
guidelines.
• Unsuitable heang system water can cause
the formaon of scale or sludge, which
aects system eciency. It can also cause
corrosion and reduce life of the heat
exchanger.
• Never use water that has been treated by a
reverse osmosis, deionized, or dislled
water to soen the water to ll the heang
system.
• For Domesc Hot Water systems, if you
install the boiler in an area that is known to
have hard water or that causes scale build-
up, the water must be treated and may
require a more frequent ushing schedule.
Scale build-up is caused by hard water and
can be accelerated if the boiler is set at a
high temperature. Rinnai oers
Southeastern Filtraon’s “ScaleCuer Water
Condioning System” that oers superior
lime scale prevenon and corrosion control
by feeding a blend of control compounds
into the cold water supply.
• Oxygen permeable or rubber tubing is not
permied in the heang system unless it is
separated from the boiler by a plate heat
exchanger. The boiler warranty may be
voided if connected directly to CH systems
that include this tubing.
• Thoroughly ush the system prior to lling.
While ushing, isolate the boiler.
• Do not introduce any system cleaner into
the boiler. Flush the system thoroughly to
remove all system cleaner before lling the
boiler with water.
• When freeze protecon of the heang
system is desired, only use Rinnai-approved
anfreezes. The allowed maximum
concentraon is 50%.
• Reference secon “14.1 Approved Cleaners,
Inhibitors and Anfreezes” in the Appendix
for an approved list of system cleaners,
inhibitors, and anfreezes.
IMPORTANT
Replacement of components due to
water quality damage is not covered by
the warranty.
Rinnai M-Series Condensing Boiler Combi Manual 19
Use this checklist to ensure you have selected the correct locaon for the boiler.
Air surrounding the boiler, venng, and vent terminaon(s) is used for combuson and must be
free of any compounds that cause corrosion of internal components. These include corrosive
compounds that are found in aerosol sprays, detergents, bleaches, cleaning solvents, oil based
paints/varnishes, and refrigerants. The air in beauty shops, dry cleaning stores, photo processing
labs, and storage areas for pool supplies oen contains these compounds. The boiler, venng, and
vent terminaon(s) should not be installed in any areas where the air may contain these corrosive
compounds.
Locaon Clearance
Top 2 in. (51 mm)
0 in. from vent components
Boom (Ground) 12 in. (305 mm)
Front
6 in. (152 mm)
Clearance for servicing is
24 in. (610 mm) in front
of boiler
Back 0 in.
Sides (Le and Right) 2 in. (51 mm)
Vent 0 in.
□
The boiler is not exposed to corrosive compounds in the air.
□
The boiler locaon complies with the required clearances.
□
The planned combuson air and exhaust terminaon locaons meet the required clearances.
□
The water supply does not contain chemicals or exceed total hardness that will damage the
heat exchanger.
□
A standard 3 prong 120 VAC, 60 Hz properly grounded wall outlet or other 120 VAC, 60 Hz
source is available.
□
The installaon must conform with local codes or, in the absence of local codes, with the
Naonal Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane Installaon
Code, CSA B149.1.
Top
Boom
WALL
Front
2 in. (51 mm)
Minimum
12 in. (305 mm)
Minimum
2 in. (51 mm)
Minimum
Right image is not to scale and is for illustraon
purposes only.
Side
20 Rinnai M-Series Condensing Boiler Combi Manual
Supplied by Installer:
• Level
• Four screws for mounng bracket
installaon
• Screws for top and boom bracket
installaon
Use appropriate screws for type of
wall construcon.
Hold the wall mounng bracket up
against the wall and use a level to
make sure the bracket is even. Proper
operaon requires the boiler to be
level.
You Will Need:
• Rinnai Condensing Boiler
• Wall Mounng Bracket
• Boiler Mounng Template
Insert the top mounng lip of the boiler
onto the wall mounng bracket. Make
sure the wall mounng bracket is
aached to the wall and can hold the
weight of the boiler before you fully let
go.
Instrucons:
Wall Mounng Bracket
Level
Use the appropriate screws for the wall
construcon to secure the mounng
bracket to the wall (use any of the
screw holes in the mounng bracket).
Assembled view
Boiler mounng template
Rinnai M-Series Condensing Boiler Combi Manual 21
• M-Series boilers can be installed in
direct vent or non-direct vent
applicaons.
• When installed as Direct Vent, refer to
the following secon for a complete
list of approved vent manufacturers
and products: “5.4.1 Direct Vent:
Approved Vent Manufacturers and
Products.”
• When installed as Non-Direct Vent
(Room Air), the vent must be Category
IV and of a type listed by a naonal
recognized tesng agency.
• Exhaust must be directly vented to
the outside. Combuson air can be
provided from outside (Direct Vent) or
from room air (Non-Direct Vent).
• If using room air (non-direct vent) for
combuson, ensure the required
volume of indoor air is available
according to the Naonal Fuel Gas
Code, ANSI Z223.1/NFPA 54.
• Avoid dips or sags in horizontal vent
runs by installing supports per the
vent manufacturer’s instrucons.
• Support horizontal vent runs every 4
(1.2 m) and all vercal vent runs
every 6 (1.83 m) or as per vent
manufacturer’s instrucons or local
code requirements.
Topics in this secon
• Guidelines
• Venng Installaon Sequence
• Terminaon Consideraons
• Venng Opons
5
• Venng should be as direct as possible
with a minimum number of pipe ngs.
• For manufactured vent systems, vent
connecons must be rmly pressed
together so that the connecons form an
air ght seal. Follow the venng
manufacturer’s instrucons.
• Refer to the Schedule 40 PVC/CPVC
manufacturer for appropriate ngs,
solvents or joining methods.
• If venng reassembly is needed, follow
the steps for installing the venng in the
following secons. Make certain that the
vent piping and seals are not damaged.
Only use sealants, primers, or glues that
are approved for the vent material in use.
• Refer to the instrucons of the vent
system manufacturer for component
assembly instrucons.
• If the vent system is to be enclosed, it is
suggested that the design of the enclosure
shall permit inspecon of the vent system.
The design of such enclosure shall be
deemed acceptable by the installer or the
local inspector.
• Any issues resulng from improper vent
installaon will not be covered by
warranty.
• DO NOT use cellular core PVC/CPVC.
• DO NOT use Radel, ABS, or galvanized
material to vent this appliance.
• DO NOT cover non-metallic vent pipe
and ngs with thermal insulaon.
• DO NOT combine vent components
from dierent manufacturers.
• DO NOT reduce the vent diameter. Vent
diameter cannot be less than 2 in.
• DO NOT connect the venng system
with an exisng vent or chimney.
• DO NOT common vent with the vent
pipe of any other manufacturer’s boiler
or appliance.
WARNING
22 Rinnai M-Series Condensing Boiler Combi Manual
1. Determine the terminaon method—
horizontal or vercal, concentric, or twin
pipes, etc.
2. Determine proper locaon for wall or roof
penetraon for each terminaon.
3. Install terminaon assembly as described in
this manual or in the vent manufacturer’s
installaon instrucons.
4. Install air and vent piping from boiler to
terminaon.
5. Slope horizontal exhaust run towards the
boiler 1/4 in. per foot. DO NOT slope
combuson air pipe towards boiler.
6. Install vent supports and brackets allowing
for movement from expansion, or as per
vent manufacturer’s instrucons or local
code requirements.
7. (Oponal step) Install vent screen or room
air lter (not included with purchase) on
Schedule 40 PVC combuson air and
exhaust terminaon elbows as illustrated
below.
Check to determine whether local codes
supersede the following clearances:
• Avoid terminaon locaons near a dryer
vent.
Vent Screen
• Press vent screen inside
of terminaon piece/
elbow.
• Secure vent screen to
the elbow with screw.
The vent for this appliance shall not terminate:
• Over public walkways.
• Near sot vents or crawl space vents or
other area where condensate or vapor
could create a nuisance or hazard or
cause property damage.
• Where condensate or vapor could cause
damage or could be detrimental to the
operaon of regulators pressure relief
valves, or other equipment.
Listed below are important consideraons for
locang vent terminaon under a sot
(venlated or unvenlated or eave vent; or to a
deck or porch):
• Do not install vent terminaon under a
sot vent such that exhaust can enter
the sot vent.
• Install vent terminaon such that exhaust
and rising moisture will not collect under
eaves. Discoloraon to the exterior of the
building could occur if installed too close.
• Do not install the vent terminaon too
close under the sot where it could
present recirculaon of exhaust gases
back into the combuson air intake of the
terminaon.
Horizontal porons of the venng system shall
be supported to prevent sagging:
• For category IV boilers, have horizontal
runs sloping upwards not less than 1/4 in.
per foot (21 mm/m) from the boiler to
the vent terminal;
• For category IV boilers, be installed so as
to prevent accumulaon of condensate;
and
• For category IV boilers, where necessary,
have means provided for drainage of
condensate.
Press air lter into the 3 in.
(80 mm)
PP intake air ng
on the boiler.
Room Air Filter
• Avoid terminaon locaons near
commercial cooking exhaust.
• Avoid terminaon locaons near any air
inlets.
• You must install a vent terminaon at
least 12 in above the ground or
ancipated snow level.
Rinnai M-Series Condensing Boiler Combi Manual 23
Two
venng opons are available: Direct Vent and Non-Direct Vent (Room Air).
Concentric Pipe
Combuson air and exhaust vent directly
through a single concentric connecon. Hot
exhaust exits through the interior tube, while
combuson air enters through the outer layer.
Exhaust
Twin Pipe
Combuson air and exhaust vent directly
through separate penetraons.
Direct Vent (Concentric and Twin Pipe)
Room air lter
(accessory)
Opon 1
Room Air Opon 2
Combuson
air
Combuson
air
Exhaust
Combuson
air
Exhaust
Combuson
air
See Direct Vent secon for complete details.
See Room Air secon for complete details.
Exhaust
Combuson air
24 Rinnai M-Series Condensing Boiler Combi Manual
Following is a list of vent components and terminaons for Direct Vent installaons (concentric and
twin pipe). Install the correct venng for your model according to the venng manufacturer’s
instrucons and the guidelines below. The informaon below is correct at me of publicaon and is
subject to change without noce. Contact the vent manufacturer for quesons related to the vent
system, products, part numbers and instrucons.
Manufacturer Phone Web Site
Ubbink 800-621-9419 www.rinnai.us
Centrotherm 877-434-3432 www.centrotherm.us.com
Heat-Fab 800-772-0739 www.heaab.com
Metal Fab 800-835-2830 www.metal-fabinc.com
IPEX U.S.: 800-463-9572
Canada: 866-473-9462
www.ipexamerica.com, www.ipexinc.com
DuraVent 800-835-4429 www.duravent.com
Royal 800-232-5690 www.royalbuildingproducts.com
ECCO Manufacturing 877-955-4805 www.eccomfg.com
DiversiTech 800-995-2222 www.diversitech.com
Z-FLEX 603-669-5136 www.z-ex.com
2 in./4 in. CONCENTRIC VENT TERMINATIONS
229011NPP
229012NPP
229013NPP
2/4 Condensing Horizontal Terminaon Kit 8.7 in.
2/4 Condensing Horizontal Terminaon Kit 12 in.
2/4 Condensing Horizontal Terminaon Kit 21 in.
5
224356NPP 2/4 Condensing Roof Discharge Terminaon
20 in. above roof
5
710202NPP
2/4 Condensing 90 Degree Diverter Nose
(Use with Wall Terminal)
5
710215NPP
2/4 Condensing 45 Degree Diverter Nose
(Use with Wall Terminal)
5
196005,
197040
FGV Concentric Vent Kit (16 in. length)
20
196105,
197033
FGV Concentric Vent Kit (28 in. length)
20
196125 FGV Concentric Vent Kit (40 in. length)
20
UBBINK
IPEX
Manufacturer
Manufacturer
Part Number
Product
Descripon
Diagram
Horizontal
Vercal
Equivalent Length
()
2 in./4 in. CONCENTRIC VENT TERMINATIONS
Rinnai M-Series Condensing Boiler Combi Manual 25
2 in./4 in. CONCENTRIC VENT TERMINATIONS (Connued)
52CVKGVS6502
PVC Concentric Vent Kit
2 in. x 16 in.
20
52CVKGVS6502-28
PVC Concentric Vent Kit
2 in. x 28 in.
20
52CVKGVS6502-40
PVC Concentric Vent Kit
2 in. x 40 in.
20
ICRT2439 2 in. x 4 in. Concentric Roof
Terminaon
20
2PPS-VKL/VK-TCL 2 in. x 4 in. Vercal
Terminaon Cap
Kit-Concentric
20
2PPS-HKL
2 in. x 4 in. Horizontal
Terminaon Kit-Concentric
20
190288
2 in. x 4 in. Concentric
Horizontal Terminaon
5
190295 2 in. x 4 in. Concentric
Vercal Terminaon
5
CVENT-2 2 in. x 4 in. Concentric
Horizontal Terminaon
20
2ZDCTH24
2 in. x 4 in. Concentric
Horizontal Terminaon
5
2ZDCTV24
2 in. x 4 in. Concentric Roof
Terminaon
5
ROYAL
CENTROTHERM
DURAVENT
Manufacturer
Manufacturer
Part Number
Product
Descripon
Diagram
Horizontal
Vercal
Equivalent Length
()
ECCO DIVERSITECH
Z-FLEX
26 Rinnai M-Series Condensing Boiler Combi Manual
3 in./5 in. CONCENTRIC VENT TERMINATIONS
223174PP
223176PP
223177PP
3/5 Condensing Horizontal
Terminaon Kit 8.7 in.
3/5 Condensing Horizontal
Terminaon Kit 12 in.
3/5 Condensing Horizontal
Terminaon Kit 21 in.
5
223186PP 3/5 Condensing Horizontal Diverter
Terminaon Kit 19 in.
16
224047PP 3/5 Condensing Raised Horizontal
Terminaon Kit
24
184162PP 3/5 Condensing Roof Discharge
Terminaon 20 in. above roof
5
196006, 197009
FGV Concentric Vent Kit 3 in. x 20
in.
20
196106, 197107
FGV Concentric Vent Kit 3 in. x 32
in.
20
196116, 197117
FGV Concentric Vent Kit 3 in. x 44
in.
20
52CVKGVS6503 (PVC)/
52CVKGVSF9003 (CPVC)
PVC/CPVC Concentric Vent Kit 3 in.
x 20 in.
20
52CVKGVS6503-32
(PVC)/ 52CVKGVSF9003-
32 (CPVC)
PVC/CPVC Concentric Vent Kit 3 in.
x 32 in.
20
52CVKGVS6503-44
(PVC)/ 52CVKGVSF9003-
44 (CPVC)
PVC/CPVC Concentric Vent Kit 3 in.
x 44 in.
20
SC03HT
Horizontal Terminaon Adapter
20
SC03VT
Vercal Terminaon Adapter
20
ICRT3539
3 in./5 in. Concentric Roof
Terminaon PPs-UV
20
UBBINK
IPEX
ROYAL
CENTROTHERM
HEAT-FAB
Manufacturer
Manufacturer
Part Number
Product
Descripon
Diagram
Horizontal
Vercal
Equivalent Length
()
3 in./5 in. CONCENTRIC VENT TERMINATIONS
Rinnai M-Series Condensing Boiler Combi Manual 27
3 in./5 in. CONCENTRIC VENT TERMINATIONS (Connued)
3CGRLSV Vercal Adapter
1
3CGRLSH Horizontal Adapter
6
3CGRVT Vercal Terminaon
5
3CGRHT Horizontal Terminaon
16
3PPS-VKL/VK-TCL 3 in. x 5 in. Vercal Terminaon Cap
Kit-Concentric
20
3PPS-HKL 3 in. x 5 in. Horizontal Terminaon
Kit-Concentric
20
190388 3 in. x 5 in. Concentric
Horizontal Terminaon
5
190395 3 in. x 5 in. Concentric Vercal
Terminaon
5
CVENT-3 3 in. x 5 in. Concentric
Horizontal Terminaon
20
2ZDCTH35 3 in. x 5 in. Concentric
Horizontal Terminaon
5
2ZDCTV35 3 in. x 5 in. Concentric Roof
Terminaon
5
METAL-FAB
DURAVENT
Manufacturer
Manufacturer
Part Number
Product
Descripon
Diagram
Horizontal
Vercal
Equivalent
Length ()
ECCO
DIVERSITECH
Z-FLEX
28 Rinnai M-Series Condensing Boiler Combi Manual
2 in. TWIN PIPE TERMINATIONS
2 in. TWIN PIPE TERMINATIONS
ISELL0287UV 2 in. 87° Long PPS-UV
6
ISTT0220 2 in. Terminaon Tee
6
ISLPT0202
2 in. Low Prole Wall
Terminaon
5
2PPS-HTPL 2 in. Twin Pipe Terminaon
10
2PPS-HSTL 2 in. Single Horizontal
Terminaon
6
2PPS-TBL 2 in. Black UV Resistant Tee
5
196984
FGV PVC Low Prole
Terminaon Kit
5
081216
FGV PVC Wall Terminaon
Kit
16
52SWVKGVS6502 PVC Side Wall Vent Kits
5
52WTVKGVS6502 PVC Wall Vent Kits
16
HVENT-2
2 in. Low Prole Horizontal
Vent Kit
5
CENTROTHERM
DURAVENT
Manufacturer
Manufacturer
Part Number
Product
Descripon
Diagram
Horizontal
Vercal
Equivalent
Length ()
IPEX
ROYAL
DIVERSITECH
Rinnai M-Series Condensing Boiler Combi Manual 29
3 in. TWIN PIPE TERMINATIONS
3 in. TWIN PIPE TERMINATIONS
ISELL0387UV 3 in. 87° Long PPS-UV
6
ISTT0320 3 in. Terminaon Tee
6
ISLPT0303 3 in. Low Prole Wall
Terminaon
5
3PPS-HTPL 3 in. Twin Pipe Terminaon
10
3PPS-HSTL 3 in. Single Horizontal
Terminaon
5
3PPS-TBL 3 in. Black UV Resistant Tee
6
196985 FGV PVC Low Prole
Terminaon Kit
5
081219 FGV PVC Wall
Terminaon Kit
16
52SWVKGVS6503 PVC Side Wall Vent Kits
5
52WTVKGVS6503 PVC Wall Vent Kits
16
HVENT-3 3 in. Low Prole Horizontal
Vent Kit
5
CENTROTHERM
DURAVENT
Manufacturer
Manufacturer
Part Number
Product
Descripon
Diagram
Horizontal
Vercal
Equivalent
Length ()
IPEX
ROYAL
DIVERSITECH
30 Rinnai M-Series Condensing Boiler Combi Manual
VARIOUS 2 in. OR 3 in. SCHEDULE 40 PVC/CPVC TERMINATIONS
Approved PVC/CPVC Vent and Air Piping Material
Item Material
Standard for Installaon in North America
United States Canada
Thermoplasc Piping Materials
Vent or Combuson
Air Intake Pipe and
Fings
PVC Schedule 40 ANSI/ASTM D1785
Thermoplasc vent pipe must
be cered to ULC S636.
Intake pipe may be of the
materials listed in this table.
PVC-DWV ANSI/ASTM D2665
CPVC Schedule 40 ANSI/ASTM F441
PVC Pipe Cement
and Primer
PVC ANSI/ASTM D2564
CPVC Schedule 40 ANSI/ASTM F493
PVC Vent Screens
Terminaon Vent
Screens
Polyethylene
• 2 in. Vent Screens (included in carton box) (IPEX
Part Number: 196050)
• 3 in. Vent Screens (IPEX Part Number: 196051)
Exhaust piping must be of solid core material. Refer to the PVC/CPVC manufacturer for
appropriate ngs, solvents or joining methods.
Manufacturer Vent Material
Ubbink PVC (Outer Vent), Polypropylene (Inner Vent)
Centrotherm Polypropylene
Heat-Fab Metal
Metal Fab Metal
IPEX PVC/CPVC
DuraVent Polypropylene
Royal PVC
ECCO Manufacturing Polypropylene
DiversiTech PVC/CPVC
Z-FLEX Polypropylene
APPROVED VENTING MATERIALS BY MANUFACTURER
Air Filter Screen
N/A
Tee
5
90° Elbow
5
2.5 45° Elbow
Product
Descripon
Diagram
Horizontal
Vercal
Equivalent
Length ()
Rinnai M-Series Condensing Boiler Combi Manual 31
Canadian Installaons
(CSA B149.1)
U.S. Installaons
(ANSI Z223.1 /NFPA 54)
Ref Descripon Direct Vent (Indoor Unit) Direct Vent (Indoor Unit)
A Clearance above grade, veranda, porch, deck, or balcony 12 in. (30 cm) 12 in. (30 cm)
B Clearance to window or door that may be opened 36 in. (91 cm) 12 in. (30 cm)
C Clearance to permanently closed window * *
D
Vercal clearance to venlated sot, located above the terminal within a
horizontal distance of 2 (61 cm) from the center line of the terminal
* *
E Clearance to unvenlated sot * *
F Clearance to outside corner * *
G Clearance to inside corner * *
H
Clearance to each side of center line extended above meter/regulator
assembly
* *
I Clearance to service regulator vent outlet
Above a regulator within 3
(91 cm) horizontally of the vercal
center line of the regulator vent
outlet to a maximum vercal
distance of 15 (4 m)
*
J
Clearance to non-mechanical air supply inlet to building or the
combuson air inlet to any other appliance
36 in. (91 cm) 12 in. (30 cm)
K Clearance to a mechanical air supply inlet 6 (1.83 m)
3 (91 cm) above if within
10 (3 m) horizontally
L
Clearance above paved sidewalk or paved driveway located on public
property
7 (2.13 m) [1] *
M Clearance under veranda, porch, deck, or balcony 12 in. (30 cm) [2] *
AIR SUPPLY INLET
VENT TERMINAL
AREA WHERE TERMINAL
IS NOT PERMITTTED
X
V
SNOW
TERMINATION
Clearance in
Ref. A also
applies to
anticipated
snow line
Clearance to opposite wall is 24 in. (60 cm).
[1] A vent shall not terminate directly above a sidewalk or paved driveway that
is located between two single family dwellings and serves both dwellings.
[2] Permied only if veranda, porch, deck, or balcony is fully open on a mini-
mum of two sides beneath the oor.
Clearances are in accordance with local installaon codes and the
requirements of the gas supplier.
The informaon below applies to Concentric and Twin Pipe.
32 Rinnai M-Series Condensing Boiler Combi Manual
All terminaons (horizontal and/or vercal)
must terminate 12 in. (0.30 m) above grade or
ancipated snow level.
12 in. (0.30 m)
Between terminals at same level
60 in. (1.52 m)
Between terminals at dierent levels
Note: 24 in. (0.61 m)
to wall or parapet
Inside
Corner
12 in.
(0.30 m)
12 in.
(0.30 m)
60 in. (1.52 m) vercally
between terminals
Vent Sizes 3 in. X 5 in. 2 in. X 4 in.
Boiler Model
Number
M060C M090C, M120C, M160C M060C M090C, M120C, M160C
Vent Lengths 60 (18 m) 30 (9 m) 150 (46 m) 140 (43 m)
• 45° elbow is equivalent to 3 (1 m)
• 90° elbow is equivalent to 6 (2 m)
Rinnai M-Series Condensing Boiler Combi Manual 33
The instrucons below apply to concentric
vent sizes 2 in. x 4 in. and 3 in. x 5 in.
Horizontal Wall Terminaons
Vercal Roof
Terminaons
2 in. x 4 in.
and
3 in. x 5 in.
2 in. x 4 in.
and
3 in. x 5 in.
Install the venng terminaon according to the diagrams and instrucons in this manual. Slope the
venting 1/4 in. per foot toward the appliance according to the vent manufacturer’s installation
instructions. Dispose of condensate per local codes.
IMPORTANT
Remove the vent top (slightly twist
counter-clockwise and pull up). Discard
vent top if desired.
Pull up
Slightly twist counter-clockwise
Insert the concentric adapter and rotate
clockwise unl locked in place.
34 Rinnai M-Series Condensing Boiler Combi Manual
ACCEPTABLE ACCEPTABLE NOT ACCEPTABLE
90° Elbows, Long Sweep 90° Elbows, Short Sweep
90° Elbows, Close Turn
Vent length includes the addional venng, ngs and terminaons.
12 in. (0.30 m) above
grade or ancipated
snow level
Exhaust
Combuson
Air
Exhaust
Zone
60 in. (1.5 m)
minimum
12 in. (0.30 m)
minimum
Wall
Horizontal Vent and
Combuson Air Piping
Combuson air terminaon not permied in
shaded area
Vent Sizes
• 3 in. PVC
• 3 in. (80 mm) PP
• 2 in. PVC
• 2 in. (60 mm) PP
Boiler Model
Number
M060C M090C, M120C, M160C M060C M090C, M120C, M160C
Vent Lengths 60 (18 m) 30 (9 m) 150 (46 m) 140 (43 m)
• 45° elbow is equivalent to 3 (1 m)
• 90° elbow is equivalent to 6 (2 m)
12 in. (0.30 m) minimum
12 in. (0.30
m) minimum
above
combuson
air opening
Roof
12 in. (0.30
m) above
grade or
ancipated
snow level
12 in. (0.30 m)
minimum
Combuson
Air
Exhaust
Rinnai M-Series Condensing Boiler Combi Manual 35
DO NOT apply PVC glues, solvents, or cleaners to the boiler’s combuson
air or exhaust gasket connecons. Failure to correctly assemble the
components according to these instrucons may result in property damage, personal injury, or
death.
WARNING
Install 3 in. (80 mm)
Polypropylene (PP)
1
This boiler is equipped with a 3 in. PVC pipe connecon. With the use of a pipe reducer, installers
can use a 2 in. pipe for the combuson air and exhaust.
Insert 3 in. (80 mm) PP piping.
Install 3 in. PVC
Insert the 3 in. PVC
adapter onto the vent top.
1
2
Insert 3 in. PVC piping.
Install 2 in. PVC or PP (60 mm)
Install 2 in. PVC or PP piping.
Insert 3 in. PVC adapter.
Insert 2 in. reducer.
2
1
36 Rinnai M-Series Condensing Boiler Combi Manual
Rinnai cauons against installing the boiler in applicaons with venng in
dierent pressure planes. It is possible to have poor performance with this
installaon.
Slope horizontal exhaust 1/4 in. per foot towards the boiler. DO NOT slope combuson air pipe
towards the boiler.
2 in. or 3 in.
PVC/CPVC
IPEX / Royal
Concentric
Side Wall
Terminaon
Conguraon
2 in. or 3 in.
PVC/CPVC
IPEX /Royal
Concentric
Vercal
Terminaon
Conguraon
2 in. or 3 in.
Schedule 40
PVC/CPVC
Snorkel
Terminaon
Conguraon
2 in. or 3 in.
Schedule 40
PVC/CPVC
Standard
Upside Down
"U" Vercal
Terminaon
Conguraon
2 in. or 3 in.
Schedule 40
PVC/CPVC
Elbow or Tee
Side Wall
Terminaon
Conguraon
2 in. or 3 in.
Schedule 40
PVC/CPVC Tee
Vercal
Terminaon
Conguraon
2 in. or 3 in.
PVC Low
Prole
Terminaon
Conguraon
This conguraon requires the use of
a Concentric Vent Terminaon.
This conguraon requires the use of a
Concentric Vent Terminaon.
CAUTION
Tee not
permissible
for intake
terminaon
Tee not
permissible
for intake
terminaon
WARNING
Exhaust
Combuson
Air
Single
Pipe
Exhaust and
combuson air
MUST NOT be
brought together
into a single PVC
pipe using a pipe
ng.
Unbalanced venng. Intake
and exhaust terminated on
dierent pressure planes.
Rinnai M-Series Condensing Boiler Combi Manual 37
Canadian Installaons
(CSA B149.1)
U.S. Installaons
(ANSI Z223.1 /NFPA 54)
Ref Descripon Other than Direct Vent (Room Air) Other than Direct Vent (Room Air)
A Clearance above grade, veranda, porch, deck, or balcony 12 in. (30 cm) 12 in. (30 cm)
B Clearance to window or door that may be opened 36 in. (91 cm)
4 (1.2 m) below or to side of opening;
1 (300 mm) above opening
C Clearance to permanently closed window * *
D
Vercal clearance to venlated sot, located above the
terminal within a horizontal distance of 2 (61 cm) from
the center line of the terminal
* *
E Clearance to unvenlated sot * *
F Clearance to outside corner * *
G Clearance to inside corner * *
H
Clearance to each side of center line extended above
meter/regulator assembly
* *
I Clearance to service regulator vent outlet
Above a regulator within 3 (91 cm)
horizontally of the vercal center line of
the regulator vent outlet to a maximum
vercal distance of 15 (4 m)
*
J
Clearance to non-mechanical air supply inlet to building or
the combuson air inlet to any other appliance
12 in (30 cm) for appliances > 10,000 Btuh
(3 kW) and ≤ 100,000 Btuh (30 kW), 36 in
(91 cm) for appliances >100,000 Btuh (30
kW)
4 (1.2 m) below or to side of opening;
1 (300 mm) above opening
K Clearance to a mechanical air supply inlet 6 (1.83 m)
3 (91 cm) above if within 10
(3 m) horizontally
L
Clearance above paved sidewalk or paved driveway located
on public property
7 (2.13 m) [1] 7 (2.13 m)
M Clearance under veranda, porch, deck, or balcony 12 in. (30 cm) [2] *
AIR SUPPLY INLET
VENT TERMINAL
AREA WHERE TERMINAL
IS NOT PERMITTTED
X
V
SNOW
TERMINATION
Clearance in
Ref. A also
applies to
anticipated
snow line
Clearance to opposite wall is 24 in. (60 cm).
[1] A vent shall not terminate directly above a sidewalk or paved driveway that
is located between two single family dwellings and serves both dwellings.
[2] Permied only if veranda, porch, deck, or balcony is fully open on a mini-
mum of two sides beneath the oor.
Clearances are in accordance with local installaon codes and the
requirements of the gas supplier.
38 Rinnai M-Series Condensing Boiler Combi Manual
Room Air Vercal Terminaon of Mulple Boilers
Exhaust Terminaon Clearances for Internal (Indoor) Room Air Applicaons
Exhaust
Roof
12 in. (0.30 m)
minimum
12 in. (0.30 m) above
grade or ancipated
snow level
60 in.
12 in.
12 in.
(0.30 m)
Inside
Corner
(1.52 m) Vercally
between
terminals
IMPORTANT
• Installaon of Room Air must use listed Category IV venng.
• All terminaons (horizontal and/or vercal) must terminate 12 in. above grade or
ancipated snow level.
Rinnai M-Series Condensing Boiler Combi Manual 39
ACCEPTABLE ACCEPTABLE NOT ACCEPTABLE
90° Elbows,
Long Sweep
90° Elbows,
Short Sweep
90° Elbows,
Close Turn
Vent length includes the addional venng, ngs and terminaons.
Insert air lter or elbow into 3 in. PVC intake air ng.
ROOM AIR: INSTALLATION INSTRUCTIONS
Air Filter
Elbow
Vent Sizes
• 2 in. PVC
• 2 in. (60 mm) PP
• 3 in. PVC
• 3 in. (80 mm) PP
2 in. (51mm) Ubbink Flex
Boiler Model
Number
M060C M090C,
M120C,
M160C
M060C M090C,
M120C,
M160C
M060C M090C,
M120C,
M160C
Vent Lengths 60 (18 m) 30 (9 m) 150 (46 m) 140 (43 m) 60 (18 m) 30 (9 m)
• 45° elbow is equivalent to 3 (1 m)
• 90° elbow is equivalent to 6 (2 m)
40 Rinnai M-Series Condensing Boiler Combi Manual
• This boiler requires adequate combuson air for venlaon and diluon of ue gases. Failure
to provide adequate combuson air can result in unit failure, re, explosion, serious bodily
injury or death. Use the following methods to ensure adequate combuson air is available for
correct and safe operaon of this boiler.
• Direct Venng is recommended in unusually ght buildings or in installaon locaons subject
to signicant negave air pressure.
Combuson air must be free of corrosive chemicals. Do not provide combuson air from
corrosive environments. Appliance failure due to corrosive air is not covered by warranty.
IMPORTANT
For applicaons containing corrosive indoor air, this appliance must be installed as direct vent. DO
NOT use room air in applicaons where combuson air contains acid forming chemicals such as
sulfur, uorine and chlorine. These chemicals have been found to cause rapid damage and decay
and can become toxic when used as combuson air in gas appliances. Such chemicals can be found
in, but not limited to bleach, ammonia, cat lier, aerosol sprays, cleaning solvents, varnish, paint
and air fresheners. Do not store these products or similar products in the vicinity of this boiler.
WARNING
Unconned Space
An unconned space is dened in Naonal Fuel Gas Code, ANSI Z223.1/NFPA 54 as “a space whose
volume is not less than 50 cubic feet per 1000 Btu/hr (4.8 m3 per kW per hour) of the aggregate
input rang of all appliances installed in that space. Rooms communicang directly with the space
in which the appliances are installed, through openings not furnished with doors, are considered a
part of the unconned space.” If the “unconned space” containing the appliance(s) is in a building
with ght construcon, addional outside air may be required for proper operaon. Outside air
openings should be sized the same as for a conned space.
Conned Space
A conned space is dened in the Naonal Fuel Gas Code, ANSI Z223.1/NFPA 54 as "a space whose
volume is less than 50 cubic feet per 1000 Btu/hr (4.8 m3 per kW per hour) of the aggregate input
rang of all appliances installed in that space." Examples include a small room, closet, alcove, ulity
room, etc. A conned space must have two combuson air openings. Size the combuson air
openings based on the Btu input for all gas ulizaon equipment in the space and the method by
which combuson air is supplied.
Using Indoor Air For Combuson
When using air from other room(s) in the building, the total volume of the room(s) must be of
adequate volume (greater than 50 cubic feet per 1000 Btu/hr). Combuson air openings between
joining rooms must have at least 1 square inch of free area for each 1000 Btu/hr, but not less than
100 square inches each.
Using Outdoor Air For Combuson
Outdoor air can be provided to a conned space through two permanent openings, one
commencing within 12 in. (0.30 m) of the top and one commencing within 12 in. (0.30 m) of the
boom, of the conned space. The openings shall communicate to the outside by one of two ways.
When communicang directly with the outdoors through horizontal ducts, each opening shall have
a minimum free area of 1 in
2
/2000 Btu/hr (1100 mm
2
/kW) of total input rang of all appliances in
the conned space.
Rinnai M-Series Condensing Boiler Combi Manual 41
Note: If ducts are used, the cross seconal area of the duct must be greater than or equal to the
required free area of the openings to which they are connected.
Louvers and Grills
When sizing the permanent opening consideraon must be taken for the design of the louvers or
grills to maintain the required free area required for all gas ulizing equipment in the space. If the
free area of the louver or grill design is not available, assume wood louvers will have 25% free area
and metal louvers or grills will have 75% free area. Under no circumstance should the louver, grill
or screen have openings smaller than 1/4 in.
Examples: Wood: 10 in. x 12 in. x 0.25 = 30 in.
2
Metal: 10 in. x 12 in. x 0.75 = 90 in.
2
Combuson air provided to the appliance should not be taken from any area of the structure
that may produce a negave pressure (i.e. exhaust fans, powered venlaon fans).
Locaon
To maintain proper circulaon of combuson air two permanent openings (one upper, one lower)
must be posioned in conned spaces. The upper shall be within 12 in. (0.30 m) of the top of the
conned space and the lower opening shall be within 12 in. (0.30 m) of the boom of the conned
space. Openings must be posioned as to never be obstructed.
12 in.
(300 mm)
10 in.
(250 mm)
□
Verify all combuson air opening sizes are correct.
□
Ensure that the Combuson Air Requirements are followed that will provide sucient
combuson air for the appliance.
□
DO NOT use room air for combuson in applicaons where the indoor air is corrosive.
□
Verify that adequate combuson air is available for all appliances installed in the space.
□
Installaon complies with Naonal Fuel Gas Code, ANSI Z223.1/NFPA 54 as well as local
and state regulaons therein.
To prevent possible personal injury or death due to asphyxiaon, common
venng with other manufacturer’s induced dra appliances is not allowed.
IMPORTANT
WARNING
42 Rinnai M-Series Condensing Boiler Combi Manual
Rinnai cauons against installing the boiler in applicaons with venng in
dierent pressure planes. It is possible to have poor performance with this
installaon.
CAUTION
B-Vent Pipe
4 in. (102 mm)
PP Flex Venng
2 in. or 3 in.
Schedule 40
PVC/CPVC Snorkel
Terminaon
Conguraon
2 in. or 3 in.
Schedule 40
PVC/CPVC Standard
Upside Down "U"
Vercal Terminaon
Conguraon
2 in. or 3 in.
Schedule 40
PVC/CPVC Elbow or
Tee Side Wall
Terminaon
Conguraon
2 in. or 3 in.
Schedule 40
PVC/CPVC Tee
Vercal Terminaon
Conguraon
Ubbink exible venng
approved for vercal
non-direct vent (room
air) applicaons only.
Refer to the ex vent
manual for further
details.
Terminaon PN:
184470NPP
Flex Roll: 222721NPP
Rinnai M-Series Condensing Boiler Combi Manual 43
• The boiler shall be installed such
that the gas ignion system
components are protected from
water (dripping, spraying, rain, etc.)
during appliance operaon and
service (circulator replacement,
condensate trap, control
replacement, etc.).
• A sediment trap must be provided
upstream of the gas controls.
• A manual gas shuto valve between
the gas supply and the boiler must
be installed.
• A licensed professional must
install the gas supply.
• Turn o 120V power supply.
• Turn o the gas.
• Gas is ammable. Do not smoke
or provide other ignion sources
while working with gas.
• Do not turn on the boiler or gas
unl all fumes are gone.
Topics in this secon
• Connect the Gas Supply
• Gas Operang Instrucons
• Gas Pipe Sizing Reference Tables
6
Gas Shut O
Valve
IMPORTANT
WARNING
44 Rinnai M-Series Condensing Boiler Combi Manual
4. Before placing the appliance in operaon,
all joints including the connecon to the
boiler must be checked for gas ghtness by
means of soap, gas leak detector soluon,
or an equivalent nonammable soluon, as
applicable. Since some leak test soluons,
including soap and water, may cause
corrosion or stress cracking, the piping shall
be rinsed with water aer tesng, unless it
has been determined that the leak test
soluon is non-corrosive.
5. Use approved and appropriately sized
connectors to connect the boiler to the gas
line. Purge the gas line of any debris before
connecon to the boiler.
6. Any compound used on the threaded joint
of the gas piping shall be a type that resists
the acon of liqueed petroleum gas
(propane/LPG).
7. The gas supply line shall be gas ght, sized,
and so installed as to provide a supply of gas
sucient to meet the maximum demand of
the heater and all other gas consuming
appliances at the locaon without loss of
pressure. If in doubt about the size of the
gas line, refer to secon “6.3 Gas Pipe Sizing
Reference Tables.”
8. Perform a leak and pressure test prior to
operang the boiler. If a leak is detected, do
not operate the boiler unl the leak is
repaired.
Gas connecon 3/4 in. MNPT connecon
Gas Fing Connecon
1. If the system requires a 3/4 in. connecon,
aach the 1/2 in. FNPT x 3/4 in. MNPT
connecon ng to the gas ng on the
boom of the boiler.
2. Check the type of gas and gas supply
pressure before connecng the boiler. If
the boiler is not of the gas type that the
building is supplied with, converng the gas
type of the boiler is necessary. A gas
conversion kit is included with the boiler.
Refer to secon “14.5 Gas Conversion” in
the Appendix for gas conversion
instrucons.
3. Check gas supply pressure at the inlet test
port on the gas valve (see gure). Supplied
gas pressure must be within the limits
shown in secon “3.4 Specicaons” with
all gas appliances operang.
Rinnai M-Series Condensing Boiler Combi Manual 45
WARNING: If you do not follow these instructions EXACTLY, a fire or explosion
may result causing property damage, personal
injury or loss of life.
A. This appliance does not have a pilot. It is equipped with an ignition device which
automatically lights the burner. Do not try to light the burner by hand.
B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to
the floor because some gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS:
• DO NOT try to light any appliance.
• DO NOT touch any electric switch; DO NOT use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
C. Use only your hand to turn the gas control valve. Never use tools. If the gas control valve
will not turn by hand, don’t try to repair it, call a qualified service technician. Force or
attempted repair may result in a fire or explosion.
D. Do not use this appliance if any part has been under water. Immediately call a qualified
service technician to inspect the appliance and to replace any part of the control system
and any gas control which has been under water.
1. Set the temperature controller to the lowest setting.
2. Turn off all electric power to the appliance if service is to be performed.
3. Turn the manual gas control valve located at gas inlet of appliance clockwise to the
OFF position.
TO TURN OFF GAS TO APPLIANCE
1. STOP! Read the safety information above on this label.
2. Set the temperature controller to lowest setting.
3. Turn off all electric power to the appliance.
4. This appliance does not have a pilot. It is equipped with a direct ignition device which
automatically lights the burner. DO NOT try to light the burner by hand.
5. Turn the manual gas control valve located at gas inlet of appliance clockwise to the
OFF position.
6. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If
you smell gas, STOP! Follow “B” in the safety information above on this label. If you don’t
smell gas, go to the next step.
7. Turn the manual gas control valve located at gas inlet of appliance counterclockwise
to the ON position.
8. Turn on all electric power to the appliance.
9. Set the temperature controller to desired setting.
10. If the appliance will not operate, follow the instructions “To Turn Off Gas To Appliance”
and call your service technician or gas supplier.
OPERATING INSTRUCTIONS
FOR YOUR SAFETY READ BEFORE OPERATING
46 Rinnai M-Series Condensing Boiler Combi Manual
The gas supply must be capable of handling the enre
gas load required at the locaon. Gas line sizing is
based on gas type, the pressure drop in the system,
the gas pressure supplied, and gas line type. For gas
pipe sizing, refer to the Naonal Fuel Gas Code, ANSI
Z223.1/NFPA 54, or the Natural Gas and Propane
Installaon Code, CSA B149.1
For some tables, you will need to determine the cubic
feet per hour of gas required by dividing the gas input
by the heang value of the gas (available from the
local gas company). The gas input needs to include all
gas products at the locaon and the maximum Btu
usage at full load when all gas products are in use.
Use the table for your gas type and pipe type to nd
the pipe size required. Ensure the maximum input rate
o the DHW system is used for calculang the gas pipe
sizing. The pipe size must be able to provide the
required cubic feet per hour of gas or the required
Btu/hr.
The informaon below is provided as an example. The
appropriate table from the applicable code must be
used.
Instrucons: Enter values in empty boxes.
Rinnai Model Gas Input:
Addional Appliance Total Gas Input:
Heang Value of Gas:
Cubic Feet Per Hour (CFH):
ANSWER:
B
Btu/hr
C
Btu/
3
A
Btu/hr
(CFH) =
FT
3
/HR
CFH =
A + B
(CFH) =
C
GAS PIPE SIZING CALCULATION WORKSHEET
Natural Gas
Schedule 40 Metallic Pipe
Inlet Pressure: Less than 2 psi
Specic Gravity: 0.60
Informaon in table
obtained from NFPA 54,
ANSI Z223.1 - 2015.
Pressure Drop 0.5 in. w.c.
Nominal Pipe Size (in.)
1/2 3/4 1 1 1/4
Length in (meters) Capacity in Cubic Feet of Gas per Hour
10 (3) 172 360 678 1,390
20 (6) 118 247 466 957
30 (9) 95 199 374 768
40 (12) 81 170 320 657
50 (15) 72 151 284 583
60 (18) 65 137 257 528
70 (21) 60 126 237 486
80 (24) 56 117 220 452
90 (27) 52 110 207 424
100 (30) 50 104 195 400
EXAMPLE
Rinnai Model Gas Input:
Addional Appliance Total Gas
Input:
Heang Value of Gas:
Cubic Feet Per Hour (CFH):
ANSWER:
B
65,000
BTU/HR
C
1,000
BTU/FT
3
A
160,000
BTU/HR
160,000+65,000
(CFH) =
1000
225
FT
3
/HR
CFH =
For this example, the pipe
diameter must be at least 3/4 in.
pipe size and 10 (3 m) in
length.
A + B
(CFH) =
C
Rinnai M-Series Condensing Boiler Combi Manual 47
Pressure Drop 0.5 in. w.c.
Pressure Drop 3.0 in. w.c.
Schedule 40 Metallic Pipe
Inlet Pressure: Less than 2 psi
Specic Gravity: 0.6
Nominal Pipe Size (in.)
1/2 3/4 1 1 1/4
Length in (meters)
Capacity in Cubic Feet of Gas per Hour
10 (3)
454 949 1,790 3,670
20 (6)
312 652 1,230 2,520
30 (9)
250 524 986 2,030
40 (12)
214 448 844 1,730
50 (15)
190 397 748 1,540
60 (18)
172 360 678 1,390
70 (21)
158 331 624 1,280
80 (24)
147 308 580 1,190
90 (27)
138 289 544 1,120
100 (30)
131 273 514 1,060
Informaon in table
obtained from NFPA 54,
ANSI Z223.1 - 2015.
Informaon in table
obtained from NFPA 54,
ANSI Z223.1 - 2015.
Intended use: Inial
supply pressure of 8.0 in.
w.c. or greater.
Schedule 40 Metallic Pipe
Inlet Pressure: 11 in. w.c.
Specic Gravity: 1.50
Natural Gas
Propane (Undiluted)
Nominal Inside Pipe Size (in.)
1/2 3/4 1 1 1/4
Length in (meters) Capacity in Thousands of Btu/hr
10 (3) 291 608 1,150 2,350
20 (6) 200 418 787 1,620
30 (9) 160 336 632 1,300
40 (12) 137 287 541 1,110
50 (15) 122 255 480 985
60 (18) 110 231 434 892
80 (24) 101 212 400 821
100 (30) 94 197 372 763
EXAMPLE
Rinnai Model Gas Input:
Addional Appliance total Gas Input:
Heang Value of Gas:
Cubic Feet Per Hour (CFH):
ANSWER:
B
65,000
BTU/HR
C
1,000
BTU/FT
3
A
160,000
BTU/HR
160,000+65,000
(CFH) =
1000
225
FT
3
/HR
CFH =
For this example, the pipe diameter
must be at least 1/2 in. nominal
pipe size and 20 (6 m) in length.
A + B
(CFH) =
C
EXAMPLE
Rinnai Model Gas Input:
Addional Appliance Total Gas Input:
Total Gas Input:
ANSWER:
B
65,000
BTU/HR
A
160,000
BTU/HR
= BTU/HR
Total Gas
Input
225,000
For this example, the pipe diameter
must be at least 1/2 in. nominal
pipe size and 10 (3 m) in length.
Total
Gas
Input
= A + B
Total
Gas
Input
=
160,000+65,000
48 Rinnai M-Series Condensing Boiler Combi Manual
• The piping (including soldering materials)
and components connected to this
appliance must be approved for use in
potable water systems.
• Purge the water line to remove all debris
and air. Debris will damage the boiler.
• The boiler DHW must not be connected to
any piping or components previously used
with a non-potable water heang
appliance.
• Boiler water treatment and other toxic
chemicals must NOT be introduced into
the boiler DHW or connected potable
water piping.
• Ensure that the water lter on the boiler is
clean and installed.
• An approved pressure relief valve is
required by the American Naonal
Standard (ANSI Z21.13) and ASME Boiler
and Pressure Vessel Code, Secon IV
(Heang Boilers) for all water heang
systems and shall be accessible for
servicing. Refer to secon “8.7 Connect
the Pressure Relief Valves (DHW and
Central Heang)” for more informaon.
Aach the 1/2 in. FNPT x 3/4 in. MNPT
connecon ng to the hot and cold
ngs on the boom of the boiler.
To connect the water supply, follow the
instrucons below.
For standard installaons, refer to the Piping
Diagram for Basic DHW Installaon on the
next page.
Plumb the hot water supply line to the
DHW hot outlet connecon on the
boom of the boiler. Plumb the cold
water supply line to the DHW cold inlet
connecon on the boom of the boiler.
Water connecons to the boiler should
follow all state and local plumbing codes.
IMPORTANT
Topics in this secon
• Guidelines
• Instrucons
• Piping Diagram for Basic DHW Installaon
7
Hot water can cause rst degree burns with
exposure for as lile as:
• 3 seconds at 140°F (60°C)
• 20 seconds at 130°F (54°C)
• 8 minutes at 120°F (49°C)
Children, disabled, or elderly are at highest
risk of being scalded. Feel water before
bathing or showering.
Water temperatures
over 125°F (52°C) can
cause severe burns or
scalding resulng in
death.
DANGER
Hot and Cold Fing Connecons
Hot and Cold Valve Kit
Rinnai M-Series Condensing Boiler Combi Manual 49
This picture illustrates a suggested
arrangement. Some of the ngs
are oponal.
LEGEND
Cold Water Supply Line
Heang Return
Hot Water Supply Line
Condensate Drain Line
Sediment Filter (Recommended)
Mixing Valve
Heang Supply
Tempered Hot Water
Supply to Fixtures
This is not an engineering drawing; it is intended only as a guide and not as a replacement for professional engineering project drawings. This
drawing is not intended to describe a complete system. It is up to the contractor or engineer to determine the necessary components and
conguraon of the parcular system to be installed. The drawing does not imply compliance with local building code requirements. It is the
responsibility of the contractor or engineer to ensure the installaon is in accordance with all local building codes. Confer with local building
ocials before installaon.
50 Rinnai M-Series Condensing Boiler Combi Manual
• Purge the heang system to remove all
debris and air. Debris and air in the lines
will damage the boiler.
• When removing the plasc sealing caps
from the boiler connecons, water may
come out of the boiler due to live re
tesng during manufacturing.
• The boiler, when used in connecon with
a refrigeraon system, must be installed
so the chilled medium is piped in parallel
with the boiler with appropriate valves
to prevent the chilled medium from
entering the boiler.
• The boiler piping system of a hot water
boiler connected to heang coils located
in air handling units where they may be
exposed to refrigerated air circulaon
must be equipped with ow control
valves or other automac means to
prevent gravity circulaon of the boiler
water during the cooling cycle.
• Some installaons with mulple zone
valves may require a dierenal bypass,
which will prevent excessively high ow
rates through a single zone when the
other zone valves are closed.
To connect the water supply, follow the
instrucons below.
For standard installaons, refer to the “Piping
Diagram for Basic Central Heang
Installaon” in this chapter.
Aach the 3/4 in. FNPT x 1 in. MNPT
connecon ng to the supply and
return heang ngs on the boom of
the boiler.
Topics in this secon
• Guidelines
• Instrucons
• Common CH Components
• Piping Diagram for a Basic CH System
(With Hydraulic Separaon)
• Hydraulic Separaon
• Connect the Pressure Relief Valves
(DHW and CH)
• Connect the Condensate Drain Line
8
The boiler may not be installed directly to
a heang system where polybutylene or
other oxygen permeable piping is used.
Water connecons to the boiler should
follow all state and local plumbing codes.
IMPORTANT
• It is required to include an air separator
on the central heang supply of the
system.
• System piping should be insulated when
freezing is a potenal concern.
• All piping must comply with local, state,
naonal or ASME code as appropriate.
CAUTION
Supply and Return Fing Connecons
Rinnai M-Series Condensing Boiler Combi Manual 51
Plumb the heang supply and return
lines to the heang supply connecon
on the boom of the boiler. It is
required to use primary/secondary
piping to the heang system.
Listed below are common components in a
Central Heang system. Refer to the diagram
on the next page.
• Expansion Tank — A properly sized
expansion tank charged to 2 PSI (14 kPa)
below the cold system pressure is required
to limit pressure changes in the heang
system. When replacing an expansion tank,
consult the expansion tank manufacturer
for sizing.
• Air Separator — An air separator is needed
on the central heang supply side of the
system to remove any air that may be
present in the piping.
• Water Fill Valve — Maintains proper water
pressure in the central heang circuit.
• Pressure/Temperature Gauge — The
current pressure and temperature will
alternately be displayed on the boiler
control panel. A port for an external
gauge is present in the Primary-
Secondary Heang Kit accessory oered
by Rinnai.
• Pressure Relief Valve (PRV) — A PRV
located directly on the supply side of the
boiler is required. The PRV must be 3/4
in. with at least 30 PSI (207 kPa) and a
maximum of 45 PSI (310 kPa). A 30 PSI
(207 kPa) PRV is supplied with the boiler.
A port for the central heang PRV is
present in the Primary-Secondary Heang
Kit accessory oered by Rinnai.
• Oxygen Eliminaon — The boiler may
only be installed in a pressurized closed-
loop heang system, free of air and other
impuries. If using oxygen permeable
tubing in the central heang system, a
plate heat exchanger is necessary to
isolate the tubing and boiler.
• Low Water Cut O (LWCO) — This boiler
has a factory-installed pressure sensor
type LWCO. The boiler's internal LWCO is
not serviceable or adjustable. Check your
local codes to determine if an external
LWCO is required and if this device
conforms to the local code. If a LWCO is
required to be installed, the probe must
be located higher than the minimum safe
water level. When a LWCO is installed, it
must be wired back to the appropriate
terminal on the boiler PC Board.
• Back Flow Preventer — Use a back ow
preventer in the lling circuit to the
appliance as required by local code.
• Dirt Trap — Protects the boiler from
debris in the plumbing system.
Heang Supply and Return Connecon
Boiler with Primary Secondary Heang Kit
52 Rinnai M-Series Condensing Boiler Combi Manual
Pressure Relief Valve
(supplied with boiler)
Dirt Trap
Backow
preventer
Fill valve with
pressure gauge
Expansion
tank
Air separator
Pressure Gauge
(supplied with boiler)
Low Water
Cut O
(if required by
local code)
Ball valve
System
Supply
System
Return
CH System Common Components Diagram
Primary-Secondary
Heang Kit
Rinnai M-Series Condensing Boiler Combi Manual 53
This is not an engineering drawing; it is intended only as a guide and not as a replacement for professional engineering
project drawings. This drawing is not intended to describe a complete system. It is up to the contractor or engineer to
determine the necessary components and conguraon of the parcular system to be installed. The drawing does not
imply compliance with local building code requirements. It is the responsibility of the contractor or engineer to ensure
the installaon is in accordance with all local building codes. Confer with local building ocials before installaon.
Heat Emier
Thermostat
Outdoor
Sensor
Oponal Low Water Cut-O (LWCO)
This schemac shows an
example of a simple single zone
system with primary/secondary
piping by hydraulic separaon.
Purge Staon
IMPORTANT
This picture illustrates a suggested
arrangement. Some of the ngs
are oponal.
LEGEND
Pump Relay
54 Rinnai M-Series Condensing Boiler Combi Manual
Rinnai requires hydraulic separaon between the boiler and central heang system. Hydraulic
separators allow for no pump curve matching or ow calculaon; this is ideal for mul-temperature
and mul-zone systems.
Examples of Hydraulic Separaon
Closely spaced tees and low loss headers are common examples of hydraulic separators and can be
used to separate the boiler loop from the central heang loop.
Low Loss Header
Distance no
more than four
pipe diameters
IMPORTANT
For closely spaced tee installaons, the
separaon at the header is to be no
more than four pipe diameters.
Closely Spaced Tees
Boiler Supply
Boiler Return
Rinnai M-Series Condensing Boiler Combi Manual 55
An approved pressure relief valve is required
by the American Naonal Standard (ANSI
Z21.13) and ASME Boiler and Pressure Vessel
Code, Secon IV (Heang Boilers) for all water
heang systems and shall be accessible for
servicing (an approved pressure relief valve is
supplied with the boiler). When connecng a
pressure relief valve, follow the guidelines
below:
• The pressure relief valve must comply with
the standard for Relief Valves and
Automac Gas Shuto Devices for Hot
Water Supply Systems ANSI Z21.22, the
standard Temperature, Pressure,
Temperature and Pressure Relief Valves and
Vacuum Relief Valves, CAN1-4.4, and/or the
ANSI/ASME Boiler and Pressure Vessel Code,
Secon IV (Heang Boilers).
• The pressure relief valve must be rated up
to 150 psi for DHW systems, and to at least
the maximum Btu/hr of the appliance.
• The pressure relief valve must be rated up
to 30 psi for central heang systems, and to
at least the maximum Btu/hr of the
appliance.
• The discharge from the pressure relief valve
should be piped to the ground or into a
drain system per local codes.
• The pressure relief valve must be manually
operated once a year to check for correct
operaon.
• The discharge line from the pressure relief
valve should pitch downward and terminate
6 in. (152 mm) above drains where
discharge will be clearly visible.
An ASME 30 psi safety pressure relief
valve is included with the boiler and
must be ed before any shut o valve
in the system.
• DO NOT plumb the pressure relief
valve with the condensate drain;
both must be plumbed
independently to drain.
• DO NOT plug the pressure relief
valve and do not install any reducing
ngs or other restricons in the
relief line. The pressure relief line
should allow for complete drainage
of the valve and the line.
• DO NOT place any other valve or
shuto device between the pressure
relief valve and the boiler.
Water discharged from the pressure relief
valve could cause severe burns instantly or
death from scalds.
• The discharge end of the line shall be plain
(unthreaded) and a minimum of 3/4 in.
nominal pipe diameter. The discharge line
material must be suitable for water at
least 180° Fahrenheit.
• If a pressure relief valve discharges
periodically, this may be due to thermal
expansion in a closed water supply system.
Contact the water supplier or local
plumbing inspector on how to correct this
situaon. Do not plug the pressure relief
valve.
• The American Naonal Standard (ANSI
Z21.13) does not require a combinaon
temperature and pressure relief valve for
this appliance. However, local codes may
require a combinaon temperature and
pressure relief valve.
• Protect pressure relief valve and pressure
relief valve discharge line from freezing.
Do not plug or restrict ow of the pressure
relief valve.
WARNING
IMPORTANT
56 Rinnai M-Series Condensing Boiler Combi Manual
• Do not plumb the condensate drain
with the pressure relief valve; both
must be plumbed independently to
drain.
• All condensate must drain and be
disposed of according to local codes.
• Use only corrosion resistant materials
for the condensate drain lines such as
PVC pipe or plasc hose.
• The condensate drain pipe (along its
enre length) must be at least 1/2 in.
• Condensaon drain lines installed in
areas that are subject to freezing
temperatures should be wrapped with
an approved supplemental heat
source. Install per manufacturer’s
instrucons.
• Slope the condensate drain lines
toward the inside oor drain or
condensate pump.
• The end of the condensate drain pipe
should be open to the atmosphere.
The end should not be under water or
other substances.
• If the condensate drain pipe is closed or
stuck, the drain water will come out from the
side hole on the condensate drain pipe
connecon.
• If a oor drain is not available or the drain is
above the level of the condensate drain, a
condensate pump should be installed.
• A condensate neutralizer kit is available from
Rinnai. The kit allows condensate to ow
through neutralizing media that raises the
pH of the condensate to a level that will help
prevent corrosion of the drain and public
sewer system. Refer to secon “3.6
Accessories” for more informaon.
• The condensate drain pipe should be as short
as possible and have a downward pitch.
• Before operaon of the boiler, the
condensate collector must be lled with
water.
CORRECT
Pipe open to
atmosphere
Pipe submerged
in water
NOT
CORRECT
Water level
Refer to neutralizer Installaon Manual and local
codes for neutralizer installaon guidelines.
Image is for reference purposes only.
EXTERNAL TRAP
NOT REQUIRED
DO NOT
• DO NOT connect the condensate drain
line with an air condioning
evaporator coil drain.
• Boilers have an integrated condensate
trap. DO NOT install an external
condensate trap.
Neutralizer
Pipe open to
atmosphere
Rinnai M-Series Condensing Boiler Combi Manual 57
Connect the Condensate Drain Kit
Verify Contents
Item
#
Item Qty
a Elbow with exible pipe 1
b T-piece, elbow and exible pipe
assembly
1
c Flexible drain pipe 1
d Condensate drain inner tube 1
e Condensate drain outer tube 1
f Condensate collector cover 1
Mul-purpose grease or lubricant
Tools/Materials Required
Figure 1
Apply grease or lubricant
to top of o-ring
Reference Figure 1 for the following
instrucons.
1. Press and turn the assembly (3), with the
elbow rst, in the corresponding holes in the
boom plate of the boiler.
2. Press the black exible pipe (1) from inside
the boiler in the rubber T-piece (3).
3. Press the black rubber elbow with exible
drain pipe (1) on the condensate tray (2).
4. Lead the long black exible pipe (4) through
the free hole of the boiler frame and press it
in the T-piece (3).
5. Lead the other end of the exible pipe
outside the boiler to the drain.
6. Fill the condensate drain outer tube (5) with
150 ml (about 5 oz.) of water.
7. Apply mul-purpose grease or lubricant to
the top of the o-ring on the condensate drain
inner tube (6).
8. Insert the condensate drain inner tube (6)
through the hole in the boom plate of the
boiler into the condensate tray (2) of the
heat exchanger; you will hear a click when it
is fully seated. Next, insert the condensate
drain outer tube through the hole. Secure
the condensate drain out tube with the
securing clip (7) by turning it clockwise.
9. Press the sealing ring (8) around the outer
condensate tube and press/turn it in the
boom plate of the boiler.
Instrucons
58 Rinnai M-Series Condensing Boiler Combi Manual
IMPORTANT
• Do not use an extension cord or
adapter plug with the boiler.
• If an external electrical source is
ulized, the boiler, when installed,
must be electrically bonded to
ground in accordance with the
requirements of the authority having
jurisdicon or, in the absence of
such requirements, with the
Naonal Electrical Code, ANSI/NFPA
70, and/or the Canadian Electrical
Code Part I, CSA C22.1, Electrical
Code.
When connecng the power supply, follow
these guidelines:
• If using the 6.5 (2 m) power cord
(supplied with boiler), plug it into a
standard three-prong 120 VAC, 60 Hz
properly grounded wall outlet.
• The boiler requires 120 VAC, 60 Hz
power from a properly grounded
circuit.
• Do not rely on the gas or water piping
to ground the boiler. Ground locaons
are provided inside the boiler.
• The wiring diagram is located on the
inside of the boiler front cover.
• This boiler is supplied with 120 volts
and is equipped with a three-prong
(grounding) plug for your protecon
against shock hazard. The plug
should be plugged directly into a
properly grounded three-prong
receptacle. Do not cut or remove the
grounding terminal from this plug.
• Disconnect incoming power to the
boiler by removing the three-prong
plug before:
− Performing repairs or installaon
to internal components or
accessories.
− Making wiring connecons and/
or changes to the wiring
terminals on the boiler.
• No changes may be made to the wiring
of the boiler.
• All connecons should be designed in
accordance with the applicable
regulaons.
• Label all wires prior to disconnecon
when servicing controls. Wiring errors
can cause improper and dangerous
operaon.
• Verify proper operaon aer operaon
servicing.
A manually operated remote switch
should be located outside the boiler
room door for shung down the boiler.
Consideraon should be given to protect
the switch against tampering. If there is
more than one door to the boiler room,
a switch should be located at each door.
Topics in this secon
• Guidelines
• Electrical Connecons
• Post-Power Supply Connecon
Checklist
9
WARNING
CAUTION
CAUTION
Rinnai M-Series Condensing Boiler Combi Manual 59
□
Conrm that the electricity is supplied from a 120 VAC, 60 Hz power source and is in a
properly grounded circuit.
□
Conrm that an extension cord or adapter plug has NOT been used with the boiler.
□
Conrm connecon terminals are connected correctly.
Devices such as the room thermostat and outdoor temperature sensor are
connected to the connecon terminal. The connecon terminals are located on
the top and back of the controller.
To access the controller, remove the front panel (see secon “3.7 How to Remove
the Front Panel” for detailed instrucons).
120 V power supply to boiler
DO NOT USE
This terminal is for Rinnai-use only and
not for use in any installaon
System Pump Relay
Energized on a call for heat
Controller Top Connecons
External
safety
contact
Remove
jumper
to use
DO NOT
USE
Outdoor
temperature
sensor
DO NOT
USE
Room
thermo-
stat
(On/O
thermo-
stat or
control)
DO NOT
USE
For Rinnai
Use Only
For Rinnai
Use Only
For Rinnai
Use Only
DO NOT
USE
Not for
use in this
boiler
Controller Back Connecons
Controller
DO NOT USE
This terminal is for Rinnai-use only and
not for use in any installaon
60 Rinnai M-Series Condensing Boiler Combi Manual
Failure to properly commission the boiler as
described in this secon
may result in
unreliable and unsafe burner operaon and
reduced component life.
Boiler commissioning is a procedure used aer
boiler installaon to ensure the system and
boiler were installed correctly and ready for
operaon.
THIS SECTION IS INTENDED
FOR THE INSTALLER
This boiler must be commissioned by a
licensed professional. Installer qualicaons: A
trained and qualied professional must install
the appliance, inspect it, and leak test the
boiler before use. The warranty will be voided
due to any improper installaon. The trained
and qualied professional should have skills
such as: Gas sizing; Connecng gas lines, water
lines, valves, and electricity; Knowledge of
applicable naonal, state, and local codes;
Installing venng through a wall or roof; and
training in installaon of condensing boilers.
Training for Rinnai Condensing Boilers is
accessible online at
www.trainingevents.rinnai.us.
• Work on the boiler must be carried out
by a licensed professional, using
correctly calibrated instruments with
current test cercaon. The
commissioning instrucons are intended
for licensed professionals who have the
necessary knowledge and are approved
for working on heang and gas systems.
• The boiler and its individual shut o
valve must be disconnected from the gas
supply piping system during any
pressure tesng of that system at test
pressures in excess of 1/2 PSI (3.5 kPa).
• Before the boiler is red for the rst
me:
− Ensure the boiler and system are
fully de-aerated
− Purge the gas line between the gas
meter and boiler
− Prime the pump (as described in this
secon)
IMPORTANT
Topics in this secon
• Safety Precauons
• Instrucons
• Air Purge Process
10
WARNING
1. Remove the boiler front cover. See
secon “3.7 How to Remove the Front
Panel” for complete instrucons.
2. Locate the vent pump.
Step 1: Prime the Pump
You Will Need:
• Philips head screwdriver
• Flat head screwdriver
• Combuson analyzer (calibrated)
Pump
Rinnai M-Series Condensing Boiler Combi Manual 61
4. Use a at head screwdriver to
ensure the impeller spins freely.
3. Remove the vent pump screw.
5. When the impeller spins freely and water
exits though the vent port, the pump is
ready for operaon.
6. Replace the vent pump screw.
7. Proceed to the next step.
4. Scroll to ON and press OK.
5. Scroll to 100% and press OK.
6. The boiler is now at maximum input.
7. Aer the boiler has run for approximately
one minute, the O2 percentages displayed
on the combuson analyzer should match
the ranges shown in the table below.
If the ranges do not match, adjust the
parameters by following the steps in the
Adjust O2 Percentages secon.
• The O2 percentage seng is required to be
checked at commissioning, maintenance
and faults and adjusted if needed.
• Correct gas supply pressure must be
conrmed before tesng O2.
• The boiler front cover must be in place for
accurate ue gas tesng.
NOTICE
The O2 percentage is required to be checked
and adjusted aer a conversion from Natural
Gas to Liquid Propane, or from Liquid Propane
to Natural Gas. Seng the O2 at maximum
input must be performed with a calibrated
combuson analyzer that is set to the correct
gas type.
WARNING
Table: Nominal O2 Percentages
Step 2: Set the O2 at Maximum
Input
THIS SECTION IS INTENDED FOR THE
INSTALLER
MAXIMUM
INPUT
MINIMUM INPUT
Model
Natural
Gas
Liquid
Propane
Natural
Gas
Liquid
Propane
M060C 4.7 - 4.9 5.0 - 5.2
0.4-1.6%
Higher
Than
Observed
on
Maximum
Input
4.7-5.5
M090C 4.2 - 4.4 5.0 - 5.2
M120C 4.2 - 4.4 5.0 - 5.2
M160C 4.2 - 4.4 5.0 - 5.2
1. Put the boiler into operaon with a
maximum DHW or heat demand.
2. From the controller home screen, press and
hold the Chimney Acve buon for
approximately seven seconds.
3. Remove the plug covering the ue gas test
port and place the calibrated combuson
analyzer probe into the port (see right
image).
62 Rinnai M-Series Condensing Boiler Combi Manual
Step 3: Set the O2 at Minimum Input
1. While sll in service mode (as described in the previous step), use the scroll wheel to adjust to
0%.
2. Press OK.
3. The boiler is now at minimum input.
4. Aer the boiler has run for approximately one minute, the O2 value displayed on the
combuson analyzer should read a value as shown in the Nominal O2 Percentages table (see
secon Step 2: Set the O2 at Maximum Input).
Example: If maximum input value is 4.8% on natural gas, then minimum input value should be
between 5.2% and 6.4%.
If the values do not match, adjust the parameters by following the steps in the Adjust O2
Percentages secon.
5. When adjustments are complete, place the plug back into the ue gas test port.
6. On the controller, press and hold the Back buon unl the Home screen appears in the
window.
This secon is required only if it is necessary to adjust O2 percentages.
Rotate the screw on the gas valve assembly slowly. Allow the boiler to operate for approximately
one minute for the O2 value to stabilize. Repeat unl you reach the levels shown in the Nominal
O2 Percentages table (see secon Step 2: Set the O2 at Maximum Input).
• Rotate counter-clockwise to decrease the O2 percentage
• Rotate clockwise to increase the O2 percentage
Adjust O2 Percentages
INCREASE O2
DECREASE O2
Counter-Clockwise
Clockwise
THIS SECTION IS INTENDED FOR THE INSTALLER
Rinnai M-Series Condensing Boiler Combi Manual 63
The boiler comes equipped with an automac air purge process. This is a seven minute process
designed to eliminate air in the water. The air purge program will start whenever the water
pressure in the boiler gets below 10 PSI or when the boiler is powered on. The boiler will eliminate
air from the water through the air vent on the heat exchanger. A minimum of 19 PSI is needed to
complete the air purge process.
DO NOT bypass the air purge program during commissioning or if any part of the system has
been opened or disconnected. Failure to properly purge air from the boiler and system may
result in damage to the boiler, which is not covered by the boiler warranty.
To bypass the air purge process, press and hold the BACK buon for approximately seven seconds.
This will put the boiler back into normal operaon mode.
The boiler’s internal air purge process is an eecve method of purging air from the boiler aer the
system has been lled or serviced.
Do not bypass the air purge process during commissioning or if the system pressure has dropped
below 10 PSI. If there is any chance that air has entered the system, air purging is crical to prevent
damage to the boiler.
WARNING
64 Rinnai M-Series Condensing Boiler Combi Manual
Complete the following checklist when boiler installaon is complete. You should be able to answer
YES to each queson. If you answer NO, installaon is not complete. Refer to the applicable secon
in this manual for addional informaon.
INSTALLATION LOCATION YES NO
Have you veried the unit, vent and air intakes meet the clearance requirements?
VENTING YES NO
Have all corrosive compounds been removed from around the combuson air intake of
the boiler?
Have you followed the combuson air requirements to provide sucient combuson air
for the boiler?
Are the correct venng products for the installed model being ulized?
Have you installed the vent screen(s) for Schedule 40 PVC/CPVC vent applicaons if
applicable?
Have you veried the vent system does not exceed maximum length?
SYSTEM PIPING YES NO
Have the water lines been purged of all debris and the lter cleaned?
Have you veried the hot and cold water lines to the boiler are not interchanged?
Does the water supply to the boiler have adequate pressure? Is it free of chemicals? Did
you verify it does not exceed total hardness that will damage the heat exchanger?
Have you veried that no toxic chemicals were introduced to the potable water?
Did you drain the boiler if not intended to be used immediately?
Have water quality issues (if any) been addressed?
Have you performed the leak and pressure test for the boiler and plumbing system?
Are the isolaon valves installed? (for DHW systems only)
CONDENSATE DRAIN YES NO
If the condensate pump is installed, is it wired to deacvate the boiler in the event of
failure?
Did you verify the condensate drain pipe is as short as possible and has a downward
pitch toward the drain or condensate pump?
Is all condensate drained and disposed of as per local codes?
Did you use ONLY corrosion resistant materials for the condensate drain lines?
Did you verify the condensate drain pipe along its enre length is at least the same
diameter as the drain line?
Did you check to ensure the condensaon drain lines are protected from freezing?
Have you veried the condensate drain line is not plumbed with the pressure relief
valve?
11
Rinnai M-Series Condensing Boiler Combi Manual 65
GAS SUPPLY YES NO
Did you verify the gas system is appropriately sized?
Did you verify the boiler is rated for the gas type supplied?
Have you performed a gas line and connecon leak test?
Did you install a manual gas control valve in the gas line to the boiler?
When the boiler is in operaon, is the inlet gas pressure within limits?
Did you purge the gas line of any debris before connecng the boiler?
PRESSURE RELIEF VALVE (PRV)
YES NO
Does the PRV comply with the standard for Relief Valves and Automac Gas Shuto
Devices for Hot Water Supply Systems ANSI Z21.22, and/or the standard Temperature,
Pressure, Temperature and Pressure Relief Valves and Vacuum Relief Valves, CAN1-4.4?
Did you verify the DHW PRV is rated up to 150 psi and (at least) the maximum Btu/hr of
the boiler and the heang system PRV rated to 30 PSI?
Is the discharge from the PRV piped to the ground or into a drain system as per local
codes?
Is the discharge line from the PRV pitched downward and does it terminate 6 in. (152
mm) above the drains?
Is the discharge end of the line plain (unthreaded) and a minimum of 3/4 in. diameter?
Is the discharge line material suitable for at least 180° F water?
Did you take measures to protect the PRV and PRV discharge line from freezing?
Have you veried the PRV is not plumbed with the condensate drain line?
Have you veried the PRV is not plugged and that reducing ngs, valves, or other
restricons are not installed in the relief line?
POWER SUPPLY YES NO
Did you conrm that the electricity is supplied from 120 VAC, 60 Hz power source and is
in a properly grounded circuit?
Did you conrm that an extension cord or an adapter plug has NOT been used with the
boiler?
COMMISSIONING YES NO
Did you prime the pump?
Was the boiler lled to 17-26 PSI?
Was the air purge process performed on the boiler?
CONDENSATE DRAIN (Connued) YES NO
Have you conrmed the condensate drain line is not connected with an air condioning
evaporator coil drain?
This boiler has an integrated condensate trap. Have you veried that an external
condensate trap is not installed?
Have you conrmed the end of the condensate drain pipe is open to atmosphere?
Has an air gap been installed in the condensate drain line?
66 Rinnai M-Series Condensing Boiler Combi Manual
IMPORTANT
• On inial startup of the system, it is necessary to put the boiler into an air purge process to
remove all air from the system piping and boiler. The boiler will not immediately re up
and begin operaon. The boiler will go into an automac de-aeraon program that is
approximately 7 minutes in duraon.
• It can take up to a week before all the air has disappeared from a newly-lled and
pressurized installaon. During the rst week of operaon, noises can be heard which
indicate the presence of air. The automac air vent in the boiler and air separator in the
heang system will remove the air, which means the water pressure will reduce some
during this period; therefore, addional water is necessary to maintain proper pressure in
the heang system. Water pressure needed for operaon:
− The boiler is in normal operaon between 14 PSI and 43.5 PSI.
− Below 10.1 PSI, the boiler will have an error code (Fault 108 on the display) and be
blocked from operaon. Increasing the heang system water pressure will be necessary
for operaon.
− Between 10 PSI and 14 PSI, operaon will be limited to 80% (Alert Warning 1P4 will
appear on the display).
− Above 43.5 PSI, the boiler will have an error code (Fault 109 on the display) and be
blocked from operaon as the pressure is too high.
− The maximum pressure permied inside the heat exchanger is 45 PSI.
− The pressure relief valve supplied with the boiler is rated to 30 PSI.
Topics in this secon
• Start-Up Informaon
• Control Panel
• Basic Operaon Sengs
• Parameter Sengs
• Outdoor Reset Control
• Diagnosc Codes
• Forced High/Low Fire Modes
• Freeze Protecon
12
Rinnai M-Series Condensing Boiler Combi Manual 67
Slowly lower the protecve panel on the front cover to
access the control panel.
Control
panel
Power (On/O)
Press to turn the
boiler on or o.
(I = On O = O)
Selector Wheel
Turn the wheel
le or right to
scroll through
available menu
opons
Back
Press to go back one
screen.
Reset
Press to reset a fault
code.
See Reset Fault Code
secon (in this secon)
for more informaon
OK
Press to select an item.
Chimney Acve (Service Mode)
Press to enter into service mode
which allows adjustment of high
re/low re and O2 sengs.
See Chimney Acve (Service Mode)
secon (in this secon) for more
informaon
Boiler Display
Displays boiler status informaon.
See Boiler Display secon (next
secon) for more informaon
❶
❷
❸
❹
❺
❻
❼
❶
❷
❸
❹
❺
❻
❼
I
O
68 Rinnai M-Series Condensing Boiler Combi Manual
When the boiler is turned on, the main screen (also called the home screen) appears in the display.
Heang supply target temperature
DHW setpoint temperature
DHW status symbol
A box around the faucet symbol indicates
DHW is in operaon
Boiler status indicator, such as DHW is acve,
Central Heang is acve, error messages, and
other status informaon
Fire level status
Scale rises as the
temperature increases
HOT
COOL
Visual illustraon of current central
heang temperature
❶
❷
❸
❹
❺
❻
❼
❽
❾
❿
⓫
⓬
❶
❷
❸
❹
❺
❻
Central heang status symbol
A box around the radiator symbol indicates
central heang is in operaon
❼
❽
❾
❿
⓫
⓬
Current date and me
Outdoor temperature
Current central heang system water pressure
High re (maximum of six bars)
Low re
DHW comfort or economy mode is acve
DHW
IN OPERATION
Visual illustraon of current hot water temperature
Scale rises as the hot water
HOT
COOL
DHW NOT
IN OPERATION
CENTRAL HEATING IN OPERATION
CENTRAL HEATING NOT IN OPERATION
Rinnai M-Series Condensing Boiler Combi Manual 69
To change the language appearing on the boiler
display, follow the steps below.
1. From the controller Home screen, press OK.
2. Turn the selector wheel to highlight
Complete Menu. Press OK.
3. Turn the selector wheel to highlight Screen
Sengs. Press OK.
4. Language is
highlighted. Press
OK.
5. Turn the selector
wheel to highlight
the desired
language and press
OK.
6. The language is changed. To exit, press the
Back buon unl the Home screen appears
on the display.
To change the me and date appearing on the
boiler display, follow the steps below.
1. From the controller Home screen, press OK.
2. Turn the selector wheel to highlight
Complete Menu. Press OK.
3. Turn the selector wheel to highlight Screen
Sengs. Press OK.
4. Turn the selector wheel to highlight Time &
Date. Press OK.
5. Edit the following screen.
6. Press Save.
7. To exit, press the Back buon unl the
Home screen appears on the display.
To change the unit of measurements appearing
on the boiler display, follow the steps below.
1. From the controller Home screen, press OK.
2. Turn the selector wheel to highlight
Complete Menu. Press OK.
3. Turn the selector wheel to highlight Screen
Sengs. Press OK.
4. Turn the selector wheel to highlight System
measurement unit. Press OK.
5. Select Internaonal System or USA
System.
6. Press Save.
7. To exit, press the Back buon unl the
Home screen appears on the display.
NOTE
The Internaonal System selecon uses
°C and bar for temperature and pressure
values respecvely while the USA System
uses °F and PSI.
70 Rinnai M-Series Condensing Boiler Combi Manual
To turn the boiler on or o, press the Power
switch.
I = On O = O
From the controller Home screen, press
OK.
Turn the selector wheel to highlight
Complete Menu. Press OK.
CH Sengs is highlighted. Press OK.
CH Setpoint Temp is highlighted. Press OK.
Home
screen
2
3
4
1
Rinnai M-Series Condensing Boiler Combi Manual 71
The opon T set Z1 is highlighted.
Press OK.
Turn the selector wheel to unl the
desired target CH temperature appears
on the display. Press OK.
Available temperature sengs
(minimum to maximum): 68°F - 185°F
(20°C - 85°C)
Press the Back buon unl the Home
screen appears on the display.
5
6
7
NOTE: Z2 and Z3 are not acve
controls on this boiler.
From the controller Home screen, press
BACK.
Turn the selector wheel to the
desired DHW setpoint temperature.
The boiler will automacally save the
new setpoint temperature aer ve
seconds.
Home
screen
2
1
72 Rinnai M-Series Condensing Boiler Combi Manual
6
Comfort mode is a domesc hot water seng
that enables the boiler to re up more oen to
maintain the heat exchanger temperature. This
enables quicker delivery of hot water to xtures.
By default, comfort mode is always acve. To
disable or set schedule, follow the steps below
for Opon 2 or Opon 3.
Comfort mode has three opons:
Opon 1: Always Acve (Default)
This opon provides connuous hot water all
day long. The boiler maintains the primary heat
exchanger temperature to quickly deliver hot
water to the plate heat exchanger. This selecon
provides the quickest delivery of hot water to
hot water xtures, but uses the most energy.
Opon 2: Time Based
The boiler maintains the primary heat exchanger
temperature based o of me selecons. This
selecon requires more energy use than when
disabled, but not as much energy use as the
“Always Acve” opon.
Opon 3: Disabled
The boiler operates and produces hot water;
however, it will not maintain the primary heat
exchanger temperature for quicker hot water
producon. This selecon saves some energy,
but requires longer me to provide hot water to
the hot water xtures.
Always Acve
To enable the Always Acve comfort mode
seng, follow the steps below.
4
5
From the controller Home screen, press
OK.
Turn the selector wheel to highlight
Complete Menu. Press OK.
Home
screen
2
1
Turn the selector wheel to highlight DHW
Sengs. Press OK.
3
Turn the selector wheel to highlight
Comfort Funcon. Press OK.
Turn the selector wheel to highlight
Always Acve. Press OK.
Turn the selector wheel to highlight
Always Acve. Press OK.
The message below appears.
7
The Always Acve comfort mode is selected.
To exit, press the Back buon unl the
Home screen appears on the display.
Rinnai M-Series Condensing Boiler Combi Manual 73
6
Disabled
To disable Comfort mode, follow the steps
below.
4
5
From the controller Home screen,
press OK.
Turn the selector wheel to highlight
Complete Menu. Press OK.
Home
screen
2
1
Turn the selector wheel to
highlight DHW Sengs.
Press OK.
3
Turn the selector wheel to highlight
Comfort Funcon. Press OK.
Disabled is selected. Press
OK.
Comfort mode is disabled.
To exit, press the Back buon unl the
Home screen appears on the display.
The message below appears.
74 Rinnai M-Series Condensing Boiler Combi Manual
Time Based
4
5
From the controller Home screen,
press OK.
Turn the selector wheel to highlight
Complete Menu. Press OK.
Home
screen
2
1
Turn the selector wheel to highlight
DHW Sengs. Press OK.
3
Turn the selector wheel to highlight
Comfort Funcon. Press OK.
Turn the selector wheel to highlight
Time Based. Press OK.
The message below appears.
To enable the Time Based comfort mode
seng, follow the steps below.
7
8
6
Press the Back buon one me. The
following screen appears. Select Time
program.
Select one of the two opons:
• Free Time Programming—user-
dened mes for when comfort
mode is acve
• Preset programs—opons for preset
mes for comfort mode to be acve
DHW is selected. Press OK.
9
Turn the selector wheel to highlight
Set me program. Press OK.
10
Select the days with the same me
program. Use the selector wheel to
scroll to the day(s) you want the
same. Select "OK" on each day that
will have the same schedule.
Rinnai M-Series Condensing Boiler Combi Manual 75
PARA Default Range Descripon
2.0.0 140°F 104 - 140°F
DHW setpoint temp (also achieved by pressing BACK and
turning dial on home screen)
2.0.3 194°F 176 - 194°F
Max Water Temp (absolute max)
Will limit outdoor reset curve sengs
2.0.4 0 0-10,200 Will allow you to set higher than 10.2K but no eect
2.0.6 9°F/min 0-27°F/min How quickly boiler reaches setpoint from cold start
2.2.4 ON ON/OFF
AUTO funcon is the outdoor reset control. Changing this
to the o seng turns o outdoor reset and enables
simple setpoint CH supply temperature control. (Also
available from AUTO funcon in main menu (CH) or 4.2.1)
2.2.8
0 – Combi
2 – Solo
0=all Combi models
1=Solo boiler with 10KΩ NTC thermistor in DHW indirect tank
2=Solo boiler with aquastat in DHW indirect tank
2.4.9 0 -5 to +5°F
Outdoor reset temp sensor correcon
May need if outdoor reset is in direct sunlight, etc.
2.5.0 2
0=Eco (o)
1=Schedule
2=Comfort
DHW Comfort Mode
Also available from home screen (DHW)
2.5.7 1
0=OFF
1=ON
An-legionella Cycle (Solo models only)
2.6.0 OFF ON/OFF Acvates manual mode for component tesng
2.6.1 OFF ON/OFF Manual control of pump with burner o
2.6.2 OFF ON/OFF Manual control of fan with burner o
2.6.3 OFF ON/OFF Manual control of 3-way valve with burner o
2.7.0 OFF ON/OFF Forces chimney mode (same as buon)
2.7.1 OFF ON/OFF
Forces Air purge (or turn o – same as holding BACK for 7
seconds)
Boiler Parameters
76 Rinnai M-Series Condensing Boiler Combi Manual
PARA Default Range Descripon
2.8.0 NA
OK=YES
ESC=NO
Resets all parameters to factory defaults
(green buon)
2.9.0 1
0=NO
1=NC
External Safety contact (LWCO, etc)
(NOTE: DO NOT USE OPTION 2)
2.9.1 1
0=OFF
1=ON
System (plant) frost protecon, pump operaon based
on outdoor temp sensor value
PARA Default Range Descripon
4.2.0 1
0=Low Temp
1= High Temp
Outdoor reset curve presets
4.2.1 3
0=OFF
3=ON
Thermoregulaon: outdoor temperature reset
Also available from AUTO funcon in main menu (CH)
or 2.2.4
DO NOT USE 1,2, or 4
4.2.2
LT=0.8
HT=2.0
LT=0.2-1.0
HT=1.0=3.5
Slope of outdoor reset curve (see separate slides),
depends on 4.2.0 seng
4.2.3 0
Depends on
curve sengs
Heang curve oset (parallel shi)
4.2.5
LT=122°F
HT=185°F
LT=68-122°F
HT=68-185°F
Maximum supply temp (°F)
4.2.6 68°F
LT=68-122°F
HT=68-185°F
Minimum supply temp (°F)
PARA Unit Descripon
8.0.1 Hours Total pump hours
8.0.3 Hours Total hours boiler on power (electricity)
8.0.4 Hours Total fan hours
8.0.5 Cycles Total fan cycles
8.0.6 Cycles Total CH ame ignions
8.0.7 Cycles Total DHW ame ignions
Heang Parameters
Service Parameters
Rinnai M-Series Condensing Boiler Combi Manual 77
PARA Unit Descripon
8.0.7 Cycles Total DHW ame ignions
8.1.0 Hours Total CH burner hours
8.1.1 Hours Total DHW burner hours (add w/CH for absolute total)
8.1.2 Occurrence Total number of ame faults
8.1.3 Cycles Total ignion cycles
8.2.1 OFF/ON PCB signal if fan is ON or OFF
8.2.2 RPM Fan speed
8.2.3 0-100% Pump speed
8.2.4 3-way valve posion 0=DHW, 1=CH
8.2.5 l/min DHW rate (note this is in liters mulply by .264 for GPM)
8.2.7 % Pump modulaon (will never read above 90%)
8.2.8 kW Boiler power during operaon (mulply by 3412 for BTU)
8.2.9 PSI Actual PSI (also on home screen)
8.3.0 °F CH Flow Setpoint, also called T-set
8.3.1 °F T1 (Supply temp)
8.3.2 °F T2 (Return temp)
8.3.3 °F T3 combi (DHW temp)
8.3.5 °F Outdoor temp sensor (also on home screen)
8.4.0 °F Indirect tank temp
8.5.0 Months Maintenance frequency
8.5.1 ON/OFF Maintenance frequency acvaon
8.5.2 0/1 Maintenance frequency reset
8.5.4 Soware Version (display board)
8.5.5 Soware version (main PCB)
8.7.5 Flame Rod Current
78 Rinnai M-Series Condensing Boiler Combi Manual
Change the Altude
From the controller Home screen, press
the BACK and OK buons at the same
me for 7 seconds.
Turn the selector wheel so that 007
appears as the technical code.
Turn the selector wheel to highlight
Complete Menu. Press OK.
Home
screen
2
3
1
To follow is an example of how to adjust parameters on the M-Series Boiler.
The “007” Menu is where all parameters can be
adjusted.
All commonly adjusted parameters can be
accessed in the Complete Menu.
Turn the selector wheel to highlight
2 Boiler Parameters. Press OK.
4
The rst digit shown is the rst value in the
parameter address in the table to follow.
Rinnai M-Series Condensing Boiler Combi Manual 79
Opon 2.0 General is highlighted.
Press OK.
Turn the selector wheel to highlight
2.0.4 Altude. Press OK.
5
6
Press the Back buon unl the Home
screen appears on the display.
Scroll to the desired altude and
press OK.
Note: Altude is displayed in Feet (FT)
measurements.
7
8
The parameter had now been updated to the
set value.
80 Rinnai M-Series Condensing Boiler Combi Manual
North Facing Wall
Outdoor Temperature
Sensor
Outdoor reset is a built-in funcon to help maximize the eciency of the boiler. The design of this
funcon is to adjust the target temperature of the boiler relave to the outdoor ambient
temperature via the four outdoor reset curve opons included in the boiler parameters. The
outdoor ambient temperature is observed via the provided outdoor temperature sensor.
The outdoor temperature sensor should be mounted on a North facing wall of the house below an
eave to avoid direct sunlight (to prevent obtaining a false reading of the outdoor temperature). The
sensor should also be mounted away from any vent, duct, or other device that may create an
arcial heat source. The sensor should then be wired back to the outdoor temperature sensor
terminal on the boiler. Refer to the following secons for more informaon.
Rinnai M-Series Condensing Boiler Combi Manual 81
1. Remove the boiler’s front panel by removing the four screws that secure the panel.
2. Locate the HMI at the boom of the unit.
3. Connect the outdoor sensor to the terminals shown.
4. Set parameters 4.2.0-4.2.6 as appropriate for your applicaon (see secon “12.4.1 Parameter
Sengs Table” for more informaon).
Outdoor
Temperature Sensor
The boiler comes equipped with several outdoor reset curves, which are dierent target
temperature lines dependent on the outdoor temperature. The selected curve should be based o
of the type of heat emier and the target temperature desired. The steeper the curve (higher the
value) the quicker the system will come up to temperature. The high temperature curve is default.
It is recommended to use this for all applicaons except in-oor/slab radiant.
82 Rinnai M-Series Condensing Boiler Combi Manual
Type of Heat Emier Typical Minimum Supply
Temperature
Typical Maximum Supply
Temperature
Hydronic Air Handler 120 - 140°F 140 - 180°F
Unit Heater 130 - 140°F 160 - 180°F
Base Board convectors 100 - 140°F 140 - 190°F
Cast Iron / Panel Radiator 90 - 120°F 140 - 180°F
Undermount Radiant 100 -120°F 120 - 150°F
Poured concrete radiant 80 - 90°F 110 - 130°F
*NOTE: These are basic guidelines. Please check with manufacturer of emier or consult your
heang design engineer.
Below are some typical target temperatures for various heat emiers.
Key Outdoor Reset Parameters
Parameter
Address
Descripon Value
4.2.0 Curve Presets 1=High temperature, (all apps except in-oor (slab) radiant
applicaons)
2= Low temperature, (in-oor) slab radiant apps
4.2.2 Slope High value = steep slope
Low value = gradual slope
4.2.5 Maximum
temperature
Raises / lowers maximum target supply temperature
4.2.6 Minimum
temperature
Raises / lowers minimum target supply temperature and
outdoor reset curve.
Below are parameter locaons and explanaons of outdoor reset parameters that will need to be
adjusted upon installaon.
Rinnai M-Series Condensing Boiler Combi Manual 83
WARNING
Some of the checks below should be performed by a licensed professional.
Consumers should never aempt any acon that they are not qualied to
perform.
Code Descripon Reason(s)
Where Error
is Occurring
How to Resolve
101 Overheat • The supply or return water temperature
is greater than 212°F for 3 seconds.
• The return water temperature is within
9°F of the supply temperature is not
achieved within 2 minutes with pump
running on call for heat.
• The supply and return probe check failed
CH
Operaon
Press the Reset
buon
102 Pressure
Sensor
Damaged
The pressure sensor has a short or open
circuit
CH
Operaon
Troubleshoot
the pressure
sensor
103 Flow Check
Failed 3 Times
Three ow checks failed within 15 minutes.
1P1 (Flow Check 1 Failed) was the last error
detected.
CH
Operaon
Press the Reset
buon
104 Flow Check 2
Failed
More than 27°F per second change in supply
or return water temperature
CH
Operaon
Press the Reset
buon
105 Flow Check
Failed 3 Times
Three ow checks failed within 15 minutes.
1P3 (Flow Check 4 Failed) was the last error
detected.
CH
Operaon
Press the Reset
buon
106 Flow Check
Failed 3 Times
Three ow checks failed within 15 minutes.
1P4 (Filling Needed) was the last error
detected.
CH
Operaon
Press the Reset
buon
107 Flow Check 5
Failed
The return water temperature is more than
63°F higher than the supply water
temperature and the burner is on.
CH
Operaon
Press the Reset
buon
108 Supply
Pressure is
below
Minimum
Pressure
• The supply pressure is below minimum
pressure and the burner is on.
• The burner is o with the supply pressure
below the minimum pressure and air
purge is acve for 40 seconds.
CH
Operaon
Raise the supply
pressure above
the minimum
pressure
109 Supply
Pressure is
above
Maximum
Pressure
The supply pressure is above the maximum
pressure.
CH
Operaon
Lower the
pressure to 4.3
PSI below the
maximum supply
pressure. Verify
proper operaon
of the PRV.
110 Send Probe
Damaged
The supply sensor has a short or open circuit. CH
Operaon
Troubleshoot
the supply
sensor
112 Return Probe
Damaged
The return sensor has a short or open circuit. CH
Operaon
Troubleshoot
the return
sensor
114 Outdoor
Probe
Damaged
The outdoor sensor is installed and has a
short or open circuit.
CH
Operaon
Troubleshoot
the outdoor
sensor
When the boiler detects an error, a 3-digit blocking or fault code appears on the controller display.
• A blocking code is a temporary error that can be automacally corrected by the boiler.
• A fault code requires the error to be reset and/or corrected for the boiler to go back into a
normal operang mode. In the table below, fault codes are labeled with “Press the Reset
buon” in the “How to Resolve” column.
An overview of the most common blocking and fault codes are listed below.
84 Rinnai M-Series Condensing Boiler Combi Manual
Code Descripon Reason(s) Fault Locaon How to Resolve
1P1
Flow Check 1
Failed
Change in supply temperature
of 12.6°F to 27°F in one second
Central Heang
operaon
The boiler will aempt
to correct for 10
seconds
1P2
Flow Check 3
Failed
The supply water temperature is
more than 99°F higher than the
return water temperature
Central Heang
operaon
The boiler will aempt
to correct for 10
seconds
1P3
Flow Check 4
Failed
The return water temperature is
18°F higher than the supply
water temperature
Central Heang
operaon
The boiler will aempt
to correct for 10
seconds
1P4 Filling Needed
Supply pressure is below the
warning pressure
Central Heang
operaon
Raise the supply
pressure above the
minimum pressure
201
Combi Domesc
Hot Water NTC
Damaged
The Domesc Hot Water sensor
has a short or open circuit
Domesc Hot
Water operaon
Troubleshoot the
Domesc Hot Water
sensor
203
Tank NTC Sensor
Damaged
The tank probe has a short or
open circuit
Domesc Hot
Water operaon
Troubleshoot the tank
probe
303 PC Board Fault
PC Board soware or hardware
error
PC Board Press the Reset buon
304 Too Many Reset
The Reset buon was pressed
more than 5 mes in 15 minutes
PC Board
Wait for 15 minutes to
elapse without pressing
the Reset buon
306 PC Board Fault PC Board error PC Board Press the Reset buon
309
Gas Relay Check
Failed
Flame detected for 3 seconds
aer the gas valve closed
PC Board Press the Reset buon
3P9
Scheduled
Maintenance-
Call Service
The maintenance mer has
expired
PC Board
Reset the monthly
mer for the next
maintenance interval
reminder
501
No Flame
Detected
Flame not detected
Flame ignion/
detecon
Press the Reset buon
502
Flame Detected
with Gas Valve
Closed (False
Flame)
Flame detected before the gas
valve opened
Flame ignion/
detecon
Troubleshoot the ame
rod, igniter, electrode,
and gas valve
504 Flame Li
Loss of ame during burner
operaon
Flame ignion/
detecon
Press the Reset buon
5P1 1stIgnit Failed
Flame not detected during the
rst ignion aempt
Flame ignion/
detecon
Fault will go away at the
end of the second
ignion aempt
5P2 2ndIgnit Failed
Flame not detected during the
second ignion aempt
Flame ignion/
detecon
Fault will go away at the
end of the third ignion
aempt
5P3 Flame Li
Loss of ame during burner
operaon
Flame ignion/
detecon
Fault will go away with
proper ignion
612 Fan Error Fan speed is too high or too low Fan/Vent Press the Reset buon
1P9
Water Pressure
Dynamic Check
No pressure change aer 5
seconds of running the pump
Central Heang
operaon
The boiler will check the
pressure for 30 seconds
and the error will go
away with proper inlet
pressure
140
Water Pressure
Dynamic Check
Two 1P9 water pressure checks
failed
Central Heang
operaon
Press the Reset buon
Rinnai M-Series Condensing Boiler Combi Manual 85
When an error occurs, the fault code
and descripon appear on the display.
The following message appears:
Do you really want to perform the
reset?
• Press OK to reset the error
• Press the ESC keyboard buon to
cancel reset and return to the
previous screen
To reset the fault code, press the
RESET buon.
The Reset in Progress message
appears.
The Fault Solved message appears.
Aer the code is reset, the Home
screen automacally appears.
1
2
3
4
5
6
86 Rinnai M-Series Condensing Boiler Combi Manual
From the controller Home screen,
press the BACK and OK buons at the
same me for 7 seconds.
Turn the selector wheel so that 007
appears as the technical code.
Turn the selector wheel to highlight
Complete Menu. Press OK.
Turn the selector wheel to highlight
8 Service Param. Press OK.
Home
screen
2
3
4
1
5
Turn the selector wheel to highlight
8.6 Error History. Press OK.
6
Opon 8.6.0 Last 10 Errors is highlighted.
Press OK.
7
Scroll to view the last 10 errors.
Error
descripon
Error number
Time and date when
error occurred
Rinnai M-Series Condensing Boiler Combi Manual 87
Chimney Acve (Service Mode)
The Chimney Acve (service mode) buon puts the boiler into service mode which allows
adjustment of high re/low re and O2 sengs. To enter Chimney Acve (service mode):
From the controller Home screen,
press and hold the Chimney Acve
buon for approximately 7 seconds.
Chimney Acve (service mode) defaults
to 100%.
Use the selector wheel to adjust
between 0% to 100% and then press
OK.
• 0% (boiler will run on low re/low
load)
• 100% (boiler will run on maximum
re/full load)
To exit Chimney Acve (service mode),
press the Back buon unl the Home
screen appears on the display.
The following screen appears
indicang that Chimney Acve
(service mode) is acve.
This secon should be performed by a licensed professional. Consumers
should never aempt any acon that they are not qualied to perform.
WARNING
1
3
2
4
Home
screen
88 Rinnai M-Series Condensing Boiler Combi Manual
When the system needs to be shutdown for extended periods of me, the boiler and all system
piping should be drained. The power and gas supply should then be disconnected from the boiler.
Freezing damage may occur if there is water remaining in the boiler or system piping. The plumbing
lines should also be blown out via compressed air.
The boiler is equipped with two dierent methods of freeze protecon, one for the boiler itself and
one for the system.
If the Supply Temperature thermistor, T1, observes a temperature less than 47°F, the boiler pump
will run for 2 minutes. The internal three way valve will alternate every minute to ensure
circulaon through both the primary heat exchanger and the plate heat exchanger. If T1 observes a
temperature less than 39°F, the burner will re for 30 seconds or unl the T1 sensor observes a
temperature higher than 47°F. This feature cannot be disabled.
If the outdoor sensor observes a temperature between 25°F and 35°F, the boiler will operate for 10
minutes every 6 hours. If the outdoor sensor observes a temperature of 24°F or less, the boiler
pump will run connuously. This feature can be disabled via parameter 2.9.1.
Rinnai M-Series Condensing Boiler Combi Manual 89
13
• Maintenance is required to
maintain safe operaon of the
boiler.
• The boiler must be inspected
annually by a licensed professional.
Repairs and maintenance shall be
performed by a licensed
professional. The licensed
professional must verify proper
operaon aer servicing.
• Keep the boiler area clear and free
from combusble materials,
gasoline, and other ammable
vapors and liquids.
• To protect yourself from harm,
before performing maintenance:
− Turn o the electrical power
supply by unplugging the
power cord or by turning o
the electricity at the circuit
breaker. (The boiler controller
does not control the electrical
power.)
− Turn o the gas at the manual
gas control valve, usually
located immediately below
the boiler.
− Turn o the incoming water
supply. This can be done at
the isolaon valve
immediately below the boiler
or by turning o the water
supply to the building.
Topics in this secon
• Owner Maintenance
• Licensed Professional Maintenance
• Test the Ignion Safety Shut O
Device
If you encounter a problem that is
dicult to solve, stop the operaon
and immediately contact a licensed
professional.
MONTHLY
Boiler Area
• Verify the area is free of combusble
materials, gasoline and other
ammable vapors and liquids.
• Verify the area is clean from dust and
obstrucons
• Verify the air intake area is free of any
contaminants listed in the boiler
Installaon and Operaon Manual.
Any contaminants in the boiler intake
air vicinity must be removed. If they
cannot be removed, contact a licensed
professional.
Piping
• Inspect all water, gas, and
condensaon piping for leaks. Look
for signs of leaking lines or corrosion.
• Conrm the condensaon line is not
blocked. If a condensaon drain pump
is used, conrm the condensaon
drain pump operates correctly.
Venng
• Verify the boiler vent discharge and
air intake is clean and free of
obstrucons.
• Check for leakage, damage, or
deformaon of venng.
Boiler
• Verify the boiler is free from any
abnormal situaons, such as
diagnosc error codes, loud noises,
leakage or other potenal issues.
• Check that the pressure on the
controller display or external pressure
gauge indicates 19-43.5 psi.
WARNING
WARNING
90 Rinnai M-Series Condensing Boiler Combi Manual
TWO YEAR SERVICE
Vent System • Inspect for blockages or damage.
• Inspect vent screen or room air lter (if using) for debris and blockages. Clean
if needed.
Fan and Motors Clean dust and dirt from fan and motor (motors are permanently lubricated and
do not require lubricaon).
Controller Check diagnosc code history.
Pressure Conrm the pressure is within the proper range (between 17-26 PSI). If the
pressure is lower than the specied range, add water unl in the proper range.
Pressure Relief
Valve
Operate the pressure relief valve manually once a year. In doing so, it will be
necessary to take precauons with regard to the discharge of potenally scalding
hot water under pressure. Ensure discharge has a safe place to ow. Contact
with your body or other property may cause damage or harm.
Expansion Tank Perform annual checks as recommended by the manufacturer to ensure proper
operaon.
Condensaon
Trap
Check if the trap contains sediment. To remove sediment, unplug the boom of
the condensate trap. Remove the sediment, and then return the plug. Do not use
a wrench to ghten the condensate drain as this could cause the connecon to
break.
Condensaon
Drain
• Conrm the condensaon drain line is not blocked or clocked.
• Ensure the condensaon drain pump (if ulized) is working correctly.
Draining Water When the system will be shutdown for a long period of me (seasonal
shutdown), close the shuto valves below the boiler and drain the boiler to
protect it from potenal freeze damage.
Water Quality Conrm the water quality. Refer to secon “4.4.1 Water Quality Guidelines” to
determine if the water needs to be treated or condioned. DHW must be
potable, free of corrosive chemicals, sand, dirt, or other contaminates. It is up to
the installer to ensure the water does not contain corrosive chemicals or
elements that can aect or damage the heat exchanger. Water that contains
chemicals exceeding the levels required aect and damage the heat exchanger.
Replacement of the heat exchanger due to water quality damage is not covered
by the warranty.
Tesng the pressure relief valve should only be
performed by a licensed professional. Water
discharged from the pressure relief valve could cause severe burns
instantly or death from scalds.
WARNING
Rinnai M-Series Condensing Boiler Combi Manual 91
AFTER SERVICING: VISUAL INSPECTION OF FLAME
Verify proper operaon aer servicing. The burner must ame evenly over the enre surface when
operang correctly. The ame must burn with a clear, blue, stable ame. See the parts breakdown
of the burner for the locaon of the view ports. The ame paern should be as shown in the
images below:
SATISFACTORY
FRONT VIEW
BLUE FLAME
FLAME ROD
FLAME ROD
UNSATISFACTORY
FRONT VIEW
Snow
Accumulaon
• Verify the area around the ue terminal is free of snow and ice. The boiler will
not funcon properly if the combuson air or exhaust vent pipes are impeded
(blocked or parally blocked) by obstrucons.
• Verify the condensate drain line is free of snow and ice. Ensure the line is not
blocked or clogged and that condensate is owing freely.
Freeze
Protecon
• Freeze protecon for new or exisng systems must use glycol that is specially
formulated for this purpose. This includes inhibitors, which prevent the glycol
from aacking the metallic components. The glycol should be for mul-
metallic components. Reference secon “14.1 Approved Cleaners, Inhibitors
and Anfreezes” in the Appendix for an approved list of system cleaners,
inhibitors, and anfreezes.
• Check that the system uid is correct for the glycol concentraon and inhibitor
level. The system should be tested at least once a year and as recommended
by the producer of the glycol soluon. The allowed maximum concentraon is
50 percent.
Coast Area
Installaons
Installaons located in or near coastal areas may require addional maintenance
due to corrosive airborne ocean salt. If corrosion is observed on the body of the
boiler, the boiler shall be inspected to ensure proper operaon and repaired or
replaced, if necessary.
Cleaning
It is imperave that control compartments, burners, and circulang air
passageways of the boiler be kept clean. Check burner ame for proper color.
Once ignited, the ame must cover the surface of the burner. The ame must
burn with a clear, blue, stable ame. If the ame does not have this appearance,
complete the following steps:
• Turn o and disconnect electrical power. Allow to cool.
• Remove the front panel.
• Use a vacuum to remove dust from the main burner and fan blades. Do not
use a wet cloth or spray cleaners on the burner. Do not use volale
substances such as benzene and thinners; they may ignite or fade the paint.
• Do not open the burner cabinet and touch the burner surface.
Condensate Trap Cleaning:
• Inspect the condensate drain assembly inside the boiler and your external
drain system.
• Remove any debris that may be present in the condensate removal system.
YELLOW OR GREEN FLAME
92 Rinnai M-Series Condensing Boiler Combi Manual
1. Ensure the boiler is not currently ring and the ame rod is not hot.
2. Remove the boiler front panel.
3. Disconnect the wiring connecon from the ame rod (located on the le side of the boiler).
Do not touch the inside of the wiring connecon while it is disconnected.
WARNING
Boiler le side
Remove the wiring connecon
4. On the control panel, press and hold the
Service Mode buon for approximately
7 seconds.
5. The boiler iniates one start-up aempt and four restart aempts.
Aer the last start-up aempt, the boiler locks out and the gas valve shuts o. Code 501 No
Flame Detected appears on the controller display.
6. Reconnect the wiring connecon to the ame rod. Be careful not to touch the inside of the
wiring connecon.
7. Press the RESET buon on the control panel.
8. The boiler should start up. If the boiler does not start up, contact Rinnai Customer Care at
1-800-621-9419.
9. Replace the boiler front panel.
Rinnai M-Series Condensing Boiler Combi Manual 93
Approved System Cleaners:
• Fernox F3 Cleaner
• Noble Noburst Hydronic System Cleaner
• Rhomar Hydro-Solv 9100
• Sennel X400
Approved System Inhibitors:
• Noble Noburst AL Inhibitor
• Rhomar Pro-tek 922
• Sennel X100
Approved System Anfreezes:
• Chem Frost 100%
• Fernox Alphi 11
• Hall-Chem Solar II
• Noble Noburst AL
• Rechochem Recofreeze AL
• Rhomar RhoGard Mutli-Metal (AL safe)
• Sennel X500
Below is a list of approved system cleaners, inhibitors, and anfreezes for use in hydronic plumbing
systems ulizing Rinnai boilers.
IMPORTANT
• If replacing a boiler, add system cleaners while the old boiler is installed and operate the old
boiler for heang for several days to most eecvely clean the system.
• The Rinnai boiler must be closed o (valved o) from the rest of the system, or not
connected, while cleaners are in the system.
• When cleaning is complete, drain the system and then ush with clean water to remove any
sediment.
14
94 Rinnai M-Series Condensing Boiler Combi Manual
When replacing an exisng boiler, the
heang system shall be ushed with an
approved system cleaner before the new
boiler is added to the system. If the old
boiler has already been removed, a bypass
must be piped in when the new boiler is
installed to facilitate the ushing of the
system.
The Rinnai boiler must be isolated from the
system while the system is ushed. No
system cleaner should ever enter the boiler
heat exchanger due to its causc nature
which could damage the heat exchanger.
Reference secon “14.1 Approved
Cleaners, Inhibitors and Anfreezes” in the
Appendix for an approved list of system
cleaners, inhibitors, and anfreezes.
Instrucons
1. Flush the CH system with water.
2. Isolate the boiler from the CH system.
3. Fill the CH system with an approved
cleaner and circulate through the system.
4. If the installaon is a zone system (ulizes
mulple zones), ush out each zone
individually.
5. Flush the CH system with water again,
ensuring all zones have been ushed.
6. Clean out the dirt trap per manufacturer’s
instrucons.
7. The boiler and system may now be lled
through the ll valves.
8. If using glycol, ensure it is an approved
glycol and rao.
9. Verify water quality is within the stated
values in secon “4.4.1 Water Quality
Guidelines.”
IMPORTANT
• Water should be within guidelines for
water quality listed in secon “4.4.1
Water Quality Guidelines.”
• Use the proper water treatment to
ensure the pH and water hardness are
within the Rinnai boiler water quality
guidelines listed in secon “4.4.1 Water
Quality Guidelines.”
• Test the pH of the water that will be
used for lling the system.
Rinnai M-Series Condensing Boiler Combi Manual 95
Boiler Casing
Item # Descripon Part Number Quanty
M060C M090C M120C M160C
10 Boiler Mounng Bracket 809000161 1 1 1 1
12 Front cover 809000145 1 1 1 1
13 Screw M5 x 12 mm 809000019 2 2 2 2
14 Hinge 809000146 2 2 2 2
50 2-pipe adapter 802000005 1 1 1 1
51 3 in. PVC adapter 802000006 2 2 2 2
53 Measurement port plug 808000024 1 1 1 1
54 Gas valve screw plug 809000148 1 1 1 1
55 3/5” Concentric Adapter 802000008 1 1 1 1
56 2” Flue Adapter 802000007 1 1 1 1
50
96 Rinnai M-Series Condensing Boiler Combi Manual
Heat Exchanger
Rinnai M-Series Condensing Boiler Combi Manual 97
Item # Descripon Part Number Quanty
M060C M090C M120C M160C
30 Screw M5x16 809000015 2 2 2 2
31 Gasket 808000037 1 1 1 1
32 Burner hood
806000035 1 - - -
806000036 - 1 1 1
33 Gasket kit
806000037 1 - - -
806000038 - 1 1 1
34 Burner
806000032 1 - - -
806000033 - 1 1 1
36 Electrode gasket 805000062 1 1 1 1
37 Heat exchanger
807000169 1 - - -
807000170 - 1 1 1
38 Condensate tray gasket
807000135 1 - - -
807000136 - 1 1 1
39 Condensate tray
807000137 1 - - -
807000138 - 1 1 1
40 Stainless Steel Screw M6x12 809000163 2 2 2 2
41 Condensate trap latch 807000139 1 1 1 1
42 Flue gasket 802000002 1 1 1 1
43 Exhaust vent box 802000003 1 1 1 1
44 Flue/condensate tray gasket 802000004 1 1 1 1
46 De-aerator 807000024 1 1 1 1
47 Clamp bar 809000147 2 2 2 2
48 Silencer 808000038 1 1 1 1
49 Silencer gasket 808000039 1 1 1 1
99 Water control assembly retenon clip 807000160 6 6 6 6
110 Allen head bolt M5 x10 mm 809000150 4 4 4 4
132
808000035 1 - - -
Fan/venturi
808000036 - 1 1 1
143 Ignion/Electrode assembly 805000059 1 1 1 1
144 Igniter cable 805000066 1 1 1 1
145 Supply temperature sensor 805000056 1 1 1 1
Heat Exchanger (Connued)
98 Rinnai M-Series Condensing Boiler Combi Manual
Hydraulic Parts/Pipes
Rinnai M-Series Condensing Boiler Combi Manual 99
Item # Descripon Part Number Quanty
M060C M090C M120C M160C
79 Condensate collector kit 807000140 1 1 1 1
80 Condensate drain kit 807000141 1 1 1 1
81 Condensate drain o-ring Ø28.25 x
2.62 mm
807000142 1 1 1 1
82 Condensate drain inner tube 807000143 1 1 1 1
83 Condensate drain tube o-ring
Ø37.69 x 3.53 mm
807000144 1 1 1 1
84 Condensate drain outer tube 807000145 1 1 1 1
85 Condensate collector cover gasket 807000146 1 1 1 1
86 Plate heat exchanger
807000147 1 - - -
807000148 - 1 1 1
87 Plate heat exchanger o-ring 18.64 x
3.53 mm (4 pack)
807000149 1 1 1 1
88 Cold water supply pipe 807000150 1 1 1 1
89 De-Aerator o-ring Ø13.94 x 2.62
mm
809000028 1 1 1 1
90 Water control assembly—return 807000151 1 1 1 1
91 3-way valve cartridge 807000152 1 1 1 1
92 O-ring Ø18 x 2 mm 809000162 1 1 1 1
93
Flow restrictor-yellow 807000154 1 - - -
Flow restrictor-blue 807000155 - 1 1 1
94 3-way valve/pump pipe 807000156 1 1 1 1
95 O-ring Ø21.89 x 2.62 mm 809000088 5 5 5 5
96 Water control assembly-supply 807000157 1 1 1 1
97 Supply Pipe Heat Exchanger 807000158 1 1 1 1
98 Hydro Group Supply 807000159 1 1 1 1
99 Water control pipe retenon clip 807000160 6 6 6 6
100 Bolt M3 x 30 809000149 2 2 2 2
101 Water control assembly supply plug 807000161 1 1 1 1
102 Pump gasket 1 in. 807000099 2 2 2 2
103 Pump connecon assembly 807000162 1 1 1 1
Hydraulic Parts/Pipes (Connued)
100 Rinnai M-Series Condensing Boiler Combi Manual
Hydraulic Parts/Pipes (Connued)
Item # Descripon Part Number Quanty
M060C M090C M120C M160C
104 Pipe Return Elbow 807000163 1 1 1 1
105 Supply Pipe to Heat
Exchanger
807000164 1 1 1 1
110 Allen head bolt M5 x10 mm 809000150 4 4 4 4
114 Bypass valve kit 807000167 1 1 1 1
115 Gas/DHW connecon ng
1/2 in. FNPT x 3/4 in. MNPT
806000041 3 3 3 3
116 Supply/return ng 3/4 in.
FNPT x 1 in. MNPT
807000168 2 2 2 2
126 O-Ring Ø21.82 x 3.53 mm 807000153 3 3 3 3
128 Screw M5x12 809000045 2 2 2 2
129 Flow sensor retenon clip 809000151 1 1 1 1
130 Gas valve 806000034 1 1 1 1
131 3/4 in. gas valve gasket 809000062 1 1 1 1
133 Yellow silicone o-ring Ø13.94
x 2.62 mm
809000055 1 1 1 1
134 Gas pipe to gas valve 806000047 1 1 1 1
135 Gas pipe/gas valve to fan 806000048 1 1 1 1
136 3-way valve actuator 807000131 1 1 1 1
137 DHW ow sensor 805000061 1 1 1 1
138 DHW sensor 805000064 1 1 1 1
139 Pump 807000132 1 1 1 1
140 Water pressure sensor 805000058 1 1 1 1
141 Return temperature sensor 805000057 1 1 1 1
161 Clip Ø19 mm 809000158 1 1 1 1
Rinnai M-Series Condensing Boiler Combi Manual 101
Electrical Components
*Solo Only
102 Rinnai M-Series Condensing Boiler Combi Manual
Item # Descripon Part Number Quanty
M060C M090C M120C M160C
142 Ignion control box 805000060
1 1 1 1
146 controller casing/back 809000152
1 1 1 1
147 PC Board 805000055
1 1 1 1
148 Key pad 805000067
1 1 1 1
149 Controller casing/front 809000153
1 1 1 1
150 Hinge support 809000154
2 2 2 2
152 Fuse 4A (250V) 805000068
1 1 1 1
153
Screw terminal-white 805000069
1 1 1 1
Screw terminal-blue 805000071
1 1 1 1
Screw terminal-red 805000072
1 1 1 1
154 Wire harness 805000073
1 1 1 1
155 Power Cord 805000074
1 1 1 1
156 Controller gasket 809000155
1 1 1 1
157 Controller scroll wheel 809000156
1 1 1 1
159 Controller cover 809000157
1 1 1 1
160 On/o switch 805000076
1 1 1 1
162 Display for PCB 805000077
1 1 1 1
Electrical Components (Connued)
Rinnai M-Series Condensing Boiler Combi Manual 103
Legend:
Refer to the legend below for the system applicaons shown in this secon.
IMPORTANT
Primary/secondary piping is necessary in the following applicaons:
• When using external pumps
• Large zoned systems
• High ow applicaons
• Systems with high dierenal pressures
• Systems with high pressure drops
For pressure curve informaon, refer to the following secons in the Appendix.
• 14.8 CH Pressure Drop and Flow Curve
• 14.9 DHW Pressure Drop and Flow Curve
This picture illustrates a suggested
arrangement. Some of the ngs
are oponal.
104 Rinnai M-Series Condensing Boiler Combi Manual
PC Board Wiring for the above applicaon example
Outdoor Temperature Sensor
Thermostat
Pump
Zone Control
Low Water Cut-
o (If Required)
Rinnai M-Series Condensing Boiler Combi Manual 105
Outdoor
Temperature Sensor
Thermostat 1
Pump
Zone Control
Low Water Cut-
o (If Required)
Thermostat 2
Thermostat 3
Zone Valve 3
Zone Valve 2
Zone Valve 1
PC Board Wiring for the above applicaon example
106 Rinnai M-Series Condensing Boiler Combi Manual
PC Board Wiring for the above applicaon example
Outdoor
Temperature Sensor
Pump
Zone Control
Low Water Cut-
o (If Required)
Thermostat
Air Handler
Control
Rinnai M-Series Condensing Boiler Combi Manual 107
PC Board Wiring for the above applicaon example
Outdoor
Temperature Sensor
Thermostat 1
Zone Control
Low Water Cut-
o (If Required)
Thermostat 2
Thermostat 3
Pump 3
Pump 2
Pump 1
108 Rinnai M-Series Condensing Boiler Combi Manual
PC Board Wiring for the above applicaon example
Outdoor
Temperature Sensor
Thermostat 1
Zone Control
Low Water Cut-
o (If Required)
Thermostat 2
Pump 3
Pump 2
Pump 1
Rinnai M-Series Condensing Boiler Combi Manual 109
This boiler is congured for Natural Gas
only. To convert to Propane Gas, follow the
instrucons in this secon.
For installaons in Canada, the conversion shall
be carried out in accordance with the
requirements of the provincial authories
having jurisdicon and in accordance with the
requirements of the CGA-B149.1, Natural Gas
and Propane Installaon Code.
The appliance must be installed in accordance
with:
• Local codes or, in the absence of local
codes, the Naonal Fuel Gas Code, ANSI
Z223.1/NFPA 54 and/or CSA B149.1,
Natural Gas and Propane Installaon Code.
• The Manufactured Home Construcon and
Safety Standard, Title 24 CFR, Part 3280
and/or CAN/CSA Z240 MH Series, Mobile
Homes, Series M86 / Manufactured Home
Construcon and Safety Standard, Title 24
CFR.
IMPORTANT
• Before you get started, conrm that
the inlet gas pressure is between the
minimum and maximum pressures
allowed for this boiler.
• If subsequent conversions are made,
then a new conversion label must be
placed on the boiler to accurately
reect the gas type.
The gas supply shall be shut o prior to
disconnecng the electrical power, before
proceeding with the conversion.
CAUTION
Do not touch any other areas on the PC
board other than the described buons
while power is supplied to the appliance.
Parts of the PC board are supplied with 120
volts AC.
CAUTION
Do not touch the areas at or near the heat
exchanger or hot water lines. These areas
become very hot and could cause burns.
CAUTION
• The conversion kit shall be installed by
a qualied service agency in
accordance with the manufacturer’s
instrucons and all applicable codes
and requirements of the authority
having jurisdicon. The informaon in
these instrucons must be followed
exactly to minimize the risk of re or
explosion or to prevent property
damage, personal injury or death. The
qualied service agency is responsible
for the proper installaon of this kit.
The installaon is not proper and
complete unl the operaon of the
converted appliance is checked as
specied in the manufacturer’s
instrucons supplied with the kit.
• Failure to correctly assemble the
components according to these
instrucons may result in a gas leak or
explosion.
WARNING
• Conversion Kit (supplied with boiler)
• Adjustable wrench
• Combuson analyzer
110 Rinnai M-Series Condensing Boiler Combi Manual
1. Conrm that the inlet gas pressure is
between the minimum and maximum
pressures allowed for this boiler.
2. Disconnect electrical power to the boiler.
3. Turn o the boiler’s gas supply by turning
o the gas control valve.
4. Remove the boiler’s front panel. For
details, see secon “3.7 How to Remove
the Front Panel.”
5. Remove the air supply damper:
• Unclip the Velcro piece
• Li up the air supply damper to
remove and gently place aside
6. Unscrew the gas valve and gas venturi
connecons.
Air supply
damper
8. Pull out the yellow gasket from the gas
venturi.
Gas line
7. Remove the gas line and place aside.
Gas line removed
Rinnai M-Series Condensing Boiler Combi Manual 111
10. Replace the yellow gasket into the gas
venturi.
9. Remove the Liquid Propane restrictor in
the gas venturi.
11. Reconnect the gas valve, gas venturi
connecons and gas line.
12. Reconnect the air supply damper.
13. Locate the controller. Remove all screw
terminals and unclip the 6 tabs from the
front panel.
14. Remove the front housing of the PC Board.
15. Insert the EEPROM key (included with
conversion kit) into the connector on the
PC Board.
19. Press the Back buon for approximately 7
seconds.
Your psi values may dier than the values
shown in image.
Controller top view
Controller boom
Screw terminals
16. Reaach the PC Board front housing and
screw terminals.
17. Connect electrical power and power up the
boiler.
18. The Airpurge acve screen appears on the
boiler display.
112 Rinnai M-Series Condensing Boiler Combi Manual
20. The Flash Memory Detected screen
appears. Select COPY and Press OK.
21. The following screen appears indicang
data parameters have been copied to the
Mainboard.
22. The Home screen briey appears on the
display and then the boiler turns o.
Home
screen
23. Aer a few seconds, the boiler automacally
turns on and goes into Airpurge acve mode.
Your psi values may dier than the values
shown in image.
24. To remove the EEPROM key from the PC
Board:
a. Disconnect power to the boiler
b. Remove the front housing of the PC
Board.
c. Remove the EEPROM key from the
connector.
25. Reaach the PC Board front housing and
screw terminals. Clip the 6 tabs back into
place.
26. Connect electrical power to the boiler. The
boiler will be back in normal operang
mode with the proper gas type
parameters.
27. Replace the boiler front panel.
28. The conversion process is complete. Verify
the O2 sengs in minimum and maximum
input for your new gas type. See secon
“10. Commissioning” for detailed
instrucons.
29. Verify ame appearance as shown below
with the boiler in operaon.
Flame
Rod
Blue Flame
SATISFACTORY
Front View
Front View
Flame
Rod
UNSATISFACTORY
Yellow or Green Flame
Figure 4
Rinnai M-Series Condensing Boiler Combi Manual 113
114 Rinnai M-Series Condensing Boiler Combi Manual
Rinnai M-Series Condensing Boiler Combi Manual 115
0 1 2 3 4 5
6
7 8
9
10
20
15
25
30
10
5
0
Water Flow (GPM)
Pressure Loss (Feet of Head)
* Pressure drop curve applies to all M-Series Condensing Boilers (M060C, M090C, M120C and M160C).
116 Rinnai M-Series Condensing Boiler Combi Manual
Water Flow (GPM)
Pressure Loss (Feet of Head)
35
30
25
0
5
10
15
20
0
0.5
1 1.5
2
2.5 3
3.5
4
Rinnai M-Series Condensing Boiler Combi Manual 117
Outdoor Reset Sensor (T4)
Supply Sensor (T1)
Return Sensor (T2)
DHW Sensor (T3)
NTC1k (25°C) NTC10k (25°C)
Temperature
(°C)
Temperature
(°F)
Resistance
(Ω)
Temperature
(°C)
Temperature
(°F)
Resistance
(Ω)
-10 14.0 4.574 -10 14.0 55.047
-9 15.8 4.358 0 32.0 32.555
-8 17.6 4.152 10 50.0 19.873
-7 19.4 3.958 12 53.6 18.069
-6 21.2 3.774 14 57.2 16.447
-5 23.0 3.600 16 60.8 14.988
-4 24.8 3.435 18 64.4 13.674
-3 26.6 3.279 20 68.0 12.488
-2 28.4 3.131 22 71.6 11.417
-1 30.2 2.990 24 75.2 10.449
0 32.0 2.857 26 78.8 9.573
1 33.8 2.730 28 82.4 8.779
2 35.6 2.610 30 86.0 8.059
3 37.4 2.496 32 89.6 7.406
4 39.2 2.387 34 93.2 6.811
5 41.0 2.284 36 96.8 6.271
6 42.8 2.186 38 100.4 5.779
7 44.6 2.093 40 104.0 5.330
8 46.4 2.004 42 107.6 4.921
9 48.2 1.920 44 111.2 4.547
10 50.0 1.840 46 114.8 4.205
11 51.8 1.763 48 118.4 3.892
12 53.6 1.690 50 122.0 3.605
13 55.4 1.621 52 125.6 3.343
14 57.2 1.555 54 129.2 3.102
15 59.0 1.492 56 132.8 2.880
16 60.8 1.433 58 136.4 2.677
17 62.6 1.375 60 140.0 2.490
18 64.4 1.320 62 143.6 2.318
19 66.2 1.268 64 147.2 2.159
20 68.0 1.218 66 150.8 2.013
21 69.8 1.170 68 154.4 1.878
22 71.6 1.125 70 158.0 1.753
23 73.4 1.081 72 161.6 1.638
24 75.2 1.040 74 165.2 1.531
25 77.0 1.000 76 168.8 1.433
26 78.8 0.962 78 172.4 1.341
27 80.6 0.926 80 176.0 1.256
28 82.4 0.892 82 179.6 1.178
29 84.2 0.858 84 183.2 1.105
30 86.0 0.827 86 186.8 1.037
35 95.0 0.687 88 190.4 0.974
40 104.0 0.575 90 194.0 0.915
118 Rinnai M-Series Condensing Boiler Combi Manual
The following informaon is required by ANSI Z21.13:
If a boiler is removed from a common vent system, the common vent system is likely to be too large
for proper venng of the remaining appliances connected to it.
The instrucons shall include the test procedure set forth below:
At the me of removal of an exisng boiler, the following steps shall be followed with each other
appliances remaining connected to the common venng system are not in operaon.
1. Seal any unused openings in the common venng system.
2. Visually inspect the venng system for proper size and horizontal pitch and determine
there is no blockage or restricon, leakage, corrosion and other deciencies which could
cause an unsafe condion.
3. Insofar as is praccal, close all building doors and windows and all doors between the
space in which the appliances remaining connected to the common venng system are
located and other spaces of the building. Turn on clothes dryers and any appliance not
connected to the common venng system. Turn on any exhaust fans, such as range hoods
and bathroom exhausts, so they will operate at maximum speed. Do not operate a
summer exhaust fan. Close replace dampers.
4. Place in operaon the appliance being inspected. Follow the lighng instrucons. Adjust
thermostat so appliance will operate connuously.
5. Test for spillage at the dra hood relief opening aer ve minutes of main burner
operaon. Use the ame of a match or candle, or smoke from a cigaree, cigar, or pipe.
6. Aer it has been determined that each appliance remaining connected to the common
venng system properly vents when tested as outlined above, return doors, windows,
exhaust fans, replace dampers, and any other gas-burning appliance to their previous
condion of use.
7. Any improper operaon of the common venng system should be corrected so the
installaon conforms with the Naonal Fuel Gas Code, ANSI Z223.1/NFPA 54, and/or the
Natural Gas and Propane Installaon Code, CAN/CSA B149.1. When resizing any poron of
the common venng system, the common venng system should be resized to approach
the minimum size as determined using the appropriate tables in Chapter 13 of the
Naonal Fuel Gas Code, ANSI Z223.1/NFPA 54, and/or the Natural Gas and Propane
Installaon Code, CAN/CSA B149.1.
Rinnai M-Series Condensing Boiler Combi Manual 119
FOR GAS MODELS SOLD IN MASSACHUSETTS
NOTICE BEFORE INSTALLATION:
This direct-vent appliance must be installed by a properly trained licensed professional. If you are
not properly trained, you must not install this unit.
IMPORTANT: In the State of Massachuses (248 CMR 4.00 & 5.00):
For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or
structure used in whole or in part for residenal purposes, including those owned or operated by
the Commonwealth and where the side wall exhaust vent terminaon is less than 7 above
nished grade in the area of the venng, including but not limited to decks and porches, the
following requirements shall be sased:
1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the me of installaon of the side wall
horizontal vented gas fueled equipment, the installing plumber or gaser shall observe that a
hard wired carbon monoxide detector with an alarm and baery back-up is installed on the
oor level where the gas equipment is to be installed. In addion, the installing plumber or
gaser shall observe that a baery operated or hard wired carbon monoxide detector with an
alarm is installed on each addional level of the dwelling, building or structure served by the
side wall horizontal vented gas fueled equipment. It shall be the responsibility of the property
owner to secure the services of qualied licensed professionals for the installaon of hard
wired carbon monoxide detectors
A. In the event that the side wall horizontally vented gas fueled equipment is installed in a
crawl space or an ac, the hard wired carbon monoxide detector with alarm and baery
back-up may be installed on the next adjacent oor level.
B. In the event that the requirements of this subdivision can not be met at the me of
compleon of installaon, the owner shall have a period of thirty (30) days to comply with
the above requirements; provided, however, that during said thirty (30) day period, a
baery operated carbon monoxide detector with an alarm shall be installed.
2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in
accordance with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed
and IAS cered.
3. SIGNAGE. A metal or plasc idencaon plate shall be permanently mounted to the exterior
of the building at a minimum height of 8 above grade directly in line with the exhaust vent
terminal for the horizontally vented gas fueled heang appliance or equipment. The sign shall
read, in print size no less than one-half (1/2) inch in size, "GAS VENT DIRECTLY BELOW. KEEP
CLEAR OF ALL OBSTRUCTIONS.”
4. INSPECTION. The state or local gas inspector of the side wall horizontally vented gas fueled
equipment shall not approve the installaon unless, upon inspecon, the inspector observes
carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR
5.08(2)(a)1 through 4.
120 Rinnai M-Series Condensing Boiler Combi Manual
Limited Warranty for M-Series Boiler Models
Boiler Models:
• Combi: M060C, M090C, M120C, M160C
• Solo: M060S, M090S, M120S, M160S
What Is Covered?
The Rinnai Standard Limited Warranty covers any defects in materials or workmanship when the
product is installed and operated according to Rinnai wrien installaon instrucons, subject to
the terms within this Limited Warranty document. This Limited Warranty applies only to products
that are installed correctly in the United States and Canada. Improper installaon may void this
Limited Warranty. It is recommended that a trained and qualied professional who has aended a
Rinnai installaon training class complete your installaon. This Limited Warranty is subject to the
condions that the Rinnai boiler has been installed and proper maintenance has been performed,
according to the Installaon and Servicing Instrucons, by a professional heang contractor. Proof
of the required service and maintenance must be kept in the provided Rinnai Installaon,
Commissioning and Service Record. This Limited Warranty coverage, as set out in the table below,
extends to the original purchaser and subsequent owners, but only while the product remains at
the site of the original installaon, and terminates if the product is moved or reinstalled at a new
locaon.
[1]
Parts replaced during recommended maintenance procedures are not covered by this Limited Warranty.
What Will Rinnai Do?
Rinnai will repair or replace the covered product or any part or component that is defecve in
materials or workmanship as set forth in the above table. Rinnai will pay reasonable labor charges
associated with the repair or replacement of any such part or component during the term of the
labor warranty period. All repair parts must be genuine Rinnai parts. All repairs or replacements
must be performed by a qualied professional who is properly trained to do the type of repair.
Replacement of the product may only be authorized by Rinnai at its sole discreon. Rinnai does not
authorize any person or company to assume for it any obligaon or liability in connecon with the
replacement of the product. If Rinnai determines that repair of a product is not possible, Rinnai
may replace the product with a comparable product at Rinnai’s sole discreon. The warranty claim
for product parts and labor may be denied if a component or product returned to Rinnai is found to
be free of defects in material or workmanship; damaged by improper installaon, use or operaon;
or damaged during return shipping.
Period of Coverage (from date of purchase)
Item
Residenal Applicaons Commercial Applicaons
Heat Exchanger 12 Years 5 Years
All Other Parts and Components
[1]
2 Years 2 Years
Reasonable Labor
1 Year 1 Year
Rinnai M-Series Condensing Boiler Combi Manual 121
How To Obtain Service For the name of a trained and qualied professional, please contact your
place of purchase, visit the Rinnai website (www.rinnai.us), call Rinnai at 1-800-621-9419 or write
to Rinnai at 103 Internaonal Drive, Peachtree City, Georgia 30269.
Proof of purchase is required to obtain warranty service. You may show proof of purchase with a
dated sales receipt, or by registering within 90 days of purchasing the product. To register your
Rinnai Condensing Boiler, please visit www.rinnai.us. For those without internet access, please call
1-800-621-9419. Receipt of registraon by Rinnai will constute proof-of-purchase for this product.
Registraon of product installed in new home construcon may be veried with a copy of the
closing papers provided by the inial home buyer. However, registraon is not necessary in order
to validate this Limited Warranty.
What Is Not Covered? This Limited Warranty does not cover any failures, heat exchanger leakage,
or operang dicules due to the following:
• Accident, abuse or misuse
• Alteraon
• Misapplicaon
• Force majeure
• Improper installaon (such as but not limited to inadequate water quality, condensate
damage, improper venng, incorrect gas type, incorrect gas or water pressure, or absence of
a drain pan under the product)
• Improper maintenance (such as but not limited to scale build-up, freeze damage, or vent
blockage)
• Improper water quality or the use of unapproved anfreeze or other chemical addives in
the boiler system
• Installaon of the boiler in a heang system where polybutylene pipe without an oxygen
barrier is used
• Any installaon that is not closed loop or where oxygen may enter the heang system
• Use in or around areas where chemical agents are used (such as but not limited to chlorine,
hair spray, or hair dyes)
• Damage or failure caused by contaminated air, including, but not limited to sheetrock
parcles, plasterboard parcles, dust, dirt, or lint entering the boiler or any of its components
• Incorrect sizing
• A failure of any component in the Hydronic system not supplied by Rinnai
• Any other causes other than defects in materials or workmanship
This Limited Warranty does not cover any product used in an applicaon that uses chemically
treated water such as a pool or spa heater.
If you purchase a Rinnai product from an unauthorized dealer, or if the original factory serial
number has been removed, defaced or altered, your Rinnai warranty will not be valid.
Limitaon on Warranes
No one is authorized to make any other warranes on behalf of Rinnai America Corporaon. Except
as expressly provided herein, there are no other warranes, expressed or implied, including, but
not limited to warranes of merchantability or tness for a parcular purpose, which extend
beyond the descripon of the warranty herein.
Any implied warranes of merchantability and tness arising under state law are limited in
duraon to the period of coverage provided by this Limited Warranty, unless the period provided
by state law is less. Some states do not allow limitaons on how long an implied Limited Warranty
lasts, so the above limitaon may not apply to you.
Rinnai shall not be liable for indirect, incidental, special, consequenal or other similar damages
that may arise, including lost prots, damage to person or property, loss of use, inconvenience, or
liability arising from improper installaon, service or use. Some states do not allow the exclusion or
limitaon of incidental or consequenal damages, so the above limitaon may not apply to you.
This Limited Warranty gives you specic legal rights, and you may also have other rights which vary
from state to state.
www.rinnai.us/warranty
122 Rinnai M-Series Condensing Boiler Combi Manual
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