Heat Pump Hot Water System
Operation & Installation Manual
MODEL
EHPT180VM
Rinnai 2 EHPT Heat Pump OIM - Issue 2
This appliance must be installed in accordance with:
• Manufacturer’s Installation Instructions
• Current AS/NZS 3500
• Plumbing Code of Australia (PCA)
• Local Regulations and Municipal Building Codes
including local OH&S requirements
This system must be installed, commissioned, serviced,
maintained and removed ONLY by an Authorised Person.
NOT SUITABLE AS A POOL OR SPA HEATER
For continued safety of this appliance it must be installed and
maintained in accordance with the manufacturer’s instructions.
AS3498 Lic W00169
SAI Global
AS/NZS 2712
Lic No. 1849
SAI Global
Rinnai 3 EHPT Heat Pump OIM - Issue 2
TABLE OF CONTENTS
Warnings and Important Information 4
Safety and Regulatory Information ����������������������������������������������������������������������������������������������������������������� 4
Transport and Storage of Appliance ��������������������������������������������������������������������������������������������������������������� 5
Scald Hazards ��������������������������������������������������������������������������������������������������������������������������������������������������� 6
Operating Principle ������������������������������������������������������������������������������������������������������������������������������������������ 7
System Schematic �������������������������������������������������������������������������������������������������������������������������������������������� 7
Safety Devices �������������������������������������������������������������������������������������������������������������������������������������������������� 7
Excessive Discharge from Safety Devices ���������������������������������������������������������������������������������������������������� 8
Hydrogen Gas ��������������������������������������������������������������������������������������������������������������������������������������������������� 9
Turning On the Water Heating System ����������������������������������������������������������������������������������������������������������� 9
Turning O the Water Heating System ����������������������������������������������������������������������������������������������������������� 9
Draining and Filling ������������������������������������������������������������������������������������������������������������������������������������������ 9
Maintenance and Regular Care ����������������������������������������������������������������������������������������������������������������������� 9
Save a Service Call 10
Fault Codes ����������������������������������������������������������������������������������������������������������������������������������������������������� 11
Specications 12
System Specications ����������������������������������������������������������������������������������������������������������������������������������� 12
Dimensions ����������������������������������������������������������������������������������������������������������������������������������������������������� 13
Clearances ������������������������������������������������������������������������������������������������������������������������������������������������������ 14
Installation 15
Regulations and Occupation Health and Safety (OH&S) ���������������������������������������������������������������������������� 15
Location ���������������������������������������������������������������������������������������������������������������������������������������������������������� 15
Water Supply ��������������������������������������������������������������������������������������������������������������������������������������������������� 16
Storage Temperature ������������������������������������������������������������������������������������������������������������������������������������� 16
Hot Water Delivery Temperature ������������������������������������������������������������������������������������������������������������������� 16
Valves and Fittings ����������������������������������������������������������������������������������������������������������������������������������������� 17
Transport and Handling ��������������������������������������������������������������������������������������������������������������������������������� 17
Positioning the Heat Pump ���������������������������������������������������������������������������������������������������������������������������� 18
Connect the PTR Valve ���������������������������������������������������������������������������������������������������������������������������������� 18
Plumbing Connections ���������������������������������������������������������������������������������������������������������������������������������� 18
Connect Cold / Hot Water Supply ����������������������������������������������������������������������������������������������������������������� 19
Connect Condensate Drain line �������������������������������������������������������������������������������������������������������������������� 19
Typical Plumbing Layout ������������������������������������������������������������������������������������������������������������������������������� 20
Electrical Connections ����������������������������������������������������������������������������������������������������������������������������������� 20
Wiring Schematic ������������������������������������������������������������������������������������������������������������������������������������������� 21
Electrical Tests ����������������������������������������������������������������������������������������������������������������������������������������������� 22
Filling the System ������������������������������������������������������������������������������������������������������������������������������������������� 22
Commissioning and Finishing the Installation �������������������������������������������������������������������������������������������� 22
Controller Layout ������������������������������������������������������������������������������������������������������������������������������������������ 23
Operating Functions �������������������������������������������������������������������������������������������������������������������������������������� 24
Wi-Fi Connection �������������������������������������������������������������������������������������������������������������������������������������������� 26
Contacts 28
Rinnai 4 EHPT Heat Pump OIM - Issue 2
SAFETY AND REGULATORY INFORMATION
WARNING
DO NOT operate this system before reading the manufacturers instructions.
This appliance must be installed, commissioned and serviced by an authorised person in
accordance with all applicable local rules and regulations.
Access covers of water heating system components will expose 240V wiring and MUST only be
removed by an authorised person.
This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the appliance by a person responsible for
their safety.
For continued safety of this appliance it must be installed, operated and maintained in accordance
with the manufacturer’s instructions.
Children should be supervised to ensure they DO NOT play with the appliance.
The Heat Pump is tted with a power cord & 15 amps plug , It MUST connect to an independent,
fused, AC 240V 50 Hz power supply with an isolating switch installed at the switch board, which
shall eectively isolate all active supply conductors from the circuit and means for disconnection
MUST be incorporated in the xed wiring in accordance with the wiring rules. If the power
supply cord is damaged, it MUST be replaced by an authorised person in order to avoid a hazard.
Take care not to touch the power connections or plugs with wet hands.
Care should be taken not to touch the pipe work as it may be HOT!
DO NOT place articles on or against this appliance.
DO NOT store chemicals or ammable materials near this appliance.
DO NOT operate with collectors or covers removed from this appliance.
DO NOT activate heat pump unless cylinder is full of water.
NEVER use a ammable spray such as hair spray, paint, etc near this unit as this may cause a
re.
WARNING
MANDATORY INSPECTION PRIOR TO INSTALLATION
Immediately report any damage or discrepancies to the Supplier of the appliance. This
appliance was inspected and tested at the time of manufacture and packaging, and released for
transportation without known damage. Upon receipt, inspect the exterior for evidence of rough
handling in shipment. Ensure that the appliance is labelled correctly for the gas and electrical
supply, and/or other services it is intended to be connected to.
For safety and warranty purposes, appliances that may be damaged or incorrect must not be
installed or operated under any circumstances. Installation of damaged or incorrect appliances
may contravene local government regulations. Rinnai disclaims any liability or responsibility
whatsoever in relation to the installation or operation of damaged or incorrect appliances.
NOTICE TO VICTORIAN CONSUMERS
This appliance must be installed by a person licensed with the Victorian Building Authority.
Only a licensed person will have insurance protecting their workmanship.
So make sure you use a licensed person to install this appliance and ask for your Compliance Certicate.
For further information contact the Victorian Building Authority on 1300 815 127
WARNINGS AND IMPORTANT INFORMATION
Rinnai 5 EHPT Heat Pump OIM - Issue 2
TRANSPORT AND STORAGE OF APPLIANCE
RISK OF FIRE
The appliance(s) shall be stored and transported in an area without ignition sources (for example:
open ames, an operating gas appliance or an operating electric heater)
DO NOT pierce or burn the appliance.
Be aware that refrigerants may not contain an odour.
Compliance with AS/NZS 5149 MUST be observed while storing the appliance.
IMPORTANT
National and state regulations exist for storage, handling and transport of hazardous goods
including ammable gasses. The maximum number of pieces of equipment or the conguration
of the equipment, permitted to be transported or stored together will be determined by the
applicable regulations.
IMPORTANT
IMPORTANT
DO NOT TILT
MORE THAN 45°
FROM VERTICAL
45°
The Rinnai Electric Heat Pump must be transported at an angle no greater that 45º from vertical. As the compressor
unit is located at the top of the electric heat pump, should the heat pump be tilted at a greater angle than 45º from
vertical, the lubrication oil within the compressor can run down into the mufers. This will leave the compressor
motor without sufcient lubrication and lead to premature failure of the compressor unit.
As a general good practice it is better to keep the compressor upright as much as possible to avoid any risks.
Returning the Rinnai Electric Heat Pump to a vertical position will allow the oil to properly ow back into the
compressor motor.
Tilting beyond 45º from vertical will also place undue strain on compressor motor mounts and associated piping.
WARNING
Do not use means to accelerate the defrosting process or to clean, other than those recommended
by the manufacturer.
The appliance shall be stored in a room without continuously operating ignition sources. For
example, open ames, an operating gas appliance or an operating electric heater.
Do not pierce or burn.
Be aware that refrigerants may not contain an odour.
WARNINGS AND IMPORTANT INFORMATION
Rinnai 6 EHPT Heat Pump OIM - Issue 2
SCALD HAZARDS
HOT WATER CAN CAUSE SCALDS.
CHILDREN, DISABLED, ELDERLY AND THE INFIRM ARE AT THE HIGHEST RISK OF
BEING SCALDED.
FEEL WATER TEMPERATURE BEFORE BATHING OR SHOWERING.
SCALDS FROM HOT WATER TAPS CAN RESULT IN SEVERE INJURIES TO YOUNG
CHILDREN.
SCALDS OCCUR WHEN CHILDREN ARE EXPOSED DIRECTLY TO HOT WATER WHEN
THEY ARE PLACED INTO A BATH WHICH IS TOO HOT.
ALWAYS......
Test the temperature of the water with your elbow before placing your child in the bath, also carefully
feel water before bathing or showering yourself.
Supervise children whenever they are in the bathroom.
Make sure that the hot water tap is turned o tightly.
CONSIDER.....
Installing child proof tap covers or child resistant taps (both approaches will prevent a small hand being
able to turn on the tap).
Installing tempering valves or thermostatic mixing valves which reduce the hot water temperature
delivered to the taps. Your local plumbing authority may already require that these be tted. Contact
your installer or local plumbing authority if in doubt.
NEVER….
Leave a toddler in the care of another child. They may not understand the need to have the water
temperature set at a safe level.
WARNINGS AND IMPORTANT INFORMATION
Rinnai 7 EHPT Heat Pump OIM - Issue 2
OPERATING PRINCIPLE
The operation of an electric heat pump is very similar to a refrigerator, but in reverse. A heat pump operates by
transferring heat from the ambient outside air into the water. Electricity is just used to operate the system, but not
to directly heat the water. Because of this energy consumption is signicantly reduced as compared to an electric
element hot water system. The warmer the climate in which the heat pump is installed, the more efcient the heat
pump system will be at heating water.
The heat pump unit includes highly efcient copper tube heat exchanger wrapped around the inner cylinder for
thermal conductivity. A temperature sensor in the tank is used to control the heat pump operation to achieve
suitable tank temperature.
During the occasional times when the ambient weather conditions aren’t suitable for the heat pump to operate, the
electric element will provide heating to ensure a supply of hot water.
SYSTEM SCHEMATIC
SAFETY DEVICES
The water heating system is supplied with various safety devices including temperature sensors, overheat sensors
and switches and a Pressure & Temperature Relief (PTR) valve. These devices must not be tampered with or
removed. The water heating system must not be operated unless each of these devices is tted and is in working
order.
WARNING
DO NOT tamper with or remove safety devices.
DO NOT operate the water heater unless all safety devices are tted and in working order.
DO NOT block or seal the PTR Valve and drain pipe.
Filter
Filter
Exhaust Temperature
Return Temperature
EEV
Fan Motor
Fan
Ambient Temperature Sensor
E-Heater
High Pressure Sensor
4-Way Valve
Check Valve
Heat Exchanger
Coil Temperature
Sensor
Tank Temperature
Sensor
WARNINGS AND IMPORTANT INFORMATION
Rinnai 8 EHPT Heat Pump OIM - Issue 2
Pressure & Temperature Relief (PTR) Valve
This valve is located near the top of the water heater and is
essential for safe operation. It is normal for the valve to release
a small quantity of water through the drain line during heating.
However, continuous leakage of water from the valve and its
drain line may indicate a problem with the water heater.
WARNING
NEVER block the outlet of the PTR valve or its drain line for any reason. The easing gear MUST
be operated at least every 6 months to remove lime deposits and verify that it is not blocked.
Failure to do this may result in the water heater failing.
If the valve does not discharge water when the easing gear lever is opened, or does not seal again
when the easing gear is closed, attendance by an authorised person MUST be arranged without
delay. The PTR valve is not serviceable.
EXCESSIVE DISCHARGE FROM SAFETY DEVICES
Pressure & Temperature Relief (PTR) Valve
It is normal and desirable that this valve allows a small quantity of water to be discharged during the heating cycle.
If it discharges more than a bucket of water during a 24 hour period or discharges continuously there may be
another problem.
If the valve dribbles continuously, try easing the valve gear for a few seconds as described above. This may
dislodge any foreign matter and alleviate the problem.
If the valve discharges at high ows, especially at night, it may be as a result of the water pressure exceeding the
design pressure of the water heater. Ask your installer to t a Pressure Limiting Valve (PLV).
WARNING
NEVER replace the PTR valve with one which has a higher pressure rating than is specied for
your water heater.
Expansion Control Valve (ECV) - if required
It is normal that this valve allows a small quantity of water to be discharged during the heating cycle. If it discharges
more than a bucket of water during a 24 hour period or discharges continuously there may be another problem.
If the valve leaks continuously, try easing the valve gear for a few seconds. This may dislodge any foreign matter
and alleviate the problem. If it does not, please contact Rinnai.
Operate the easing gear regularly to remove any lime deposits and to verify that it is not blocked.
Lift lev er until water
flo w s from drain line
(Low er lever gen tly!)
WARNINGS AND IMPORTANT INFORMATION
Rinnai 9 EHPT Heat Pump OIM - Issue 2
HYDROGEN GAS
If the hot water unit is not used for two weeks or more, a quantity of hydrogen gas, which is highly ammable,
may accumulate in the water heater. To dissipate this safely, it is recommended that a non-electrically operated
hot tap be turned on for two minutes at a sink, basin, or bath, but not a dishwasher or other appliance. During this
procedure there MUST be no smoking, open ame or any electrical appliance operating nearby. If hydrogen is
discharged through the tap, it will probably make a sound like air escaping.
TURNING ON THE WATER HEATING SYSTEM
Switch on the electric supply to the heat pump unit. Water heating will now occur as required. It may take a number
of hours before hot water is available.
TURNING OFF THE WATER HEATING SYSTEM
If you plan to be away for only a few nights, we suggest you leave the water heating system switched on. If it is
necessary to switch off the water heater, do so as outlined below:
WARNING
DO NOT turn power o to the heat pump unit if snow or frost conditions are expected as
components in the system may be damaged by freezing. If power needs to be turned o or power
failure occurs and freezing conditions are expected, the water needs to be drained from the heat
pump unit. Follow the procedure described below in the section ‘Draining and Filling’.
DRAINING AND FILLING
Draining or lling of the complete system normally only occurs during installation or servicing and must be carried
out by an authorised person.
Draining water from the heat pump unit is necessary if the power will be shut off to the unit and snow or frost
conditions are expected. Arrange for an authorised person to carry out this task.
To drain the heat pump:
1. Turn off power to the heat pump
2. Close the cold water mains supply stop cock
3. Open a hot tap to relieve pressure
4. Disconnect the hot outlet near the top of the storage cylinder
5. Disconnect the cold inlet near the bottom of the storage cylinder.
6. The system will now drain completely.
MAINTENANCE AND REGULAR CARE
Operate the easing gear of the PTR and the ECV if tted as described in the section ‘Safety Devices’ on page 7.
The overow tray (supplied by installer) and drain underneath the storage cylinder (if tted) should be periodically
checked to ensure there are no blockages.
WARNING
DO NOT drill, screw or x any ancillary items to the of the tank. This product is tted with a high
eciency heat exchanger attached to the inner cylinder, anything penetrating the outer skin of the
tank may damage the heat exchanger.
WARNINGS AND IMPORTANT INFORMATION
Rinnai 10 EHPT Heat Pump OIM - Issue 2
Rinnai’s servicing network personnel are fully trained and equipped to give the best service on your Rinnai
appliance. If your appliance needs service, ring one of the service contact numbers on the back of this booklet.
The pressure and temperature relief valve and expansion control valve (if tted) must be replaced by an authorised
person at intervals not exceeding 5 years or more frequently in areas where the water is classied as scaling water.
If the power supply cord to the heat pump unit is damaged, they must be replaced by an authorised person in order
to avoid a hazard.
Use the following guide to avoid the need for an unnecessary service call.
INSUFFICIENT OR NO HOT WATER
Heat Pump Unit Not Powered Check to ensure the electric isolating switch at the switchboard (usually
marked “Hot water” or “Water heater”) is turned on. (note that the
compressor may not start up for 2 minutes after power is turned on).
Excessive hot water
consumption
Often, end users are surprised at the amount of hot water used, especially
when showering. If the amount of hot water used during the day exceeds
the storage capacity of the cylinder, it is likely there will be insufcient hot
water.
Pressure & Temperature
Relief (PTR) Valve continually
discharging water
It is normal and desirable that this valve allows a small quantity of water
to be discharged during the heating cycle. If it discharges more than a
bucket of water during a 24 hour period or discharges continuously there
may be another problem.
If the valve dribbles continuously, try easing the valve gear for a few
seconds as described in the section ‘Excessive Discharge from Safety
Devices’ on page 8. This may dislodge any foreign matter and alleviate
the problem.
If the valve discharges at high ows, especially at night, it may be as a
result of the water pressure exceeding the design pressure of the water
heater. Ask your installer to t a Pressure Limiting Valve (PLV).
Expansion Control Valve (ECV)
continually discharging water
It is normal and desirable that this valve allows a small quantity of water
to be discharged during the heating cycle. If it discharges more than a
bucket of water during a 24 hour period or discharges continuously there
may be another problem.
If the valve leaks continuously, try easing the valve gear for a few seconds
as described in the section ‘Excessive Discharge from Safety Devices’
on page 8. This may dislodge any foreign matter and alleviate the
problem. If this does not alleviate the problem contact Rinnai.
Ambient conditions too hot To protect the components of the heat pump unit it may not operate when
the ambient temperature is higher than 43°C. The heating element will
operate if water heating is required, but may take longer to heat the water.
Ambient conditions too cold To protect the components of the heat pump unit it may not operate when
the ambient temperature is less than -7°C. The heating element will
operate if water heating is required.
NO WATER FROM THE TAP
Restriction in the hot tap or
failure of the cold water supply
to the water heater
Check for water ow at the other taps and that the cold water isolation
valve is fully open.
SAVE A SERVICE CALL
Rinnai 11 EHPT Heat Pump OIM - Issue 2
HIGH ELECTRICITY BILLS
Excessive hot water
consumption
See entry under the heading ‘Insufcient or no hot water’
High Electricity Taris The electricity tariff will determine the running costs of the system. It is
important the end user is aware of the applicable tariffs. Contact your
electricity supplier to conrm what these tariffs are.
Higher Element Usage In extremely cold conditions the element may be operating more than
normal.
WATER FLOW FLUCTUATIONS
One or more hot taps opened
at the same time
More than one or two hot taps in use at the same time may cause a
decrease in the hot water ow from the taps.
Is there more than one or two hot taps open, or are appliances such as a
dishwasher or washing machine, in use at the same time?
Ensure only one or two hot taps are on at one time.
WATER HAMMER
Hot and cold water plumbing in
the premises
Have a plumber check clipping of hot and cold water pipe work and install
a pressure limiting valve and water hammer arrestor as required.
HEAT PUMP ICES UP
Defrosting function The heat pump has a built in hot bypass defrosting function which may
operate and remove any ice.
HEAT PUMP ERROR INDICATOR
When an Error is detected with the Heat Pump, the “Fault” icon on the display screen will illuminate, and the
setting temperature window displays the current fault code:
FAULT CODES
Fault Code Description Fault Code Description
E1
Water temperature sensor E0 Parameter error fault
E2
High voltage fault EA High temperature protection of
compressor exhaust air
E3
Fin temperature sensor ED Antifreeze protection
E4
Ambient temperature sensor ET The ambient temperature is not
in the operating range of the heat
pump
E5
Return air temperature sensor EE High compressor current
E6
Exhaust temperature sensor EB Low compressor current
E7
Low pressure protection EF Communication fail
E8
Hot water temperature sensor
SAVE A SERVICE CALL
Rinnai 12 EHPT Heat Pump OIM - Issue 2
SYSTEM SPECIFICATIONS
Model EHPT180VM
Net Weight / Filled Weight (kg) 100 / 281
Sound Level 48 dB(A)
Ambient Temperature Limits
(for heat pump operation - element will operate
beyond these limits)
-7°C to 43°C
Ingress Protection
IPX4
Storage Cylinder - Hot Outlet and Cold inlet
Connections
ISO 7.1 ¾” RP
Storage Cylinder - PTR Valve Connection ISO 7.1 ¾” RP
Pressure & Temperature Relief (PTR) Valve
(Supplied) Setting / Rating
850 kPa / 30kW
ECV Fitted
Fit PLV if mains
pressure exceeds
680 kPa
Recommended PLV pressure
rating
500 kPa
ECV Not Fitted
Fit PLV if mains
pressure exceeds
800 kPa
Recommended PLV pressure
rating
500 kPa
Rated Input Electric Element
(Factory Wired)
1.5 kW
Maximum Input Refrigeration Module
(Factory Wired)
0.9 KW
Total Maximum Input 2.4 KW
Maximum Energy Output
(Use to size PTR)
5.5 kW
Power Supply 220-240 V AC, 50 Hz.
Maximum Current 11 Amps (15 Amp plug tted)
Refrigerant Type / Mass R134a / 1 kg
Refrigerant Circuit Maximum Pressure 2700 kPa
Coefcient Of
Performance (COP)
32.6°C Ambient
21.1°C cold water inlet
7.5
Heat Output
32.6°C Ambient
21.1°C cold water inlet
3.1 kW
SPECIFICATIONS
SPECIFICATIONS
Rinnai 13 EHPT Heat Pump OIM - Issue 2
DIMENSIONS
Model EHPT180VM
Cylinder height 1730
Hot Outlet / PTR (A) 1035
Cold water inlet (B) 145
Cylinder diameter 570
All Dimensions in mm
Condensate Drain Outlet
Drain Outlet
Water Inlet
PTR Valve
Water Outlet
(A)
(B)
Diameter
SPECIFICATIONS
Rinnai 14 EHPT Heat Pump OIM - Issue 2
CLEARANCES
Allow 600mm on the plumbing connection side and 200 mm clearance on the fan suction side to allow for sufcient
air ow through the fan.
Model
EHPT180VM
Min Clearance Height H1 (mm) 550
150
200
200
600
600
SPECIFICATIONS
Rinnai 15 EHPT Heat Pump OIM - Issue 2
REGULATIONS AND OCCUPATION HEALTH AND SAFETY
(
OH&S
)
WARNING
Installation and commissioning MUST be performed by authorised persons.
The heat pump MUST be installed in accordance with these instructions and all regulatory
requirements which exist in your area including those in relation to manual lifting.
Applicable publications and regulations may include:
•
AS/NZS 3500 National Plumbing and Drainage
•
AS/NZS 3000 Wiring Rules
•
Building Codes of Australia (BCA)
•
Local Occupational Health and Safety (OH&S) regulations
This appliance is not suitable for use as a domestic spa pool or swimming pool heater.
Electric Heat pumps are heavy and bulky items. Australian States and Territories have Principal
Occupational Health and Safety (OH&S) Acts with requirements relating to handling of large, bulky
or awkward items. Persons installing heat pump systems MUST be aware of their responsibilities
and be adequately trained and qualied, in accordance with local OH&S requirements.
LOCATION
The electric heat pump can be installed externally or internally.
The electric heat pump should be placed as close as practicable to the most frequently used hot water outlet point
or points to minimize the delay time for hot water delivery. This will usually be the kitchen tap. For installations
where the distance between the heat pump and the outlets is considerable, a ow and return system can be used
which minimize the waiting time for hot water delivery.
It is recommended that all components are installed at ground or oor level with consideration for easy service,
repair or replacement access.. The heat pump MUST be installed in a vertically upright position. All components
MUST be accessible without the use of a ladder or scaffold. The unit MUST NOT be installed in roof spaces.
The air inlet and outlet of the heat pump module MUST be away from areas with strong wind and MUST be
provided with sufcient clearances as per those shown in the section 'Clearances' on page 14.
The heat pump MUST be connected to an independent AC 240 V, 50 Hz power supply.
Ensure the pressure and temperature pressure relief (PTR) valve and any access covers have sufcient clearances
and are accessible for service and removal. The information on the rating plates MUST also be readable.
The heat pump MUST be installed free-standing on a level and stable base no more than 2° off perpendicular to
level ground. The cylinder should be mounted on a concrete base at least 50mm thick or on, evenly spread hardwood
slats with a thickness of at least 25mm. Where property damage can occur as a result of water leakage, the storage
cylinder MUST be installed with a safe tray (overow tray) at least 50mm larger than the diameter of the water
heater and drain in accordance with AS 3500.4. Ensure the storage cylinder DOES NOT stand on wet surfaces.
Max 2°
INSTALLATION
Rinnai 16 EHPT Heat Pump OIM - Issue 2
Internal Installation
For internal installations the area MUST meet the following requirements:
•
Minimum room volume of 10m
3
per unit.
•
Good Ventilation (i.e minimum 200 L/s per unit)
•
Away from any ignition sources or corrosive environments.
If the heat pump is installed internally careful consideration should be taken in regards to positioning and limiting
the effect of unit noise and reverberation during operation.
WARNING
Ensure the location complies with the requirements of AS/NZS 60335.2.40 & AS / NZS 5149.
Condensation
As this heat pump is highly efcient the surrounding air temperature could be cooled by up to 4°C and condensate
formed, the condensate will need to plumbed to a suitable drain.
Drainage
Where property damage can occur as a result of water leakage, the water heater MUST be installed with a safe
tray (overow tray) and drain. Construction, installation and draining of the safe tray MUST comply with local
regulatory requirements and. AS/NZS 3500.4 also requires the use of a safe tray for particular situations.
WATER SUPPLY
This appliance is intended to be permanently connected to the water mains and not to be connected by a hose set.
The maximum water pressure is listed on page 12. An approved pressure limiting valve may be required if the
maximum rated water supply pressure is exceeded.
Water chemistry and impurity limits are detailed in the separate warranty document. Most metropolitan water
supplies fall within these requirements. If you are unsure about water quality and suitability, contact your water
authority.
A water lter MUST be tted on the inlet to the tank to prevent sludge or foreign matter entering the system.
In a scaling water supply, calcium carbonate and possibly other compounds are deposited out of the water onto
any hot metallic surface and form a scale. Scaling water may cause scale deposits to form onto the metallic
surfaces of the PTR valve and may prevent it from operating properly. To prevent this, an Expansion Control Valve
(ECV) MUST be tted on the cold water line after the non-return valve in areas of scaling water. ECVs MUST be
tted in South Australia and Western Australia to comply with local regulations.
STORAGE TEMPERATURE
To meet regulatory requirements the thermostat control on the heat pump water heater is factory pre-set to 60°C.
It is recommended that this temperature is not altered.
HOT WATER DELIVERY TEMPERATURE
This appliance may deliver water at high temperature. Refer to the Plumbing Code of Australia (PCA), local
requirements and installation instructions to determine if additional delivery temperature control is required.
The PCA, local regulations and the requirements of AS/NZS 3500.4 MUST be considered regarding the
temperature limitations of hot water supplied to areas used primarily for personal hygiene.
The temperature of water to certain areas is limited to different temperatures according to purpose, for e.g. early
childhood centres, primary and secondary schools and nursing homes or similar facilities for young, aged, sick
or people with disabilities and for all other buildings. To comply with these requirements, a temperature limiting
device, such as a thermostatic mixing or tempering valve, will be required on hot water systems.
INSTALLATION
Rinnai 17 EHPT Heat Pump OIM - Issue 2
VALVES AND FITTINGS
IMPORTANT
A 30 kW capacity, combined Pressure and Temperature Relief (PTR) valve is supplied with the
Heat Pump hot water system. This valve is tted at the top of the storage cylinder. The PTR valve
is a safety device and it is mandatory that it is tted by the installer in all installations.
The following valves & ttings are to be supplied by the installer:
•
A cold water Expansion Control Valve (ECV). An ECV MUST be tted in Western Australia and South
Australia to the cold water supply to the storage cylinder to comply with local regulations. An ECV is
recommended in all other geographical areas where the water supply has a tendency to cause scaling. This
will reduce hot water discharge from the pressure and temperature relief (PTR) valve which minimises wear
on this valve.
•
A stop cock, non return valve and line strainer. Combination valves incorporating two or more of these
functions (such as ‘Trio’ valves) are suitable. These are tted to the cold water supply to the storage cylinder
by the installer.
•
Cold water supply and hot water discharge pipework to and from the storage cylinder. This pipework MUST
be insulated as specied in AS/NZS3500.4
•
An approved pressure limiting valve (supplied with some systems) is required if the maximum rated water
supply pressure on page 12 is exceeded.
•
Tempering valve(s) or thermostatic mixing valve
TRANSPORT AND HANDLING
IMPORTANT
When moving the unit, it MUST be close to vertical at all times.
When using a trolley to move the unit, ensure it is not tilted more than 45° from the vertical.
Non compliance will void warranty and severely aect product performance and operation
The Rinnai Electric Heat Pump MUST be transported
at an angle no greater that 45º from vertical.
As the compressor unit is located at the top of the
electric heat pump, should the heat pump be tilted at a
greater angle than 45º from vertical, the lubrication oil
within the compressor can run down into the mufers.
This will leave the compressor motor without sufcient
lubrication and lead to premature failure of the
compressor unit.
As a general good practice it is better to keep the
compressor upright as much as possible to avoid any
risks. Returning the Rinnai Electric Heat Pump to a
vertical position will allow the oil to properly ow back
into the compressor motor.
Tilting the heat pump beyond 45º from vertical will also
place undue strain on compressor motor mounts and
associated piping.
45°
Never tilt unit more than 45˚ from vertical
INSTALLATION
Rinnai 18 EHPT Heat Pump OIM - Issue 2
POSITIONING THE HEAT PUMP
Arrive at site and conduct a safety audit (Safety audits can also be
known as Work Method Statements (WMS) or Job Site Analysis (JSA).
Park your vehicle as close as allowable to your installation. Unload all
materials in a safe manner.
Position all materials in a convenient position near the work area.
Refer to "Location" on page 15 positioning consideration and
requirements for all installations. Where the requirements for internal
installation can’t be met, the heat pump MUST be installed outdoors.
The location MUST also consider noise impact on living areas. Avoid
positioning near bedrooms or neighbours’ bedrooms. Although the
running noise level is very low it can be expected that the heat pump will
run during the night.
Adequate access MUST be available to the relief valve and anode.
Safely position the new unit on a level surface in accordance with all
plumbing and building regulations.
A properly drained overow tray MUST be used where property
damage could occur from water spillage. (See AS/NZS3500.4.2 for
further details.)
NOTE
DO NOT drain on to grass or garden beds.
DO NOT commence a job where the risks cannot be
controlled.
Ensure the requirements specied in the section ‘Clearances’ on page
14. are complied with. The area MUST also be clear of debris such
as leaves and tree branches.
Install a plinth under the heat pump
where it is subjected to wet conditions
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Optimum installation location is on the
warmest side of house.
CONNECT THE PTR VALVE
Connect the PTR valve to the uppermost tting of the storage cylinder. See the diagram on page the section
‘Dimensions’ on page 13.
The PTR pressure rating MUST be suited for the cylinder and adequate for the thermal loading applied to the
storage cylinder, as specied in the table on 12. The supplied PTR valve input rating is 30.0 kW. The PTR valve
rating MUST EXCEED the total input from the heat pump. For example, the maximum output is 5.5 kW (see the
table on page 12). This is less than 30.0 kW, hence the supplied PTR valve is of sufcient capacity.
Use Teon thread tape on the valve, never use hemp or other sealing materials. Ensure the tape does not protrude
past the end of the thread, which could result in it hanging over the end of the thread and blocking the water
passage through the valve.
Connect the supplied PTR valve into the top socket marked “Relief Valve”. Leave the valve outlet pointing down.
Tighten the valve using the spanner ats - never use the valve body. Discharge according to plumbing regulations.
PTR Valves for the unit are rated at 850kpa.
The drain line from this valve MUST run in a continuously downward direction with the discharge end left
permanently open to atmosphere.
PLUMBING CONNECTIONS
Refer to the diagram on page 20 for detailed information on position of plumbing.
An approved isolating valve, non return valve, line strainer, and union MUST be tted between the supply main
and the RP ¾ socket in the water heater. All ttings MUST be approved by the relevant installation Authority.
An ECV MUST be tted in Western Australia and South Australia to the cold water supply to the storage cylinder
to comply with local regulations.
An ECV is recommended in all other geographical areas where the water supply has a tendency to cause scaling.
INSTALLATION
Rinnai 19 EHPT Heat Pump OIM - Issue 2
This will reduce hot water discharge from the pressure and temperature relief (PTR) valve which minimises wear
on this valve.
This water heater is designed for direct connection to water supply pressures of no greater than those specied
on page 12. Where the mains pressure can exceed or uctuate beyond this, a pressure limiting (PLV) device
(complying with AS1357) MUST be tted.
CONNECT COLD / HOT WATER SUPPLY
Connect cold water supply, Pressure Limiting Valve (PLV) and or Expansion Control Valve (ECV).
Connect cold water supply to the storage tank (refer to Diagram BELOW).
A stop cock, non return valve and line strainer MUST be tted.
Connect the pipe work supplying hot water to the premises to the hot water outlet on the tank.
A temperature limiting device may be required as detailed in the section the section ‘Hot Water Delivery Temperature’
on page 16
It is recommended that all hot water lines are insulated with high temperature, UV resistant 13mm closed cell
insulation.
CONNECT CONDENSATE DRAIN LINE
A condensate drain line is required to be tted to carry discharge clear of the water heater.
The condensate drain line should not be connected to the PTR drain line but can exit to the same point.
The diagram below shows the location of the condensate drain on the heat pump. Use the supplied PVC pipe
(inner diameter 9mm, UV resistant) to connect to the condensate outlet.
Independent 15mm copper pipes MUST be tted to the drain outlets of the PTR and ECV.
Each pipe MUST be open to atmosphere and run with a continual downward grade in a frost free environment to
a visible discharge point.
Drain lines MUST not exceed 9 meters in length.
Valves or other restrictions MUST NOT be placed in the relief valve drain outlet line.
D ra in
Union Connection
Non-return ValveLine Strainer
Cold Water Inlet
Isolating Valve (Spindle Vertical)
Cold water expansion
control valve
INSTALLATION
Rinnai 20 EHPT Heat Pump OIM - Issue 2
TYPICAL PLUMBING LAYOUT
PTR Valve
EHPT180VM
Water Outlet
Water InletDrain Port
Check Valve
Y-Type Filtration
ELECTRICAL CONNECTIONS
WARNING
The power supply to the heat pump module MUST NOT be activated until the system is lled
with water.
The premises wiring to the heater MUST be capable of withstanding the appliance load. Refer
to specication table for load details.
All electrical connections and wiring MUST be installed, maintained and removed by authorised
persons in accordance with AS/NZS 3000, and all other relevant local regulations and municipal
building codes including OH&S requirements.
IMPORTANT
The Heat Pump is tted with a power cord & 15 amp plug, It MUST connect to an independent,
fused, AC 240V 50 Hz power supply with an isolating switch installed at the switch board, which
shall eectively isolate all active supply conductors from the circuit and means for disconnection
MUST be incorporated in the xed wiring in accordance with the wiring rules.
A Residual Current Circuit Breaker is recommended for the power supply to this appliance (this
may be a mandatory requirements in some states or jurisdictions).
INSTALLATION
Rinnai 21 EHPT Heat Pump OIM - Issue 2
IMPORTANT
This appliance MUST NOT be connected via a switchable or a solar (photovoltaic - PV)
power supply without manufacturer consultation and authorisation.
The switching of the supplies will place the water heater into a re-start cycle which reduces
the available heating time and may result in a lack of hot water.
It is recommended this appliance is connected to either a 24 hour continuous tari or an
extended o-peak power supply (minimum 16 hours per day), noting that the minimum
required running time is governed by hot water demand and the climate zone.
If this appliance is replacing an electric water heater with a capacity of 250 litres (or greater),
then a connection to a 24 hour continuous tari supply is recommended.
Disconnect all power prior to installation and commissioning.
This appliance is designed for single phase 240 Volts, AC mains electrical operation.
Cord Management
Make sure that the power cord attaches to the power outlet at a point higher than it exits the appliance (1).
Alternatively loop the cord (2) so that any water is not directed to the the power socket.
1. Mount socket outlet higher than cord outlet
2. Loop applance cord
WIRING SCHEMATIC
INSTALLATION
Rinnai 22 EHPT Heat Pump OIM - Issue 2
ELECTRICAL TESTS
DO NOT turn on the power supply to the appliance until it has been lled with water and a satisfactory insulation
(Megger) test has been performed.
Conducting Insulation (Megger) Tests
When conducting an insulation test using a Megger on this appliance, observe the then the following:
WARNING
This appliance contains electronic components, when performing insulation tests (500 Volts)
this MUST ONLY be conducted the across active terminal to earth and then across the neutral
terminal to earth.
Tests between the active to neutral terminals MUST NOT be performed as this WILL damage
the electronic components.
Insulation test results of between 100 kΩ and 660 kΩ are normal for this appliance.
In accordance with AS/NZS 3000 an insulation test with a result less than 1 MΩ is permitted where the appliance
is approved to a Standard applicable to that class of appliance.
This appliance is categorised and certied as a ‘stationary Class 1 motor operated appliance’ and therefore
satises the requirements of AS/NZS 60335.2.40 for leakage current and electric strength. As such, this appliance
complies with the insulation resistance requirements of AS/NZS 3000.
FILLING THE SYSTEM
Open hot water tap at sink.
Open the stop cock in the cold water main supply line. Allow the system to ll and the air to bleed through the tap.
Turn off the hot tap at the sink when water ows freely without any air bubbles or air bursts.
Bleed any remaining air from the PTR valve.
If leaks are detected turn off power to the heat pump, repair any leaks and repeat the lling process to remove any
air.
If no leaks are detected water heating can commence. The heat pump will start up after the 2 minute protection
delay.
COMMISSIONING AND FINISHING THE INSTALLATION
IMPORTANT
Please conrm the following before commissioning:
● Piping and electrical wiring are all correct
● Earthing wire is installed properly
● Pipe insulation is completed
● Tank is lled
● Supply Voltage complies with rated voltage
● Air intake and discharge are not obstructed
Turn on power to the heat pump unit and wait a few seconds for the system to start. Change operation mode or
water temperature setting if required (it is recommended to retain default setting however).
After testing is completed, explain to the customer the functions and operation of heat pump water heater
components. Explain the need to drain the heat pump if freezing conditions are likely or power is likely to be shut
off for an extended time.
Also explain to the customer the importance of carrying out maintenance in accordance with this manual. Leave
the manual with them upon completion of the installation.
WARNING
DO NOT drill, screw or x any ancillary items to the of the tank. This product is tted with a high
eciency heat exchanger attached to the inner cylinder, anything penetrating the outer skin of the
tank may damage the heat exchanger.
INSTALLATION
Rinnai 23 EHPT Heat Pump OIM - Issue 2
CONTROLLER LAYOUT
Controller Icons
Icon Description Icon Description
Eco Mode Compressor State
Hybrid Heating Mode Electric Heating State
Electric Heating Mode Child Lock
Temperature Setting Tank Temperature
Fault Warning Wi-Fi State
Timer Clock Display
Control Keys
Key Symbols
ON/OFF
MODE
LOCK
TIMER
SET
Function Power On/Off Mode / Lock Timer Settings
Temperature
Up
Temperature
Down
When the unit is powered on, all the symbols will be displayed for approximately 2 seconds.
SET
TIMER
MODE
LOCK
ON/OFF
OPERATION
Rinnai 24 EHPT Heat Pump OIM - Issue 2
OPERATING FUNCTIONS
On / OFF
ON/OFF
•
In standby mode, press the ‘on/off’ key once to perform the startup function and display the
mode before the last shutdown.
•
In the start-up mode, press the ‘on/off’ key once to shut down the appliance.
•
Press ‘SET’ and ‘On/Off’ together and hold for 3 seconds to enter the Wi-Fi setting functions.
Mode / Lock
MODE
LOCK
Press the ‘MODE’ key to cycle between Modes in this sequence: ECO HYBRID E-HEATER
•
Eco mode: The unit is set to economy mode, the hot water temperature is adjustable in the
range of 30-60°C , the compressor is running at 30-60°C.
•
Hybrid heating mode: The unit is set to hybrid heating mode. The hot water temperature is
adjustable in the range of 30-70°C. The compressor and electric heating are running at 30-
60°C, and the electric heating is running at 60-70°C.
•
Electric heating mode: The hot water temperature is adjustable in the range of is 30-70°C, the
electric heating will be operated within this range.
Every time the unit is powered on it will automatically enter the last operational mode it was in before
shutdown.
Locking function
•
Press and hold the ‘MODE LOCK’ key for 3 seconds to activate the child lock. Press and hold
again for 3 seconds to release the lock.
Timer
TIMER
Timer setting
•
Press the “TIMER” key for 3 seconds and then release to enter the time setting. The hours and
minutes in the time display area will ash at the same time. Press the “TIMER” key again, and
the hours in the time display area ash. Press the “up” key or “down” key to adjust the hours;
Press “SET”, and the minutes in the time display area will ash. Press the “up” key or the
“down” key to adjust the minutes; After the time setting, press the “SET” key to save and exit.
Timed start-up
•
When there is no timing setting in the normal interface, press the “TIMER” key once to enter
the timed startup setting interface and timer symbol in the time area will ash, and “ON” is
displayed in the temperature area of the water tank. The default time display is 00:00, and the
hour area ashes. Press the “SET” key to switch to the minute setting, and the minute area
ashes. Then press the “SET” key to switch to the timed shutdown setting.
Timed shutdown
•
The timer symbol in the time area ashes, and “OFF” is displayed in the temperature area of
the water tank. The default time display is 00:00, and the hour area ashes. Press the “SET”
key to switch to the minute setting, and the minute area ashes. Then press the “SET” key to
save the timer setting.
Cancel timing
•
When the timer is active, press the “TIMER” key once to cancel the timing.
OPERATION
Rinnai 25 EHPT Heat Pump OIM - Issue 2
Settings
SET
The key is used in timed startup and timed shutdown setting, see the previous timing setting
operation for details;
•
Press and hold the “SET” key for 3 seconds to enter the parameter inquiry page.This function is
mainly intended for use by qualied installation and maintenance personnel. See the following
table for parameter details:
Code Description Number Remarks
Tank temperature 1 (Thw 1) 01 Unit: °C
Tank temperature 2 (Thw 1) 02 Unit: °C
Ambient temperature (Ten) 03 Unit: °C
Fin temperature (Tfr) 04 Unit: °C
Compressor exhaust temperature (Tcomp) 05 Unit: °C
Return temperature 06 Unit: °C
Current of compressor 07 Unit: Amps
Current opening state of electronic expansion valve 08 States: Open/Closed
Set mode 09 00-Eco Heat, 01-Hybrid Heat, 02-Electric Heat
Heating set temperature (Ts) 10 Unit: °C
Display water temperature 11 Unit: °C
Controller version number 12 Example: A05
Controller version number 13 Example: A01
Jumper cap setting model number 14 Examples: 01 02 03
Last fault code 15 Example: E1
Second last fault code 16 Example: E1
Third last fault code 17 Example: E1
Fourth last fault code 18 Example: E1
Temperature Up/Down
•
“Temperature▲”: The set temperature is increased by 1°C
•
“Temperature▼”: the set temperature is decreased by 1°C
•
During operation, enter the sequence “[ ▲ ] - [ ▼ ] - [ ▲ ] - [ ▼ ] - [ ▲ ] - [ ▼ ]“ within 5 seconds
to initiate forced defrosting.
OPERATION
Rinnai 26 EHPT Heat Pump OIM - Issue 2
WI
-
FI CONNECTION
Please follow below steps to set up and operate Wi-Fi functions.
1. Prepare a Wi-Fi wireless router that can access the Internet, The Wi-Fi frequency band is required to be
2.4 Ghz and it should be placed within 10 meters of the water heater to ensure that a strong Wi-Fi signal is
available.
2. Turn on Wi-Fi and Bluetooth on your device. After the connection is successful, you can turn off Bluetooth
and operation will not be affected.
3. Scan the QR code below or search in the app market to download and install the ‘Smart Life’ App.
•
iOS users – please download from App Store
•
Android users – please download from Google Play
4. After completing the installation, open the App, register an account and log in according to the App prompt.
5. Power on the water heater, press ‘Setting’ and ‘On/Off’ together and hold for 5 seconds to enter the Wi-Fi
setting functions. The Wi-Fi icon on the display will be ashing.
NOTE
Wi-Fi connecting is available for 3 minutes. You will need to repeat step 5 if the icon stops ashing
during the connection
6. Connect to the SmartLife App as follows:
1.
2.
i) Search for Device ii) Add Found Device iii) Connect to Wi-Fi
OPERATION
OPERATIONOPERATION
Rinnai 27 EHPT Heat Pump OIM - Issue 2
Connect to SmartLife App (cont).
iv) Wait for Connection v) Complete vi) Device Connected
7. Control the Heat Pump with the App
The main controls for the App are laid out as follows on the App.
Select
Mode
Turn
On/Off
Timer /
Check Operation
Adjust Temp
Setting
OPERATION
S112467 28 EHPT Heat Pump OIM - Issue 2 - March 2023
CONTACTS
Rinnai Australia Pty Ltd
ABN 74 005 138 769 | AU45204
100 Atlantic Drive, Keysborough, Victoria 3173
P.O. Box 460, Braeside, Victoria 3195
Tel: (03) 9271 6625
Fax: (03) 9271 6622
National Help Line
Tel: 1300 555 545* Fax: 1300 555 655
Monday to Friday, 8.00 am to 5.00 pm EST.
After Hours Hot Water Service Line
Tel: 1800 000 340*
*Cost of a local call may be higher from a mobile phone.
(National calls from public phones in Australia are free.)
For further information visit www.rinnai.com.au
or email [email protected]
Rinnai has a Service and Spare Parts network with
personnel who are fully trained and equipped to give
the best service on your Rinnai appliance. If your
appliance requires service, please call our National
Help Line. Rinnai recommends that this appliance be
serviced every 3 years.
With our policy of continuous improvement, we
reserve the right to change, or discontinue at any time,
specifications or designs without notice.
