Models: EYF18, EYF24
Natural Gas or Propane/LPG
Control Type: Manual or Millivolt
Unvented Gas Log Heater
or
Vented Decorative Appliance
LO
HI
OFF
ON
I
G
N
651009
EYF cover
WARNINGS
If the information in this manual is 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 instructions.
• If you cannot reach your gas supplier,
call the re department.
– Installation and service must be performed
by a qualied installer, service agency or
the gas supplier.
This is an unvented gas-red heater. It uses
air (oxygen) from the room in which it is
installed. Provisions for adequate combustion
and ventilation air must be provided.
Refer to Page 5.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
Installation and
Operating Instructions
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
2
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
CONTENTS
Important Safety Information ......................................3
Getting Started ..............................................................5
Product Features and Specications .........................5
Fireplace and Hearth Dimensions...............................6
Placement in a Fireplace with a Restrictive Barrier ..6
Adequate Combustion Ventilation Air ........................7
Clearances and Height Requirements ........................8
Floor Clearance ..........................................................10
Fireplace Preparation .................................................10
Installing Vented Appliance .......................................10
Gas Line Connection ..................................................12
Checking Gas Pressure .............................................12
Electrical Wiring (Millivolt) .........................................13
Connect Optional Remote Receiver ...................14
Log Placement ............................................................15
Flame Appearance ......................................................18
Pilot Flame Appearance .........................................18
Burner Flame Appearance .....................................19
Operating Instructions ...............................................19
For Your Safety Read Before Lighting ...................20
Manual Control Lighting Instructions ......................21
Millivolt Control Lighting Instructions ......................22
Match Lighting Instructions ....................................23
Maintenance ................................................................23
Troubleshooting .........................................................24
Service Parts ...............................................................26
Massachusetts Only ...................................................32
Warranty ......................................................................33
Thank you and congratulations on your purchase of a
Gas Log Set
PLEASE READ THE INSTALLATION AND OPERATION INSTRUCTIONS BEFORE USING THE APPLIANCE!
IMPORTANT: Read all instructions and warnings carefully before starting installation.
Failure to follow these instructions may result in a possible re hazard and will void the warranty.
CARBON MONOXIDE POISONING: Early signs of carbon monoxide poisoning are similar to the u with headaches,
dizziness and/or nausea. If you have these signs, the insert may not have been installed properly. Get fresh air at
once! Have the insert inspected and serviced by a qualied service person. Some people are more aected by carbon
monoxide than others. These include pregnant women, people with heart or lung disease or anemia, those under the
inuence of alcohol, and those at high altitudes.
Propane/LP gas and natural gas are both odorless. An odor-making agent is added to each of these gases. The odor
helps you detect a gas leak. However, the odor added to these gases can fade. Gas may be present even though
no odor exists.
NOTE: Monessen vent free gas logs are hand painted
for ultimate beauty and realism. As a result, some
variation in color and shading will occur from set to set.
This is intentional and designed to make each product
unique, as found in nature.
►
►
3
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
IMPORTANT SAFETY INFORMATION
INSTALLER
Please leave these instructions with the appliance.
OWNER
Please retain these instructions for future reference
.
WARNING
• Any change to this heater or its controls can be dangerous.
• Improper installation or use of the heater can cause serious injury or
death from re, burns, explosion or carbon monoxide poisoning.
• Do not allow fans to blow directly into the replace. Avoid any drafts that
alter burner ame patterns.
• Do not use a blower insert, heat exchanger insert or other accessory,
not approved for use with this heater where applicable.
1. Due to high temperatures, the appliance should be
located out of trac and away from furniture and
draperies.
2. Children and adults should be alerted to the hazard
of high surface temperature and should stay away
to avoid burns or clothing ignition.
3. Young children should be carefully supervised when
they are in the same room with the appliance.
4. Do not place clothing or other ammable material
on or near the appliance.
5. Any safety screen or guard removed for servicing
an appliance, must be replaced prior to operating
the heater.
6. Installation and repair should be done by a qualied
service person.
7. To prevent malfunction and/or sooting, an unvented
gas heater should be cleaned before use and at
least annually by a professional service person.
More frequent cleaning may be required due to ex-
cessive lint from carpeting, bedding materials, etc.
It is imperative that control compartments, burners
and circulating air passageways be kept clean.
12. Correct installation of the ceramic ber logs, proper
location of the heater, and annual cleaning are neces-
sary to avoid potential problems with sooting. Sooting,
resulting from improper installation or operation, can
settle on surfaces outside the replace. See log place-
ment instructions for proper installation.
13. Avoid any drafts that alter burner ame patterns. Do not
allow fans to blow directly into replace. Do not place
a blower inside burn area of rebox. Ceiling fans may
create drafts that alter burner ame patterns. Sooting
and improper burning will occur.
14. CAUTION: Candles, incense, oil lamps, etc. produce
combustion by-products including soot. Vent-free
appliances will not lter or clean soot produced by
these types of products. In addition, the smoke and/or
aromatics (scents) may be reburnt in the vent-free ap-
pliance which can produce odors. It is recommended
to minimize the use of candles, incense, etc. while the
vent-free appliance is in operation.
15. This is an unvented gas-red heater. It uses air (oxy-
gen) from the room in which it is installed. Provisions
for adequate combustion and ventilation air must be
provided. Page 6
16. This heater shall not be installed in a room or space
unless the required volume of indoor combustion air is
provided by the method described in the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, the International
Fuel Gas Code or applicable local codes.
17. Keep room area clear and free from combustible
materials, gasoline and other ammable vapors and
liquids.
18. Unvented gas heaters are a supplemental zone heater.
They are not intended to be a primary heating appli-
ance. Water vapor produced by an unvented heater
can create moisture problems in a home when oper-
ated for extended periods of time.
19. During manufacturing, fabricating and shipping, various
components of this appliance are treated with certain
oils, lms or bonding agents. These chemicals are not
harmful but may produce annoying smoke and smells
8. For propane/LP insert, do not place propane/LP supply
tank(s) inside any structure. Locate propane/LP supply
tank(s) outdoors. To prevent performance problems,
do not use propane/LP fuel tank of less than 100
lbs. capacity.
9. The installation must conform with local codes or, in
the absence of local codes, with the National Fuel
Gas Code, ANSI Z223.l/NFPA54.
10. This unit complies with the latest edition of ANSI
Z21.11.2, Unvented Heaters and also complies with
ANSI Z21.60 Decorative Vented Appliances for Solid
Fuel Burning Fireplaces. State and local codes may
only allow operation of this appliance in a vented con-
guration. Check your state or local codes. For vented
operation, see Vented Instructions in this manual.
11. Do not install the heaters in a bathroom or bedroom.
4
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
IMPORTANT SAFETY INFORMATION
as they are burned o during the initial operation of the
appliance; possibly causing headaches or eye or lung
irritation. This is a normal and temporary occurrence.
The initial break-in operation should last two to three
hours with the burner at the highest setting. Provide
maximum ventilation by opening windows or doors to
allow odors to dissipate. Any odors remaining after this
initial break-in period will be slight and will disappear
with continued use.
20. Input ratings are shown in BTU per hour and are for
elevations up to 2,000 feet. For elevations above 2,000
feet, input ratings should be reduced 4 percent for each
1,000 feet above sea level. See the National Fuel Gas
Code.
21. The heater and its individual shuto valve must be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures
in excess of 1/2 psig (3.5 kPa).
22. The heater must be isolated from the gas supply piping
system by closing its individual manual shuto valve
during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 psig
(3.5 kPa).
23. Do not use this room heater if any part has been under
water. Immediately call a qualied service technician
to inspect the room heater and to replace any part of
the control system and any gas control which has been
under water.
24. This appliance must not be used with glass doors in
the closed position. This can lead to pilot outages and
severe sooting outside the replace.
25. Never burn solid fuels in a replace where a unvented
room heater is installed.
25. Always have a replace screen in place when the ap-
pliance is in operation and , unless other provisions for
combustion air are provided, the screen shall have an
opening(s) for induction of combustion air.
This appliance may be installed in an after-
market, permanently located, manufactured
(mobile) home, where not prohibited by local
codes.
This appliance is only for use with the type
of gas indicated on the rating plate. This ap-
pliance is not convertible for use with other
gases.
WARNING
Never connect unit to private (non-utility)
gas wells. This gas is commonly known
as wellhead gas.
Attention Massachusetts Residents:
This product must be installed by a licensed
gas tter.
CODES
Adhere to all local codes or, in their absence, the latest
edition of THE NATIONAL FUEL GAS CODE ANSI Z223.1
or NFPA54 which can be obtained from…
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
or
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
WARNING
If the area in which the heater may be
operated does not meet the required volume
for indoor combustion air, combustion and
ventilation air shall be provided by one
of the methods described in the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, the
International Fuel Gas Code or applicable
local codes.
WARNING: This product and the
fuels used to operate this product (liquid
propane or natural gas), and the products
of combustion of such fuels, can expose
you to chemicals including benzene, which
is known to the State of California to cause
cancer and reproductive harm. For more
information go to: www.P65Warnings.
ca.gov.
5
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
WARNING
• Gloves are recommended when
handling ceramic ber logs to prevent
skin irritation from loose bers.
• Logs are fragile - handle with care.
MAKE SURE YOU HAVE RECEIVED ALL
PARTS:
Check your packing list to verify that all listed parts have
been received. You should have the following:
• Unvented gas log burner assembly
• Plastic bag containing crushed volcanic rock
• Installation/operating instructions
• Two (2) anchoring screws
• Grate
The millivolt controlled version of this heater is the only
style designed to be operated with optional devices for
ON/OFF functions. The following options may be used
with the millivolt controlled heater. These options are not
packaged with the log set.
• Hand held Remote with receiver
• Wall thermostat with 15' wire
• Wall switch with 15' wire
• Hand held Thermostat Remote with receiver
Carefully inspect the contents for shipping damage. If any
parts are missing or damaged, immediately inform the
dealer from whom you purchased the appliance. Do not
attempt to install any part of the appliance unless you
have all parts in good condition.
WHAT YOU WILL NEED FOR INSTALLA-
TION:
You must have the following items available before pro-
ceeding with installation:
• External regulator (for propane/LPG and 1/2 lb.
natural gas systems only)
• Piping which complies with local codes
• Screwdriver
• Drill with 5/32 bit
• Manual shuto valve
• Pipe sealant approved for use with propane/LPG
(Resistant to sulfur compounds)
• Pipe wrench or appropriate size crescent wrench
set
• Tee joint.
• Sediment trap
GAS SPECIFICATIONS
Gas Rate
Max.Input Min. Input
Model Fuel Control BTU/h BTU/h
EYF18NM Nat. Manual 30,000 18,000
EYF18NV Nat. Millivolt 30,000 26,000
EYF18PM LP Manual 30,000 22,500
EYF18PV LP Millivolt 30,000 24,500
EYF24NM Nat. Manual 36,000 19,000
EYF24NV Nat. Millivolt 36,000 24,000
EYF24PM LP Manual 36,000 25,000
EYF24PV LP Millivolt 36,000 29,000
*NOTE: An external regulator is required to reduce supply pres-
sure to a maximum of 13” w.c.
GAS PRESSURES
Control Fuel Manual Millivolt
Regulator Pressure Nat. 4.0” w.c. 3.5” w.c.
Pilot Regulator Nat. n/a 3.5” w.c.
Max. Inlet Pressure Nat. 10.5” w.c. 10.5” w.c.
Min. Inlet Pressure Nat. 5.0” w.c. 5” w.c.
Regulator Pressure LP 10.0” w.c. 10.0” w.c.
Max. Inlet Pressure LP 13.0” w.c. 13.0” w.c.
Min. Inlet Pressure LP 11.0” w.c. 11.0” w.c.
IGNITION CONTROLS
Piezo ignitor allows ignition of the pilot without the use of
matches or batteries.
Manual control has three (3) positions:
OFF - All gas to the gas logs is shut o at the valve.
IGN - Valve position to light/maintain a standing pilot.
HI/LOW - Variable position corresponding to desired
ame height (heat input)
Millivolt control has four (4) positions:
OFF - All gas to the gas logs is shut o at the valve.
IGN - Valve position to light/maintain a standing pilot.
ON - Valve position to turn ON/OFF log set with remote
switch/thermostat.
HI/LOW - Variable position to control ame height (heat
output).
PILOT
The gas log heater is tted with a specially designed safety
pilot light (ODS assembly) which senses the amount of
oxygen available in the room and shuts the gas log heater
o if the oxygen level begins to drop below a satisfactory
level. The pilot can only be relit when adequate fresh air
is available.
THERMAL GENERATOR
The millivolt gas log pilot is tted with a millivolt generator
to provide power for remote activation.
GETTING STARTED - FEATURES and SPECIFICATIONS
6
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
FIREPLACE and HEARTH DIMENSIONS
WARNING
This appliance has been specically tested
and design certied for installation only
in a solid-fuel burning replace including
factory-built UL127 replaces and masonry
replaces, or in a listed ventless rebox
(see below).
Exception: DO NOT install this appliance
in a factory-built fireplace that includes
instructions stating that it has not been
tested or should not be used with unvented
gas logs.
Use manufacturer's installation and clearance requirements
as dened in their manual.
The EYF Series unvented room heater is approved for
installation into the following unvented replaces:
GCUF(32,36,42) and VFR(32,36,42) Series Fireboxes
The EYF Series unvented room heater may also be in-
stalled into a Ventless Firebox Enclosure for Gas Fired
Decorative Type Unvented Room Heaters per ANSI
Z21.91b.2004, as long as rebox hearth dimensions meet
the minimum hearth dimensions shown below.
C
A
D
B
FP2530
hearth dims
Figure 1 -
Hearth Minimum Dimension for Solid Fuel Burning
Fireplaces and UL127 Factory Built Fireplaces
Model A B C D
EYF18 25" 13" 17Z\x" 17"
(635 mm) (330 mm) (445 mm) (433 mm)
EYF24 w/ 29" 13" 19Z\x" 17"
EYF24-(R,F) (737 mm) (330 mm) (495 mm) (433 mm)
EYF24 w/ 33" 13" 25Z\v" 17"
EYF30-R (838 mm) (330 mm) (641 mm) (433 mm)
FP2530
IMPORTANT INFORMATION FOR THE INSTAL-
LATION OF THIS GAS LOG SET IN A FIRE-
PLACE WITH A RESTRICTIVE BARRIER
The following are guidelines for placing a gas log set in
a replace that has a restrictive barrier along the bottom
front opening of the replace. Some examples of barri-
ers are glass/screen door frames and sunken/recessed
replaces.
Height of Minimum Depth of
Restriction (x) Fireplace/Firebox
No Restriction 13"
1/2" to 1Z\x" 16"
Greater than 1Z\x" to 3" 16"
Greater than 3" *
*Any barrier greater than 3" placed in front of the gas log
set is not recommended by the manufacturer.
NOTE: Non combustible material such as refractory brick
may be used to line the oor of the replace in order to
raise the height of the gas log set in relation to a restrictive
barrier. If the unit is raised, the minimum height dimension
listed in the homeowner’s manual must not be exceeded.
NOTE: If the log set is equipped with a remote receiver, a
restrictive barrier may reduce the battery life by increasing
the ambient temperature inside the replace. Placement
of the receiver outside of the replace will extend the
battery life.
Barriers such as the bottom of a glass door
frame placed in front of a gas log set can
change the air ow characteristics of the
replace which in turn can cause the unit
to overheat and malfunction.
WARNING
LO
HI
OFF
ON
I
G
N
X
FP2531
fireplace w barrier
Refer to
Table 1
Glass door frames
with adjustable
louvers should
have the louvers
fully open while the
unit is in operation
The log set should
be placed against or
as near as possible
to the rear wall of the
replace/rebox.
Height of restrictive barrier
caused by glass door frames,
recessed replaces, etc. from
the base or bottom surface of
the unit.
FP2531
Figure 2 -
Reference Drawing of a Natural Flame Log
Set in an Enclosure
7
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
ADEQUATE COMBUSTION VENTILATION
AIR
This heater shall not be installed in a conned space or
unusually tight construction unless provisions are provided
for adequate combustion and ventilation air.
The National Fuel Gas Code, (ANSI Z223.1/NFPA54),
denes a conned space as a space whose volume is less
than 50 cubic feet per 1,000 BTU per hour (4.8m
3
per kw)
of the aggregate input rating of all appliances installed in
that space, and an unconned space as a space whose
volume is not less than 50 cubic feet per 1,000 BTU per
hour (4.8 m
3
per kw) of the aggregate input rating of all
appliances installed in that space. Rooms communicating
directly with the space in which the appliances are installed,
through openings not furnished with doors, are considered
a part of a conned space.
Unusually tight construction is dened as construction
where:
a. Walls and ceilings exposed to the outside atmosphere
have a continuous water vapor retarder with a rating of
1 perm (6 x 10
11
kg per pa/sec-m
2
) or less with openings
gasketed or sealed, and
b. Weather stripping has been added to windows and
doors, and
c. Caulking or sealants are applied to areas such as joints
around window and door frames, between sole plates
and oors, between wall-ceiling joints, between wall
panels, at penetrations for plumbing, electrical and gas
lines and other openings.
The following formula can be used to determine the maxi-
mum heater rating per the denition of unconned space:
BTU/Hr = (L1 + L2) Ft x (W) Ft x (H) Ft
50
Consider two connecting rooms with an open area be-
tween, with the following dimensions:
L1 = 15
1
/2 Ft., L2 = 12 Ft., W = 12 Ft., H = 8 Ft.
BTU/Hr = (15
1
/2 + 12) x (12) x (8)
50
If there were a door between the two rooms the calculation
would be based only on the room with the heater.
BTU/Hr = (15
1
/2) x (12) x (8)
50
W
H
Counter
Fireplace
Figure 3
If the area in which the heater may be
operated does not meet the required volume
for indoor combustion air, combustion and
ventilation air shall be provided by one
of the methods described in the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, the
International Fuel Gas Code or applicable
local codes.
WARNING
8
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
INSTALLATION
Sidewall and ceiling clearances: The sides of the re-
place opening must be at least 16" from any combustible
wall. The ceiling must be at least 42" from the top of the
replace opening.
16"
42"
FP1996
wall ceiling clearances
Figure 4 -
Sidewall and Ceiling Clearances
FP1996
Heat resistant material (minimum requirements) with
no wooden mantel or other combustible projection:
To install the gas logs into a replace with no wooden
mantel, shelf or other combustible projection above the
replace opening, measure the heat resistant material
height, per Figure 5, then see TABLE A.
Heat resistant materials such as slate and marble must be
at least 1/2" thick. Sheet metal should not be installed
onto combustible material.
IMPORTANT: If you cannot meet these minimum clearanc-
es you must operate the heater with chimney ue damper
open. See Installing Vented Appliances found on page 10.
The dimensions shown in Figures 4
through 10 and defined in the fireplace
manufacturer's instructions are minimum
clearances to maintain when installing
this heater. Left and right clearances are
determined when facing the front of the
heater.
When heater is installed into a ventless
rebox, minimum clearances, as specied
by the ventless rebox manufacturer, must
be met.
Follow these instructions carefully to
ensure safe installation. Failure to follow
instructions exactly can create a fire
hazard.
WARNING
FP2533
mantel clear no hood
Heat
Resistant
Material
Measure This
Distance
Heater in Fireplace
or Firebox
FP2533
Figure 5 -
Mantel Clearance without Hood
Heat Resistant Material EYF24/18 Requirements
Measurement for Safe Installation
12" or more Hood not required.
8" to less than 12" Extend heat resistant material
to at least 12" or install hood.
Figure 4
Less than 8" Extend heat resistant material
to 8" AND install hood. Fig. 4.
OR extend heat resistant
material to a height of at
least 12".
Table A -
Heat Resistant Material Requirements with No
Mantel or Combustible Projection
CLEARANCE and HEIGHT REQUIREMENTS
9
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
INSTALLATION
Heat resistant material (minimum requirements) with
wooden mantel or other combustible projection: To
install the heater with a wooden mantel, shelf or other
combustible projection above, first measure the heat
resistant material shown in Figure 6, then refer to Table B.
FP2532
mantel clear w hood
8" or More of Heat
Resistant Material
Hood
Heater in
Fireplace or
Firebox
FP2532
Figure 6 -
Mantel Clearance with Hood
EYF24/18 Requirements
for Safe Installation with
Heat Resistant Material Wooden Mantel, Shelf or
Measurement Other Combustible
Projection
12" or more Hood not required. Observe
proles (side elevations)
shown in Figure 6.
8" to less than 12" Install hood (CABR/CABL)
and refer to Figure 6; OR
extend heat resistant material
to at least 12" and observe
proles.
Less than 8" Extend heat resistant material
to at least 8", install hood and
observe proles shown in
Figure 7 OR extend heat
resistant material to 12" and
observe proles shown in
Figure 7
Table B -
Heat Resistant Material Heights and Mantel Location
FP2534
Min. mantel w hood
10"
8"
6"
2¹⁄₂"
8" 14¹⁄₂" 18⁵⁄₈" 22¹⁄₂" 26"
12"
Heat
Resistant
Material
Hood
Heater in Fireplace
or Firebox
FP2534
Figure 7 -
Minimum Mantel Clearance with Hood
Example: A mantel may project from the wall a maximum
of 2Z\x" at a minimum of 8" above the opening and a max-
imum of 6" at a minimum of 14Z\x" above the opening.
12”
Min.
28”
10” or Less
FP2535
min mantel no hood
Heat
Resistant
Material
Heater in Fireplace
or Firebox
FP2535
Figure 8 -
Minimum Mantel Clearance with No Hood
Example: The bottom of the mantel may project from the
wall a maximum of 10" at a minimum of 28" above the
opening.
10
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
INSTALLATION
The gas log heater must be installed at least 5" above any
combustible ooring material, such as carpeting or tile,
which is closer than 14" to the base of the replace. The
minimum distance must be maintained from the top surface
of carpeting, tile, etc. Figure 9
OR,
The gas log heater may be installed nearer to the oor if a
minimum of 14" of noncombustible material such as slate
or marble is installed between the base of the replace and
the combustible ooring. Figure 10
5” Min.
FP2536
floor clear comb
Heater in Fireplace
or rebox
Combustible
Material
Figure 9 -
Minimum Clearance Above Combustible Flooring
FP2536
14” Min.
FP2537
floor clear noncomb
Heater in Fireplace or
Firebox
This Distance May
Now be Less than 5"
Combustible
Material
FP2537
Figure 10-
Minimum Clearance above Combustible Flooring with
Noncombustible Material Installed at Base of Fireplace
FLOOR CLEARANCE
FIREPLACE PREPARATION
BEFORE FULLY INSTALLING THE UNIT:
•
Turn OFF the gas supply to the replace or rebox.
• Seal any fresh air vents and/or ash clean-out doors
located on the oor or wall of the replace. If left un-
sealed, drafting may cause pilot outage or sooting. Use
a heat resistant sealant. Do not seal the chimney ue
damper.
INSTALLING VENTED APPLIANCES
Manual and millivolt controlled gas logs may be installed as
a vented decorative log set in compliance with ANSI Z21.60
and National Fuel Gas Code, Section 6.6 Since, the gas
logs are operated with the damper open, non-combustible
material and minimum mantel requirements do not apply.
NOTE: The use of a thermostat is prohibited in vented log
applications.
BEFORE INSTALLING THE APPLIANCE:
• Turn o gas supply to replace or rebox.
• Have the replace oor and chimney professionally
cleaned to remove ashes, soot, creosote or other ob-
structions. Have this cleaning performed annually after
installation.
WARNING
Before installing in a solid fuel burning
replace, The chimney ue and rebox must
be cleaned of soot, creosote, ashes and
loose paint by a qualied chimney cleaner.
WARNING
This appliance is for installation only in a solid
fuel burning replace (masonry replace or
manufactured fireplace) with a working
flue and constructed of noncombustible
material.
Exception: DO NOT install this appliance
in a factory-built fireplace that includes
instructions stating that it has not been
tested or should not be used with unvented
gas logs.
►
11
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
INSTALLATION
•
Seal any fresh air vents or ash clean-out doors located
on oor or wall of replace. If not, drafting may cause
pilot outage or sooting. Use a heat-resistant sealant.
Do not seal chimney ue damper.
Install and operate the appliance as directed in this
manual.
DAMPER STOP INSTALLATION:
A damper stop must be provided with the unit. Contact your
dealer to obtain one. The damper stop must be installed as
shown in Figure 10 to prevent full closure of the replace
damper blade and provide a minimum 29 square inch ue
opening.
FP2538
damper stop
Damper
Stop
Damper
FP2538
Figure 11 -
Damper Stop Installation
WARNING
The replace and gas logs function as a
system. If the replace is spilling into the
room (check with a match or a smoke stick),
reposition the damper clamp until a positive
draft is obtained by opening the damper. If
negative pressure in home prevents having
a positive draft, contact your dealer for
assistance.
PLACE and SECURE APPLIANCE
ASSEMBLY PROCEDURE:
Figure 12
1. Center the gas log unit in the replace or rebox.
2. Install Grate: Insert longest middle grate bar in one
of the two square holes in control panel. Be sure grate
is centered. Sit horizontal bar inside two (2) hooks on
front of control panel. Make certain front feet of grate
are located inside front edge of replace or rebox.
3. Anchor holes are located on the ange of the unit. After
centering the burner correctly, mark the hole positions
on the replace/rebox oor. Drill two (2) 5/32" diameter
holes approximately 1Z\x" deep.
4. Anchor the unit to the replace/rebox oor using the
screws provided.
WARNING
You must secure the gas log heater to the
replace oor. If not, the entire unit may move
when you adjust the controls. Movement of
unit may cause shifting of the gas logs which
leads to sooting and improper burning.
Special care is required if you are installing
the unit into a sunken replace. You must
raise the replace oor to allow access to
gas log controls. This will insure adequate
air ow and guard against sooting. Raise
the replace oor using noncombustible
materials, as described in Placement in
a Fireplace with Restrictive Barrier on
Page 6.
HI
OFF
FP2539
install grate
Screws
Hole for
Grate Bar
Horizontal
Grate Bar
Hook for
Grate
Hook for Grate
Middle Grate Bar
FP2539
Figure 12 -
Install Grate and Secure Heater to
Floor of Fireplace/Firebox
12
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
MILLIVOLT CONTROL
Figure 15
The valve regulator con-
trols the burner pressure
which should be checked
at the pressure test
point.
Turn captured screw
counter clockwise
two or three turns
and then place
tubing to pressure
gauge over test point
(Use test point “OUT”
closest to control
knob). After taking
pressure reading,
be sure and turn
captured screw clockwise rmly to re-seal. Do not over
torque. Check for gas leaks.
NOTICE: A qualied gas appliance installer must connect
the heater to the gas supply. Consult all local codes.
IMPORTANT: Hold heater valve rmly with a wrench to
prevent movement when connecting to inlet pipe.
Always use an external regulator for all propane/LPG
heaters and high pressure one to two-pound systems
only, to reduce the supply tank pressure to a maximum of
13" w.c. This is in addition to the internal regulator in the
heater valve.
GAS LINE CONNECTION
WARNING
Use new black iron or steel pipe. Internally
tinned copper or copper tubing can be
used per National Fuel Code, section 2.6.3,
providing gas meets hydrogen sulde limits,
and where permitted by local codes. Gas
piping system must be sized to provide
minimum inlet pressure (Listed on Data
Plate) at the maximum ow rate (BTU/Hr).
Undue pressure loss will occur if the pipe
is too small.
A manual shuto valve must be installed
upstream of the appliance. Union tee
and plugged 1/8" NPT pressure tapping
point should be installed upstream of the
appliance. Figure 13
FP2371
gas connect
Stainless
Flexible
Tube
Pipe
Possible Locations
for Pressure
Tapping Point
Gas
Supply
Inlet
To
Heater
Valve
Pipe
Coupling
Manual Shuto
Valve
FP2371
Figure 13 -
Gas Connection
Connecting directly to an unregulated
propane/LPG tank can cause an explo-
sion.
WARNING
CHECK GAS TYPE: The gas supply must
be the same as stated on the heater’s rat-
ing plate. If the gas supply is dierent, DO
NOT INSTALL THE HEATER. Contact your
dealer for the correct model.
WARNING
The heater gas inlet connection is a 3/8" NPT at the valve.
All units have the inlet connection on the right side, when
you face the unit. To connect from the opposite side, route
the pipe under the rear portion of the unit.
When tightening up the joint to the valve, hold the valve
securely to prevent movement.
MANUAL CONTROL
Figure 14
The pressure regulator is preset and locked to dis-
courage tampering. If the pressure is not as specied,
replace the regulator with the correct part from the parts
list in this manual.
Remove 1/8" NPT plug, located on side of regulator body.
Install fitting and tubing to
pressure gauge. After taking
pressure reading, reinstall
test plug. Check for gas
leaks.
FP2499
manual valve
NPT Test Plug
FP2499
Figure 14 -
Pressure Test Point Location for
Manual Control
Figure 15 - Pressure Test Point Location
Millivolt Control
FP2372
millivolt valve
Test Port "OUT"
FP2372
13
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
ELECTRICAL WIRING - MILLIVOLT
Label all wires prior to disconnection when
servicing controls.
Wiring errors can cause improper and
dangerous operation.
Verify proper operation after servicing.
WARNING
FP2112
wiring diagram
12/08
Wall
Switch
On/O Switch
On/O
Switch
Millivolt
Valve
ODS Pilot
TH = 3
TP = 1
TP/TH = 2
ODS Pilot
Spade Terminal
Switch
Optional Wall
Switch or Remote
Receiver
FP2112
Figure 16 -
Wiring Diagram
CONNECTING OPTIONAL WALL SWITCH
OR THERMOSTAT (VENT FREE APPLICA-
TIONS ONLY)
1. Use 18 AWG, two-wire cable, 20 feet maximum length.
2. At one end of the cable, connect both wires to the wall
switch or thermostat. At the other end, connect one wire
to TP/TH and one wire to TH. The color of the wires
does not matter. Or you can hook the wall switch or
thermostat to wires on the unit.
►
14
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
CONNECTING OPTIONAL REMOTE RE-
CEIVER
FOLLOW INSTRUCTIONS SUPPLIED WITH
THE REMOTE
1. Connect the wires to the two .25" male connectors
located on the left side of the valve when facing the
unit. Page 13, Figure 16. Do not let wire touch grate or
burner.
2. Stick velcro pads with self-adhesive backing to the right
side of remote receiver and to the left side of the unit.
Figure 17
3. Attach remote receiver with velcro pads. Control switch
must face forward.
NOTE: Heat reduces battery life. You can protect the
receiver and extend battery life by mounting the receiver
in a wall or other location outside the replace.
ELECTRICAL WIRING - MILLIVOLT
CHECKING SYSTEM OPERATION
The millivolt system and individual components may be
checked with a millivolt meter having a 1-1000 mV range.
Conduct each check shown in chart by connecting meter
test leads to terminals as indicated.
A. Complete Millivolt System Check
(“A” Reading - Thermostat contacts CLOSED - Control
knob “ON” - Main burner should turn ON)
1. If reading is more than 175 millivolts and the au-
tomatic valve still does not come on, replace the
control.
2. If the closed circuit reading (“A” reading) is less
than 175 millivolts, determine cause for low read-
ing, proceed to Section B.
B. Thermopile Output Reading Check
(“B” Reading - thermostat contacts OPEN - Main burn-
er OFF
1. Check gas pressure to the unit. If gas pressure is
within minimum and maximum on data plate, then
check pilot voltage, 500 millivolts minimum. If the
minimum millivolt reading is not obtainable, replace
pilot.
Connect Switch or Meter
Check Meter Leads Thermostat Reading
Test To Test To Terminals Contacts Should Be
A Complete 2 & 3 Closed Minimum 175
System
B Thermopile 1 & 2 Open Minimum 500
Output
LO
HI
OFF
SKYTECH
OFF
ON
REMOTE
FP2540
install remote receiver
Remote
Receiver
Velcro
Pads
FP2540
Figure 17 -
Install Remote Receiver
15
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
LOG PLACEMENT
The positioning of the logs is critical to
the safe and clean operation of this heater.
Sooting and other problems may result if the
logs are not properly and rmly positioned
in the appliance. Never add additional logs
or embellishments such as pine cones,
vermiculite or rock wool to the heater. Only
use the logs supplied with the unit.
Failure to position the parts in accordance
with diagrams below or to use only
parts specifically approved for this
heater may result in property damage or
personal injury.
WARNING
Before you begin — Do not handle the log unit with your
bare hands. Always wear gloves to prevent skin irri-
tation from ceramic bers. After handling the log unit,
wash your hands gently with soap and water to remove
any traces of bers.
INSTALL EYF24-F LOG UNIT ON BURNER
Figure 18
1. Install Main Log (#1) on middle and rear supports of
base. Tabs should t inside log center opening. Check
log position and stability.
2. Install Front Log (#2) in front of burner and behind
grate.
3. Rest rear end Top Left Log (#3) in the indention on the
main log. Line up hole in bottom of Top Left Log (#3)
with slot on Front Log.
4. Position rear end of Top Right Log (#4) on indention of
main log. Rest front end of Top Right Log (#4) on front
lot.
LG706
EYF24-F logs
Top Left Log
#3
Top Right
Log #4
Main Log
#1
Front Log
#2
Tabs
Grate Bars
LG706
Figure 18 -
EYF24-F Log Placement
PLACE THE DECORATIVE ROCK
WARNING
DO NOT sprinkle volcanic rock on the logs
or around the pilot or the main burner. This
may cause sooting. Only place volcanic rock
on the oor of the replace.
During initial operation of the new heater,
burning logs will give o a paper burning
smell and orange ames will be present.
Simply open the windows for a few hours
to vent the odor.
16
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
LOG PLACEMENT
PLACE EYF18-R LOGS
1. Place Rear Log (#1) on rear support. Figure 19
2. Place Middle Log (#2) on middle support. Figure 20
3. Place Front Log (#3) in between burner and grate.
Figure 21
4. Rest Top Log (#4) in front and middle log cutouts. Figure
22
NOTE: Logs #1, #2 and #3 have ridges on the bottom which
secure the logs to burner frame. After installing each log,
check to be sure it is stable.
LG707
EYF18 rear log
Rear Log #1
LG707
Figure 19 -
Place Rear Log
LG708
EYF18 Mid log
Middle Log #2
LG708
Figure 20 -
Place Middle Log
LG709
EYF18 front log
Front Log #3
Figure 21 -
Place Front Log
LG709
LG710
EYF18 top log
Top Log #4
LG710
Figure 22 -
Place Top Log
LG711
EYF18 logs
LG711
Figure 23 -
EYF18-R Logs Set Complete
17
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
LOG PLACEMENT
PLACE EYF24-R and EYF30-R LOG SETS
1. Place Rear Log (#1) on rear support. Figure 24
2. Place Middle Log (#2) on middle support. Figure 25
3. Place Front Log (#3) in between burner and grate.
Figure 26
4. Place Top Right Log (#4) in bottom log cutouts.
Figure 27
5. Rest Top Left Log (#5) in front and middle log cutouts.
Figure 28
NOTE: Logs #1, #2 and #3 have ridges on the bottom which
secure the logs to burner frame. After installing each log,
check to be sure it is stable.
LG712
EYF24 rear log
Rear Log #1
LG712
Figure 24 -
Place Rear Log
LG713
EYF24 Middle log
MIddle Log #2
LG713
Figure 25 -
Place Middle Log
LG714
EYF24 front log
Front Log #3
LG714
Figure 26 -
Place Front Log
LG715
EYF24 top left right logs
Top Left Log #5
Top Right Log
#4
LG715
Figure 27 -
Place Top Left and Right Logs
LG716
EYF24 logset
Figure 28 -
EYF24-R Logs Complete
NOTE: Installation instructions are the same for 24" and
30" log sets. Illustrations shown are for the 24" models.
Some variations may exist between the images and the
set included with this manual.
18
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
FLAME APPEARANCE
FP2501
manual pilot flame
FP2273
pilot bad flame
FP2272
pilot correct flame
Flames from the pilot, front and rear burner should be
visually checked as soon as the heater is installed.
In addition, periodically check the ames visually during
operation.
Figure 29 -
Millivolt Control Pilot Flame Appearance
Thermocouple
for Natural Gas
Thermocouple
for LP
FP2272
Thermocouple
for Natural Gas
Thermocouple
for LP
FP2273
MILLIVOLT CONTROL
Correct Pilot Flame Appearance Incorrect Pilot Flame Appearance
MANUAL & HI/LO CONTROL
Thermocouple
for Natural Gas
Thermocouple
for LP
Thermocouple
for Natural Gas
Thermocouple
for LP
FP2502
Correct Pilot Flame Appearance
Incorrect Pilot Flame Appearance
Figure 30 -
Manual & Hi/Lo Control Pilot Flame Appearance
CHECK THE PILOT FLAME
The pilot ame must always be present when the
heater is in operation. It should just touch the top of the
thermocouple tip for natural. Refer to Figures 29 & 30 for
correct pilot ame.
If the pilot ame does not touch the thermocouple, then
the main burner cannot function reliably. Refer to Figures
29 & 30 for incorrect shape of pilot ame.
19
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
FLAME APPEARANCE
In normal operation at full rate after 15 minutes, the
following ame appearances should be observed:
The left and right ames should be yellow and extend 1"
to 2" above the log top surfaces. The yellow ames should
not contact the logs.
OPERATING INSTRUCTIONS
Avoid any drafts that alter burner ame patterns. Do
not allow fans to blow directly into the replace. Do not
place a blower inside the burn area of the rebox. Ceiling
fans may create drafts that alter ame patterns. Sooting
and improper burning will result.
During manufacturing, fabricating and shipping, various
components of this appliance are treated with certain oils,
lms or bonding agents. These chemicals are not harm-
ful, but may produce annoying smoke and smells as they
are burned o during the initial operation of the appliance,
possibly causing headaches or eye or lung irritation. This
is a normal and temporary occurrence.
LO
HI
OFF
ON
I
G
N
LG717
EYF flame height
Figure 31 -
Correct Burner Flame Appearance
LG717
The initial break-in operation should last two to three hours
with the burner at the highest setting. Provide maximum
ventilation by opening windows or doors to allow odors to
dissipate. Any odors remaining after this initial break-in will
be slight and will disappear with continued use.
This appliance must not be used with glass doors in the
closed position. This can lead to pilot outages and severe
sooting outside the replace.
20
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
FOR YOUR SAFETY, READ BEFORE LIGHTING
A. This appliance is equipped with an ignition device which automatically lights the pilot. Do not try
to light the pilot by hand.
B. BEFORE OPERATING 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 settle on the oor.
WHAT TO DO IF YOU SMELL GAS:
• Do not attempt 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 instruc-
tions.
• If you cannot reach your gas supplier, call the re department.
C. Use only your hand to push in, or turn the gas control knob. Never use tools. If the knob will not
push in or turn by hand, don't try to repair it. Call a qualied service technician. Force or attempted
repair may result in a re or explosion.
D. Do not use this appliance if any part of it has been under water. Immediately call a qualied ser-
vice technician to inspect the appliance and to replace any part of the control system and any gas
control that has been under water.
WARNING
If you do not follow these instruction
exactly, a fire or explosion may result
causing property damage, personal injury
or loss of life.
LO
HI
OFF
FP2541
burner controls
Figure 32 -
Burner Controls
Piezo Ignitor
Switch
Control Knob
FP2541
OPERATING INSTRUCTIONS
21
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
OPERATING INSTRUCTIONS
MANUAL CONTROL LIGHTING INSTRUCTIONS
1. STOP! Read the safety information.
2. Make sure the manual shuto valve is fully open.
3. This heater is equipped with an ignition device (piezo) which automatically
lights the pilot.
4. Refer to Page 22, Figure 37 for the location of the piezo ignitor and control
knob. Push in gas control knob slightly and turn control knob clockwise
to the OFF position.
NOTE: Knob cannot be turned to OFF unless knob is pushed in slightly. Do
not force.
5. Wait 5 minutes to clear out any gas. Then smell for gas, including near the
oor. If you smell gas STOP! Follow the instructions under “What to Do if You
Smell Gas”, Page 19. If you do not smell gas, go to the next step.
6. From OFF position, push in gas control knob slightly and turn counterclock-
wise
to the IGN position. Figure 33. Push in and hold control knob for 5
seconds.
NOTE: If you are running the heater for the rst time, it will be necessary to
press in the control knob for 30 seconds to allow air to bleed out of the gas
piping.
7. With the control knob pushed in, push and release the piezo ignitor button to
light the ODS pilot. The pilot is located on the left side of the heater, behind
the middle log and in front of the back log. If piezo ignitor does not light the
pilot, refer to “Match Lighting Instructions”, Page 23.
8. Hold the control knob in for an additional 10 seconds to prevent the ODS pilot
from shutting o the gas while the thermocouple is warming up.
9. Release the control knob.
• If the knob does not pop out when released, stop and immediately call your
service technician or gas supplier.
• If the ODS pilot will not stay lit after several tries, push and turn the gas
control knob clockwise to OFF and wait 15 seconds. Repeat steps 6
through 9.
10. Push in control knob and turn counterclockwise to the HIGH setting. At
this location the control knob will pop out when positioned correctly. The knob
can now be positioned at any position between HIGH and LOW. Figures 34
and 35
Rotate
Push
Figure 33 -
IGN Position
Figure 34 -
HIGH Position
Rotate
Push
Figure 35 -
LOW Position
Rotate
WARNING
Wait 30 seconds before readjusting the
heater when the control knob has been
turned down to a lower setting.
1. Turn control knob clockwise
to OFF position to completely shut o the heater.
2. If applicable: Turn o all electric power to the heater.
TO TURN OFF GAS TO HEATER
22
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
OPERATING INSTRUCTIONS
MILLIVOLT CONTROL LIGHTING INSTRUCTIONS
1. STOP! Read the safety information label.
2. Make sure the manual shuto valve is fully open.
3. This gas log set is equipped with an ignition device (piezo) which automatically lights the pilot. If piezo
ignitor does not light the pilot, refer to instructions for Match Lighting Instructions, Page 23.
4. Turn gas control knob clockwise to the OFF position, set thermostat to lowest setting and turn ON/OFF
switch to OFF position.
5. Wait (5) minutes to clear out any gas. Then smell for gas, including near the oor. If you smell gas,
STOP! Follow What to Do if You Smell Gas, Page 20. If you don't smell gas, go to next step.
6. From OFF position, turn the gas control knob counterclockwise
to IGN position. Push in control
knob for 5 seconds.
7. With the control knob pushed in, push in and release the piezo ignitor button to light the pilot.
8. Continue pushing the control knob in for a further 60 seconds to prevent the ame detector from shut-
ting o the gas while the probe is warming up. Release the control knob.
9. Turn gas control knob counterclockwise
to the ON position.
10. After the pilot has been lit for one minute, the burners can be turned on. Turn the ON/OFF switch to
ON position or adjust thermostat to desired setting.
11. If the gas logs will not operate, follow the instructions To Turn O Gas To Heater below and call your
service technician or gas supplier.
TO TURN OFF GAS TO HEATER
1. Turn control knob clockwise to OFF position to completely shut o the heater.
2. If applicable: Turn ON/OFF switch to OFF position and/or set thermostat (if present) to lowest setting.
3. If applicable: Turn o all electric power to the heater.
Figure 36 -
Pilot
FP2275
FP2542
millivolt controls
Piezo
ON/OFF Switch
Hi/Lo Control
On/O/Pilot Control
FP2542
Figure 37 -
Millivolt Controls
23
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
OPERATING INSTRUCTIONS and MAINTENANCE
MATCH LIGHTING INSTRUCTIONS
1. Remove any items necessary for easy access to the pilot (for example: logs, screens, etc.).
2. Follow appropriate lighting instructions found previously. Instead of pushing and releasing the piezo
button, light a match and hold the ame to the end of the pilot and ignite the pilot.
3. After control knob has been released and pilot stays lit, reinstall any items that were removed for pilot
access.
4. Call a qualied service technician for repair or replacement of the piezo ignitor.
WARNING
Turn o heater and allow to cool before
cleaning.
Disconnect electrical power (optional
blower) before cleaning or servicing.
MAINTENANCE
Remove logs carefully by holding gently at each end.
Gloves are recommended to prevent skin irritation from
ceramic bers. If skin becomes irritated, wash gently with
soap and water. Refer to Log Placement, Pages 16-18 for
correct log placement.
PERIODIC CLEANING - Refer to the parts dia-
gram for location of items discussed below.
• Do not use cleaning uid to clean logs or any part of
heater.
• Brush logs with soft bristle brush or vacuum with
brush attachment.
• Vacuum loose particles and dust from the front and
rear burner, control and piezo covers and grate weld-
ment.
• Inspect and clean burner air intake holes. Remove
lint or particles with vacuum, brush, or pipe cleaners.
Failure to keep air intake holes clean will result in
sooting and poor combustion.
• External case should be dusted and wiped with a
wet soapy cloth.
ANNUAL CLEANING/INSPECTION - Refer to
the parts diagram for location of items discussed
below.
• Inspect and clean burner air intake holes. Remove
lint or particles with vacuum, brush or pipe cleaners.
Failure to keep air intake holes clean will result in
sooting and poor combustion.
• Inspect and clean all burner ports.
• Inspect ODS pilot for operation and accumulation of
lint at air intake holes.
• Verify ame pattern and log placement for proper
operation.
• Verify smooth and responsive ignition of main burner
and rear burner.
24
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
TROUBLESHOOTING
WARNING
Turn o appliance and allow to cool before
cleaning.
Only a qualified service person should
service and repair the heater.
NOTE: All troubleshooting items are listed in order of
operation.
Problem
When ignitor button is
pressed, there is not spark
at ODS/pilot.
Appliance produces un-
wanted odors.
Appliance shuts o during
use.
Gas odor even when
control knob is in OFF
position.
When ignitor button is
pressed, there is spark at
ODS/pilot, but no ignition.
Possible Cause
1. Ignitor electrode positioned wrong.
2. Ignitor electrode is broken.
3. Ignitor electrode not connected to
ignitor cable.
4. Ignitor cable pinched or wet. Keep
ignitor cable dry.
5. Broken ignitor cable.
6. Bad piezo ignitor.
1. Appliance burning vapors from
paint, hair spray, glues, etc.
2. Gas leak.
3. Initial burn o.
1. Not enough fresh air is available for
ODS/pilot to operate.
2. Low line pressure.
3. ODS/pilot is partially clogged.
4. Defective thermopile.
5. Restrictions in incoming air ow.
1. Gas leak.
2. Control valve defective.
1. Gas supply turned o or manual
shuto valve closed.
2. Control knob not in PILOT position.
3. Control knob not pressed in while in
PILOT position.
4. Air in gas lines when installed.
5. ODS/pilot is clogged.
6. Gas regulator setting is not correct.
Solution
1. Replace ignitor.
2. Replace ignitor.
3. Reconnect ignitor cable.
4. Free ignitor cable if pinched by any
metal or tubing.
5. Replace ignitor cable.
6. Replace piezo ignitor.
1. Ventilate room. Stop using odor causing
products while heater is running.
2. Locate and correct leaks.
3. Ventilate room and turn unit on high until
odor is gone. Odor should be gone after
6 hours of continuous use.
1. open window and/or door for ventilation.
2. Contact local gas company.
3. Clean ODS/pilot.
4. Check wire connections. Check output
should be 500 mV across TH/TP and TP
terminals with ON/OFF switches o.
5. Check for bottom riser on glass door,
sunken replace, excessive lava rock/
cinders densely packed against grate.
1. Locate and correct all leaks.
2. Replace control valve.
1. Turn on gas supply or open manual
shuto valve.
2. Turn control knob to PILOT position.
3. Press in control knob while in PILOT
position.
4. Continue holding down control knob.
Repeat igniting operation until air is
removed.
5. Replace ODS/pilot assembly or get it
services.
6. Check incoming pressure. Replace gas
regulator.
25
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
TROUBLESHOOTING
Problem
Possible Cause
Solution
WARNING
If the gas quality is bad, your pilot may not
stay lit, the burners may produce soot and
the heater may backre when lit. If the gas
quality or pressure is low, contact your local
gas supplier immediately.
ODS/pilot lights, but ame
goes out when control
knob is released.
Burner does not light after
ODS/pilot is lit.
Burner backres during
combustion.
Slight smoke or odor dur-
ing initial operation.
Logs appear to smoke
after initial operation.
Heater produces a whis-
tling noise when burner is
lit.
No gas to pilot.
1. Control knob not fully pressed in.
2. Control knob not pressed in long
enough.
3. Manual shuto valve not fully open.
4. Thermocouple connection loose at
control valve.
5. Pilot ame not touching thermo-
couple, which allows thermocouple
to cool, causing pilot ame to go out.
This problem could be caused by
either low gas pressure, or a dirty or
partially clogged ODS/pilot.
6. Thermocouple damaged.
7. Control valve damaged.
1. Burner orice is clogged.
2. Burner orice diameter is too small.
3. Inlet gas pressure is too low.
1. Manifold Pressure is too low.
2. Burner orice is clogged.
1. Burner orice is clogged or dam-
aged.
2. Burner is damaged.
3. Gas regulator is defective.
1. Vapors from paint or curing process
of logs.
1. Turning control knob to HIGH posi-
tion when burner is cold.
2. Air in gas line.
3. Dirty or partially clogged burner
orices.
1. LP regulator shut down due to inlet
pressure too high.
1. Press in control knob fully.
2. After ODS/pilot lights, keep control knob
pressed in for 30 seconds.
3. Fully open manual shuto valve.
4. Hand tighten thermocouple connection
until snug, then tighten 1/4 turn more.
5. Contact local gas company.
6. Replace thermocouple.
7. Replace control valve.
1. Clean burner or replace burner orice.
2. Replace burner orice.
3. Contact qualied service person.
1. Contact local gas company.
2. Clean burner or replace burner orice.
1. Clean burner or replace burner orice.
2. Replace burner.
3. Replace gas regulator.
1. Problem will stop after a few hours
of operation. Run the heater with the
damper open if you have one, or open a
window for the rst few hours.
2. Log heater is intended to be smoke-
less. Turn OFF heater and call qualied
service person.
1. Turn control knob to LOW position and
let warm up for a minute.
2. Operate burner until air is removed from
line. Have gas line checked by local gas
company.
3. Clean burner or replace burner orice.
1. Verify LP tank regulator is installed and
set at 11” to 13” w.c.
2. Replace regulator on heater.
26
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
SERVICE PARTS
Service Parts
Beginning Manufacturing Date: NA
Ending Manufacturing Date: Active
EYF18
Part number list on following page.
12/19
18” Hearth Kit
EYF18NM (Natural Gas Manual Control)
EYF18NV (Natural Gas Millivolt Control)
EYF18PM (Propane Manual Control)
EYF18PV (Propane Millivolt Control)
1
2
4
5
6
7
8
9
10
11
12
3
27
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
SERVICE PARTS
Service Parts
Beginning Manufacturing Date: NA
Ending Manufacturing Date: Active
EYF18
IMPORTANT: THIS IS DATED INFORMATION. Parts must be ordered from a dealer or
distributor.
Hearth and Home Technologies does not sell directly to consumers. Provide
model number and serial number when requesting service parts from your dealer or distributor.
Stocked
at Depot
ITEM DESCRIPTION COMMENTS PART NUMBER
1 Burner
NG SRV65D1053
Propane SRV65D1054
2
ODS Pilot Assembly (Manual Control)
NG SRV26D2529 Y
Propane SRV14D0476 Y
ODS Pilot Assembly (Millivolt Control)
NG SRV14D0473 Y
Propane SRV14D0477 Y
Pilot Tube 49D0050K Y
3 Grate 65D1020K
4 Piezo Ignitor SRV14D0503 Y
Piezo Wire SRV00K0632 Y
5 On/O Switch Millivolt Control SRV32D0232 Y
6 Knob Control Manual Control SRV18D0603
7 Knob Extension, On/O Millivolt Control SRV37D0010
8 Knob Extension, Hi/Lo Millivolt Control SRV37D0011
9 Regulator (Manual Control)
NG SRV24D0305 Y
Propane SRV24D0306 Y
10 Control Valve (Manual Control)
NG SRV30D0201 Y
Propane SRV30D0202
11 Control Valve (Millivolt Control)
NG SRV14D0467 Y
Propane SRV14D0468 Y
12 Injector
NG SRV58D0051
Propane SRV20H3144
Regulator to Valve Tube Manual Control SRV65D1004
Y
Valve to Burner Tube
No longer available
65D1005K
Millivolt Control 65D1007K
Pilot Regulator NG Only SRV14D0469
Y
28
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
Service Parts
Beginning Manufacturing Date: NA
Ending Manufacturing Date: Active
EYF18
IMPORTANT: THIS IS DATED INFORMATION. Parts must be ordered from a dealer or
distributor.
Hearth and Home Technologies does not sell directly to consumers. Provide
model number and serial number when requesting service parts from your dealer or distributor.
Stocked
at Depot
ITEM DESCRIPTION COMMENTS PART NUMBER
13
Log Assembly
(Required to complete burner assembly, Sold seperately)
18” Mountain Oak
EYF18-R
13.1 Front Log 65D1038K
13.2 Rear Log 65D1036K
13.3 Middle Log 65D1037K
13.4 Top Log 65D1039K
13.1
13.2
13.3
13.4
SERVICE PARTS
29
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
Service Parts
Beginning Manufacturing Date: NA
Ending Manufacturing Date: Active
EYF24
Part number list on following page.
12/19
24” Hearth Kit
EYF24NM (Natural Gas Manual Control)
EYF24NV (Natural Gas Millivolt Control)
EYF24PM (Propane Manual Control)
EYF24PV (Propane Millivolt Control)
1
2
4
5
6
7
8
9
10
11
12
3
SERVICE PARTS
30
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
Service Parts
Beginning Manufacturing Date: NA
Ending Manufacturing Date: Active
EYF24
IMPORTANT: THIS IS DATED INFORMATION. Parts must be ordered from a dealer or
distributor.
Hearth and Home Technologies does not sell directly to consumers. Provide
model number and serial number when requesting service parts from your dealer or distributor.
Stocked
at Depot
ITEM DESCRIPTION COMMENTS PART NUMBER
1 Burner
NG SRV65D1055 Y
Propane SRV65D1056
2
ODS Pilot Assembly (Manual Control)
NG SRV26D2529 Y
Propane SRV14D0476 Y
ODS Pilot Assembly (Millivolt Control)
NG SRV14D0473 Y
Propane SRV14D0477 Y
Pilot Tube 49D0050K Y
3 Grate 65D1025K
4 Piezo Ignitor SRV14D0503 Y
Piezo Wire SRV00K0632 Y
5 On/O Switch Millivolt Control SRV32D0232 Y
6 Knob Control Manual Control SRV18D0603
7 Knob Extension, On/O Millivolt Control SRV37D0010
8 Knob Extension, Hi/Lo Millivolt Control SRV37D0011
9 Regulator (Manual Control)
NG SRV24D0305 Y
Propane SRV24D0306 Y
10 Control Valve (Manual Control)
NG SRV30D0201 Y
Propane SRV30D0202
11 Control Valve (Millivolt Control)
NG SRV14D0467 Y
Propane SRV14D0468 Y
12
Injector, Manual Control
NG SRV70D0064 Y
Propane SRV57D0612 Y
Injector, Millivolt Control
NG SRV57D0209 Y
Propane SRV57D0612 Y
Regulator to Valve Tube Manual Control SRV65D1004
Y
Valve to Burner Tube
Manual Control 65D1006K
Millivolt Control 65D1008K
Pilot Regulator NG Only SRV14D0469
Y
SERVICE PARTS
►
31
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
Service Parts
Beginning Manufacturing Date: NA
Ending Manufacturing Date: Active
EYF24
IMPORTANT: THIS IS DATED INFORMATION. Parts must be ordered from a dealer or distributor. Hearth and
Home Technologies does not sell directly to consumers. Provide model number and serial number when
requesting service parts from your dealer or distributor.
Stocked
at Depot
ITEM DESCRIPTION COMMENTS PART NUMBER
13
Log Assembly, 24” Mountain Oak Ceramic Fiber
(Required to complete burner assembly, Sold seperately)
No longer available
EYF24-F
13.1 Main Log 65D0006K
13.2 Front Log 65D1030K
13.3 Top Left Log 65D0008K
13.4 Top Right Log 65D0009K
14
Log Assembly
(Required to complete burner assembly, Sold seperately)
24” Mountian Oak
Cement Log
EYF24-R
30” Mountain Oak
EYF30-R
14.1 Front Log
24”
65D1033K
30”
65D1501K
14.2 Top Left Log
24”
65D1035K
30”
65D1035K
14.3 Top Right Log
24”
65D1034K
30”
65D1034K
14.4 Rear Log
24”
65D1031K
30”
65D1031K
14.5 Middle Log
24”
65D1032K
30”
65D1500K
14.1
14.2
14.3
14.4
14.5
13.4
13.3
13.2
13.1
SERVICE PARTS
32
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
NOTE REGARDING VENTED PRODUCTS
This product must be installed by a licensed plumber or gas tter
when installed within the Commonwealth of Massachusetts.
Any residence with a direct vent product must have a CO
detector installed in the residence.
Installation of the replace or vented gas log in the State of
Massachusetts requires the damper to be permanently removed
or welded in the fully open position.
In addition, a naturally vented gas log may not be installed in a
bedroom or bathroom in the State of Massachusetts.
Flex line installation must not exceed 36 inches and must have
a T shuto valve.
NOTE REGARDING VENT FREE PRODUCTS
This product must be installed by a licensed plumber or gas tter
when installed within the Commonwealth of Massachusetts.
In addition, vent free products may not be installed in a
bedroom or bathroom regardless of size or type in the State of
Massachusetts.
Flex line installation must not exceed 36 inches and must have
a T shuto valve.
CARBON MONOXIDE DETECTOR REQUIREMENTS
(2) Revise 10.8.3 by adding the following additional
requirements:
(a) For all side wall horizontally vented gas fueled
equipment installed in every dwelling, building or structure used
in whole or in part for residential purposes, including those
owned or operated by the Commonwealth and where the side
wall exhaust vent termination is less than seven (7) feet above
nished grade in the area of the venting, including but not
limited to decks and porches, the following requirements shall
be satised:
1. Installation of carbon monoxide detectors. At the time
of installation of the side wall horizontal vented gas fueled
equipment, the installing plumber or gas tter shall observe
that a hard wired carbon monoxide detector with an alarm and
battery back-up is installed on the oor level where the gas
equipment is to be installed. In addition, the installing plumber
or gas tter shall observe that a battery operated or hard wired
carbon monoxide detector with an alarm is installed on each
additional 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 installation 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 attic, the
hard wired carbon monoxide detector with alarm and battery
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 time of completion of installation, 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 battery operated carbon monoxide detector
with an alarm shall be installed.
Massachusetts Residents Only — Please read and follow these special requirements
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 certied.
3. Signage. A metal or plastic identication plate shall be
permanently mounted to the exterior of the building at a
minimum height of eight (8) feet above grade directly in line with
the exhaust vent terminal for the horizontally vented gas fueled
heating 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
installation unless, upon inspection, the inspector observes
carbon monoxide detectors and signage installed in accordance
with the provisions of 248 CMR 5.08(2)(a)1 through 4.
(b) Exemptions: The following equipment is exempt from 248
CMR 5.08(2)(a)1 through 4:
1. The equipment listed in Chapter 10 entitled "Equipment Not
Required To Be Vented" in the most current edition of NFPA 54
as adopted by the Board; and
2. Product Approved side wall horizontally vented gas fueled
equipment installed in a room or structure separate from the
dwelling, building or structure used in whole or in part for
residential purposes.
(c) Manufacturer requirements — Gas Equipment Venting
System Provided. When the manufacturer of Product
Approved side wall horizontally vented gas equipment provides
a venting system design or venting system components with
the equipment, the instructions provided by the manufacturer
for installation of the equipment and the venting system shall
include:
1. Detailed instructions for the installation of the venting system
design or the venting system components; and
2. A complete parts list for the venting system design or venting
system.
(d) Manufacturer requirements — Gas Equipment Venting
System Not Provided. When the manufacturer of a Product
Approved side wall horizontally vented gas fueled equipment
does not provide the parts for venting the ue gases, but
identies “special venting systems,” the following requirements
shall be satised by the manufacturer:
1. The referenced "special venting system" instructions shall
be included with the appliance or equipment installation
instructions; and
2. The “special venting systems” shall be Product Approved by
the Board, and the instructions for that system shall include a
parts list and detailed installation instructions.
(e) A copy of all installation instructions for all Product
Approved side wall horizontally vented gas fueled equipment,
all venting instructions, all parts lists for venting instructions,
and/or all venting design
33
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
Hearth & Home Technologies
LIMITED LIFETIME WARRANTY
Hearth & Home Technologies, on behalf of its hearth brands (“HHT”), extends the following warranty for HHT gas, wood, pellet and
electric hearth appliances that are purchased from an HHT authorized dealer.
WARRANTY COVERAGE:
HHT warrants to the original owner of the HHT appliance at the site of installaƟ on, and to any transferee taking ownership of the
appliance at the site of installaƟ on within two years following the date of original purchase, that the HHT appliance will be free from
defects in materials and workmanship at the Ɵ me of manufacture. AŌ er installaƟ on, if covered components manufactured by HHT
are found to be defecƟ ve in materials or workmanship during the applicable warranty period, HHT will, at its opƟ on, repair or replace
the covered components. HHT, at its own discreƟ on, may fully discharge all of its obligaƟ ons under such warranƟ es by replacing the
product itself or refunding the veri ed purchase price of the product itself. The maximum amount recoverable under this warranty
is limited to the purchase price of the product. This warranty is subject to condiƟ ons, exclusions and limitaƟ ons as described below.
WARRANTY PERIOD:
Warranty coverage for consumers begins at the date of installaƟ on. In the case of new home construcƟ on, warranty coverage begins
on the date of rst occupancy of the dwelling or six months aŌ er the sale of the product by an independent, authorized HHT dealer/
distributor, whichever occurs earlier. However, the warranty shall commence no later than 24 months following the date of product
shipment from HHT, regardless of the installaƟ on or occupancy date. The warranty period for parts and labor for covered components
is produced in the following table.
The term “Limited LifeƟ me” in the table below is de ned as: 20 years from the beginning date of warranty coverage for gas appliances,
and 10 years from the beginning date of warranty coverage for wood and pellet appliances. These Ɵ me periods re ect the minimum
expected useful lives of the designated components under normal operaƟ ng condiƟ ons.
Page 1 of 2
4021-645K 1/20
Parts Labor Gas Pellet Wood Electric Venting Components Covered
XX
Igniters, Auger Motors, Electronic Components, and
Glass
X
Electrical components limited to modules, remotes/wall
switches, valves, pilots, blowers, junction boxes, wire
harnesses, transformers and lights (excluding light bulbs)
XX Molded Refractory Panels, Glass Liners
X Vent Free Burners, Vent Free Logs
XX Castings, Medallions and Baffles
6 years 3 years X Catalyst - Limitations Listed
7 years 3 years XX Manifold tubes, HHT Chimney and Terminations
10 years 1 year X Burners, logs and refractory
Limited
Lifetime
3 years XXX
Firebox and heat exchanger, FlexBurn® System
(engine, inner cover,access cover and fireback)
1 Year
None
XXXXXAll replacement parts beyond warranty period
Warranty Period HHT Manufactured Appliances and Venting
All parts including handles, external enamaled
components and other material except as covered by
Conditions, Exclusions, and Limitations listed
2 years
3 years X
x1 Year X X X X
5 years 1 year
Firepots, burnpots, mechanical feeders/auger
assemblies
See conditions, exclusions and limitations on the next page
►
34
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
WARRANTY CONDITIONS:
• This warranty only covers HHT appliances that are purchased through an HHT authorized dealer or distributor. A list of HHT
authorized dealers is available on the HHT branded websites.
• This warranty is only valid while the HHT appliance remains at the site of original installa� on.
• This warranty is only valid in the country in which the HHT authorized dealer or distributor that sold the appliance resides.
• Contact your installing dealer for warranty service. If the installing dealer or distributor is unable to provide necessary parts,
contact the nearest HHT authorized dealer or supplier. Addi� onal service fees may apply if you are seeking warranty service from
a dealer other than the dealer from whom you originally purchased the product.
• Check with your dealer in advance for any costs to you when arranging a warranty call. Travel and shipping charges for parts are not
covered by this warranty.
• Limited Catalyst Warranty
o For wood burning products containing a catalyst, the catalyst will be warranted for a six-year period to the original purchaser at
the site of original installa� on. The purchaser must provide the name, address, and telephone number of the loca� on where
the product is installed, proof of original purchase date, date of failure, and any relevant informa� on regarding the failure of the
catalyst.
WARRANTY EXCLUSIONS:
This warranty does not cover the following:
• Changes in surface nishes as a result of normal use. As a hea� ng appliance, some changes in color of interior and exterior surface
nishes may occur. This is not a aw and is not covered under warranty.
• Damage to printed, plated, or enameled surfaces caused by ngerprints, accidents, misuse, scratches, melted items, or other
external sources and residues le� on the plated surfaces from the use of abrasive cleaners or polishes.
• Repair or replacement of parts that are subject to normal wear and tear during the warranty period are not covered. These parts
include: paint, wood and pellet gaskets, rebricks, grates, ame guides, ba� eries and the discolora� on of glass.
• Expansion, contrac� on, or movement of certain parts causing noise. These condi� ons are normal and complaints related to this
noise are not covered by this warranty.
• Damages resul� ng from: (1) failure to install, operate, or maintain the appliance in accordance with the installa� on instruc� ons,
opera� ng instruc� ons, and lis� ng agent iden� ca� on label furnished with the appliance; (2) failure to install the appliance in
accordance with local building codes; (3) shipping or improper handling; (4) improper opera� on, abuse, misuse, con� nued opera� on
with damaged, corroded or failed components, accident, or improperly/incorrectly performed repairs (5) environmental condi� ons,
inadequate ven� la� on, nega� ve pressure, or dra� ing caused by � ghtly sealed construc� ons, insuffi cient make-up air supply, or
handling devices such as exhaust fans or forced air furnaces or other such causes; (6) use of fuels other than those speci ed in
the opera� on instruc� ons; (7) installa� on or use of components not supplied with the appliance or any other components not
expressly authorized and approved by HHT; (8) modi ca� on of the appliance not expressly authorized and approved by HHT in
wri� ng; and/or (9) interrup� ons or uctua� ons of electrical power supply to the appliance.
• Non-HHT ven� ng components, hearth connec� ons or other accessories used in conjunc� on with the appliance.
• Any part of a pre-exis� ng replace system in which an insert or a decora� ve gas appliance is installed.
• HHT’s obliga� on under this warranty does not extend to the appliance’s capability to heat the desired space. Informa� on is provided
to assist the consumer and the dealer in selec� ng the proper appliance for the applica� on. Considera� on must be given to the
appliance loca� on and con gura� on, environmental condi� ons, insula� on and air � ghtness of the structure.
This warranty is void if:
• The appliance has been over- red, operated in atmospheres contaminated by chlorine, uorine, or other damaging chemicals.
Over- ring can be iden� ed by, but not limited to, warped plates or tubes, deforma� on/warping of interior cast iron structure or
components, rust colored cast iron, bubbling, cracking and discolora� on of steel or enamel nishes.
• The appliance is subjected to prolonged periods of dampness or condensa� on.
• There is any damage to the appliance or other components due to water or weather damage which is the result of, but not limited
to, improper chimney or ven� ng installa� on.
LIMITATIONS OF LIABILITY
• The owner’s exclusive remedy and HHT’s sole obliga� on under this warranty, under any other warranty, express or implied, or in
contract, tort or otherwise, shall be limited to replacement, repair, or refund, as speci ed above. In no event will HHT be liable for
any incidental or consequen� al damages caused by defects in the appliance. Some states do not allow exclusions or limita� on of
incidental or consequen� al damages, so these limita� ons may not apply to you. This warranty gives you speci c rights; you may also
have other rights, which vary from state to state. EXCEPT TO THE EXTENT PROVIDED BY LAW, HHT MAKES NO EXPRESS WARRANTIES
OTHER THAN THE WARRANTY SPECIFICED HEREIN. THE DURATION OF ANY IMPLIED WARRANTY IS LIMITED TO DURATION OF THE
EXPRESSED WARRANTY SPECIFIED ABOVE.
Page 2 of 2
4021-645K 1/20
35
EYF Series Unvented Gas Log Set
Monessen • EYF18/24 Gas Log Heater Installation/Owner's Manual • 65D1009 • Rev G • 01/2020
Monessen, a brand of Hearth & Home Technologies
7571 215th Street West, Lakeville, MN 50044
www.monessenhearth.com
