Comfortflame Whispering24FMN User manual

24" REMOTE CONTROL READY MODELS
LOG AND BURNER SETS:
WHISPERING24FMN(-M) AND WHISPERING24FMP(-M)
Also Design-Certified As Vented Decorative Appliances
Whispering24FMN
Whispering24FMP
Whispering24FMN-M
Whispering24FMP-M
- Do not store or use gasoline or other flammable 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.
• Leave the building immediately.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
- Installation and service must be performed by a qualified installer, service agency or the gas supplier.
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in serious injury, death, or property damage.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
This appliance may be installed in an aftermarket 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
appliance is not convertible for use with other gases.
Installation and Operation Instructions
Models
PFS
®
US
Report No. F09-129
P/N 900554-00 Rev. NC 12/2015
WhisperingTM Unvented (Vent-Free) Gas Log Heaters
WELCOME HOME TO WARMTH
TM
P900554-00
This is an unvented gas-fired 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 Air for Combustion and Ventilation
section on page 5 of this manual.

ComfortFlame.US.com 900554-00 NC2
TABLE OF CONTENTS
Safety............................................................................................. 2
Local Codes ................................................................................... 4
Product Identification..................................................................... 4
Unpacking...................................................................................... 4
Product Features............................................................................ 5
Air for Combustion and Ventilation ................................................ 5
Installation ..................................................................................... 7
Operation ..................................................................................... 15
Cleaning and Maintenance ........................................................... 17
Inspecting Burners....................................................................... 17
Replacement Parts....................................................................... 18
Wiring Diagram............................................................................ 18
Specifications............................................................................... 19
Service Hints................................................................................ 19
Technical Service ......................................................................... 19
Troubleshooting ........................................................................... 20
Parts ............................................................................................ 22
Accessories.................................................................................. 24
Warranty ..................................................................................... 25
Thank you for your purchase. We appreciate your
business!
Please carefully read and follow all instructions in this manual. Pay
special attention to all warnings and safety information.
Following these safety, care, and operation instructions will help
ensure many years of dependable and enjoyable service from your
appliance.
Please read and understand these instructions before installing or
operating.
SAFETY
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause injury
or property damage. Refer to this manual for correct
installation and operational procedures. For assis-
tance or additional information consult a qualified
installer, service agency or the gas supplier.
WARNING: This appliance is for installation only
in a solid-fuel-burning masonry or UL127 factory-built
fireplace or in a listed ventless firebox enclosure. It is
design-certified for these installations in accordance
with ANSI Z21.11.2. Exception: Do not install this
appliance in a factory-built fireplace that includes
instructions stating it has not been tested or should
not be used with unvented gas logs.
This appliance may be installed in an aftermar-
ket,* 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 appliance is not
convertible for use with other gases.
WARNING: Do not allow fans to blow directly
into the appliance. Avoid any drafts that alter burner
flame patterns. Ceiling fans can create drafts that
alter burner flame patterns. Altered burner patterns
can cause sooting.
WARNING: Do not use a blower insert, heat
exchanger insert or other accessory not approved
for use with this heater.
IMPORTANT: Read this owner’s manual carefully
and completely before trying to assemble, operate
or service this appliance. Improper use of this appli-
ance can cause serious injury or death from burns,
fire, explosion, electrical shock and carbon monoxide
poisoning.
WARNING:Thisproductcontains and/or generates
chemicals known to the state of California to cause
cancer or birth defects or other reproductive harm.
WARNING: This is an unvented gas-fired 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 Air for
Combustion and Ventilation section on page 5 of
this manual.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

ComfortFlame.US.com900554-00 NC 3
SAFETY
Continued
Heater base assembly becomes very hot when run-
ning heater. Keep children and adults away from hot
surface to avoid burns or clothing ignition. Heater will
remain hot for a time after shutdown. Allow surface
to cool before touching.
Carefully supervise young children whenthey areinthe
room with heater. When using the hand-held remote
accessory, keep selector switch in the OFF position to
prevent children from turning on burners with remote.
You must operate this heater with a fireplace screen
in place. Make sure fireplace screen is closed before
running heater.
Due to high temperatures, the appliance should be
located out of traffic and away from furniture and
draperies.
Do not place clothing or other flammable material
on or near the appliance. Never place any objects on
the heater.
Keep the appliance area clear and free from combus-
tible materials, gasoline and other flammable vapors
and liquids.
WARNING: Any change to this heater or its con-
trols can be dangerous.
DANGER: Carbon monoxide poisoning may lead
to death!
Carbon Monoxide Poisoning: Early signs of carbon
monoxide poisoning resemble the flu, with headaches,
dizziness or nausea. If you have these signs, the heater
may not be working properly. Get fresh air at once! Have
heater serviced. Some people are more affected by carbon
monoxide than others. These include pregnant women,
people with heart or lung disease or anemia, those under
the influence of alcohol and those at high altitudes.
Natural and Propane/LP Gas: Natural and propane/LP
gases are odorless. An odor-making agent is added to
the gas. The odor helps you detect a gas leak. However,
the odor added to the gas can fade. Gas may be present
even though no odor exists.
Make certain you read and understand all warnings.
Keep this manual for reference. It is your guide to safe
and proper operation of this heater.
1. This appliance is only for use with the type of gas indicated on the
rating plate. This appliance is not convertible for use with other
gases.
2. Do not place propane/LP supply tank(s) inside any structure.
Locate propane/LP supply tank(s) outdoors (propane/LP units
only).
3. If you smell gas
•shut off gas supply
•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 fire department
4. This heater shall not be installed in a bedroom or bathroom, un-
less installed as a vented appliance. See Installing Damper Clamp
Accessory for Vented Operation, page 10. This gas log set may
not be installed as a vented appliance in a bedroom or bathroom
in the Commonwealth of Massachusetts.
5. Before installing in a solid fuel-burning fireplace, the chimney flue
and firebox must be cleaned of soot, creosote, ashes and loose
paint by a qualified chimney cleaner. Creosote will ignite if highly
heated. A dirty chimney flue may create and distribute soot within
the house. Inspect chimney flue for damage. If damaged, repair
flue and firebox before operating heater.
6. Do not burn solid-fuel in a masonry or UL127 factory-built fire-
place in which a vent-free room heater is installed.
7. If fireplace has glass doors, never operate this heater with glass
doors closed. If you operate heater with doors closed, heat buildup
inside fireplace will cause glass to burst. Make sure there are no
obstructions across openings of fireplace.
8. To prevent the creation of soot, follow the instructions in Cleaning
and Maintenance, pages 17 and 18.
9. Before using furniture polish, wax, carpet cleaner or similar products,
turn heater off. If heated, the vapors from these products may create
a white powder residue within burner box or on adjacent walls and
furniture.
10.This heater needs fresh, outside air ventilation to run properly.
This heater has an Oxygen Depletion Sensing (ODS) safety shutoff
system. The ODS shuts down the heater if enough fresh air is
not available. See Air for Combustion and Ventilation, page 5. If
heater keeps shutting off, see Troubleshooting, pages 20 and 21.
11.Do not run heater
•where flammable liquids or vapors are used or stored
•under dusty conditions
12.Do not use this heater to cook food or burn paper or other objects.

ComfortFlame.US.com 900554-00 NC4
Figure 1 - Product Identification
Five Piece
Log Set
Piezo
Igniter
Flame Adjustment
Knob
Optional
Selector
Switch
Control
Knob
Base
Assembly
1. Remove logs and heater base assembly from carton.
NOTE: Do not pick up heater base assembly by burners. This
could damage heater. Always handle base assembly by grate.
2. Remove all protective packaging applied to logs and heater for
shipment.
3. Check appliance for any shipping damage. If appliance is dam-
aged, promptly inform dealer where you purchased the appliance.
SAFETY
Continued
Install and use appliance with care. Follow all local codes. In the
absence of local codes, use the latest edition of The National Fuel
Gas Code ANSI Z223.1/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
25 West 43rd Street, 4th floor
New York, NY 10036
National Fire Protection Association, Inc.
1 Batterymarch Park
Quincy, MA 02169-7471
NOTE: Where listed vented decorative logs are required, thermostat
operation is not permitted.
State of Massachusetts: The installation must be made by a
licensed plumber or gas fitter in the Commonwealth of Mas-
sachusetts.
Sellers of unvented propane or natural gas-fired supplemental
room heaters shall provide to each purchaser a copy of 527
CMR 30 upon sale of the unit.
Vent-free gas products are prohibited for bedroom and bath-
room installation in the Commonwealth of Massachusetts.
CAUTION: Do not remove data plates from grate
assembly. Data plates contain important warranty
and safety information.
UNPACKING
13.Do not use heater if any part has been exposed to or under water.
Immediately call a qualified 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.
14.Do not operate heater if any log is broken. Do not operate heater
if a log is chipped (dime-sized or larger).
15.Turn heater off and let cool before servicing, installing or repair-
ing. Make sure the selector switch is in the OFF position. Only a
qualified service person should install, service or repair heater.
16.Make sure the selector switch is in the OFF position when you
are away from home for long periods of time.
17.Operating heater above elevations of 4,500 feet may cause pilot
outage.
18.To prevent performance problems, do not use propane/LP fuel
tank of less than 100 lb. capacity (propane/LP units only).
19.Provide adequate clearances around air openings.
LOCAL CODES
PRODUCT IDENTIFICATION
COMMONWEALTH OF MASSACHUSETTS REQUIREMENTS
These appliances are approved for installation in the US state of
Massachusetts if the following additional requirements are met:
• Un-vented Room Heaters shall be installed in accordance with
527 CMR 30.
• Installation and repair must be done by a plumber or gas fitter
licensed in the Commonwealth of Massachusetts.
• The flexible gas line connector used shall not exceed 36 inches
(92 centimeters) in length.
• The individual manual shut-off must be a T-handle type valve.
• Unvented appliances may NOT be installed in bedrooms or
bathrooms.
• A working smoke detector must be installed in the area where
vent-free appliances are installed.
Seller of unvented propane or natural gas-fired supplemental room
heaters shall provide to each purchaser a copy of 527 CMR 30 upon
sale of the unit.

ComfortFlame.US.com900554-00 NC 5
AIR FOR COMBUSTION AND VENTILATION
OPERATION
This heater is clean burning. It requires no outside venting. There
is no heat loss out a vent or up a chimney. Heat is generated by
both realistic flames and glowing coals. This heater is designed for
vent-free operation with flue damper closed. It has been tested and
approved to the ANSI Z21.11.2 standard for unvented heaters. State
and local codes in some areas prohibit the use of vent-free heaters.
This appliance may also be operated as a vented decorative (ANSI
Z21.60) product by opening the flue damper.
SAFETY DEVICE
This heater has a pilot with an Oxygen Depletion Sensing (ODS)
safety shutoff system. The ODS/pilot is a required feature for vent-
free room heaters. The ODS/pilot shuts off the heater if there is not
enough fresh air.
PIEZO IGNITION SYSTEM
This heater has a piezo Igniter. This system requires no matches,
batteries or other sources to light heater.
Today’s homes are built more energy efficient than ever. New materials,
increased insulation and new construction methods help reduce heat
loss in homes. Homeowners apply weather strip and caulk around
windows and doors to keep the cold air out and the warm air in. During
heating months, homeowners want their homes as airtight as possible.
While it is good to make your home energy efficient, your home
needs to breathe. Fresh air must enter your home. All fuel-burning
appliances need fresh air for proper combustion and ventilation.
Exhaust fans, some fireplaces, clothes dryers and some fuel-burning
appliances draw air from the house to operate. You must provide ad-
equate fresh air for these appliances. That will ensure proper venting
of vented fuel-burning appliances.
PROVIDING ADEQUATE VENTILATION
The following are excerpts from National Fuel Gas Code, ANSI Z223.1/
NFPA 54, Air for Combustion and Ventilation.
All spaces in homes fall into one of the three following ventilation
classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 5 through 7 will help you classify your
space and provide adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and windows may provide enough
fresh air for combustion and ventilation. However, in buildings of
unusually tight construction, you must provide additional fresh air.
Unusually tight construction is defined as construction where:
a. walls and ceilings exposed to the outside atmosphere have a
continuous water vapor retarder with a rating of one perm (6 x
10-11 kg per pa-sec-m2) or less with openings gasketed or sealed
and
b. weather stripping has been added on openable windows and
doors and
c. caulking or sealants are applied to areas such as joints around
window and door frames, between sole plates and floors, be-
tween wall-ceiling joints, between wall panels, at penetrations
for plumbing, electrical and gas lines and at other openings.
If your home meets all three criteria above, you must provide ad-
ditional fresh air. See Ventilation Air From Outdoors, page 7.
If your home does not meet all three criteria above, proceed to De-
termining Fresh-Air Flow For Heater Location, page 6.
Confined and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1/NFPA54 allows two meth-
ods for determining whether the space in which the heater is being
installed is confined or unconfined space. The standard method
defines a confined space as a space whose volume is less than 50
cubic feet per 1,000 Btu per hour (4.8 m3per kw) of the aggregate
input rating of all appliances installed in that space and an unconfined
space as a space whose volume is not less than 50 cubic feet per
1,000 Btu per hour (4.8 m3per 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 the unconfined space.
Where the air infiltration rate of a structure is known, the Known Air
Infiltration Rate Method may be used. Follow The National Fuel Gas
Code, ANSI Z223.1/NFPA 54 to use this method to determine if the
space is confined or unconfined.
* Adjoining rooms are communicating only if there are doorless
passageways or ventilation grills between them.
WARNING: 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.Readthe followinginstructionsto ensureproper
fresh air for this and other fuel-burning appliances in
your home.
PRODUCT FEATURES

ComfortFlame.US.com 900554-00 NC6
AIR FOR COMBUSTION AND VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space Using
the Standard Method
Use this work sheet to determine if you have a confined or uncon-
fined space.
Space: Includes the room in which you will install heater plus any
adjoining rooms with doorless passageways or ventilation grills
between the rooms.
1. Determine the volume of the space (length x width x height).
Length x Width x Height =__________cu. ft. (volume of space)
Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling
height) = 2560 cu. ft. (volume of space)
If additional ventilation to adjoining room is supplied with grills
or openings, add the volume of these rooms to the total volume
of the space.
2. Multiply the space volume by 20 to determine the maximum Btu/Hr
the space can support.
_______ (volume of space) x 20 = (Maximum Btu/Hr the space
can support)
Example: 2560 cu. ft. (volume of space) x 20 = 51,200 (maximum
Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel-burning appliances in the space.
Vent-free fireplace ________Btu/Hr
Gas water heater* ________Btu/Hr
Gas furnace ________Btu/Hr
Vented gas heater ________Btu/Hr
Gas fireplace logs ________Btu/Hr
Other gas appliances* + ____Btu/Hr
Total = _______Btu/Hr
* Do not include direct-vent gas appliances. Direct-vent draws
combustion air from the outdoors and vents to the outdoors.
Example:
Gas water heater 40,000 Btu/Hr
Vent-free fireplace + 33,000 Btu/Hr
Total = 73,000 Btu/Hr
4. Compare the maximum Btu/Hr the space can support with the actual
amount of Btu/Hr used.
_____Btu/Hr (maximum the space can support)
_____
Btu/Hr (actual amount of Btu/Hr used)
Example:51,200 Btu/Hr (maximum the space can support)
73,000 Btu/Hr (actual amount of Btu/Hr used)
The space in the above example is a confined space because the actual
Btu/Hr used is more than the maximum Btu/Hr the space can support.
You must provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the
extra space provides an unconfined space, remove door to adjoin-
ing room or add ventilation grills between rooms. See Ventilation
Air From Inside Building, page 6.
B. Vent room directly to the outdoors. See Ventilation Air From
Outdoors, page 7.
C. Install a lower Btu/Hr appliance, if lower Btu/Hr size makes room
unconfined.
If the actual Btu/Hr used is less than the maximum Btu/Hr the space
can support, the space is an unconfined space. You will need no
additional fresh air ventilation.
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining unconfined space. When
ventilating to an adjoining unconfined space, you must provide two
permanent openings: one within 12" of the ceiling and one within
12" of the floor on the wall connecting the two spaces (see options
1 and 2, Figure 2). You can also remove door into adjoining room
(see option 3, Figure 2). Follow the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, Air for Combustion and Ventilation for required size
of ventilation grills or ducts.
Figure 2 - Ventilation Air from Inside Building
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills Into
Adjoining
Room,
Option 1
12"
12"
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 providedby 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.

ComfortFlame.US.com900554-00 NC 7
AIR FOR COMBUSTION AND VENTILATION
Continued
Figure 3 - Ventilation Air from Outdoors
Outlet
Air
Ventilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
INSTALLATION
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation grills or ducts. You must
provide two permanent openings: one within 12" of the ceiling and
one within 12" of the floor. Connect these items directly to the out-
doors or spaces open to the outdoors. These spaces include attics
and crawl spaces. Follow the National Fuel Gas Code, ANSI Z223.1/
NFPA 54, Air for Combustion and Ventilation for required size of
ventilation grills or ducts.
IMPORTANT:Do not provide openings for inlet or outlet air into attic
if attic has a thermostat-controlled power vent. Heated air entering
the attic will activate the power vent.
NOTICE: This heater is intended for use as supple-
mental heat. Use this heater along with your primary
heating system. Do not install this heater as your
primary heat source. If you have a central heating
system, you may run system’s circulating blower
while using heater. This will help circulate the heat
throughout the house. In the event of a power outage,
you can use this heater as your primary heat source.
WARNING: Never install the heater
• in a bedroom or bathroom unless installed as a
vented appliance, see page 10
• in a recreational vehicle
• where curtains, furniture, clothing or other flam-
mable objects are less than 36" from front and 42"
from top of heater; for side clearances see Figure
4, page 8
• in high traffic areas
• in windy or drafty areas
WARNING:Before installingin a solidfuel-burning
fireplace, the chimney flue and firebox must be
cleaned of soot, creosote, ashes and loose paint by
a qualified chimney cleaner. Creosote will ignite if
highly heated. A dirty chimney flue and firebox may
create and distribute soot within the house. Inspect
chimney flue for damage. If damaged, repair flue
before operating heater.
CAUTION: This heater creates warm air currents.
These currents move heat to wall surfaces next to
heater. Installing heater next to vinyl or cloth wall
coverings or operatingheater where impurities (such
as, but not limited to, tobacco smoke, aromatic
candles,cleaning fluids, oil or kerosene lamps,etc.)
in the air exist, may discolor walls or cause odors.
IMPORTANT: Vent-free heaters add moisture to the air.
Although this is beneficial, installing heater in rooms
without enough ventilation air may cause mildew to
form from too much moisture. See Air for Combustion
and Ventilation,page 5.
WARNING: Seal any fresh air vents or ash clean-
out doors located on floor or wall of fireplace. If
not, drafting may cause pilot outage or sooting.
Use a heat-resistant sealant. Do not seal chimney
flue damper.
WARNING: Make sure the selector switch is in
the OFF position before installing heater.
NOTICE: State or local codes may only allow operation
of this appliance in a vented configuration. Check your
state or local codes.
WARNING: A qualifiedservice personmust install
heater. Follow all local codes.

ComfortFlame.US.com 900554-00 NC8
INSTALLATION
Continued
Minimum Clearances For Side Combustible Material, Side Wall and
Ceiling
A. Clearances from the side of the fireplace cabinet to any combus-
tible material and wall should follow diagram in Figure 4.
Example: The face of a mantel, bookshelf, etc. is made of combus-
tible material and protrudes 3-1/2" from the wall. This combustible
material must be 4" from the side of the fireplace cabinet (see
Figure 4).
NOTE: When installing your gas logs into a manufactured firebox,
follow firebox manufacturer’s instructions for minimum clear-
ances to combustible materials.
B. Clearances from the top of the fireplace opening to the ceiling
should not be less than 42".
Figure 4 - Minimum Clearance for Combustible to Wall
Minimum Noncombustible Material Clearances If Not Using
Mantel
NOTE: If using a mantel proceed to If Using Mantel, page 9. If not
using a mantel, follow the information on this page.
You must have noncombustible material(s) above the fireplace opening.
Noncombustible materials (such as slate, marble, tile, etc.) must be
at least 1/2" thick. With sheet metal, you must have noncombustible
material behind it. Noncombustible material must extend at least 8"
up (for all models). If noncombustible material is less than 12", you
must install the fireplace hood accessory (24" Models Only). See
Figure 5 for minimum clearances.
LOG SIZING REQUIREMENTS
Log Size
Minimum Firebox
Height Depth Front Width
Rear
* Width
24" 17" 13.5" 28" 20.5"
* Measured at 13.5" depth.
Carefully follow these instructions. This will ensure safe installation into a
masonry, UL127-listed manufactured fireplace or listed vent-free firebox.
NOTICE: Manual control heaters may be used as
a vented product. If so, you must always run heater
with chimneyflue damper open.If runningheater with
damper open, noncombustible material above fire-
place opening is not needed. Go to Installing Damper
Clamp Accessory for Vented Operation, page 10.
MINIMUM FIREPLACE CLEARANCE
TO COMBUSTIBLE MATERIALS
Side Wall 16", Ceiling 42", Front 36"
WARNING: Maintain the minimum clearances. If
youcan, providegreaterclearances from floor,ceiling
and adjoining wall.
WARNING: This appliance is equipped for either
natural gas or propane/LP gas but not both. Gas type
is indicated on the rating plate. Field conversion is
not permitted.
CHECK GAS TYPE
Use the correct gas type (natural or propane/LP) for your unit. If your
gas supply is not correct, do not install log set. Call dealer where you
bought log set for proper type fireplace.
INSTALLATION AND CLEARANCES FOR VENT-FREE OPERATION
*Minimum 16 inches from Side Wall
*
Example
Noncombustible
Material Distance (A)
Requirements for Safe Installation
12" or more Noncombustible material okay.
Between 8" and 12" Install fireplace hood accessory (GA6050 -
see Accessories, page 24).
Less than 8"
Noncombustible material must be extended
to at least 8". See Between 8" and 12",
above. If you cannot extend material, you
must operate heater with flue damper open.

ComfortFlame.US.com900554-00 NC 9
INSTALLATION
Continued
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.)
Above Fireplace
NOTICE: Surface temperatures of adjacent walls and
mantels become hot during operation. Walls and
mantels above the firebox may become hot to the
touch. If installed properly, these temperatures meet
the requirement of the national product standard. Fol-
low all minimum clearances shown in this manual.
NOTICE: If yourinstallation does notmeet the minimum
clearances shown, you must do one of the following:
• operate the logs only with the flue damper open
• raise the mantel to an acceptable height
• remove the mantel
Heat Resistant
Material
Minimum
Noncombustible
Material
Minimum Non-
Combustible
Material Height
Distances to
Underside of
Mantel
Top of
Fireplace
Opening
Underside of
Mantel Shelf
Mantel Shelf
12"
8"
(A)
18"
8"
20"
14"
22"
17"
24"
20"
Log Set
24" Models
18" Model
2 ½"
6"
8"
10"
Figure 6 - Minimum Mantel Clearances Without Using Hood
Minimum
Noncombustible
Material
8"
Min.
12" 15" 18" 20"
2½"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050)
Top of
Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
Figure 7 - Minimum Mantel Clearances When Using Hood
If Using Mantel
You must have noncombustible material(s) above the fireplace opening.
Noncombustible materials (such as slate, marble, tile, etc.) must be
at least 1/2" thick. With sheet metal, you must have noncombustible
material behind it. Noncombustible material must extend at least 8
inches up (for all models). If noncombustible material is less than
12", you must install the fireplace hood accessory. Even if noncom-
bustible material is more than 12", you may need the hood accessory
to deflect heat away from your mantel shelf. See Figure 5, page 9,
and Figures 6 and 7 for minimum clearances.
IMPORTANT:If you cannot meet these minimum clearances, you
must operate heater with chimney flue damper open. Go to Installing
Damper Clamp Accessory for Vented Operation, page 10.
MANTEL CLEARANCES
In addition to meeting noncombustible material clearances, you
must also meet required clearances between fireplace opening and
mantel shelf. If you do not meet the clearances listed below, you will
need a hood.
Determining Minimum Mantel Clearance
If you meet minimum clearance between mantel shelf and top of
fireplace opening, a hood is not required (see Figure 6).
Determining Minimum Mantel Clearance When Using a Hood
If minimum clearances in Figure 6, are not met, you must have a hood.
When using a hood there are still certain minimum mantel clearances
required. Follow minimum clearances shown in Figure 7 when using
hood.
Minimum clearance requirements include any projections such
as shelves, window sills, mantels, etc. above the appliance.

ComfortFlame.US.com 900554-00 NC10
INSTALLATION
Continued
Figure 8 - Minimum Fireplace Clearances If Installed at Floor
Level
Figure 9 - Minimum Fireplace Clearances Above Combustible
Flooring
FLOOR CLEARANCES
A. If installing appliance on the floor level, you must maintain the
minimum distance of 14" to combustibles (see Figure 8).
B. If combustible materials are less than 14" to the fireplace, you
must install appliance at least 5" above the combustible flooring
(see Figure 9).
INSTALLING DAMPER CLAMP ACCESSORY FOR VENTED
OPERATION
NOTE: When used as a vented heater, appliance must be installed only
in a solid-fuel-burning fireplace with a working flue and constructed
of noncombustible material.
For Massachusetts Residents Only: Installation of this vented gas
log set in the Commonwealth of Massachusetts requires the damper
be permanently removed or welded in the fully open position.
If your heater is a manually-controlled model, you may use this
heater as a vented product. There are three reasons for operating
your heater in the vented mode.
1. The fireplace does not meet the clearance to combustibles requirements
for vent-free operation.
2. State or local codes do not permit vent-free operation.
3. You prefer vented operation.
If reasons number 1 or 2 apply to you, you must permanently
open chimney flue damper. You must install the damper clamp
accessory (to order, see Accessories, page 24). This will ensure
vented operation (see Figure 10). The damper clamp will keep damper
open. Installation instructions are included with clamp accessory.
See chart for minimum permanent flue opening you must provide.
Attach damper clamp so the minimum permanent flue opening will
be maintained at all times.
Chimney
Height
Minimum Permanent
Flue Opening
6' to 15' 39 sq. in.
15' to 30' 29 sq. in.
Figure 10 - Attaching Damper Clamp
Area of Various Standard Round Flues
Diameter Area
5" 20 sq. in.
6" 29 sq. in.
7" 39 sq. in.
8" 51 sq. in.
Damper
Clamp
Manufactured Fireplace
Masonry Fireplace
Damper
Clamp
Damper
Damper
Damper
WARNING: You must secure this heater to fire-
place floor. If not, heater will move when you adjust
controls. Moving heater may cause a gas leak or
log misplacement.
WARNING: If installing in a sunken fireplace,
special care is needed. You must raise the fireplace
floor to allow access to heater control panel. This will
ensure adequate air flow and guard against sooting
and controls being damaged. Raise fireplace floor
with noncombustible material. Make sure material
is secure.
IMPORTANT: Make sure the heater burners are level. If
heater is not level, heater will not work properly.
CAUTION: Do not pick up heater base assembly
by burners. This could damage heater. Only handle
base assembly by grates.
14"
Min.
Combustible
Material
Noncombustible Material
Noncombustible Material
Combustible Material
INSTALLING HEATER BASE ASSEMBLY
Hearth
5"
Min.
Combustible
Material
Hearth
Combustible Material

ComfortFlame.US.com900554-00 NC 11
Installation Items Needed
• hardware package (provided with heater)
• approved flexible gas hose and fittings (not provided) (if allowed
by local codes)
• sealant (resistant to propane/LP gas, not provided)
• electric drill with 3/16" drill bit (metal or masonry as applicable)
• flathead screwdriver
• pipe wrench
1. Connect approved flexible gas hose to gas control fitting in heater
(see Figure 11).
2. Locate two masonry screws in hardware package.
3. Place heater base in fireplace.
4. Place logs in their proper position on heater base (see Installing
Logs, page 14).
5. Center heater base and logs front-to-back and side-to-side in
fireplace.
6. Carefully remove logs without moving heater base.
7. Mark screw locations through one hole on each side of the mount-
ing bracket (see Figure 12). If installing in a brick-bottom fireplace,
mark screw locations in mortar joint of bricks.
8. Remove heater base from fireplace. If installing optional control
accessories, do so at this time. Follow all directions provided with
accessory.
9. Drill holes at marked locations using 3/16" drill bit.
10.Attach base assembly to fireplace floor using two masonry screws
(in hardware package).
Figure 11 - Attaching Flexible Gas Hose to Heater
Flexible Gas Hose
(if allowed by local codes)
Fitting
INSTALLATION
Continued
IMPORTANT: Hold gas fitting with wrench when connecting flex-
ible gas hose.
WARNING: This appliance requires a 3/8" NPT
(National Pipe Thread) inlet connection to the pres-
sure regulator.
CAUTION: Never connect propane/LP appliance
directly to the propane/LP supply. This heater re-
quires an external regulator (not supplied). Install
the external regulator between the heater and pro-
pane/LP supply.
WARNING: Never connect natural gas appli-
ance to private (non-utility) gas wells. This gas
is commonly known as wellhead gas.
WARNING: A qualified service person must con-
nect appliance to gas supply. Follow all local codes.
Figure 12 - Attaching Base to Fireplace Floor
Masonry
Screw
Mounting
Bracket
CONNECTING TO GAS SUPPLY

ComfortFlame.US.com 900554-00 NC12
INSTALLATION
Continued
Installation Items Needed
Before installing heater, make sure you have the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A equipment shutoff valve with 1/8" NPT tap is an acceptable al-
ternative to test gauge connection. Purchase the optional equipment
shutoff valve from your dealer.
For propane/LP units, the installer must supply an external regulator.
The external regulator will reduce incoming gas pressure. You must
reduce incoming gas pressure to between 11" and 14" of water. If
you do not reduce incoming gas pressure, heater regulator damage
could occur. Install external regulator with the vent pointing down as
shown in Figure 14. Pointing the vent down protects it from freezing
rain or sleet.
Figure 13 - External Regulator With Vent Pointing Down
External
Regulator
Propane/LP
Supply Tank
Vent Pointing
Down
* Purchase the optional equipment shutoff valve from your dealer.
** Minimum inlet pressure for purpose of input adjustment.
Figure 14 - Gas Connection
Gas Control
3” Minimum
Equipment Shutoff Valve
With 1/8" NPT Tap*
Approved Flexible
Gas Hose (if allowed
by local codes)
PROPANE/LP
From External Regulator
(11" W.C.** to 14" W.C.
Pressure)
NATURAL
From Gas Meter
(5" W.C.** to
10.5" W.C.
Pressure)
Cap Pipe Tee
Nipple Joint
Sediment Trap
CAUTION: Use only new, black iron or steel
pipe. Internally-tinned copper tubing may be used
in certain areas. Check your local codes. Use pipe
of 1/2" diameter or greater to allow proper gas
volume to heater. If pipe is too small, undue loss
of volume will occur.
IMPORTANT: Install equipment shutoff valve in an accessible loca-
tion. The equipment shutoff valve is for turning on or shutting off
the gas to the appliance.
CAUTION: Avoid damage to gas control. Hold
gas fitting with wrench when connecting it to gas
piping and/or fittings.
WARNING: Use pipe joint sealant that is resistant
to liquid petroleum (LP) gas.
Installation must include an equipment shutoff valve, union and
plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from heater (see Figure 14).
Check your building codes for any special requirements for locating
equipment shutoff valve to appliances.
Apply pipe joint sealant lightly to male NPT threads. This will prevent
excess sealant from going into pipe. Excess sealant in pipe could
result in clogged heater valves.
We recommend that you install a sediment trap in supply line as shown
in Figure 14. Locate sediment trap where it is within reach for clean-
ing. Install in piping system between fuel supply and heater. Locate
sediment trap where trapped matter is not likely to freeze. A sediment
trap traps moisture and contaminants. This keeps them from going
into heater controls. If sediment trap is not installed or is installed
wrong, heater may not run properly.

ComfortFlame.US.com900554-00 NC 13
CAUTION: Make sure external regulator has been
installed between propane/LPsupply and heater. See
guidelinesunder Connecting to Gas Supply,page 11.
WARNING: Never use an open flame to check for
a leak. Apply a noncorrosive leak detection fluid to
all joints. Bubbles forming show a leak. Correct all
leaks at once.
WARNING: Test all gas piping and connections,
internal and external to unit, for leaks after installing
or servicing. Correct all leaks at once.
INSTALLATION
Continued
PRESSURE TESTING GAS SUPPLY PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)
1. Disconnect appliance with its appliance main gas valve (control
valve) and equipment shutoff valve from gas supply piping system.
Pressures in excess of 1/2 psig will damage heater regulator.
2. Cap off open end of gas pipe where equipment shutoff valve was
connected.
3. Pressurize supply piping system by either opening propane/LP
supply tank valve for propane/LP gas or opening main gas valve
located on or near gas meter for natural gas or using compressed
air.
4. Check all joints of gas supply piping system. Apply noncorrosive
leak detection fluid to all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff valve to gas supply.
Check reconnected fittings for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 15).
2. Pressurize supply piping system by either opening propane/LP
supply tank valve for propane/LP gas or opening main gas valve
located on or near gas meter for natural gas or using compressed
air.
3. Check all joints from gas meter to equipment shutoff valve for natural
gas or propane/LP supply to equipment shutoff valve for propane/LP
(see Figures 16 and 17). Apply noncorrosive leak detection fluid to
all joints. Bubbles forming show a leak.
4. Correct all leaks at once.
Figure 15 - Equipment Shutoff Valve
Figure 16 - Checking Gas Joints (Propane/LP Model Shown)
Figure 17 - Checking Gas Joints (Natural Gas Only)
Gas Control
Valve Location
Propane/LP
Supply Tank Equipment Shutoff Valve
Gas Meter
Gas Control Valve Location
Equipment Shutoff Valve
CHECKING GAS CONNECTIONS
Open
Closed
Equipment
Shutoff Valve
The appliance and its appliance main gas valve must be discon-
nected from the gas supply piping system during any pressure
testing of that system at test pressures in excess of 1/2 psi (3.5
kPa).
The appliance must be isolated from the gas supply piping sys-
tem by closing its equipment shutoff valve during any pressure
testing of the gas supply piping system at test pressures equal
to or less than 1/2 psi (3.5 kPa).

ComfortFlame.US.com 900554-00 NC14
INSTALLATION
Continued
It is very important to install these logs exactly as instructed. Do not
modify logs. Only use logs supplied with heater.
1. Place rear log (#1) onto base. Holes in bottom of log must seat
over pins on base as shown in Figure 18.
2. Place middle log (#2) onto base. Holes in bottom of log must seat
over pins on base as shown in Figure 18.
3. Place front log (#3) onto grate as shown in Figure 19.
4. Place left top log (#4) as shown in Figure 20. Match square peg
on top of rear log (#1) with square hole on bottom of left top log
(#4). Match round peg on top of middle log (#2) with round hole
on bottom of left top log (#4).
5. Place right top log (#5) as shown in Figure 20. Match square peg
on top of rear log (#1) with square hole on bottom of right top log
(#5). Match round peg on top of front log (#3) with round hole
on bottom of right top log (#5).
Figure 18 - Installing Rear and Middle Logs
Figure 19 - Installing Front Log
Burner
Middle Log
Rear Log
Pin for
Hole in
Bottom
of Log
Front Log
Grate
Figure 20 - Installing Left and Right Logs
Left Top Log
Square Peg
on Rear Log
Round Peg on
Middle Log
Right
Top Log
Round Peg
on Front Log
WARNING: Failure to position the parts in ac-
cordance with these diagrams or failure to use only
parts specifically approved with this heater may
result in property damage or personal injury.
CAUTION: After installation and periodically
thereafter, check to ensure that no flame comes in
contact with any log. With the heater set to HI, check
to see if flames contact any log. If so, reposition logs
according to the log installation instructions in this
manual. Flames contacting logs will create soot.
PRESSURE TESTING HEATER GAS CONNECTIONS
1. Open equipment shutoff valve (see Figure 17, page 13).
2. Open main gas valve located on or near gas meter for natural gas
or open propane/LP supply tank valve.
3. Make sure control knob of heater is in the OFF position.
4. Check all joints from equipment shutoff valve to gas control (see
Figures 16 and 17, page 13). Apply noncorrosive leak detection
fluid to all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operation, page 15). Check all other internal
joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 16).
INSTALLING LOGS

ComfortFlame.US.com900554-00 NC 15
WARNING: Damper handle will be hot if heater
has been running.
WARNING: If you do not follow these instructions
exactly, a fire or explosion may result causing property
damage, personal injury or loss of life.
WARNING: If fireplace has glass doors, never
operate this heater with glass doors closed. If you
operate heater withdoors closed, heat buildupinside
fireplace will cause glass to burst. Make sure there
are no obstructions across opening of fireplace.
WARNING: Burners will come on automatically
within one minute when the selector switch is in the
ON position after the pilot is lit.
NOTICE: During initial operation of new heater, burn-
ing logs will give off a paper-burning smell. Orange
flame will also be present. Open damper or window
to vent smell. This will only last a few hours.
WARNING: You must operate this heater with
a fireplace screen in place. Make sure fireplace
screen is closed before running heater.
OPERATION
A.This appliance has a pilot which must be lighted by hand. When
lighting the pilot, follow these instructions exactly.
B.BEFORE LIGHTING smell all around the appliance area for gas. Be
sure to smell next to the floor because some gas is heavier than
air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not use any phone in your
building.
• Immediately call your gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
C. Use only your hand to 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 qualified service technician or gas supplier. Force
or attempted repair may result in a fire or explosion.
D. Do not use this appliance if any part has been under water. Imme-
diately call a qualified service technician to inspect the appliance
and to replace any part of the control system and any gas control
which has been under water.
4. Press in and turn control knob clockwise to the OFF
position (see Figure 21).
5. Wait five (5) minutes to clear out any gas. Then smell for gas,
including near the floor. If you smell gas, STOP! Follow “B” in
the safety information on this page. If you don’t smell gas, go to
the next step.
6. Press in and turn control knob counterclockwise to the
PILOT position. Press in control knob for five (5) seconds (see
Figure 21).
NOTE: You may be running this heater for the first time after
hooking up to gas supply. If so, the control knob may need to be
pressed in for 30 seconds or more. This will allow air to bleed
from the gas system.
7. With control knob pressed in, press and release Igniter button.
This will light pilot. The pilot is attached to the front burner. If
needed, keep pressing Igniter button until pilot lights.
Figure 21 - Control Knob and Igniter Button Location
(Shown as Supplied, No Control Options)
Flame Adjustment Knob Control Knob
Igniter Button Selector Switch in OFF Position
NOTE: Homeowners generally prefer to operate their heater with
the chimney damper closed. This will put all the heat into the room.
However, there may be times you will desire the full flames of the
HI heat setting but will find the heat output excessive. You can open
the chimney damper (if you have one) fully or partially to release
some of the heat.
1. STOP! Read the safety information on this page.
2. Make sure equipment shutoff valve is fully open.
3. Set selector switch in the OFF position.
FOR YOUR SAFETY
READ BEFORE LIGHTING
LIGHTING
INSTRUCTIONS

ComfortFlame.US.com 900554-00 NC16
OPERATION
Continued
1. Turn control knob clockwise to the OFF position.
2a. Set selector switch in the OFF position.
2b.If Using Optional Hand-Held Remote: Set selector switch in the
OFF position to prevent draining battery.
3. Close equipment shutoff valve (see Figure 17, page 13).
Figure 22 - Pilot (Propane/LP)
Igniter
Electrode
Figure 23 - Pilot (Natural)
Pilot Burner
1. Follow steps 1 through 6 under Lighting Instructions, pages 15
and 16.
2. Depress control knob and light pilot with match.
3. Keep control knob pressed in for 30 seconds after lighting pilot. After
30 seconds, release control knob. Now follow steps 9 through 11
under Lighting Instructions, pages 15 and 16.
NOTE: If pilot does not stay lit, contact a qualified service person
or gas supplier for repairs. Until repairs are made, light pilot with
match. To light pilot with match, see Manual Lighting Procedure,
page 16.
8. Keep control knob pressed in for 30 seconds after lighting pilot.
After 30 seconds, release control knob.
•If control knob does not pop out when released, contact a quali-
fied service person or gas supplier for repairs.
NOTE: If pilot goes out, repeat steps 4 through 8.
9. Slightly push in and turn control knob counterclockwise to
the ON position.
10.Wait one minute and switch selector switch to the ON position to
light burners.
NOTE: AUTO is only functional when using GWMT1 or GWMS2
optional accessories.
11.Set flame adjustment knob to any level between HI and LO.
12.To leave pilot lit and shut off burners only: turn control knob
clockwise to the PILOT position, or use remote control
manual OFF button, or set selector switch in the OFF position.
WARNING: Make sure the selector switch is in the
OFF position when you are away from home for long
periods of time. Heater will come on automatically
with selector switch in the ON position.
CAUTION: Do not try to adjust heating levels by
using the equipment shutoff valve.
TO TURN OFF GAS
TO APPLIANCE
MANUAL LIGHTING
PROCEDURE
Igniter Electrode
Pilot Burner

ComfortFlame.US.com900554-00 NC 17
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the holes in the fitting at the
burner entrance. These holes may become blocked with dust or lint.
Periodically inspect these holes for any blockage and clean if needed.
Blocked air holes will create soot.
MAIN BURNER
Periodically inspect all burner flame holes with the heater running.
All slotted burner flame holes should be open with yellow flame
present. All round burner flame holes should be open with a small
blue flame present. Some burner flame holes may become blocked
by debris or rust, with no flame present. If so, turn off heater and let
cool. Remove blockage. Blocked burner flame holes will create soot.
INSPECTING BURNERS
Check pilot flame pattern and burner flame patterns often.
PILOT FLAME PATTERN
Figure 24 shows a correct pilot flame pattern. Figure 25 shows an
incorrect pilot flame pattern. The incorrect pilot flame is not touching
the thermocouple. This will cause the thermocouple to cool. When
the thermocouple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown in Figure 32
• turn heater off (see To Turn Off Gas to Appliance, page 16)
• see Troubleshooting, pages 20 and 21.
NOTE: The pilot flame on natural gas units will have a slight curve,
but flame should be blue and have no yellow or orange color.
Figure 24 - Correct Pilot Flame Pattern (Your pilot may vary
from pilot shown)
Pilot Burner Thermocouple
Pilot Burner Thermocouple
Figure 25 - Incorrect Pilot Flame Pattern (Your pilot may
vary from pilots shown)
WARNING: Failure to keep the primary air
opening(s) of the burner(s) clean may result in
sooting and property damage.
CAUTION: You must keep control areas, burners
and circulating air passageways of heater clean.
Inspect these areas of heater before each use. Have
heater inspected yearly by a qualified service per-
son. Heater may need more frequent cleaning due
to excessive lint from carpeting, pet hair, bedding
material, etc.
WARNING: Turn off heater and let cool before
cleaning.
CLEANING AND MAINTENANCE
BURNER ORIFICE HOLDER AND PILOT AIR INLET HOLE
The primary air inlet holes allow the proper amount of air to mix with
the gas. This provides a clean burning flame. Keep these holes clear
of dust, dirt, lint and pet hair. Clean these air inlet holes prior to each
heating season. Blocked air holes will create soot. We recommend
that you clean the unit every three months during operation and have
heater inspected yearly by a qualified service person.
We also recommend that you keep the burner tube and pilot assembly
clean and free of dust and dirt. To clean these parts we recommend
using compressed air no greater than 30 PSI. Your local computer
store, hardware store or home center may carry compressed air in a
can. If using compressed air in a can, please follow the directions on
the can. If you don’t follow directions on the can, you could damage
the pilot assembly.
1. Shut off the unit, including the pilot. Allow the unit to cool for at
least thirty minutes.
2. Inspect burner, pilot and primary air inlet holes on orifice holder
for dust and dirt (see Figures 26 and 27).

ComfortFlame.US.com 900554-00 NC18
CLEANING AND MAINTENANCE
Figure 26 - Orifice Holder On Outlet Burner Tube
Figure 27 - Pilot Inlet Air Hole
Burner Tube
Orifice Holder (May
Be Brass or Aluminum
Depending on Model)
Primary Air Inlet Holes (Shape of
Holes May Vary by Model)
Burner Tube
Pilot Assembly
Pilot Air
Inlet Hole
Ports/Slots
3. Blow air through the ports/slots and holes in the burner.
4. Check the orifice holder located at the end of the burner tube
again. Remove any large particles of dust, dirt, lint or pet hair
with a soft cloth or vacuum cleaner nozzle.
5. Blow air into the primary air holes on the orifice holder.
6. In case any large clumps of dust have now been pushed into the
burner repeat steps 3 and 4.
Clean the pilot assembly also. A yellow tip on the pilot flame indi-
cates dust and dirt in the pilot assembly. There is a small pilot air
inlet hole about two inches from where the pilot flame comes out of
the pilot assembly (see Figure 27). With the unit off, lightly blow air
through the air inlet hole. You may blow through a drinking straw if
compressed air is not available.
LOGS
• If you remove logs for cleaning, refer to Installing Logs, page 14,
to properly replace logs.
• Replace log(s) if broken or chipped (dime-sized or larger).
REPLACEMENT PARTS
WIRING DIAGRAM - FOR WHISPERING24FMN AND WHISPERING24FMP ONLY
Thermopile
See pages 22 and 23 for a complete replacement parts list. Use only
parts supplied from the manufacturer.
Normally, all parts should be ordered through your IHP distributor
or dealer. Parts will be shipped at prevailing prices at time of order.
When ordering repair parts, always give the following information:
1. The model number of the appliance.
2. The serial number of the appliance.
3. The part number.
4. The description of the part.
5. The quantity required.
6. The installation date of the appliance.
If you encounter any problems or have any questions concerning the
installation or application of this appliance, please contact your dealer.
IHP
1508 Elm Hill Pike, Suite 108
Nashville, TN 37210
Visit us at ComfortFlame.US.com

ComfortFlame.US.com900554-00 NC 19
SPECIFICATIONS
WHISPERING24FMP AND WHISPERING24FMP-M
• Rating: 25,000/36,000 Btu/hr
• Gas Type: Propane/LP
• Ignition: Piezo
• Manifold Pressure: 8.0" w.c.
• Inlet Supply Pressure (inches of water):
Maximum - 14" w.c., Minimum - 11" w.c.
SERVICE HINTS
When Gas Pressure Is Too Low
• pilot will not stay lit
• burner will have delayed ignition
• appliance will not produce specified heat
• propane/LP gas supply may be low (propane/LP only)
You may feel your gas pressure is too low. If so, contact your local
propane/LP or natural gas supplier.
WHISPERING24FMN AND WHISPERING24FMN-M
• Rating: 25,000/36,000 Btu/hr
• Gas Type: Natural
• Ignition: Piezo
• Manifold Pressure: 3.5" w.c.
• Inlet Supply Pressure (inches of water):
Maximum - 10.5" w.c., Minimum - 5" w.c.
TECHNICAL SERVICE
You may have further questions about installation, operation, or
troubleshooting. Please contact your IHP dealer for any questions
or concerns. When contacting your dealer please have your model
and serial numbers of your appliance ready. You can also visit our
web site at ComfortFlame.US.com.

ComfortFlame.US.com 900554-00 NC20
TROUBLESHOOTING
WARNING: Turn off heater and let cool before servicing. Only a qualified service person should service
and repair heater.
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.
• Leave the building immediately.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
- Installation and service must be performed by a qualified installer, service agency or the gas supplier.
CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/pilot unit.
NOTE: All troubleshooting items are listed in order of operation.
OBSERVED PROBLEM POSSIBLE CAUSE REMEDY
When Igniter button is pressed, there is no spark
at ODS/pilot
1. Igniter electrode not connected to Igniter cable
2. Igniter cable pinched or wet
3. Piezo Igniter nut is loose
4. Broken Igniter cable
5. Bad piezo Igniter
6. Igniter electrode positioned wrong
7. Igniter electrode broken
1. Reconnect Igniter cable
2. Free Igniter cable if pinched by any metal or
tubing. Keep Igniter cable dry
3. Tighten nut holding piezo Igniter to base panel of
log set. Nut is located behind base panel
4. Replace Igniter cable
5. Replace piezo Igniter
6. Replace pilot assembly
7. Replace pilot assembly
When Igniter button is pressed, there is spark at
ODS/pilot but no ignition
1. Gas supply turned off or equipment shutoff 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. Depleted gas supply (propane/LP only)
6. ODS/pilot is clogged
7. Gas regulator setting is not correct
1. Turn on gas supply or open equipment shutoff
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. Contact local propane/LP gas company
6. Clean ODS/pilot (see Cleaning and Maintenance,
pages 17 and 18) or replace ODS/pilot assem-
bly
7. Replace gas regulator
ODS/pilot lights but flame goes out when control
knob is released
1. Control knob not fully pressed in
2. Control knob not pressed in long enough
3. Safety interlock system has been triggered
4. Equipment shutoff valve not fully open
5. Pilot flame not touching thermocouple, which
allows thermocouple to cool, causing pilot
flame to go out. This problem could be caused
by one or both of the following:
A) Low gas pressure
B) Dirty or partially clogged ODS/pilot
6. Thermocouple connection loose at control valve
7. Thermocouple damaged
8. Control valve damaged
1. Press in control knob fully
2. After ODS/pilot lights, keep control knob
pressed in 30 seconds
3. Wait one minute for safety interlock system to
reset. Repeat ignition operation
4. Fully open equipment shutoff valve
5. A) Contact local natural or propane/LP gas
company
B) Clean ODS/pilot (see Cleaning and Mainte-
nance, pages 17 and 18) or replace ODS/pilot
assembly
6. Hand tighten until snug, then tighten 1/4 turn
more
7. Replace pilot assembly
8. Replace control valve
IMPORTANT: Operating appliance where impurities in air exist may create odors. Cleaning supplies, paint, paint remover, cigarette smoke,
cements and glues, new carpet or textiles, etc., create fumes. These fumes may mix with combustion air and create odors.