Desa Fvfm27Nr Pr Users Manual

FVFM27NRPR to the manual 1dd57a7d-ea87-3024-510d-76ce3f70e664

2015-02-04

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UNVENTED (VENT-FREE) GAS LOG HEATER
Also Design-Certified As A Vented Decorative Appliance

OWNER’S OPERATION AND INSTALLATION MANUAL
FLAME-MAX®
Multi-Sided
Log Design

VYM27NR/PR
FVFM27NR/PR
ON

HI
OFF

WARNING: If the information in this manual
is not followed exactly, a fire or explosion
may result causing property damage, personal injury, or loss of life.
— 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.
• 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.

O
PIL T

REMOTE

F
OF

Remote Control
Ready Model

Patent Pending

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 assistance 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 an
approved ventless firebox. It is design
certified for these installations in accordance with ANSI Z21.11.2. Exception: Do
not install this appliance in a factorybuilt fireplace that includes instructions
stating it has not been tested or should
not be used with unvented gas logs.

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 4 of this manual.
This appliance may be installed in an aftermarket,* 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.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

Save this manual for future reference.

FLAME-MAX®
UNVENTED GAS LOG HEATER
SAFETY
INFORMATION
WARNING ICON

G 001

Due to high temperatures, the
appliance should be located out
of traffic and away from furniture
and draperies.

WARNINGS

IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, operate, or service this heater. Improper use of this heater can cause
serious injury or death from burns,
fire, explosion, electrical shock,
and carbon monoxide poisoning.

Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects on the heater.
Heater base assembly becomes
very hot when running 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.

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.

Carefully supervise young children when they are in the room
with heater. When using the handheld remote accessory, keep selector switch in the OFF position
to prevent children from turning
on burners with remote.

Natural and Propane/LP Gas: Natural and

You must operate this heater with
a fireplace screen in place. Make
sure fireplace screen is closed
before running heater.

propane/LP gases are fuel gases. Fuel gases
are odorless. An odor-making agent are
added to fuel gases. The odor helps you
detect a fuel gas leak. However, the odor
added to fuel gas can fade. Fuel gas may be
present even though no odor exists.

Keep the appliance area clear and
free from combustible materials,
gasoline, and other flammable
vapors and liquids.

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.
WARNING: Any change to
this heater or its controls can be
dangerous.

2.
WARNING: Do not allow fans
to blow directly into the fireplace.
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.
For more information, visit www.desatech.com

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.
Do not place propane/LP supply tank(s)
inside any structure. Locate propane/LP
supply tank(s) outdoors.
To prevent performance problems, the
use of a propane/LP tank of less than
100 lbs. capacity is not recommended.
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
5. This heater shall not be installed in a
bedroom or bathroom unless installed
as a vented appliance (see Installing
Damper Clamp Accessory for Vented
Operation, page 10).
6. 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. Inspect chimney flue
for damage. If damaged, operate heater
with flue damper closed.
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. Also if fireplace opening has vents at the bottom, you must
open the vents before operating heater.
8. This log heater is designed to be smokeless. If logs ever appear to smoke, turn off
heater and call a qualified service person.
Note: During initial operation, slight
smoking could occur due to log curing and
heater burning manufacturing residues.
9. To prevent the creation of soot, follow
the instructions in Cleaning and Maintenance, page 17.
10. 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 or furniture.
11. This heater needs fresh, outside air ventilation to run properly. This heater has
an oxygen depletion sensing (ODS) pilot light safety system. The ODS shuts
down the heater if not enough fresh air
is available. See Air for Combustion
and Ventilation, pages 4 through 6. If
heater keeps shutting off, see Troubleshooting, pages 18 through 20.
12. Do not run heater
• where flammable liquids or vapors
are used or stored
• under dusty conditions

108382

OWNER’S MANUAL
SAFETY
INFORMATION
Continued
13. Do not use this heater to cook food or
burn paper or other objects.
14. 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.
15. Do not operate heater if any log is broken. Do not operate heater if a log is
chipped (dime-sized or larger).

16. Turn heater off and let cool before servicing, installing, or repairing. Make sure
the selector switch is in the OFF position. Only a qualified service person
should install, service, or repair heater.
17. Make sure the selector switch is in the
OFF position when you are away from
home for long periods of time.
18. This heater must not be connected to
any external electrical source.
19. Operating heater above elevations of
4,500 feet could cause pilot outage.
20. Provide adequate clearances around air
openings.

PRODUCT IDENTIFICATION

PRODUCT
FEATURES
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 realistic,
dancing yellow flames. This heater is designed for vent-free operation with flue damper
closed. It has been tested and approved to
ANSI Z21.11.2 standard for unvented heaters.
State and local codes in some areas prohibit
the use of vent-free heaters. This heater may
also be operated as a vented decorative product (ANSI Z21.60) by opening flue damper
(non-thermostat operation only).

APPLICATION
These multisided logs are designed to be
equally beautiful when viewed from any angle.

Log Set

They are designed specifically for use in
see-through, peninsula, and island fireboxes
with multiple openings. You may also install this log heater in a standard firebox.

SAFETY PILOT
This heater has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff system.
The ODS/pilot is a required feature for ventfree room heaters. The ODS/pilot shuts off
the heater if there is not enough fresh air.

Piezo
Ignitor
Optional
Remote
Control

WA
RM
ER

ON
OF
F

AU
TO

CO
OL
ER

TE
MP

Optional
Selector
Switch

PIEZO IGNITION SYSTEM

Flame
Adjustment
Knob
Control Knob

This heater has a piezo ignitor. This system
requires no matches, batteries, or other
sources to light heater.

Base Assembly

Figure 1 - Product Identification

LOCAL CODES

UNPACKING

Install and use heater 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.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269

Note: Where listed vented decorative logs
are required, thermostat operation is not
permitted.
108382

CAUTION: Do not remove the
metal data plates from the grate
assembly. The data plates contain
important product information.
1.

2.
3.

Remove logs and heater base assembly from carton. Note: Do not pick up
heater base assembly by the burner.
This could damage heater. Always
handle base assembly by grate.
Remove all protective packaging applied to logs and heater for shipment.
Check all items for any shipping damage. If damaged, promptly inform
dealer where you bought heater.
3

REMOTE CONTROL
ACCESSORIES
There are four optional remote controls that
can be purchased separately for this log heater:
• wall switch
• wall thermostat
• hand-held ON/OFF remote
• hand-held thermostat remote
See Accessories, page 24.

NOTE: The wall thermostat or hand-held
thermostat may not be used where vented
decorative listing is required.

For more information, visit www.desatech.com

FLAME-MAX®
UNVENTED GAS LOG HEATER
AIR FOR
COMBUSTION AND
VENTILATION
WARNING: This heater shall
not be installed in a confined space
or unusually tight construction
unless provisions are provided
for adequate combustion and ventilation air. Read the following instructions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
Today’s homes are built more energy efficient than ever. New materials, increased
insulation, and new construction methods
help reduce heat loss in homes. Home owners
weather strip and caulk around windows and
doors to keep the cold air out and the warm air
in. During heating months, home owners
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, fireplaces, clothes dryers, and
fuel burning appliances draw air from the
house to operate. You must provide adequate fresh air for these appliances. This
will insure proper venting of vented fuelburning appliances.

PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National
Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, 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 4 through 6 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.

Confined and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1/
NFPA 54 defines a confined space as a
space whose volume is less than 50 cubic
feet per 1,000 Btu per hour (4.8 m3 per 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 m3 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 the
unconfined space.
* Adjoining rooms are communicating only
if there are doorless passageways or ventilation grills between them.

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 (6x10-11 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, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and
gas lines, and at other openings.
If your home meets all of the three
criteria above, you must provide additional fresh air. See Ventilation Air
From Outdoors, page 6.
If your home does not meet all of the
three criteria above, proceed to Determining Fresh-Air Flow For Heater
Location, page 5.

For more information, visit www.desatech.com

108382

OWNER’S MANUAL
AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this work sheet to determine if you have a confined or unconfined 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 heater
_____________ Btu/Hr
Example:
Gas water heater*
_____________ Btu/Hr
Gas water heater
40,000 Btu/Hr
Gas furnace
_____________ Btu/Hr
Vent-free heater + 33,000 Btu/Hr
Vented gas heater
_____________ Btu/Hr
Total
= 73,000 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.
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 adjoining 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 6.
C. Install a lower Btu/Hr heater, 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.
WARNING: If the area in which the heater may be operated is smaller than that defined as an unconfined space
or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of
the methods described in the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3 or applicable local codes.
Continued
108382

For more information, visit www.desatech.com

FLAME-MAX®
UNVENTED GAS LOG HEATER
AIR FOR
COMBUSTION AND
VENTILATION

12"

Continued
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, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.

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 outdoors or spaces open
to the outdoors. These spaces include attics
and crawl spaces. Follow the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.

Ventilation
Grills
Into Adjoining
Room,
Option 1

Ventilation Grills
Into Adjoining Room,
Option 2

Or
Remove
Door into
Adjoining
Room,
Option
3

12"

Figure 2 - Ventilation Air from Inside Building

Outlet
Air

Ventilated
Attic

Outlet
Air

To Attic

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.

To
Crawl
Space
Inlet
Air
Inlet Air

Ventilated
Crawl Space

Figure 3 - Ventilation Air from Outdoors

For more information, visit www.desatech.com

108382

OWNER’S MANUAL
INSTALLATION
NOTICE: This heater is intended
for use as supplemental 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: A qualified service person must install heater.
Follow all local codes.
NOTICE: State or local codes may
only allow operation of this appliance in a vented configuration.
Check your state or local codes.
WARNING: 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, operate heater with flue
damper closed.
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 heatresistant sealant. Do not seal
chimney flue damper.

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 flammable
objects are less than 42 inches
from the front, top, or sides of
the heater
• in high traffic areas
• in windy or drafty areas
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 operating heater
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, pages 4 through 6.

CHECK GAS TYPE
Use only the correct type of gas (natural or
propane/LP). If your gas supply is not the
correct gas type, do not install heater. Call
dealer where you bought heater for proper
type heater.

INSTALLATION AND
CLEARANCES

MINIMUM FIREPLACE
CLEARANCE TO
COMBUSTIBLE MATERIALS
Log Size

Side Wall

Ceiling

27"

16"

42"

LOG SIZING REQUIREMENTS
Log
Size
27"

Minimum Firebox
Height
Depth
Width
17"

19"

32"

Carefully follow the instructions below. This
will ensure safe installation into a masonry,
UL127-listed manufactured fireplace, or
listed vent-free firebox.

Minimum Clearances For Side
Combustible Material, Side Wall,
and Ceiling
A. Clearances from the side of the fireplace cabinet to any combustible material and wall should follow diagram
in Figure 4.
Example: The face of a mantel, bookshelf, etc. is made of combustible 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
clearances to combustible materials.
B. Clearances from the top of the fireplace
opening to the ceiling should not be less
than 42 inches.

Example

(Vent-Free Operation Only)
WARNING: Maintain the minimum clearances. If you can, provide greater clearances from
floor, ceiling, and adjoining wall.

*
*Minimum 16 inches from Side Wall

Figure 4 - Minimum Clearance for Combustible to Wall

Continued
108382

For more information, visit www.desatech.com

FLAME-MAX®
UNVENTED GAS LOG HEATER
INSTALLATION
Continued
NOTICE: Manual control heaters
may be used as a vented product.
If so, you must always run heater
with chimney flue damper open.
If running heater with damper
open, noncombustible material
above fireplace opening is not
needed. Go to Installing Damper
Clamp Accessory for Vented Operation, page 10.

Minimum Noncombustible
Material 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.
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 inch thick. With
Noncombustible
Material Distance (A)

Requirements for
Safe Installation

12" or more

Noncombustible material OK.

Between 8" and 12"

Install fireplace hood accessory (GA6050, GA6052
or GA6053, 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.

If Not Using Mantel

Note: If using a mantel, proceed to If Using
Mantel. If not using a mantel, follow the
information below.

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 noncombustible material
is more than 12", you may need the hood
accessory to deflect heat away from your
mantel shelf. See Figure 5 and Figures 6 and
7, page 9, for minimum clearances.

You must have noncombustible material(s)
above both fireplace openings. Noncombustible materials (such as slate, marble,
tile, etc.) must be at least 1/2 inch 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. See Figure 5 at right for
minimum clearances.

Heat Resistant
Material
(A)

Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace

For more information, visit www.desatech.com

108382

OWNER’S MANUAL
INSTALLATION
Continued
MANTEL CLEARANCES
In addition to meeting noncombustible material clearances, you must also meet required clearances between fireplace openings and mantel shelf on each side of the
fireplace. If you do not meet the clearances
listed below, you will need a hood.

Underside of
Mantel Shelf

8"
6"
2 1/2"

All minimum
distances are
in inches
Minimum NonCombustible
Material

(A)

Determining Minimum Mantel
Clearance

12"

If you meet minimum clearance between
mantel shelf and top of fireplace opening, a
hood is not required (see Figure 6).

18"

20"

22"

24"

Top of Fireplace
Opening
Minimum NonCombustible
Material Height

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.

Mantel Shelf

10"

Distances to
Underside of
Mantel

Figure 6 - Minimum Mantel Clearances Without Using Hood
Mantel Shelf
12"

Underside of
Mantel Shelf

10"

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. Follow all minimum clearances
shown in this manual.

8"
6"
2 1/2"
Minimum NonCombustible
Material

All minimum
distances are
in inches
8"
Min.

12"

15"

18"

20"

Top of Fireplace
Opening

NOTICE: If your installation does
not meet 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

Hood(GA6050,
Hood
(GA6050,
GA6052)
GA6052
or GA6053)

Distances to
Underside of
Mantel

Figure 7 - Minimum Mantel Clearances When Using Hood

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).
108382

14"
Min.

Combustible
Material

Hearth
Hearth

5”
5"
Min.
Min.

Combustible
Combustible
Material
Material

Non-Combustible Material

Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
9

Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
Continued

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FLAME-MAX®
UNVENTED GAS LOG HEATER
INSTALLATION
Continued
Damper
Clamp

INSTALLING DAMPER
CLAMP ACCESSORY FOR
VENTED OPERATION

Damper

Damper
Clamp

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.
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 ventfree operation
3. You prefer vented operation
If reasons number 1 or 2 above 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 insure vented operation (see
Figure 10). The damper clamp will keep
damper open. Installation instructions are
included with clamp accessory.
See chart below for minimum permanent
flue opening you must provide. Attach
damper clamp so the minimum permanent
flue opening will be maintained at all times.
Chimney
Minimum Permanent
Height (ft.) Flue Opening (sq. ins.)
6' to 15'
39 sq. inches
15' to 30'
29 sq. inches
Area of Various Standard
Round Flues
Diameter (ins.)
5"
6"
7"
8"

Area (sq. ins.)
20 sq. inches
29 sq. inches
39 sq. inches
51 sq. inches

Damper

Masonry Fireplace

Damper

Manufactured Fireplace

Figure 10 - Attaching Damper Clamp

INSTALLING HEATER BASE
ASSEMBLY
CAUTION: Do not remove the
metal data plates attached to the
heater base assembly. The data
plates contain important warranty
and safety information.
WARNING: You must secure
this heater to fireplace floor. If
not, heater will move when you
adjust controls. Moving heater
may cause a gas leak.
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 insure adequate air flow and guard
against sooting. Raise fireplace
floor with noncombustible material. Make sure material is secure.
CAUTION: Do not pick up heater
base assembly by the burner. This
could damage heater. Only handle
base assembly by grates.

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IMPORTANT: Make sure the heater burner
is level. If heater is not level, heater will not
work properly.

Installation Items Needed
• hardware package (provided with heater)
• approved flexible gas hose (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
1. Apply pipe joint sealant lightly to male
threads of the fitting to be threaded into
gas control. Connect approved flexible
gas hose to gas control fitting in heater
(see Figure 11, page 11). IMPORTANT:
Hold gas fitting with wrench when connecting flexible gas hose.
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 13.
5. Center heater base and logs front-toback and side-to-side in fireplace.
6. Carefully remove logs without moving
heater base.
108382

OWNER’S MANUAL
INSTALLATION
Continued
7.

Mark screw locations through one hole
on each side of the mounting bracket
(see Figure 12). If installing in a brickbottom 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).
Flexible Gas
Hose (if allowed
by local codes)

Fitting

CONNECTING TO GAS
SUPPLY
WARNING: A qualified service
person must connect heater to
gas supply. Follow all local codes.
WARNING: Never connect
propane/LP heater directly to the
propane/LP supply. This heater
requires an external regulator (not
supplied). Install the external
regulator between the heater and
propane/LP supply.
WARNING: Never connect
natural gas heater to private (nonutility) gas wells. This gas is commonly known as wellhead gas.

Installation Items Needed

Figure 11 - Attaching Flexible Gas Hose
to Heater
Masonry Screw

ILO T

Mounting Flanges

Figure 12 - Attaching Base Assembly to
Fireplace Floor

Before installing heater, make sure you have
the items listed below.
• external regulator (for propane/LP units
only, 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 CSA design-certified equipment shutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Purchase the optional CSA design-certified
equipment shutoff valve from your dealer.
See Accessories, page 24.
For Propane/LP Gas: 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 inches 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 13. Pointing the vent down
protects it from freezing rain or sleet.

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.
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, page 12).

IMPORTANT: Install equipment shutoff
valve in an accessible location. The equipment shutoff valve is for turning on or
shutting off the gas to the appliance.
Check your building codes for any special
requirements for locating equipment shutoff
valve to fireplaces.
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.
WARNING: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Propane/LP
Supply
Tank
External
Regulator
Vent
Pointing
Down

Figure 13 - External Regulator With Vent
Pointing Down (propane/LP gas only)

Continued
108382

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FLAME-MAX®
UNVENTED GAS LOG HEATER
CHECKING GAS
CONNECTIONS

INSTALLATION
Continued
We recommend that you install sediment
trap in supply line as shown in Figure 14.
Locate sediment trap where it is within
reach for cleaning. 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.
CAUTION: Avoid damage to
control. Hold fitting with wrench
when connecting it to gas piping
and/or fittings.

Pressure Testing Gas Supply
Piping System

WARNING: Test all gas piping and connections for leaks
after installing or servicing. Correct all leaks at once.
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.
CAUTION: For propane/LP
gas, make sure external regulator has been installed between
propane/LP supply and heater.
See guidelines under Connecting to Gas Supply, page 11.

CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
Approved Flexible
Gas Hose (if
allowed by local
codes)

From Gas Meter for
natural gas (5" W.C.** to
10.5" W.C. Pressure)
From External Regulator
for propane/LP gas (11"
W.C.** to 14" W.C.
Pressure)

Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)

5.
6.

Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)

Gas Control
Tee
Joint

Sediment
Pipe
Trap
Nipple

3" Minimum

Cap

Figure 14 - Gas Connection

* Purchase the optional CSA design-certified equipment shutoff valve from your dealer. See
Accessories, page 24.
** Minimum inlet pressure for purpose of input adjustment.

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.
Cap off open end of gas pipe where
equipment shutoff valve was connected.
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.
Check all joints of gas supply piping
system. Apply a noncorrosive leak detection fluid to gas joints. Bubbles
forming show a leak.
Correct all leaks at once.
Reconnect heater and equipment
shutoff valve to gas supply. Check reconnected fittings for leaks.

Close equipment shutoff valve (see Figure 15).
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.
Check all joints from propane/LP supply tank to equipment shutoff valve (see
Figure 15). Apply a noncorrosive leak
detection fluid to gas joints. Bubbles
forming show a leak.
Correct all leaks at once.

Equipment
Shutoff
Valve

Open

ON
POSITION

OFF
POSITION

Closed

Figure 15 - Equipment Shutoff Valve

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108382

OWNER’S MANUAL

Propane/LP
Supply Tank

Bottom Log (#1)

Control Valve
Location
Figure 16 - Checking Gas Joints for
Natural Gas

Gas Meter

Equipment Shutoff Valve

Peg

It is very important to install the logs exactly
as instructed. Do not modify logs. Only use
logs supplied with heater.
1. Place bottom log (#1) on grate to fit as
illustrated in Figure 18. Make sure open
areas of log set line up with burner ports
(see Figure 19). Log will fit securely
on chassis. IMPORTANT: Make sure
log does not cover any burner ports.
2. Facing front of unit, place top log (#2)
onto the pegs in the center of the bottom log (see Figure 20).
3. Position log piece (#3) by aligning
holes on underside with remaining pegs
on bottom log (see Figure 21).
4. Place lava rock around base of heater.

Top Log
(#2)

Figure 20 - Installing Top Log (#2)
Log Piece (#3)

Peg

Equipment
Shutoff Valve

Burner
Port

5.
6.

Figure 19 - Installing Log set (Top View)

CAUTION: After installation
and periodically thereafter, check
to ensure that no flame comes in
contact with any log. With the
heater set to High, 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.

Open equipment shutoff valve (see Figure 15, page 12).
Open main gas valve located on or
near gas meter for natural gas or open
propane/LP supply tank valve.
Make sure control knob of heater is in
the OFF position.
Check all joints from equipment shutoff
valve to control valve (see Figure 16
or 17). Apply a noncorrosive leak detection fluid to gas joints. Bubbles
forming show a leak.
Correct all leaks at once.
Light heater (see Operating Heater,
pages 14 through 16). Check all other
internal joints for leaks.
Turn off heater (see To Turn Off Gas to
Appliance, page 15).

ILO T

WARNING: Failure to position
the parts in accordance with these
diagrams or failure to use only
parts specifically approved with
this heater may result in property
damage or personal injury.

Pressure Testing Heater Gas
Connections

Logs

Continued

Burner
Ports

INSTALLING LOGS

ILO T

INSTALLATION

Figure 21 - Installing Log Piece (#3)

ILO T

Chassis

Control Valve Location
Figure 17 - Checking Gas Joints for
Propane/LP Gas

Grate
Burner

Figure 18 - Installing Bottom Log (#1)
108382

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FLAME-MAX®
UNVENTED GAS LOG HEATER
LIGHTING
INSTRUCTIONS

OPERATING
HEATER
FOR YOUR SAFETY
READ BEFORE
LIGHTING

WARNING:
• 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. Also if
fireplace opening has vents at
the bottom, you must open the
vents before operating heater.
• You must operate this heater
with a fireplace screen in place.
Make sure fireplace screen is
closed before running heater.

WARNING: If you do not follow these instructions exactly, a
fire or explosion may result causing property damage, personal
injury or loss of life.
A. This appliance 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. Immediately
call a qualified service technician to
inspect the appliance and to replace
any part of the control system and
any gas control which has been under water.

WARNING: Burner will come
on automatically within one
minute when the selector switch
is in the ON position after the
pilot is lit.
4.

Press in and turn control knob clockwise
to the OFF position.
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, column 1. If you don’t
smell gas, go to the next step.
Press in and turn control knob counterclockwise
to the PILOT
position. Press in control knob for
five (5) seconds (see Figure 22).
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.
With control knob pressed in, press
and release ignitor button. This will
light pilot. The pilot is attached to the
front burner. If needed, keep pressing ignitor button until pilot lights.
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 on page 15.

NOTICE: During initial operation
of new heater, burning logs will
give off a paper-burning smell.
Open damper or window to vent
smell. This will only last a few hours.

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
High 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.

WARNING: Damper handle
will be hot if heater has been
running.
1.
2.
3.

STOP! Read the safety information,
column 1.
Make sure equipment shutoff valve
is fully open.
Set switch in OFF position.
Flame Adjustment Knob
Control Knob
LOT
PI

OFF

Ignitor Button

AUTO
OFF
ON

Selector Switch

Figure 22 - Control Knob and Ignitor Button Location (Shown as Supplied,
No Control Options)
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108382

OWNER’S MANUAL
TO TURN OFF GAS
TO APPLIANCE

OPERATING
HEATER

Shutting Off Heater

Continued

1.
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 qualified 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
burner. Note: AUTO is only functional when using GWMT1, or
GWMS2 optional accessories.
11. Set flame adjustment knob to any
level between HI and LO.

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.

Shutting Off Burner Only (pilot
stays lit)
You may shut off the burner and keep the
pilot lit by doing one of the following:
1. Turn control knob clockwise
to the PILOT position.
2. Use remote control manual OFF
button.
3. Set selector switch in the OFF position.

MANUAL LIGHTING
PROCEDURE

CAUTION: Do not try to adjust
heating levels by using the equipment shutoff valve.

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.

Pilot Burner

Ignitor
Electrode

Follow steps 1 through 6 under Lighting Instructions, page 14.
Depress control knob and light pilot
with match.
Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob. Now
follow steps 9 through 11, column 1.

OPTIONAL REMOTE
OPERATION

Pilot Burner

Ignitor
Electrode

NOTICE: You must light the pilot
before using the hand-held remote control unit. See Lighting
Instructions on page 14.
1.

After lighting, let pilot flame burn for
about one minute. Turn control knob
to ON position. Adjust flame adjustment knob anywhere between HI
and LO. Slide the selector switch to
the REMOTE position. NOTE: The
burner may light if hand-held remote
ON button was on when selector
switch was last turned off. You can
now turn the burner on and off with
the hand-held remote control unit.
IMPORTANT: Do not leave the selector switch in the REMOTE position when the pilot is not lit. This will
drain the battery.
IMPORTANT: Be sure to press the
ON/OFF buttons on the hand held
remote control unit for up to 3 seconds to assure proper operation.

GHRC Series Operation:
2a. Press the ON/OFF button to turn the
burner on and off. When turning
burner off, the pilot will remain lit.

GHRCTA Series Operation

Note: All remote control accessories must
be purchased separately (see Accessories,
page 24). Follow instructions included
with the remote control.

Thermostat Control Operation
Figure 23 - Natural Gas Pilot

For wall thermostat operation, follow instructions supplied with thermostat accessory GWMT1. For wall switch operation follow instructions supplied with
GWMS2.

(Optional GHRCTA Series Only) The
thermostat control setting on the remote
control unit can be set to any comfort
level between WARMER and COOLER.
The burner will turn on and off automatically to maintain the comfort level you
select. The ideal comfort setting will vary
by household depending upon the amount
of space to be heated, the output of the
central heating system, etc.

2b. Press the AUTO/ON/OFF button on
the hand-held remote control (see
Figure 26, page 16). The lights to the
left of the button will show AUTO,
ON, or OFF.
• In the ON mode, the burners will
ignite. The heater is in manual
mode when ON is lit.
• In the AUTO mode, the thermostat
in the hand-held remote unit controls the room temperature. To increase the room temperature, press
the top arrow of the TEMP button.
To lower the room temperature,
press the bottom arrow of the
TEMP button. At higher settings
the heater will run longer.

Figure 24 - Propane/LP Gas Pilot
Continued
108382

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FLAME-MAX®
UNVENTED GAS LOG HEATER
IMPORTANT: The hand-held remote control unit must be near the
heater. Do not keep the hand-held
remote control unit too close to the
heater. The thermostat on the handheld remote control unit will heat up
too quickly and turn the heater off.
To turn the burner off, press the
AUTO/ON/OFF button until OFF
lights. The pilot will remain lit.
IMPORTANT: To turn the pilot off,
manually turn the control knob on the
heater to the OFF position.

OPERATING
HEATER
Continued
IMPORTANT: This remote control
has been specially engineered to
take an air temperature sample every 5.5 minutes in the AUTO mode.
It will not respond immediately to
the temperature setting being
turned up or down.

Control Knob in
On Position

Flame Adjustment Knob

PILO

Check pilot flame pattern and burner flame
patterns often.

PILOT FLAME PATTERN
Figure 27 shows a correct pilot flame pattern.
Figure 28 shows an incorrect pilot flame
pattern. The incorrect pilot flame is not touching the thermocouple. When the thermocouple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 28
• turn heater off (see To Turn Off Gas to
Appliance, page 15)
• see Troubleshooting, pages 18 through 20

ON
OFF
REMOTE

INSPECTING
BURNERS

Pilot Burner

Thermocouple

Selector Switch in Remote Position
(Optional Remote Control)

Figure 25 - Setting the Selector Switch, Control Knob, and Flame Adjustment Knob for
Remote Operation

Shows Temperature Setting

Increases Room
Temperature in
AUTO Mode

Figure 27 - Correct Pilot Flame Pattern
(Propane/LP Pilot Shown)
Pilot Burner
Thermocouple

The Log Heater will
Automatically Cycle
between Pilot and the
Heat Setting that has
been Selected

Decreases Room
Temperature in
AUTO Mode
Turns Burners
On or Off and
Allows You to
Choose the Auto
Setting

Figure 28 - Incorrect Pilot Flame Pattern
(Propane/LP Pilot Shown)

Figure 26 - Thermostat Hand-Held Remote Control Unit Selections (GHRCTA only)

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108382

OWNER’S MANUAL
INSPECTING
BURNERS

CLEANING AND
MAINTENANCE

Continued
BURNER FLAME PATTERN
Figure 29 shows a correct burner flame pattern. Figure 30 shows an incorrect burner
flame pattern. If burner flame pattern is
incorrect,
• turn heater off (see To Turn Off Gas to
Appliance, page 15)
• see Troubleshooting, pages 18 through 20

WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burner, and circulating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
heater inspected yearly by a qualified service person. Heater may
need more frequent cleaning due
to excessive lint from carpeting,
bedding material, pet hair, etc.

Figure 29 - Correct Flame Pattern

CLEANING BURNER INJECTOR HOLDER AND PILOT
AIR INLET HOLE

Figure 30 - Incorrect Flame Pattern

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.

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.

108382

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. You can use a vacuum cleaner in the
blow position. 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 injector holder for dust
and dirt (see Figure 31).
3. Blow air through the ports/slots and
holes in the burner.
4. Check the injector 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 injector holder.
17

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 indicates 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 32). 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.
Injector
Burner
Tube

Holder
(May Be
Brass or
Aluminum
Depending
on Model)

Primary Air Inlet
Holes (Shape of
Holes May Vary
by Model)
Figure 31 - Injector Holder On Outlet
Burner Tube
Ports/Slots
Burner
Tube
Pilot
Assembly
Pilot Air
Inlet Hole

Figure 32 - Pilot Inlet Air Hole

LOGS
• If you remove logs for cleaning, refer to
Installing Logs, page 13, to properly replace logs.
• Replace log(s) if broken or chipped
(dime-sized or larger).

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FLAME-MAX®
UNVENTED GAS LOG HEATER
TROUBLESHOOTING

WARNING: Turn off heater
and let cool before servicing.
Only a qualified service person
should service and repair heater.

Note: For additional help, visit DESA
International’s technical service web site
at www.desatech.com.

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 ignitor button is pressed, there is no
spark at ODS/pilot

1. Ignitor electrode not connected to ignitor cable
2. Ignitor cable pinched or wet

1. Reconnect ignitor cable

3. Piezo ignitor nut is loose
4.
5.
6.
7.
When ignitor button is pressed, there is
spark at ODS/pilot but no ignition

Broken ignitor cable
Bad piezo ignitor
Ignitor electrode broken
Ignitor electrode positioned wrong

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 gas)
6. ODS/pilot is clogged
7. Gas regulator setting is not correct

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. Equipment shutoff valve not fully open
4. 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
5. Thermocouple connection loose at control valve
6. Thermocouple damaged
7. Control valve damaged

2. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
3. Tighten nut holding piezo ignitor to base
panel of log set. Nut is located behind
base panel.
4. Replace ignitor cable
5. Replace piezo ignitor
6. Replace piezo ignitor
7. Replace piezo ignitor
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, page 17) or replace ODS/
pilot assembly
7. Replace gas control
1. Press in control knob fully
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Fully open equipment shutoff valve
4. A) Contact local natural or propane/LP
gas company
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 17) or replace ODS/
pilot assembly
5. Hand tighten until snug, then tighten
1/4 turn more
6. Replace thermocouple
7. Replace control valve

www.desatech.com
For more information, visit www.desatech.com

108382

OWNER’S MANUAL
TROUBLESHOOTING
Continued
OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

Burner does not light after ODS/pilot is lit

1. Burner orifice clogged

1. Clean burner (see Cleaning and Maintenance, page 17) or replace burner orifice
2. Contact local natural or propane/LP gas
company
3. Replace burner orifice
4. Reconnect leads (see Wiring Diagram,
page 21)
5. Replace battery in transmitter and receiver

2. Inlet gas pressure is too low
3. Burner orifice diameter is too small
4. Thermopile leads disconnected or improperly connected
5. Burners will not come on in remote
position
Delayed ignition burner

1. Manifold pressure is too low
2. Burner orifice clogged

1. Contact local natural or propane/LP gas
company
2. Clean burner (see Cleaning and Maintenance, page 17) or replace burner orifice

Burner backfiring during combustion

1. Burner orifice is clogged or damaged

1. Clean burner (see Cleaning and Maintenance, page 17) or replace burner orifice
2. Replace damaged burner
3. Replace gas control

2. Damaged burner
3. Gas regulator defective
Slight smoke or odor during initial operation

1. Not enough air
2. Gas regulator defective
3. Residues from manufacturing processes
and logs curing

1. Check burner for dirt and debris. If
found, clean burner (see Cleaning and
Maintenance, page 17)
2. Replace gas control
3. Problem will stop after a few hours of
operation

Moisture/condensation noticed on windows

1. Not enough combustion/ventilation air

1. Refer to Air for Combustion and Ventilation requirements (page 4)

Heater produces a whistling noise when
burner is lit

1. Turning control knob to HI position
when burner is cold
2. Air in gas line

1. Turn control knob to LO position and
let warm up for a minute
2. Operate burner until air is removed from
line. Have gas line checked by local
natural or propane/LP gas company
3. Observe minimum installation clearances (see pages 7 through 9)
4. Clean burner (see Cleaning and Maintenance, page 17) or replace burner orifice

3. Air passageways on heater blocked
4. Dirty or partially clogged burner orifice
White powder residue forming within burner
box or on adjacent walls or furniture

1. When heated, vapors from furniture polish, wax, carpet cleaners, etc. may turn
into white powder residue

1. Turn heater off when using furniture
polish, wax, carpet cleaners, or similar
products

Remote does not function

1. Battery is not installed. Battery power
is low

1. Replace 9-volt batteries in receiver and
remote control

www.desatech.com
108382

Continued

For more information, visit www.desatech.com

FLAME-MAX®
UNVENTED GAS LOG HEATER
TROUBLESHOOTING
Continued
WARNING: 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.

IMPORTANT: Operating heater 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. These odors
will disappear over time.

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

Heater produces a clicking/ticking noise
just after burner is lit or shut off

1. Metal expanding while heating or contracting while cooling

1. This is common with most heaters. If
noise is excessive, contact qualified service person

Heater produces unwanted odors

1. Heater burning vapors from paint, hair
spray, glues, cleaners, chemicals, new
carpet, etc. (See IMPORTANT statement above)
2. Gas leak. See Warning statement at
top of page

1. Open window and ventilate room. Stop
using odor causing products while heater
is running

Heater shuts off in use (ODS operates)

1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged

1. Open window and/or door for ventilation
2. Contact local natural or propane/LP gas
company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 17)

Gas odor even when control knob is in OFF
position

1. Gas leak. See Warning statement at
top of page
2. Control valve defective

1. Locate and correct all leaks (see Checking Gas Connections, page 12)
2. Replace control valve

Gas odor during combustion

1. Foreign matter between control valve
and burner
2. Gas leak. See Warning statement at
top of page

1. Take apart gas tubing and remove foreign matter
2. Locate and correct all leaks (see Checking Gas Connections, page 12)

2. Locate and correct all leaks (see Checking Gas Connections, page 12)

www.desatech.com
For more information, visit www.desatech.com

108382

OWNER’S MANUAL
WIRING DIAGRAM

REPLACEMENT
PARTS

Note: For proper operation of optional accessories, the wires from the switch to the
control must be connected exactly as shown.

Note: Use only original replacement parts.
This will protect your warranty coverage for
parts replaced under warranty.

PARTS UNDER WARRANTY
Contact authorized dealers of this product. If
they can’t supply original replacement part(s),
call DESA International’s Technical Service
Department at 1-866-672-6040. When calling DESA International, have ready
• your name and address
• model and serial numbers of your heater
• how heater was malfunctioning
• type of gas used (propane/LP or natural gas)
• purchase date

AU
TO
OF

Thermopile

Usually, we will ask you to return the part to
the factory.

SPECIFICATIONS
Btu (Variable)
Type Gas
Ignition
Pressure Manifold
Inlet Gas Pressure (in. of water)
Maximum
Minimum*
Shipping Weight
* For input adjustment

Natural Gas

Propane/LP

20,000/39,000
Natural Gas Only
Piezo
3.5" W.C.

20,000/39,000
Propane/LP Only
Piezo
8.0" W.C.

10.5"
5"
32 lbs.

14"
11"
32 lbs.

SERVICE HINTS
When Gas Pressure Is Too Low
•
•
•
•

pilot will not stay lit
burners will have delayed ignition
heater will not produce specified heat
propane/LP gas supply may be low

You may feel your gas pressure is too low. If
so, contact your local natural or propane/LP
gas supplier.

108382

PARTS NOT UNDER
WARRANTY
Contact authorized dealers of this product. If
they can’t supply original replacement part(s),
call DESA International at 1-866-672-6040
for referral information. When calling DESA
International, have ready
• model number of your heater
• the replacement part number

TECHNICAL
SERVICE
You may have further questions about installation, operation, or troubleshooting. If
so, contact DESA International’s Technical
Service Department at 1-866-672-6040.
You can also visit DESA International’s
technical services web site at
www.desatech.com.

For more information, visit www.desatech.com

FLAME-MAX®
UNVENTED GAS LOG HEATER
ILLUSTRATED
PARTS
BREAKDOWN
VYM27NR
FVFM27NR
VYM27PR
FVFM27PR

NOTE: Part numbers 22
and 23 are for natural gas
model only.

9
8

11
23

12
12
20

13
L

ILOT

16
14
15

21
19

12
I

ILO T

For more information, visit www.desatech.com

18
22

108382

OWNER’S MANUAL
PARTS LIST
VYM27NR
FVFM27NR
VYM27PR
FVFM27PR

This list contains replaceable parts used in your heater. When ordering parts, follow the
instructions listed under Replacement Parts on page 21 of this manual.

KEY
NO.

PART NUMBER
VYM27NR
VYM27PR
FVFM27NR
FVFM27PR

DESCRIPTION

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

104676-01
103779-01
098249-01
104592-01
098264-02
102843-01
099056-16
104591-01
100609-01
103781-01
104611-01
098304-01
104590-01CK
098271-06
102445-01
103587-02CK
103784-02
103784-01
M12461-26
103284-02
099998-01
099918-02
099387-15

Log, Multi-Sided
ODS Pilot
ODS Nut
Burner Outlet Tube
Male Connector
Burner Clip
Burner Orifice Injector
Burner
Pilot Tube (Regulator to Pilot)
Gas Control Valve
Lower Bracket
Screw, #8 x .38
Painted Base Assy
Ignitor Cable
Piezo Ignitor
Plate, Switch
Flame Adjustment Knob
Off-Pilot-On Knob
Screw, Hex Slt Wsr 10-32 x .38
Wiring Harness
Switch
Pilot Regulator
Pilot Tube (Valve to Regulator)

104676-01
103778-01
098249-01
104592-02
098264-02
102843-01
099056-17
104591-01
099387-13
103781-02
104611-01
098304-01
104590-01CK
098271-06
102445-01
103587-02CK
103784-02
103784-01
M12461-26
103284-02
099998-01
___
___

QTY.
1
1
2
1
1
1
1
1
1
1
1
7
1
1
1
1
1
1
4
1
1
1
1

PARTS AVAILABLE — NOT SHOWN
100563-01
103877-01
100565-01
100639-01
101137-02
GA6060

108382

100563-01
103877-01
100565-01
100693-01
101137-02
GA6060

Warning Plate
Lighting Instructions Plate
Warning Plate Fastener
Caution Decal
Hardware Kit
Lava Rock

1
1
1
1
1
2

For more information, visit www.desatech.com

FLAME-MAX®
UNVENTED GAS LOG HEATER
ACCESSORIES

WA
RM
ER

AU
TO
ON
OF
F

Purchase these heater accessories from
your local dealer. If they can not supply
these accessories, call DESA International
at 1-800-458-6860 for referral information. You can also write to the address
listed on the back page of this manual.

CO
OL
ER

TE
MP

(Not Shown)
For all models. Order when additional rock
is desired. (3 lb. bag)

WALL-MOUNT THERMOSTAT
SWITCH - GWMT1
RECEIVER AND HAND-HELD
THERMOSTAT REMOTE
CONTROL KIT - GHRCTA
SERIES

EQUIPMENT SHUTOFF
VALVE - GA5010

LAVA ROCK - GA6060

For all models. Allows the gas log heater to
be operated in a manually or thermostatically-controlled mode. You can turn the gas
log heater on and off without ever leaving
the comfort of your easy chair.

(Not Shown)
For all models. The desired comfort setting
can be selected on the wall thermostat and
the log heater will automatically cycle from
pilot to the heat setting selected.

WALL-MOUNT ON/OFF
SWITCH - GWMS2
(Not Shown)
For all models. Allows the gas log heater to
be turned on and off with a wall switch.

DAMPER CLAMP - GA6080
(Not Shown)

For all models. Equipment shutoff valve with
1/8" NPT tap. Fits 1/2" NPT pipe.

Permanently opens chimney flue damper
for vented operation. Can be used only with
non-thermostat accessories.

CLEANING KIT - GCK

FIREPLACE HOOD

RECEIVER AND HANDHELD REMOTE CONTROL
KIT - GHRC

Black - GA6050
Brass - GA6052
Antique Brass - GA6053

For all models. Allows the gas log heater
to be turned on and off by using a handheld remote control.

Your vent-free gas appliance requires regular cleaning and maintenance to prevent
performance problems. This kit gives you
the tools and instructions to make it easy to
clean all critical areas of your appliance.

INFORMATION VIDEO 108917-01

For all models. Helps deflect heat away
from mantel or wall above fireplace. Fits
openings 28" to 48" wide.

For more information, visit www.desatech.com

(Not Shown)

For all models. A care and maintenance
video is available by calling 1-866-672-6040.

108382

OWNER'S REGISTRATION FORM
In order to provide better customer service for this and future purchases, we recommend that you register your product with us.
You can register online at www.desatech.com. If access to our website is not available to you, please complete this Owner’s
Registration Form and mail to the address on the back of this owner’s manual. Please provide the following product information:

OWNER’S MANUAL

Brand:

(Comfort Glow, Vanguard, etc.)

Model:

(EFP33PR, VTGH33NR, etc.)

Date Purchased:

Note: Keep receipt for warranty verification.

Serial Number:

7 or 9 digit number located on product or identification tag.

First Name:

Last Name:

Address:
City:
Home Phone:

State:
(

)

Zip:

Country:

E-Mail:
Please answer the following questions to register your product with DESA International:
1.

Where will the product be used?

If you bought this product yourself, did you plan to purchase this type of product before going into the store?

Who selected the product? ❍ Male ❍ Female ❍ Both

What is the population of your area? ❍ Under 10,000

What is your primary source of heat?

❍ Living/Family Room

❍ 100,000 to 250,000

❍ Office/Warehouse

❍ Utility Shed/Outbuilding

❍ 10,000 to 25,000

❍ Bedroom

❍ 25,000 to 50,000

❍ Bathroom

❍ Other

❍ Yes ❍ No

❍ 50,000 to 100,000

❍ Over 250,000
❍ Propane (LP Gas)

❍ Fuel Oil

How was the product installed? ❍ Professional Installer

Cost of product excluding sales tax? $___________________

Cost to install product? $____________________

Type of store where product was purchased? ❍ Hardware
❍ Fireplace or Hearth Shop

❍ Farm Store

❍ Self

❍ Emergency Back-Up Heat

❍ Heater was on Sale

11. How did you learn about this product brand? ❍ Advertising
❍ 20 - 29

❍ Natural Gas

❍ Electric

❍ Other

❍ Propane Dealer

❍ Natural Gas/Utility Co.

❍ 30 - 39

❍ Relative or Friend

❍ Home Center/Builder’s Supply

❍ 40 - 49

❍ 50 - 59

❍ D.I.Y. Home Project

❍ Construction Project

❍ Store Display

❍ Completed High School

14. Buyer’s total annual household income: ❍ Under $15,000
❍ $75,000 to $99,999

❍ Replace Older Model

❍ Energy Savings/High Efficiency

12. Level of Education of Purchaser: ❍ Some High School
13. Age of Purchaser: ❍ Under 20

❍ Wood

❍ Other

10. What motivated you to buy this product? ❍ Sudden Cold Weather

❍ $50,000 to $74,999

❍ Garage

❍ Other

❍ Other ________________________

❍ Completed College

❍ Completed Graduate School

❍ 60 or Over

❍ $15,000 to $19,999

❍ $20,000 to $34,999

❍ $35,000 to $49,999

❍ $100,000 and Over

15. Store where product was purchased:
Name: ______________________________________
City: _______________________ State: __________
16. In choosing this product, how important were the following:

108382

Availability
Price
Brand Name
Overall Quality
Heat Output
Made in USA
Warranty
Local Service
Value for Price
Prior Brand Experience
Controls Location
Thermostat, Remote, or Manual Operation
Ease of Operation
Special Features
Salesperson’s Recommendation
Friend/Relative’s Recommendation
Portability
Quiet Operation

Not Important

Somewhat Important

❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍

Very Important
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
❍
For more
❍ information, visit www.desatech.com

FLAME-MAX®
UNVENTED GAS LOG HEATER

Postage
Required

2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004

For more information, visit www.desatech.com

108382

OWNER’S MANUAL
NOTES
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_______________________________________________________________________________________________
_______________________________________________________________________________________________
108382

For more information, visit www.desatech.com

WARRANTY INFORMATION
KEEP THIS WARRANTY
Model
Serial No.
Date Purchased

Always specify model and serial numbers when communicating with the factory.
We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written warranty.
We make no other warranty, expressed or implied.

LIMITED WARRANTY
VENT-FREE GAS LOG HEATERS
DESA International warrants this product to be free from defects in materials and components for four (4) years from the date of first
purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions.
To make a claim under this warranty the Bill of Sale or cancelled check must be presented.
This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required to restore this heater to
proper operating condition and an allowance for labor when provided by a DESA Authorized Service Center. Warranty part(s) MUST
be obtained through authorized dealers of this product and/or DESA International who will provide original factory replacement parts.
Failure to use original factory replacement parts voids this warranty. The heater MUST be installed by a qualified installer in accordance
with all local codes and instructions furnished with the unit.
This warranty does not apply to parts that are not in original condition because of normal wear and tear, or parts that fail or become damaged
as a result of misuse, accidents, lack of proper maintenance or defects caused by improper installation. Travel, diagnostic cost, labor,
transportation and any and all such other costs related to repairing a defective heater will be the responsibility of the owner.
TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE PRODUCT;
THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE TO FOUR (4) YEARS ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE; AND
DESA INTERNATIONAL’S LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA
INTERNATIONAL SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.
Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or consequential
damages, so the above limitation on implied warranties, or exclusion or limitation on damages may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights that vary from state to state.
For information about this warranty write:
TM

2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com

108382 01

NOT A UPC

108382-01
Rev. B
02/02

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Create Date                     : 2002:02:20 07:52:29
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Modify Date                     : 2002:02:20 09:00:52-06:00
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