Desa FLAME-MAX FVFM27PR Quick start guide
Save this manual for future reference.
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WARNING: If the information in this manual is not fol-
— WHAT TO DO IF YOU SMELL GAS
• Do not touch any electrical switch; do not use any
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UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
FLAME-MAX®
VYM27NR, VYM27PR, FVFM27NR AND FVFM27PR
Remote Control Ready Models
www.desatech.com 108382-01G2
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Air for Combustion and Ventilation
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State of Massachusetts: The installation must be made by a licensed plumber or gas tter in the
Commonwealth of Massachusetts.
Sellers of unvented propane or natural gas-red 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 bathroom installation in the Common-
wealth of Massachusetts.
TAbLE OF CONTENTS
Safety Information ............................................... 3
Product Identication........................................... 4
Local Codes......................................................... 5
Unpacking............................................................ 5
Product Features................................................. 5
Remote Rontrol Rccessories............................... 5
Air for Combustion and Ventilation ...................... 5
Installation ........................................................... 8
Operating Heater............................................... 16
Inspecting Burners ............................................ 19
Cleaning and Maintenance................................ 20
Wiring Diagram.................................................. 21
Specications .................................................... 21
Replacement Parts............................................ 21
Service Hints ..................................................... 21
Technical Services............................................. 21
Troubleshooting................................................. 22
Accessories ....................................................... 25
Illustrated Parts Breakdown and Parts List........ 26
Warranty Information ...........................Back Cover
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108382-01G 3
SAFETY INFORMATION
of California to cause cancer or
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Early signs of carbon
monoxide poisoning resemble the u, with head-
aches, 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 inuence
of alcohol, and those at high altitudes.
Natural and
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.
Make certain you read and understand all warn-
ings. Keep this manual for reference. It is your
guide to safe and proper operation of this heater.
this heater or its controls can
WARNING: Do not use a
insert, or other accessory not
WARNING: Do not allow fans
will remain hot for a time after
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dren when they are in the room
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SAFETY INFORMATION
Continued
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) in-
side any structure. Locate propane/LP supply
tank(s) outdoors (propane/LP units only).
3. To prevent performance problems, the use
of a propane/LP tank of less than 100 lbs.
capacity is not recommended (propane/LP
units only).
4. 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 re department
5. This heater shall not be installed in a bedroom
or bathroom unless installed as a vented appli-
ance (see Installing Damper Clamp Accessory
for Vented Operation, page 11).
6. Before installing in a solid fuel burning
replace, the chimney ue and rebox must
be cleaned of soot, creosote, ashes and loose
paint by a qualied chimney cleaner. Creosote
will ignite if highly heated. A dirty chimney
ue may create and distribute soot within
the house. Inspect chimney ue for damage.
If damaged, repair ue and rebox before
operating heater.
7. Do not burn solid-fuel in a masonry or UL127
factory-built replace in which a vent-free
room heater is installed.
8. If replace has glass doors, never operate this
heater with glass doors closed. If you operate
heater with doors closed, heat buildup inside
replace will cause glass to burst. Make sure
there are no obstructions across openings of
replace.
9. This log heater is designed to be smokeless. If
logs ever appear to smoke, turn off heater and
call a qualied service person. Note: During
initial operation, slight smoking could occur
due to log curing and heater burning manu-
facturing residues.
10.
To prevent the creation of soot, follow the instruc-
tions in Cleaning and Maintenance, page 20.
11. 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.
12. 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, page 5. If heater keeps shutting off,
see Troubleshooting, page 22.
13. Do not run heater
• where ammable liquids or vapors are used
or stored
• under dusty conditions
14. Do not use this heater to cook food or burn
paper or other objects.
15. Do not use heater if any part has been exposed
to or under water. Immediately call a qualied
service technician to inspect the room heater
and to replace any part of the control system and
any gas control which has been under water.
16. Do not operate heater if any log is broken. Do
not operate heater if a log is chipped (dime-
sized or larger).
17.
Turn heater off and let cool before servicing, install-
ing, or repairing. Make sure the selector switch is in
the OFF position. Only a qualied service person
should install, service, or repair heater.
18. Make sure the selector switch is in the OFF
position when you are away from home for
long periods of time.
19. This heater must not be connected to any
external electrical source.
20. Operating heater above elevations of 4,500
feet could cause pilot outage.
21.
Provide adequate clearances around air
openings.
PRODUCT IDENTIFICATION
Figure 1 - Product Identication
Control
Knob
Piezo
Ignitor Log Set
Base
Assembly
Optional
Remote
Control
Flame
Adjustment
Knob
Optional
Selector
Switch
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108382-01G 5
LOCAL CODES
Install and use heater with care. Follow all local
codes. In the absence of local codes, use the lat-
est 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.
UNPACkING
CAUTION: Do not remove the
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1. Remove logs and heater base assembly from
carton. Note: Do not pick up heater base assem-
bly by the burner. This could damage heater.
Always handle base assembly by grate.
2. Remove all protective packaging applied to
logs and heater for shipment.
3. Check all items for any shipping damage. If
damaged, promptly inform dealer where you
bought heater.
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 ames. This heater is designed for vent-free
operation with ue 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 ue damper
(non-thermostat operation only).
APPLICATION
These multisided logs are designed to be equally
beautiful when viewed from any angle. They
are designed specically for use in see-through,
peninsula, and island fireboxes with multiple
openings. You may also install this log heater in
a standard rebox.
SAFETY PILOT
This heater has a pilot with an Oxygen Deple-
tion 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 ignitor. This system re-
quires no matches, batteries, or other sources to
light heater.
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 25.
Note: The wall thermostat or hand-held thermostat
may not be used where vented decorative listing
is required.
AIR FOR COMbUSTION
AND VENTILATION
WARNING: This heater shall
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Today’s homes are built more energy efcient 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 ef-
cient, your home needs to breathe. Fresh air must
enter your home. All fuel-burning appliances need
fresh air for proper combustion and ventilation.
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Exhaust fans, replaces, 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 fuel-burning appliances.
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 fol-
lowing ventilation classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space
The information on pages 5 through 7 will help you
classify your space and provide adequate ventilation.
The air that leaks around doors and windows may
provide enough fresh air for combustion and ven-
tilation. However, in buildings of unusually tight
construction, you must provide additional fresh air.
as construction where:
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and
and
If your home meets all of the three criteria
Ventilation Air From Outdoors,
If your home does not meet all of the three
Determining
Fresh-Air Flow For Heater Location
The National Fuel Gas Code, ANSI Z223.1/NFPA
54 denes a conned 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 unconned 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 com-
municating directly with the space in which the
appliances are installed*, through openings not
furnished with doors, are considered a part of the
unconned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation grills
between them.
DETERMINING FRESH-AIR FLOW
FOR HEATER LOCATION
Use this work sheet to determine if you have a
conned or unconned space.
Includes the room in which you will install
heater plus any adjoining rooms with doorless pas-
sageways 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
Gas water heater* _________ Btu/Hr
Gas furnace _________ Btu/Hr
Vented gas heater _________ Btu/Hr
Gas replace logs _________ Btu/Hr
Other gas appliances* + _________ Btu/Hr
Total = _________ Btu/Hr
* Do not include direct-vent gas appliances. Di-
rect-vent draws combustion air from the outdoors
and vents to the outdoors.
AIR FOR COMbUSTION
AND VENTILATION
Continued
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108382-01G 7
Outlet
Air
Ventilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
AIR FOR COMbUSTION
AND VENTILATION
Continued
Example:
Gas water heater* ____________Btu/Hr
Vent-free heater + __________Btu/Hr
Total = __________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 this example is a conned space because
the actual Btu/Hr used is more than the maximum
Btu/Hr the space can support. You must provide ad-
ditional 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.
B. Vent room directly to the outdoors. See Ventila-
tion Air From Outdoors.
C. Install a lower Btu/Hr heater, if lower Btu/Hr size
makes room unconned.
If the actual Btu/Hr used is less than the maximum
Btu/Hr the space can support, the space is an un-
conned space. You will need no additional fresh
air ventilation.
WARNING: If the area in
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in the National Fuel Gas Code,
ANSI Z223.1/NFPA 54, Section
This fresh air would come from an adjoining un-
conned space. When ventilating to an adjoining
unconned space, you must provide two perma-
nent openings: one within 12" of the ceiling and
40,000
33,000
73,000
one within 12" of the oor 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.
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"
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 oor. 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.
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.
Figure 3 - Ventilation Air from Outdoors
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INSTALLATION
NOTICE: This heater is intended
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NOTICE:Stateorlocalcodesmay
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WARNING: Seal any fresh
air vents or ash clean-out doors
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WARNING: Never install the
heater
unless installed as a vented
• in a recreational vehicle
• wherecurtains,furniture,cloth-
• in windy or drafty areas
CAUTION: This heater cre-
currents move heat to wall sur-
heater next to vinyl or cloth wall
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the air exist, may discolor walls
IMPORTANT: Vent-free heaters add moisture to
the air. Although this is benecial, 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.
CHECK GAS TYPE
Use only the correct type of gas (natural or pro-
pane/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.
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INSTALLATION AND CLEARANCES
WARNING: Maintain the
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108382-01G 9
MINIMUM FIREPLACE CLEARANCE
Side Wall
16" 42"
Size
Width
27" 17" 19" 32"
Carefully follow the instructions below. This will
ensure safe installation into a masonry, UL127-listed
manufactured replace, or listed vent-free rebox.
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 combus-
tible material must be 4" from the side of the
replace 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 replace opening
to the ceiling should not be less than 42".
NOTICE: Manual control heaters
If so, you must always run heater
Installing Damper
Clamp Accessory for Vented
Operation
INSTALLATION
Continued
Figure 4 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
*
Example
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
MATERIAL CLEARANCES
Note: If using a mantel, proceed to If Using
Mantel, page 10 If not using a mantel, follow the
information below.
You must have noncombustible material(s) above
both replace openings. Noncombustible materi-
als (such as slate, marble, tile, etc.) must be at
least 1/2" thick. With sheet metal, you must have
noncombustible material behind it. Noncombus-
tible material must extend at least 8" up (for all
models). If noncombustible material is less than
12", you must install the replace hood accessory.
See Figure 5 for minimum clearances.
IMPORTANT: If you cannot meet these minimum
clearances, you must operate heater with chimney
ue damper open. Go to Installing Damper Clamp
Accessory for Vented Operation, page 11.
Safe Installation
12" or more Noncombustible
material OK.
Between 8" and 12" Install replace hood
accessory (GA6050,
GA6052, or GA6053
see Accessories,
page 25).
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
ue damper open.
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14"
Min.
Combustible
Material
Noncombustible Material
You must have noncombustible material(s) above
the replace opening. Noncombustible materials
(such as slate, marble, tile, etc.) must be at least
1/2" thick. With sheet metal, you must have non-
combustible 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 replace hood accessory. Even if
noncombustible material is more than 12", you
may need the hood accessory to deect heat away
from your mantel shelf. See Figure 5 on page 9 and
Figures 6 and 7, for minimum clearances.
Figure 6 - Minimum Mantel Clearances
Without Using Hood
Minimum
Noncombustible
Material
Minimum
Noncombustible
Material Height
Distances to
Underside of
Mantel
Top of
Fireplace
Opening
Underside of
Mantel Shelf
Mantel Shelf
12"
(A)
18" 20" 22" 24"
All minimum
distances are
in inches
2
1/2
"
6"
8"
10"
MANTEL CLEARANCES
In addition to meeting noncombustible material
clearances, you must also meet required clearances
between replace openings and mantel shelf on
each side of the replace. If you do not meet the
clearances listed below, you will need a hood.
If you meet minimum clearance between mantel
shelf and top of replace opening, a hood is not
required (see Figure 6).
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.
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Follow all minimum clearances
NOTICE: If your installation does
not meet the minimum clear-
ances shown, you must do one
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• remove the mantel
FLOOR CLEARANCES
A. If installing appliance on the oor level, you
must maintain the minimum distance of 14"
to combustibles (see Figure 8).
Figure 7 - Minimum Mantel Clearances
When Using Hood
Minimum
Noncombustible
Material
8"
Min.
12" 15" 18"
All minimum
distances
are in inches
20"
2
1/2
"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050,
GA6052 or
GA6053)
Top of
Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
INSTALLATION
Continued
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108382-01G 11
Hearth
5"
Min.
Combustible
Material
INSTALLATION
Continued
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
B. If combustible materials are less than 14" to the
replace, you must install appliance at least 5"
above the combustible ooring (see Figure 9).
INSTALLING DAMPER CLAMP
OPERATION
Note: When used as a vented heater, appliance
must be installed only in a solid-fuel burning
replace with a working ue 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 rea-
sons for operating your heater in the vented mode:
1. The replace does not meet the clearance to com-
bustibles 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 above apply to you, you
must permanently open chimney ue damper. You
must install the damper clamp accessory (to order,
see Accessories, page 25). 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 ue
opening you must provide. Attach damper clamp
so the minimum permanent ue opening will be
maintained at all times.
Diameter Area
5" 20 sq. inches
6" 29 sq. inches
7" 39 sq. inches
8" 51 sq. inches
Minimum Permanent
6' to 15' 39 sq. inches
15' to 30' 29 sq. inches
Damper Clamp
Damper
Clamp
Damper
Damper
Manufactured
Figure 10 - Attaching Damper Clamp
CAUTION: Do not remove the
WARNING: You must secure
not, heater will move when you
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INSTALLATION
Continued
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 exible 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 ma-
sonry as applicable)
• athead screwdriver
1. Apply pipe joint sealant lightly to male
threads of the tting to be threaded into gas
control. Connect approved exible gas hose
to gas control tting in heater (see Figure 11).
IMPORTANT: Hold gas tting with wrench
when connecting exible gas hose.
2.
Locate two masonry screws in hardware package.
3. Place heater base in replace.
4. Place logs in their proper position on heater
base. See Installing Logs, page 15.
5. Center heater base and logs front-to-back and
side-to-side in replace.
6. Carefully remove logs without moving heater
base.
7. Mark screw locations through one hole on each
side of the mounting bracket (see Figure 12).
If installing in a brick-bottom replace, mark
screw locations in mortar joint of bricks.
8. Remove heater base from replace. If install-
ing 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 replace oor using
two masonry screws (in hardware package).
Fitting
Flexible Gas
Hose (if allowed
by local codes)
Figure 11 - Attaching Flexible Gas Hose
to Heater
Figure 12 - Attaching Base Assembly to
Fireplace Floor
Masonry
Screw
Mounting
Flanges
CONNECTING TO GAS SUPPLY
WARNING: Never connect
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WARNING: Never connect
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Installation Items Needed
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-certied equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. Purchase the optional CSA
design-certied equipment shutoff valve from your
dealer. See Accessories, page 25.
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108382-01G 13
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 pres-
sure, 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.
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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).
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 re-
quirements for locating equipment shutoff valve
to replaces.
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.
INSTALLATION
Continued
Figure 13 - External Regulator With Vent
Pointing Down (propane/LP gas only)
Propane/LP
Supply Tank
External
Regulator
Vent
Pointing
Down
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See
Accessories, page 25.
** Minimum inlet pressure for purpose of input
adjustment.
Figure 14 - Gas Connection
Gas Control
3" Minimum
CSA Design-
Certied
Equipment Shutoff
Valve With 1/8"
NPT Tap*
Approved Flexible Gas Hose
(if allowed by local codes)
Pipe Tee
Nipple Cap Joint
Sediment Trap
Natural Gas
From Gas Meter
(5" W.C.** to 10.5" W.C.
Pressure)
From External Regulator
(11" W.C.** to 14" W.C.
Pressure)
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.
www.desatech.com 108382-01G14
CHECKING GAS CONNECTIONS
and connections, internal and
WARNING: Never use an
-
-
Connect-
ing to Gas Supply
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
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 a noncorrosive leak detection uid to gas
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff
valve to gas supply. Check reconnected t-
tings for leaks.
INSTALLATION
Continued
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 Figure 16 or 17).Apply a noncorrosive
leak detection uid to gas joints. Bubbles
forming show a leak.
4. Correct all leaks at once.
Figure 17 - Checking Gas Joints for
Propane/LP Gas
Control Valve
Location
Propane/LP
Supply Tank
Equipment Shutoff Valve
Figure 16 - Checking Gas Joints for
Natural Gas
Gas Meter
Equipment Shutoff Valve
Control Valve
Location
Figure 15 - Equipment Shutoff Valve
Open
Closed
Equipment
Shutoff
Valve
www.desatech.com
108382-01G 15
INSTALLATION
Continued
Figure 18 - Installing Bottom Log (#1)
Bottom Log (#1)
Burner
Chassis
Grate
Burner Port
Figure 19 - Installing Log set (Top View)
Logs
Burner Ports
Figure 20 - Installing Top Log (#2)
Top Log
(#2)
Peg
3. Position log piece (#3) by aligning holes on
underside with remaining pegs on bottom log
(see Figure 21, page 16).
4. Place lava rock around base of heater.
PRESSURE TESTING HEATER GAS
CONNECTIONS
1. Open equipment shutoff valve (see Figure 15,
page 14).
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 control valve (see Figure 16 or 17, page 14).
Apply a noncorrosive leak detection uid to gas
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater, pages 16).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appli-
ance, page 17).
INSTALLING LOGS
CAUTION: After installa-
-
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 t as illustrated
in Figure 18. Make sure open areas of log set line
up with burner ports (see Figure 19). Log will t
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).
www.desatech.com 108382-01G16
INSTALLATION
Continued
Figure 21 - Installing Log Piece (#3)
Log Piece (#3)
Peg
OPERATING HEATER
FOR YOUR SAFETY
WARNING: If you do not fol-
low these instructions exactly,
-
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 oor because some gas is heavier than
air and will settle on the oor.
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 re department.
C. Use only your hand to push in or turn the
gas control knob. Never use tools. If the
knob will not push in or turn by hand, don’t
try to repair it, call a qualied service tech-
nician or gas supplier. Force or attempted
repair may result in a re or explosion.
D.
Do not use this appliance if any part has been
under water. Immediately call a qualied
service technician to inspect the appliance and
to replace any part of the control system and
any gas control which has been under water.
LIGHTING
INSTRUCTIONS
WARNING:
-
erate heater with doors closed,
Note: Homeowners generally prefer to operate
their heater with the chimney damper closed.
This will put all the heat into the room. How-
ever, there may be times you will desire the full
ames of the HI heat setting but will nd the
heat output excessive. You can open the chim-
ney damper (if you have one) fully or partially
to release some of the heat.
1.
STOP! Read the safety information, col-
umn 1.
2. Make sure equipment shutoff valve is
fully open.
3. Set switch in OFF position.
on automatically within one
minute when the selector switch
4. Press in and turn control knob clockwise
to the OFF position.
5. Wait ve (5) minutes to clear out any gas.
Then smell for gas, including near the oor.
If you smell gas, STOP! Follow “B” in the
www.desatech.com
108382-01G 17
safety information, column 1 on page 16. If
you don’t smell gas, go to the next step.
6. Press in and turn control knob counter-
clockwise to the PILOT position.
Press in control knob for ve (5) seconds
(see Figure 22, page 17).
Note: You may be running this heater for
the rst time after hooking up to gas sup-
ply. 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 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
qualied service person or gas supplier for
repairs. Until repairs are made, light pilot
with match. To light pilot with match, see
Manual Lighting Procedure.
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 qualied 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 coun-
terclockwise 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 ame adjustment knob to any level
between HI and LO.
CAUTION: Do not try to ad-
Flame Adjustment Knob
Figure 22 - Control Knob and Ignitor
Button Location (Shown as Supplied, No
Control Options)
O
F
F
P
I
L
O
T
L
O
I
H
AUTO
OFF
ON
O
N
Control Knob
Ignitor Button Selector
Switch
OPERATING HEATER
Continued
selector switch is in the OFF
Heater will come on automati-
cally with selector switch in the
Pilot Burner
Figure 24 - Propane/LP Gas Pilot
Figure 23 - Natural Gas Pilot
Ignitor
Electrode
Pilot Burner
Ignitor
Electrode
TO TURN OFF GAS
TO APPLIANCE
1. Turn control knob clockwise to the
OFF position.
2a. Set selector switch in the OFF position.
2b. Set se-
lector switch in the OFF position to prevent
draining battery.
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
1. Follow steps 1 through 6 under Lighting
Instructions, page 16.
2.
Press 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.
www.desatech.com 108382-01G18
Hold the control button on the hand-held
remote until burner turns on. Hold the con-
trol button again until burner turns off (see
Figure 26).
press both buttons on hand-held
remote control until light stops ashing. Hand-
held remote control is now locked. If the re is
on it will be turned off automatically. In the
locked state, the light will not light up when
any button is pressed.
press both buttons together on hand-
held remote control until the light stops ashing.
The hand-held remote is now unlocked.
OPERATING HEATER
Continued
Figure 25 - Setting the Selector Switch,
Control Knob, and Flame Adjustment
Knob for Hand-Held Remote Operation
Selector Switch in Remote Position
(Optional Hand-Held Remote Control)
ON
OFF
REMOTE
O
F
F
P
I
L
O
T
L
O
I
H
O
N
Control Knob
in On Position
Flame
Adjustment Knob
THERMOSTAT SERIES (MODEL
The hand-held remote can be operated using
either the manual mode (MANU) or thermo-
static mode (AUTO) (see Figure 27). To select
Fahrenheit/Centigrade mode display, carefully
press the ˚C/˚F mode button with the end of a
paper clip or similar blunt object.
Figure 26 - On/Off Hand-Held Remote
Control Unit
OPTIONAL HAND-HELD
REMOTE OPERATION
All remote control accessories must be pur-
chased separately (see Accessories, page 25).
Follow instructions included with the remote
control.
-
Lighting
Instructions
After lighting, let pilot ame burn for about
one minute. Turn control knob to ON position.
Adjust ame adjustment knob anywhere be-
tween HI and LO. Slide the selector switch to
the REMOTE position (see Figure 25). Note:
The burner may light if hand-held remote 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 or ON position when the pilot
is not lit. This will drain the battery.
Control
Button
Indicator
Light
LOCK
MANU AUTO
ºC/ºF
TEMP POWER
ROOM
TEMP
SET
TEMP
AUTO
Turns Hand-
Held Remote
On or Off and
Allows You
to Choose
the Manual
Setting
Selects
AUTO
Mode
°C/°F Mode Button
Locks
System to
Prevent
Accidental
Ignition
Turns
Burners
On or Off
Increases or
Decreases
Room
Temperature in
AUTO Mode
Digital Display Shows
Temperature and Settings
Figure 27 - Thermostat Hand-Held
Remote Control Unit
Piezo
Ignitor
Manual Mode
1.
Press the POWER and LOCK buttons togeth-
er to turn on the hand-held remote control.
2. Press the MANU button to turn on the
replace.
3. Press the POWER and LOCK buttons
together to turn off the replace.
1. Press the POWER and LOCK buttons
together to turn on the hand-held remote
control.
2. Press AUTO button to select this mode.
3. Set the desired room temperature by press-
ing the TEMP + or - buttons.
4. Press the POWER and LOCK buttons
together to turn off the replace
www.desatech.com
108382-01G 19
Note: Do not leave the hand-held remote in the
AUTO mode close to the replace. The radiant
heat from the replace will turn off the replace.
Ideally, place the hand-held remote in the center
of the room facing towards the replace.
Note: Do not hold the hand-held remote for
a long time. Body temperature will affect its
operation in the AUTO mode.
Safety Features
When away from home for an extended period
of time or as a child safety feature to prevent
accidental ignition of the replace, the receiver
ON/OFF/REMOTE switch should be in the
OFF position.
Auto Shutoff Feature
1. If the average room temperature exceeds 82°
Fahrenheit (28° Centigrade), the hand-held
remote control will perform a safety override
and shut the replace off. This feature is not
available in the MANU mode.
2. The receiver continuously receives signals
from the hand-held remote to control the
room temperature. If the hand-held remote
is misplaced, obstructed, or for any reason
cannot transmit to the receiver, the receiver
will shut off the replace after 8 minutes.
This feature allows the user to lock/unlock
the keypad on the hand-held remote in the
MANU or AUTO mode to prevent inadvertent
operation (i.e. children operating the hand-held
remote control, etc.). The keypad is locked in
either on or off. Press the POWER and LOCK
buttons together to turn the unit on or off.
INSPECTING bURNERS
Check pilot ame pattern and burner ame pat-
terns often.
PILOT FLAME PATTERN
Figure 28 shows a correct pilot ame pattern.
Figure 29 shows an incorrect pilot ame pattern.
The incorrect pilot flame is not touching the
thermocouple. When the thermocouple cools, the
heater will shut down.
If pilot ame pattern is incorrect, as shown in
Figure 29
• turn heater off (see To Turn Off Gas to Appli-
ance, page 17)
• see Troubleshooting, page 22
OPERATING HEATER
Continued
Figure 28 - Correct Pilot Flame Pattern
(Propane/LP Pilot Shown)
Pilot Burner
Thermocouple
Pilot Burner
Thermocouple
Figure 29 - Incorrect Pilot Flame Pattern
(Propane/LP Pilot Shown)
Figure 30, page 20, shows a correct burner ame
pattern. Figure 31, page 20, shows an incorrect
burner ame pattern.
If burner ame pattern is incorrect as shown in
Figure 31, page 20
• turn heater off (see To Turn Off Gas to Appli-
ance, page 17)
• see Troubleshooting, page 22
Figure 30 - Correct Flame Pattern
Figure 31 - Incorrect Flame Pattern
Note: The pilot ame on natural gas units will
have a slight curve, but ame should be blue and
have no yellow or orange color.
www.desatech.com 108382-01G20
Injector Holder
(May Be Brass
or Aluminum
Depending on
Model)
Primary Air Inlet
Holes (Shape of Holes
May Vary by Model)
INSPECTING bURNERS
Continued
Air is drawn into the burner through the holes in
the tting 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.
Periodically inspect all burner ame holes with the
heater running. All slotted burner ame holes should
be open with yellow ame present. All round burner
ame holes should be open with a small blue ame
present. Some burner ame holes may become
blocked by debris or rust, with no ame present. If
so, turn off heater and let cool. Remove blockage,
blocked burner ame holes will create soot.
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
-
-
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 ame. 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 qualied
service person.
Figure 32 - Injector Holder On Outlet
Burner Tube
Burner
Tube
Figure 33 - Pilot Inlet Air Hole
Burner
Tube
Pilot
Assembly
Pilot Air
Inlet Hole
Ports/Slots
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 com-
pressed 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 32).
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.
6. In case any large clumps of dust have now been
pushed into the burner repeat steps 3 and 4.
This manual suits for next models
3
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