Desa CSG3924NRA Quick start guide
UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
24" REMOTE-READy MODELS
CSG3924NRA AND CSG3924PRA
For more information, visit www.desatech.com
WARNING: If the information in this manual is not
— WHAT TO DO IF YOU SMELL GAS
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www.desatech.com 123639-01D2
SAFETy
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additional information
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WARNING: This is an
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Air
for Combustion and Ven-
tilation
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for these installations in
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TABLE OF CONTENTS
Safety .................................................................. 2
Product Identication........................................... 5
Optional Remote Control Accessories................. 5
Local Codes......................................................... 5
Unpacking............................................................ 6
Product Features................................................. 6
Air For Combustion and Ventilation..................... 6
Installation ........................................................... 8
Operation........................................................... 19
Inspecting Burners............................................. 22
Cleaning and Maintenance................................ 23
Troubleshooting................................................. 25
Wiring Diagram.................................................. 29
Specications .................................................... 29
Parts .................................................................. 30
Replacement Parts............................................ 32
Service Hints ..................................................... 32
Technical Service............................................... 32
Accessories ....................................................... 33
Warranty ..............................................Back Cover
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123639-01D 3
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known to the State of California
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Early signs of
carbon monoxide poisoning resemble the u,
with headaches, dizziness or nausea. If you
have these signs, the replace may not be
working properly. Have
replace serviced. Some people are more af-
fected by carbon monoxide than others. These
include pregnant women, people with heart or
lung disease or anemia, those under the inu-
ence of alcohol and those at high altitudes.
Natural and
propane/LP gases are odorless. An odor-
making agent is added to these gases. The
odor helps you detect a gas leak. However,
the odor added to the gas can fade. Gas may
be present even though no odor exists.
Make certain you read and understand all
warnings. Keep this manual for reference. It
is your guide to safe and proper operation of
this replace.
WARNING: Do not use a
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SAFETy
Continued
for installation only in a solid-fu-
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
Continued
8. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 26.
9. Before using furniture polish, wax, carpet
cleaner or similar products, turn heater off. If
heated, the vapors from these products may
create a white powder residue within burner
box or on adjacent walls or furniture.
10. This heater needs fresh, outside air ven-
tilation to run properly. This heater has an
Oxygen Depletion Sensing (ODS) safety
shutoff system. The ODS shuts down the
heater if not enough fresh air is available.
See Air for Combustion and Ventilation,
page 6. If heater keeps shutting off, see
Troubleshooting, page 25.
11. Do not run heater
• where ammable liquids or vapors are
used or stored
• under dusty conditions
12. Do not use this heater to cook food or burn
paper or other objects.
13. Do not use heater if any part has been ex-
posed 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.
14. Do not operate heater if any log is broken.
Do not operate heater if a log is chipped
(dime-sized or larger).
15. Turn heater off and let cool before servic-
ing, installing or repairing. Make sure the
selector switch is in the OFF position. Only
a qualied service person should install,
service or repair heater.
16. Make sure the selector switch is in the
OFF position when you are away from
home for long periods of time.
17. Remote-ready heaters do not need to
be connected to any external electrical
source.
18. Operating heater above elevations of
4,500 feet could cause pilot outage.
19. To prevent performance problems with
propane/LP models, do not use propane/
LP fuel tank of less than 100 lb. capacity.
20. Provide adequate clearances around air
openings.
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1. This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with
other gases.
2. Do not place propane/LP supply tank(s)
inside any structure. Locate propane/LP
supply tank(s) outdoors (propane/LP units
only).
3. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch; do not
use any phone in your building
• immediately call your gas supplier from
a neighbor’s phone. Follow the gas sup-
plier’s instructions
• if you cannot reach your gas supplier,
call the re department
4. This heater shall not be installed in a bed-
room or bathroom unless installed as a
vented appliance. See Installing Damper
Clamp Accessory for Vented Operation,
page 13. This gas log set may not be
installed as a vented appliance in a bed-
room or bathroom in the Commonwealth
of Massachusetts.
5. Before installing in a solid fuel burning re-
place, 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 and rebox for damage. If damaged,
repair ue before operating heater.
6. Do not burn solid-fuel in a masonry or
UL127 factory-built replace in which a
vent-free room heater is installed.
7. 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.
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123639-01D 5
OPTIONAL REMOTE CONTROL ACCESSORIES
PRODUCT IDENTIFICATION
Base
Assembly
Piezo
Ignitor
Front and Rear
Burner Control
Knob
Selector Switch
(Optional)
ON/OFF/
PILOT Knob
Remote Control (Optional)
Grate
Front
Burner
Rear
Burner
Figure 1 - Product Identication
Pilot
Assembly
Middle
Burner
There are four optional remote controls that
can be purchased separately:
• wall switch
• wall thermostat
• hand-held ON/OFF remote
• hand-held thermostat remote
See Accessories, page 33.
The wall thermostat or hand-held thermostat
may not be used where vented decorative
listing is required.
LOCAL CODES
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/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
The installa-
tion must be made by a licensed plumber
or gas fitter 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
Commonwealth of Massachusetts.
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UNPACkING
WARNING: This heater shall
National Fuel Gas Code, ANSI
Z223.1/NFPA 54, the International
Fuel Gas Code,
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
efcient, your home needs to breathe. Fresh
air must enter your home. All fuel-burning ap-
pliances need fresh air for proper combustion
and ventilation.
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1. Remove logs and heater base assembly
from carton.
Note: Do not pick up heater base as-
sembly by burners. This could damage
heater. Always handle base assembly by
the sides of assembly.
2. Remove all protective packaging applied
to logs and heater for shipment.
3. Check heater for any shipping damage. If
heater is damaged call DESA Heating, LLC
at 1-866-672-6040 for replacement parts
before returning to dealer.
PRODUCT FEATURES
This heater is clean burning. It requires no out-
side venting. There is no heat loss out a vent or
up a chimney. Heat is generated by both realistic
ames and glowing coals. This heater is de-
signed for vent-free operation with ue damper
closed. It has been tested and approved toANSI
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 (ANSI Z21.60)
product by opening the ue damper.
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.
This heater has a piezo ignitor. This system re-
quires no matches, batteries or other sources
to light heater.
AIR FOR COMBUSTION AND VENTILATION
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, Air for
Combustion and Ventilation.
All spaces in homes fall into one of the three
following ventilation classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space
The information on pages 6 through 8 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 ventilation. However, in buildings of un-
usually tight construction, you must provide
additional fresh air.
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123639-01D 7
AIR FOR COMBUSTION AND VENTILATION
Continued
40,000
31,500
71,500
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-112
and
and
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/hr (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/hr (4.8 m3per kw) of the aggregate
input rating of all appliances installed in that
space. Rooms communicating directly with the
space in which the appliances are installed*,
through openings not furnished with doors, are
considered a part of the unconned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.
DETERMINING FRESH-AIR FLOW
Use this work sheet to determine if you have
a conned or unconned space.
Includes the room in which you will install
replace 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) = 2,560 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 = (Maxi-
mum Btu/Hr the space can support)
Example: 2,560 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 replace __________ 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.
Direct-vent draws combustion air from the
outdoors and vents to the outdoors.
Example:
Gas water heater __________ Btu/Hr
Vent-free replace + _________ 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 space can support)
_____ Btu/Hr (actual amount used)
Example: 51,200 Btu/Hr (maximum the
space can support)
79,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the 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 additional fresh air. Your options are
as follows:
A.
Rework worksheet, adding the space of an
adjoining room. If the extra space provides an
unconned space, remove door to adjoining
room or add ventilation grills between rooms. See
Ventilation Air From Inside Building, page 8.
B. Vent room directly to the outdoors. See
Ventilation Air From Outdoors, page 8.
C.
Install a lower Btu/Hr replace, if lower
Btu/Hr size makes room unconned.
If the actual Btu/Hr used is less than the maxi-
mum Btu/Hr the space can support, the space is
an unconned space. You will need no additional
fresh air ventilation.
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INSTALLATION
AIR FOR COMBUSTION AND VENTILATION
Continued
Figure 2 - Ventilation Air from Inside
Building Figure 3 - Ventilation Air from Outdoors
Outlet
Air
V e ntilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air V e ntilated
Crawl Space
T o
Crawl
Space
T o Attic
Or
Remove
Door into
Adjoining
Room,
Option
3
Ve ntilation Grills
Into Adjoining Room,
Option 2
Ve ntilation
Grills Into
Adjoining
Room,
Option 1
12"
12"
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National Fuel
Gas Code,ANSI Z223.1/NFPA 54,
the International Fuel Gas Code,
This fresh air would come from an adjoining
unconfined space. When ventilating to an
adjoining unconned space, you must provide
two permanent openings: one within 12" of the
ceiling and 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). Fol-
low the National Fuel Gas Code ANSI Z223.1/
NFPA 54, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
Provide extra fresh air by using ventilation
grills or ducts. You must provide two perma-
nent 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, 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 thermo-
stat-controlled power vent. Heated air entering
the attic will activate the power vent.
NOTICE: This heater is intended
WARNING: Installation and
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123639-01D 9
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WARNING: Make sure the
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WARNING: Seal any fresh
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heater
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INSTALLATION
Continued
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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 Ventila-
tion, page 6.
Use only the correct gas type (natural or pro-
pane/LP) for your unit. If your gas supply is not
correct, do not install heater. Call dealer where
you bought heater for proper type heater.
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INSTALLATION AND CLEARANCES
WARNING: Maintain the
Height
Front
Width
Rear
17" 14" 28" 20 1/4"
*Measured at 14" Depth
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Figure 4 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
*
Example
If Not Using Mantel
Note: If using a mantel, proceed to If Using
Mantel below. If not using a mantel, follow the
information below.
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 noncombustible material be-
hind it. Noncombustible material must extend
at least 8" up. If noncombustible material is
less than 12", you must install the replace
hood accessory. See Figure 5, page 11, for
minimum clearances.
IMPORTANT: If you cannot meet these mini-
mum clearances, you must operate heater
with chimney ue damper open. Go to Install-
ing Damper Clamp Accessory for Vented
Operation, page 13.
If Using Mantel
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 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 replace hood
accessory (24" model only). Even if noncombus-
tible material is more than 12", you may need the
hood accessory to deect heat away from your
mantel shelf. See Figures 5 and 6, page 11 and
Figure 7 page 12, for minimum clearances.
IMPORTANT: If you cannot meet these mini-
mum clearances, you must operate heater
with chimney ue damper open. Go to Install-
ing Damper Clamp Accessory for Vented
Operation, page 13.
INSTALLATION
Continued
Carefully follow the instructions below. This
will ensure safe installation into a masonry,
UL127-listed manufactured replace or certi-
ed vent-free rebox.
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A. Clearances from the side of the replace
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 com-
bustible material must be 4" from the side
of the replace cabinet (see Figure 4).
Note: When installing your gas logs into
a manufactured rebox, follow rebox
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".
Installing Damper
Clamp Accessory for Vented
Operation
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123639-01D 11
INSTALLATION
Continued
MANTEL CLEARANCES
In addition to meeting noncombustible mate-
rial clearances, you must also meet required
clearances between replace opening and
mantel shelf. 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).
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace
Figure 6 - Minimum Mantel Clearances Without Using Hood
Minimum
Noncombustible
Material
Minimum
Noncombustible
Material Height
Distances to
Underside of
Mantel
To p of
Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
12"
(A)
18" 20" 22" 24"
All minimum
distances are
in inches
Log Set
All
Models
2
1/2
"
6"
8"
10"
12" or more Noncombustible material okay.
Between 8" Install replace hood and 12" accessory
(GA6050, GA6052 or GA6053, see
Accessories, page 33).
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.
www.desatech.com 123639-01D12
Minimum
Noncombustible
Material
8"
Min.
12" 15" 18" 20"
2½"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050,
GA6052 or
GA6053)
To p of
Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
INSTALLATION
Continued
when Using a Hood
If minimum clearances in Figure 6 (see page 11)
are not met, you must have a hood. When using
a hood there are still certain minimum mantel
clearances required. Follow minimum clear-
ances shown in Figure 7 when using a hood.
NOTICE: If your installation does
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of the following:
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FLOOR CLEARANCES
A. If installing appliance on the oor level,
you must maintain the minimum distance
of 14" to combustibles (see Figure 8).
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).
Hearth
5"
Min.
Combustible
Material
14"
Min.
Combustible
Material
Noncombustible Material
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
Figure 7 - Minimum Mantel Clearances When Using Hood
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123639-01D 13
Diameter Area
5" 20 sq. inches
6" 29 sq. inches
7" 39 sq. inches
8" 51 sq. inches
6' to 15' 39 sq. inches
15' to 30' 29 sq. inches
Figure 10 - Attaching Damper Clamp
Damper
Damper
Clamp
Damper
Damper
Note: When used as a vented heater, ap-
pliance must be installed only in a solid-fuel
burning replace with a working ue and con-
structed of noncombustible material.
Instal-
lation of this vented gas log set in the Com-
monwealth of Massachusetts requires the
damper be permanently removed or welded
in the fully open position.
If your heater is a manually-controlled model,
you may use this heater as a vented product.
There are three reasons for operating your
heater in the vented mode.
1. The replace does not meet the clearance
to combustibles requirements for vent-
free operation.
2. State or local codes do not permit vent-
free operation.
3. You prefer vented operation.
If reasons number 1 or 2 above apply to you,
you must permanently open chimney ue
damper. You must install the damper clamp
accessory (to order, see Accessories, page
33). This will insure vented operation (see Fig-
ure 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 open-
ing will be maintained at all times.
INSTALLATION
Continued
WARNING: If installing in a
and guard against sooting and
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INSTALLATION
Continued
IMPORTANT: Make sure the heater burners
are level. If heater is not level, heater will not
work properly.
Installation Items Needed
• hardware package (provided with heater)
• approved exible gas hose (if allowed by
local codes)
•
sealant (resistant to propane/LP gas, not
provided)
• electric drill with 3/16" drill bit
• athead screwdriver
1. Apply pipe joint sealant lightly to male
threads of gas tting. Connect approved
exible gas hose to tting in base (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 17).
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
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 replace oor
using two masonry screws (in hardware
package).
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WARNING: For natural gas
Figure 11 - Attaching Flexible Gas Hose
to Heater
Fitting
Flexible Gas Hose
(if allowed by local
codes)
Figure 12 - Attaching Base Assembly to
Fireplace Floor
Masonry Screw
Mounting
Flange
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123639-01D 15
Installation Items Needed
Before installing heater, make sure you have
the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A CSA design-certied equipment shutoff
valve with 1/8" NPT tap is an acceptable al-
ternative to test gauge connection. Purchase
the optional CSA design-certied equipment
shutoff valve from your dealer. See Acces-
sories, page 33.
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" of water. If you do not reduce incom-
ing 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.
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INSTALLATION
Continued
Figure 13 - External Regulator With Vent
Pointing Down
Installation must include a 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 main gas 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 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.
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
Propane/LP
Supply Tank External
Regulator
with Vent
Pointing
Down
* Minimum inlet pressure for purpose of input
adjustment.
Figure 14 - Gas Connection
Gas Control Valve
Tee Pipe Cap
Joint Nipple
3" Minimum
Sediment Trap
From
External Regulator
(11" W.C.* to
14" W.C. Pressure)
NATURAL From Gas
Meter (5" W.C.**
to 10.5" W.C.
Pressure)
CSA Design-Certied
Equipment Shutoff Valve
With 1/8" NPT Tap
Approved
Flexible Gas
Hose (if allowed
by local codes)
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INSTALLATION
Continued
CHECKING GAS CONNECTIONS
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See guidelines under Connect-
ing to Gas Supply
1. Disconnect appliance with its appliance
main gas valve (control valve) and equip-
ment shutoff valve from gas supply piping.
Pressures in excess of 1/2 psig will dam-
age heater regulator.
2. Cap off open end of gas pipe where equip-
ment 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 sys-
tem. Apply a commercial leak detection
solution to all joints. Bubbles forming show
a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff
valve to gas supply. Check reconnected
ttings for leaks.
1. Close equipment shutoff valve (see Fig-
ure 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 for natural
gas or propane/LP supply to equipment
shutoff valve (see Figure 16 or 17, page
17). Apply a commercial leak detection
solution to all joints. Bubbles forming show
a leak.
4. Correct all leaks at once.
CONNECTIONS
1. Open equipment shutoff valve (see Fig-
ure 15).
2. Open main gas valve located on or near
gas meter for natural gas or open pro-
pane/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 17). Apply a noncorrosive leak
detection uid to all joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Light heater (see Operation, page 19).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 21.
Figure 15 - Equipment Shutoff Valve
Open
Closed
Equipment
Shutoff Valve
into heater controls. If sediment trap is not
installed or is installed wrong, heater may
not run properly.
www.desatech.com
123639-01D 17
Equipment
Shutoff Valve
Propane/LP
Supply
Tank
Control Valve
Location
Figure 17 - Checking Gas Joints
(Natural Gas Only)
Gas Meter
Equipment
Shutoff Valve
Figure 16 - Checking Gas Joints
(Propane/LP Gas Only)
INSTALLATION
Continued
Control Valve
Location
INSTALLING LOGS
-
with these diagrams or failure
CAUTION: After installa-
-
It is very important to install the logs exactly
as instructed. Do not modify logs. Only use
logs supplied with heater. Before installing
logs, make sure log alignment screws are in
place and straight.
1. Place log #1 (ember bed) onto base over
alignment screws to left of front burner
and behind middle burner. Log #1 will sit
on top of front and middle burners (see
Figure 18).
2. Place log #2 to the right of log #1. Log #2 will
wrap around right end of rear burner and sit
on log alignment screw (see Figure 19).
3. Place log #3 on left side of base and onto
alignment screw to right of rear burner
(see Figure 19). Log #3 will wrap around
left end of rear burner.
Figure 18 - Installing Log #1 (Ember Bed)
Log #1
Log #5 will seat
in this location
Figure 19 - Installing Log #2 (Right) and
Log #3 (Left)
Log #3
Log #1
Log #2
www.desatech.com 123639-01D18
INSTALLATION
Continued
Figure 20 - Installing Log #4
Figure 21 - Installing Log #5 (Right) and
Log #6 (Left)
Log #5
Log #6
Log #4
Log #3
Log #1
Log #2
Log #4
Log #3
Log #1
Log #2
Locate the two slots in the front of the base
assembly. Carefully slide the decorative grate
into these slots (see Figure 22).
Figure 22 - Attaching Grate to Base
Assembly (Logs and Base Will Vary
According to Model)
Grate
Slots in Base
Place lava rock around base of heater if de-
sired. Be sure not to cover the control knobs
or air inlet openings on the front of heater.
4. Place log #4 onto two alignment screws
to the rear of base (see Figure 20).
5. Place back of log #5 on notch in log #4 (as
shown in Figure 21), across back part of
log #1 and onto pin on log #2 (see Figure
19, page 18 and Figure 21).
6. Place log #6 onto two pins on log #1
(ember bed) and rest back of log #6 on
back log #4 (see Figure 21).
www.desatech.com
123639-01D 19
FOR YOUR SAFETY
WARNING: If you do not fol-
-
WHAT TO DO IF YOU SMELL GAS
-
LIGHTING
INSTRUCTIONS
WARNING
-
-
Note: Home owners generally prefer to oper-
ate 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 ames of the HI heat setting but will
nd the heat output excessive. You can open
the chimney damper (if you have one) fully or
partially to release some of the heat.
1. STOP! Read the safety information, col-
umn 1.
2. Make sure equipment shutoff valve is fully
open.
3. Set switch in OFF position.
-
OPERATION
www.desatech.com 123639-01D20
OPERATION
Continued
CAUTION: Do not try to ad-
-
WARNING: Make sure the
-
4. Press in and turn control knobs 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 safety information on page 19. 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 23).
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, page 21.
8. Keep control knob pressed in for 30 sec-
onds 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 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. To light the front/rear burners, push in
and turn rear burner control knob coun-
terclockwise to the ON position.
12. To leave pilot lit and shut off burners only,
turn control knob clockwise to
PILOT position then rear burner control
knob clockwise to OFF position or
use remote control manual OFF button or
set selector switch in the OFF position.
O
F
F
P
I
L
O
T
AUTO
OFF
ON
O
N
Figure 23 - Control Knobs and Ignitor
Button Locations (Shown as Supplied,
No Remote Control Operation)
Rear Burner
Control Knob
Selector
Switch
Ignitor Button
Control Knob
Figure 24 - Pilot
(Propane/LP)
Ignitor Electrode
Figure 25 - Pilot
(Natural)
Pilot Burner
Thermocouple
Thermocouple
This manual suits for next models
1
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