Desa VRL24NR Quick start guide
For more information, visit www.desatech.com
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
24" AND 30" REMOTE-READy MODELS:
VRL24NR, VRL24PR, VRL30NR, VRL30PR, CSG3924NR,
CSG3924PR, CTB3924NR, CTB3924PR, CSG3930NR, CSG3930PR
24" AND 30" THERMOSTAT MODELS:
VRL24NT, VRL24PT, VRL30NT, VRL30PT, CSG3924NT, CSG3924PT,
CTB3924NT, CTB3924PT
www.desatech.com 110021-01N2
SAFETy INFORMATION
TABLE OF CONTENTS
Safety Informa ion ............................................... 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
Operating Heater............................................... 20
Inspecting Burners............................................. 25
Cleaning and Maintenance................................ 26
Troubleshooting................................................. 28
Optional Positioning of Thermostat Sensing Bulb....32
Wiring Diagram.................................................. 33
Specications .................................................... 34
Illustrated Parts Breakdown and Parts List........ 35
Replacement Parts............................................ 40
Technical Service............................................... 40
Service Hints ..................................................... 40
Accessories ....................................................... 41
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teration, service or main-
tenance can cause in-
Refer to this manual for
correct installation and
For assistance or addi-
tional information con-
WARNING: This is an
-
from the room in which
and ventilation air must
Air
for Combustion and Ven-
tilation
is for installation only in a
-
-
installationsinaccordance
-
tion: Do not install this
-
stalled in an aftermarket,*
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110021-01N 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.
Get fresh air at once! Have replace 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 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.
this heater or its controls can
WARNING: Do not use a
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SAFETy INFORMATION
Continued
forinstallationonly ina solid-fuel
WARNING: Do not allow fans
will remain hot for a time after
-
dren when they are in the room
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SAFETy INFORMATION
Continued
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 ventilation
to run properly. This heater has an Oxygen De-
pletion 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 28.
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 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.
14. Do not operate heater if any log is broken. Do
not operate heater if a log is chipped (dime-
sized or larger).
15. Turn heater off and let cool before servicing,
installing or repairing. Make sure the selector
switch is in the OFF position (Remote-Ready
Models Only). 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 (Remote-Ready Models Only).
17. Remote-ready heaters do not need to be con-
nected to any external electrical source.
18. Operating heater above elevations of 4,500
feet could cause pilot outage.
19. To prevent performance problems with pro-
pane/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) in-
side any structure. Locate propane/LP supply
tank(s) outdoors (propane/LP units only).
3. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch; do not use
any phone in your building
• immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions
• if you cannot reach your gas supplier, call
the re department
4. 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 13 (Remote-Ready
Models only).
5. 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 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 re-
place will cause glass to burst. Make sure there are
no obstructions across openings of replace.
8. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 26.
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110021-01N 5
OPTIONAL REMOTE
CONTROL ACCESSORIES
There are four optional remote controls that
can be purchased separately for Remote-Ready
Models Only:
• wall switch • hand-held ON/OFF remote
• wall thermostat • hand-held thermostat remote
See Accessories, page 41.
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 lat-
est 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
Note: Where listed vented decorative logs are
required, thermostat models are not permitted.
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
Remote-Ready Models
Rear
Burner
Figure 1 - Product Identication
Log Set (Varies
According to Model)
Base
Assembly
Front and Rear
Burner Control Knob
Piezo
Ignitor
Burner
Control
Knob
Thermostat Models
Grate
Pilot
Assembly
Middle
Burner
State of Massachusetts: 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
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 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 all items for any shipping damage. If
damaged, promptly inform dealer where you
bought heater.
PRODUCT FEATURES
This heater is clean burning. It requires no outside
venting. There is no heat loss out a vent or up a
chimney. Heat is generated by both realistic ames
and glowing coals. 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
(ANSI Z21.60) product by opening the ue damper
(Remote-Ready Models Only).
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
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.
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 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 unusually
tight construction, you must provide additional
fresh air.
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110021-01N 7
AIR FOR COMBUSTION
AND VENTILATION
Continued
40,000
31,500
71,500
construction where:
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-112
and
and
If your home meets all of the three criteria
See 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 m3 per kw) of the aggregate input
rating of all appliances installed in that space and
an unconned space as a space whose volume is
not less than 50 cubic feet per 1,000 Btu per hour
(4.8 m3 per 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
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. Di-
rect-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 the space can support)
_________
Btu/Hr (actual amount of Btu/Hr 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 ad-
ditional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoin-
ing 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 Ventila-
tion Air From Outdoors, page 8.
C. Install a lower Btu/Hr replace, if lower Btu/Hr
size makes room unconned.
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INSTALLATION
NOTICE: This heater is intended
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AIR FOR COMBUSTION
AND VENTILATION
Continued
Figure 2 - Ventilation Air from Inside
Building
Figure 3 - Ventilation Air from Outdoors
Outlet
Air
Ventilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills Into
Adjoining
Room,
Option 1
12"
12"
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/NFPA54 Section 5.3
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
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.
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.
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110021-01N 9
WARNING: Installation and
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NOTICE:Stateorlocalcodesmay
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Check your state or local codes
WARNING: Make sure the
selector switch is in the OFF
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WARNING: Seal any fresh
air vents or ash clean-out doors
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INSTALLATION
Continued WARNING: Never install the
heater
unless installed as a vented
-
• in a recreational vehicle
• where curtains, furniture,
• 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 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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24" 17" 14" 28" 20 1/4"
30" 17" 14" 34" 22 3/8"
*Measured at 14" Depth
Figure 4 - Minimum Clearance for
Combustible to Wall
*Minimum 16 inches from Side Wall
*
Example
NOTICE: Manual control heaters
If so, you must always run heater
Installing Damper
Clamp Accessory for Vented
Operation
Clearances
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 inch thick. With sheet metal, you must have
noncombustible material behind it. Noncom-
bustible 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 minimum
clearances, you must operate heater with chimney
ue damper open. Go to Installing Damper Clamp
Accessory for Vented Operation, page 13.
You must have noncombustible material(s) above
the replace opening. 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 inches up (for all
models). If noncombustible material is less than
12", you must install the replace hood accessory
(24" model only). Even if noncombustible 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 minimum
clearances, you must operate heater with chimney
ue damper open. Go to Installing Damper Clamp
Accessory for Vented Operation, page 13.
INSTALLATION AND CLEARANCES
WARNING: Maintain the
INSTALLATION
Continued
Carefully follow the instructions below. This will
ensure safe installation into a masonry, UL127-
listed manufactured replace or certied vent-free
rebox.
Minimum Clearances For Side
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 inches.
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110021-01N 11
12" or more Noncombustible material okay.
Between 8" Install replace hood and 12"
accessory (GA6050, GA6052 or
GA6053, see Accessories, page 41).
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.
INSTALLATION
Continued
MANTEL CLEARANCES
In addition to meeting noncombustible material
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 Non-
Combustible
Material
Minimum Non-
Combustible
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
Log Set
All Models
2
1/2
"
6"
8"
10"
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Minimum
Noncombustible
Material
8"
Min.
12" 15" 18" 20"
2½"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050,
GA6052 or
GA6053)
Top of
Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
INSTALLATION
Continued
If minimum clearances in Figure 6 (page 11) 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 a hood.
-
-
Follow all minimum clearances
NOTICE: If your installation does
not meet the minimum clear-
ances shown, you must do one
-
• 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).
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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110021-01N 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
Manufactured
Damper
Damper
Clamp
Damper
Damper
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 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 41). 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.
INSTALLATION
Continued
CAUTION: Do not remove the
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-
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INSTALLATION
Continued
IMPORTANT: Make sure the heater burners are
level. If heater is not level, heater will not work
properly. For thermostat models, avoid damage
to thermostat bulb. Avoid nicks or sharp bends
in thermostat bulb wire. Keep thermostat bulb
in mounting bracket until ready to mount base
to oor. See Optional Positioning Of Thermostat
Sensing Bulb, page 32.
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
• athead screwdriver
1. Connect tting to base as shown in Figure 11.
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 18).
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).
CAUTION: Never connect
-
units, never connect heater to
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 (30" Model Shown)
Masonry Screw
Mounting
Flange
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110021-01N 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 alternative to
test gauge connection. Purchase the optional CSA
design-certied equipment shutoff valve from your
dealer. See Accessories, page 41.
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 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.
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 or 15, page
16, depending on your model).
IMPORTANT: Install equipment shutoff valve in an
accessible location. The main gas valve is for turn-
ing 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.
We recommend that you install sediment trap
in supply line as shown in Figure 14 or 15, page
16, depending on your model. 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.
-
Propane/LP
Supply Tank
External
Regulator
Vent
Pointing
Down
www.desatech.com 110021-01N16
INSTALLATION
Continued
CHECKING GAS CONNECTIONS
and connections, internal and
external to unit, for leaks after
WARNING: Never use an
-
-
Connecting
to Gas Supply
1. Disconnect appliance with its appliance main
gas valve (control valve) and equipment shutoff
valve from gas supply piping. Pressures in ex-
cess 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 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.
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See
Accessories, page 41.
** Minimum inlet pressure for purpose of input
adjustment.
Figure 15 - Gas Connection (Remote-
Ready Models Only)
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)
Figure 14 - Gas Connection
Cap Pipe Tee
Nipple Joint
3" Min.
Sediment Trap
Gas
Regulator
CSA Design-Certied
Equipment Shutoff Valve
With 1/8" NPT Tap*
Approved Flexible Gas
Hose (if allowed by
local codes)
Natural From Gas
Meter (5" W.C.**
to 10.5" W.C.
Pressure)
From External
Regulator
(11" W.C.**
to 14" W.C.
Pressure
www.desatech.com
110021-01N 17
1. Close equipment shutoff valve (see Figure 16).
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 17 or 18). Apply a com-
mercial leak detection solution to all joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
Connections
1. Open equipment shutoff valve (see Figure 16).
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 thermostat gas valve (Thermostat-
Controlled Models) or control valve (Remote-
Ready Models) (see Figure 17 or 18). Apply a
noncorrosive leak detection uid to all joints.
Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater, page 20).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Ap-
pliance, page 21 [thermostatically-controlled
models] or page 24 [remote-ready models]).
Figure 16 - Equipment Shutoff Valve
Equipment
Shutoff Valve
Propane/LP
Supply
Tank
Thermostat Gas
Valve or Control
Valve Location
Figure 18 - Checking Gas Joints
(Natural Gas Only)
Gas Meter
Equipment
Shutoff Valve
Figure 17 - Checking Gas Joints
(Propane/LP Gas Only)
Open
Closed
Equipment
Shutoff Valve
INSTALLATION
Continued
Thermostat Gas
Valve or Control
Valve Location
www.desatech.com 110021-01N18
INSTALLATION
Continued
INSTALLING LOGS
-
CAUTION: After installa-
-
It is very important to install the logs exactly as
instructed. Do not modify logs. Only use logs sup-
plied with heater. Before installing logs, make sure
log alignment screws are in place and straight.
1. Place log #1 (ember bed) onto base over align-
ment screws to left of front burner and behind
middle burner. Log #1 will sit on top of front
and middle burners (see Figure 19).
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 20).
3. Place log #3 on left side of base and onto
alignment screw to right of rear burner (see
Figure 20). Log #3 will wrap around left end
of rear burner.
4. Place log #4 onto two alignment screws to the
rear of base (see Figure 21).
Figure 19 - Installing Log #1 (Ember Bed)
(Model CSG3924NR Shown)
Log #1
Log #5 will
seat in this
location.
Figure 20 - Installing Log #2 (Right) and
Log #3 (Left) (Model CSG3924NR Shown)
Figure 21 - Installing Log #4 (Model
CSG3924NR Shown)
Log #4
Log #3
Log #1
Log #2
Log #3
Log #1
Log #2
www.desatech.com
110021-01N 19
INSTALLATION
Continued
Figure 22 - Installing Log #5 (Right) and
Log #6 (Left) (Model CSG3924NR Shown)
Log #5
Log #6
Log #4
Log #3
Log #1
Log #2
5. Place back of log #5 on notch in log #4 (as
shown in Figure 22), across back part of log
#1 and onto pin on log #2 (see Figure 20, page
18 and Figure 22).
6. Place log #6 onto two pins on log #1 (ember
bed) and rest back of log #6 on back log #4
(see Figure 22).
Figure 23 - Installing Log #2 (Right) and
Log #3 (Left) (Model VRL30NR Shown)
Figure 24 - Installing Log #4 (Model
VRL30NR Shown)
Figure 25 - Installing Log #5 and Log #6
(Model VRL30NR Shown)
Log #6
Log #5
Log #2
Log #4
Log #3
Log #1
Log #2
Log #3
Log #1
Log #4
Log #2
Log #3
Log #1
1. Place log #1 (ember bed) onto base over log
alignment screws to the left of front burner
and behind middle burner. Log #1 will sit on
top of front and middle burners (see Figure
19, page 18).
2. Place log #2 to right of log #1 and onto log
alignment screw as shown in Figure 23. Log
#2 will wrap around right end of rear burner
(see Figure 23).
3. Place log #3 on left side of base and onto
alignment screw to right of rear burner (see
Figure 23). Log #3 will wrap around left end
of rear burner.
4. Place log #4 onto two alignment screws to rear
of base (see Figure 24).
5. Locate hole on bottom of log #5 and place over
pin on log #2. Log #5 will rest on back of log
#1 (ember bed). See Figure 19, page 18 and
Figure 25.
6. Place log #6 onto two pins on log #1 (ember
bed) and rest back of log #6 on back log #4
(see Figure 25).
www.desatech.com 110021-01N20
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,
-
-
OPERATING HEATER
THERMOSTAT-CONTROLLED
MODELS
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.
Figure 26 - Attaching Grate to Base
Assembly (Logs and Base Will Vary
According to Model)
Grate
Slots in Base
Locate the two slots in the front of the base as-
sembly. Carefully slide the decorative grate into
these slots (see Figure 26).
Place lava rock around base of heater if desired.
Be sure not to cover the control knobs or air inlet
openings on the front of heater.
INSTALLATION
Continued
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