Desa LDL3924NR Quick start guide
For more information, visit www.desatech.com
WARNING: If the information in this manual is not
— 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
LDL3924NR, LDL3924PR, LDL3930NR AND LDL3930PR
www.desatech.com 111515-01J2
SAFETY
alteration, service, or
maintenance can cause
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for correct installation
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additional information
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masonry or UL127 fac-
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in accordance with ANSI
that includes instructions
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WARNING: This is an
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from the room in which
and ventilation air must
Air
for Combustion and Ven-
tilation
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stalled in an aftermarket,*
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TAbLE OF CONTENTS
Safety .................................................................. 2
Local Codes......................................................... 4
Unpacking............................................................ 5
Product Identication........................................... 5
Product Features................................................. 5
Air For Combustion and Ventilation ..................... 5
Installation ........................................................... 8
Operation........................................................... 17
Inspecting Heater .............................................. 21
Cleaning and Maintenance................................ 21
Troubleshooting................................................. 23
Replacement Parts............................................ 27
Service Hints ..................................................... 27
Technical Service............................................... 27
Illustrated Parts Breakdown............................... 28
Specications .................................................... 30
Wiring Diagram.................................................. 30
Accessories ....................................................... 31
Warranty ..............................................Back Cover
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111515-01J 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 heater may not be
working properly. Have
heater 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 the gas. The odor
helps you detect a gas leak. However, the
odor added to the gas can fade. Gas may be
present even though no odor exists.
Make certain you read and understand all
warnings. Keep this manual for reference. It
is your guide to safe and proper operation of
this heater.
this heater or its controls can
WARNING: Do not use a
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SAFETY
Continued 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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www.desatech.com 111515-01J4
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/LPsupply
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
appliance. See Installing Damper Clamp
Accessory for Vented Operation, page 11.
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 for damage. If damaged, repair ue
and rebox 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 opening of replace.
8. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 21.
9. Before using furniture polish, wax, carpet
cleaner, or similar products, turn heater off. If
heated, the vapors from these products may
create a white powder residue within burner
box or on adjacent walls and furniture.
10. This heater needs fresh, outside air ven-
tilation to run properly. This heater has an
Oxygen Depletion Sensing (ODS) safety
shutoff system. The ODS shuts down the
heater if enough fresh air is not available.
See Air for Combustion and Ventilation,
page 5. If heater keeps shutting off, see
Troubleshooting, page 23.
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. Only a qualied
service person should install, service, or
repair heater.
16. Operating heater above elevations of
4,500 feet may cause pilot outage.
17. To prevent performance problems, do not
use propane/LP fuel tank of less than 100
lb. capacity (propane/LP units only).
18. Provide adequate clearances around air
openings.
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 Z223.1/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.
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.
SAFETY
Continued
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111515-01J 5
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 assembly by burners. This could
damage heater. Always handle base as-
sembly 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 IDENTIFICATION
Figure 1 - Product Identication
Control
Cover Log
Remote
Control
Control Knob and Piezo
Ignitor (behind cover log)
8 Piece
Log Set
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
realistic 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 (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
requires 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 insula-
tion, 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.
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 5 through 7 will help
you classify your space and provide adequate
ventilation.
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AIR FOR COMbUSTION
AND VENTILATION
Continued
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.
construction where:
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-112
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 lessa than 50 cubic feet per
1,000 Btu per hour (4.8 m3per kw) of the ag-
gregate 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 communicating
directly with the space in which the appliances
are installed*, through openings not furnished
with doors, are considered a part of the un-
conned 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 passageways or ventilation grills
between the rooms.
1. Determine the volume of the space (length
x width x height).
Length x Width x Height = _____ cu. ft.
(volume of space)
Example: Space size 20 ft. (length) x 16
ft. (width) x 8 ft. (ceiling height) = 2560 cu.
ft. (volume of space)
If additional ventilation to adjoining room
is supplied with grills or openings, add the
volume of these rooms to the total volume
of the space.
2. Multiply the space volume by 20 to deter-
mine the maximum Btu/Hr the space can
support.
___________ (volume of space) x 20
= (Maximum Btu/Hr the space can sup-
port)
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 appli-
ances 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 appli-
ances. Direct-vent draws combustion
air from the outdoors and vents to the
outdoors.
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.
40,000
33,000
73,000
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111515-01J 7
____________ Btu/Hr (maximum the
space can support)
____________ Btu/Hr (actual amount of
Btu/Hr used)
Example:
51,200 Btu/Hr (maximum the space can
support)
73,000 Btu/Hr (actual amount of Btu/Hr
used)
The space in the above example is a conned
space because the actual Btu/Hr used is more
than the maximum Btu/Hr the space can sup-
port. You must provide additional fresh air.
Your options are as follo ws:
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.
B. Vent room directly to the outdoors. See
Ventilation Air From Outdoors.
C. Install a lower Btu/Hr heater, if lower
Btu/Hr size makes room unconned.
WARNING: If the area in
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in the National Fuel Gas Code,
ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation or
This fresh air would come from an adjoining
unconned space. When ventilating to an
adjoining unconned space, you must provide
two permanent openings: one within 12" of the
AIR FOR COMbUSTION
AND VENTILATION
Continued
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, 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.
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"
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
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INSTALLATION
WARNING: Never install the
heater
unless installed as a vented
• in a recreational vehicle
• where curtains, furniture,
heater
• 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 Ventila-
tion, page 5.
Use the correct gas type (natural or propane/
LP) for your unit. If your gas supply is not cor-
rect, do not install log set. Call dealer where
you bought log set for proper type replace.
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NOTICE: This heater is intended
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NOTICE:Stateorlocalcodesmay
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WARNING: Make sure the se-
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cleaned of soot, creosote, ashes
WARNING: Seal any fresh
air vents or ash clean-out doors
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111515-01J 9
INSTALLATION
Continued
Carefully follow the instructions below. This
will ensure safe installation into a masonry,
UL127-listed manufactured replace, or listed
vent-free rebox.
Minimum Clearances For Side
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".
Figure 4 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
*
Example
INSTALLATION AND CLEARANCES
WARNING: Maintain the
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Size
Front
Width
Rear *
Width
24" 17" 14" 28" 21"
30" 17" 14" 34" 24"
Side Wall 16", Ceiling 42", Front 36"
* Measured at 14" depth.
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. If not using a mantel, follow the infor-
mation on this page.
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 10 for
minimum clearances.
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INSTALLATION
Continued
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
Material Safe Installation
12" or more Noncombustible
material OK.
Between 8" and 12"
24" or 30" Models:
Install replace hood
accessory (GA6050,
GA6052, or GA6053 see
Accessories, page 31).
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.
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. 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, 6 and 7 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 11.
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).
If minimum clearances in Figure 6 are not met,
you must have a hood. When using a hood
there are still certain minimum mantel clear-
ances required. Follow minimum clearances
shown in Figure 7 when using hood.
Figure 6 - Minimum Mantel Clearances
Without Using Hood
Figure 7 - Minimum Mantel Clearances
When 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"
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
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111515-01J 11
INSTALLATION
Continued
Figure 8 - Minimum Fireplace Clearances If
Installed at Floor Level
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
Hearth
5"
Min.
Combustible
Material
14"
Min.
Combustible
Material
Noncombustible Material
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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).
Note: When used as a vented heater, ap-
pliance must be installed only in a solid-fuel
burning fireplace with a working flue and
constructed of noncombustible material.
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 31). This will insure
vented operation (see Figure 10). The damper
clamp will keep damper open. Installation in-
structions 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.
ROUND FLUES
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
Manufactured
Fireplace
Masonry Fireplace
Damper
Clamp Damper
Damper
Clamp
Damper
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INSTALLATION
Continued
WARNING: You must secure
not, heater will move when you
-
-
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 and ttings (not
provided) (if allowed by local codes)
• sealant (resistant to propane/LP gas, not
provided)
• electric drill with 3/16" drill bit (metal or
masonry as applicable)
• athead screwdriver
• pipe wrench
1. Apply pipe joint sealant lightly to male
threads of gas tting (not provided). Con-
nect 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 16).
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 base (see Figure 12). If
installing in a brick-bottom replace, mark
screw locations in mortar joint of bricks.
8. Drill holes at marked locations using 3/16"
drill bit.
9. Attach base assembly to replace oor
using two masonry screws (in hardware
package).
Figure 11 - Attaching Flexible Gas Hose
to Heater
Flexible Gas Hose (if
allowed by local codes)
Fitting
Figure 12 - Attaching Heater to Fireplace
Floor
Masonry Screw
Screw Holes in Base
HELD REMOTE CONTROL
Four AA batteries and three AAA batteries
are required to operate this heater with the
wireless hand-held remote control set. Four
AA batteries must be installed in the receiver
and three AAA batteries in the hand-held
remote control unit. Note: Only use alkaline
batteries.
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111515-01J 13
INSTALLATION
Continued
Figure 13 - Installing Batteries in
Receiver
Cover
Receiver
Slot
4 AA Batteries
Battery
Housing
Backup
Switch
CAUTION: Never connect
-
WARNING: Never connect
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 31.
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 15, page 14. Pointing the vent
down protects it from freezing rain or sleet.
1. Locate slot on battery cover of receiver
(see Figure 13). Firmly insert tool such as
a small screwdriver, butter knife, or dime
into the slot and lift up to remove cover.
2. Insert 4 AA batteries into receiver. Positive
and negative are marked inside receiver
casing. Note: Receiver will not function if
batteries are not installed correctly.
3. Slide tab on cover into receiver housing
and snap cover back into place.
Figure 14 - Installing Batteries in Remote
Control
Cover
Remote Control
3 AAA
Batteries
1. Remove remote cover (see Figure 14).
2. Insert 3 AAA batteries into remote control
(see Figure 14). Positive and negative
are marked inside remote control casing.
Note: Remote will not function if batteries
are not installed correctly.
3. Slide remote cover back into place.
www.desatech.com 111515-01J14
We recommend that you install a sediment
trap in supply line as shown in Figure 16.
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.
INSTALLATION
Continued
CAUTION: Use only new,
-
Installation must include an equipment shutoff
valve, union, and plugged 1/8" NPT tap. Lo-
cate NPT tap within reach for test gauge hook
up. NPT tap must be upstream from heater
(see Figure 16).
IMPORTANT: Install equipment shutoff valve
in an accessible location. The equipment
shutoff valve is for turning on or shutting off
the gas to the appliance.
Check your building codes for any special
requirements for locating equipment shutoff
valve to 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.
Propane/LP
Supply Tank
External Regulator
Figure 15 - External Regulator With Vent
Pointing Down
Vent
Pointing
Down
Pipe Cap Tee
Nipple Joint
* Purchase the optional CSA design-certied
equipment shutoff valve from your dealer. See
Accessories, page 31.
** Minimum inlet pressure for purpose of input
adjustment.
Figure 16 - Gas Connection
Gas Control
3" Min.
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)
www.desatech.com
111515-01J 15
INSTALLATION
Continued
CHECKING GAS CONNECTIONS
and connections, internal and
external to unit, for leaks after
WARNING: Never use an
-
CAUTION: Make sure exter-
-
der Connecting to Gas Supply,
1. Disconnect appliance with its appliance
main gas valve (control valve) and equip-
ment 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 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 noncorrosive leak detection
uid 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 17).
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 equip-
ment shutoff valve for natural gas or pro-
pane/LP supply to equipment shutoff valve
for propane/LP (see Figures 18 and 19).
Apply noncorrosive leak detection uid to
all joints. Bubbles forming show a leak.
4. Correct all leaks at once.
Open
Closed
Gas Meter
Equipment
Shutoff Valve
Gas Control
Valve Location
Figure 19 - Checking Gas Joints (Natural
Gas only)
Figure 17 - Equipment Shutoff Valve
Figure 18 - Checking Gas Joints
(Propane/LP only)
Gas Control
Valve Location
Propane/LP
Supply Tank
Equipment
Shutoff Valve
Equipment
Shutoff Valve
www.desatech.com 111515-01J16
CONNECTIONS
1. Open equipment shutoff valve (see Figure
17, page 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 to gas control (see Figures
18 or 19, page 15). Apply noncorrosive
leak detection uid to all joints. Bubbles
forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operation, page 17).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 19).
INSTALLING LOGS
-
CAUTION: After installa-
With the heater set to HI, check
-
It is very important to install the logs exactly
as instructed. Do not modify logs. Only use
logs supplied with heater.
1. Place rear log (log #1) behind burner on the
two pins on rear bracket (see Figure 20).
2. Place cutouts of middle log (log #2) on
burner as shown in Figure 21.
Figure 20 - Rear Log (Log #1) Placement
Figure 21 - Middle Log (Log #2)
Placement
Log #1
Log #2
Cutout
Cutout
Figure 22 - Placement of Front Logs
(Log #3 and Log #4)
Log #4
Grate
Prongs
Log #3
Peg
INSTALLATION
Continued
www.desatech.com
111515-01J 17
INSTALLATION
Continued
3. Place left front log (log #3) on grate prongs
as shown in Figure 22, page 16.
4. Place right front log (log #4) on peg of log
#3 and grate prongs as shown in Figure
22, page 16.
5. Place left crossover log (log #5) on pegs
of log #2 and #3 (see Figure 23). Place
middle crossover log (log #6) on pegs of
log #1 and #2 (see Figure 23). Place right
crossover log (log #7) on pegs of log #2
and #4 (see Figure 23).
6.
Slide control cover log (log #8) into
place between front logs #3 and #4 (see
Figure 24).
Figure 23 - Placement of Crossover Logs
(Logs #5, #6, and #7)
Log #5
Log #6
Log #7
Figure 24 - Control Cover Log (Log #8)
Placement
Log #8
OPERATION
FOR YOUR SAFETY
WARNING: If you do not fol-
low these instructions exactly,
-
WHAT TO DO IF YOU SMELL GAS
• Do not touch any electric switch; do
-
www.desatech.com 111515-01J18
LIGHTING
INSTRUCTIONS
WARNING
-
erate heater with doors closed,
-
-
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 highest 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.
come on automatically within
one minute when the control
1. STOP! Read the safety information on
page 17.
2. Make sure equipment shutoff valve is fully
open.
3. Remove control cover log (see Figure 25).
4. Set remote selector switch in the AUTO
position (see Figure 26).
5.
Press in and turn control knob clockwise
to the OFF position (see Figure 26).
6. 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, page 17. If you
don’t smell gas, go to the next step.
7. Press in and turn control knob counter-
clockwise to the PILOT position.
Press in control knob for ve (5) seconds
(see Figure 26).
Note: You may be running this heater
for the rst time after hooking up to gas
supply. If so, the control knob may need
to be pressed in for 30 seconds or more.
This will allow air to bleed from the gas
system.
8. With control knob pressed in, press and
release ignitor button. This will light pilot.
The pilot is attached to the rear of the front
burner. If needed, keep pressing ignitor
button until pilot lights.
O
F
F
P
I
L
O
T
O
N
Figure 25 - Control Knob (Shown in
the OFF Position) and Ignitor Button
Location
Control Knob
Ignitor ButtonControl Cover Log
AUTO MAN
Control Knob
Ignitor
Button
Figure 26 - Remote Selector Switch,
Control Knob and Ignitor Button
Remote Selector Switch
OPERATION
Continued
www.desatech.com
111515-01J 19
OPERATION
Continued
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.
9. 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.
10. Slightly push in and turn control knob
counterclockwise to the ON posi-
tion.
11. Press the on/off key on the remote control
to turn on appliance main burner. Wait at
least 5 seconds before setting desired
ame height.
12. Press the up or down key until the small
triangle is to the left of large ame icon
at the top of LCD display (see Figure 29,
page 20). Press the left or right key to set
the desired ame height.
13. Replace control cover log (see Figure 25,
page 18).
CAUTION: Do not try to ad-
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.
Figure 27 - Pilot (Propane/LP)
Ignitor
Electrode
Pilot Burner
Figure 28 - Pilot (Natural)
Ignitor
Electrode
Pilot Burner
TO TURN OFF GAS
Press on/off key on remote control and turn
control knob clockwise to the OFF
position (see Figure 26, page 18).
Press the on/off key on remote control or turn
control knob clockwise to the PILOT
position.
MANUAL LIGHTING
1. Follow steps 1 through 7 under Lighting
Instructions, page 18.
2. Depress control knob and light pilot with
match.
3. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob. Now follow steps 9
through 11 under Lighting Instructions in
column 1.
HAND-HELD
-
Lighting
Instructions
When the appliance and the remote control
are switched off, the house icon with the room
temperature will be displayed. When the re-
mote control is turned on, other icons will be
visible and the main burner of the appliance
will turn on.
1. Turn control knob clockwise to the
ON position (see Figure 26, page 18).
2. Press the ON button on remote control
(see Figure 29, page 20). Wait 5 seconds
to send a command to appliance.
Note: An acoustic signal will be heard that
conrms the reception of the command sent
from the remote control.
www.desatech.com 111515-01J20
OPERATION
Continued
INDICATION
To toggle between temperature degrees
Fahrenheit and Celsius perform the follow-
ing steps.
1. Press the up and down key until the small
triangle is to the left of the clock icon (see
Figure 29).
2. From time 0:00, press the left key 10
times. The display will then show the
transmitter address (frequency).
3. Press the right key to toggle from °F to °C
and vice versa.
4. Press the left key to exit this function.
SETTING FLAME HEIGHT
Press the up or down key until the small
triangle is to the left of large ame icon at the
top of LCD display (see Figure 29). Press
the left or right key to set the desired ame
height. Six ame levels are available from 1
(minimum) to 6 (maximum).
Press the up or down key until the small
triangle is to the left of the thermometer icon
(see Figure 29). Press the left or right key to
set the desired room temperature.
SETTING TIMER
Press the up or down key until the small
triangle is to the left of the clock icon (see
Figure 29). Press the left or right key to set
the desired sleep time. Maximum sleep time
is 90 minutes, in 15 minute increments. When
desired time is set, press the up or down
key to start the timer. When the desired time
has elapsed, the appliance will automatically
switch off.
CHILD SAFETY LOCK-OUT
To lock the remote control keys, press the
On/Off key then immediately press the up
key (see Figure 29). The lock-out function is
active when the lock icon is lit. Repeat key
sequence to unlock keys.
Figure 29 - Remote Control
Left and
Right Keys
Increase
and
Decrease
Set Points
On/Off
Button
Ther-
mometer
Icon
LCD Display
Room
Temp.
Display
(°F or °C)
Sleep
Timer
Display
Lock-Out
Indicator
Low
Battery
Indicator
Small Triangle
Icon (Function
Indicator)
Flame
Height
Indicator
Clock
Icon
Up and
Down
Keys
Select
Available
Functions
A battery icon will be displayed on the LCD
display when batteries are low in the remote
control (see Figure 29).
When the receiver detects a low battery
condition;
• Three acoustic "beeps" are generated from
the receiver
• Appliance is turned off and will go to the
maximum ame height
• Execution of commands is inhibited until
batteries are replaced
When batteries are low, it is not possible to
turn on the appliance with the remote control.
Appliance can be turned on or off manually
by setting the backup switch of the receiver to
MAN position (see Figure 13, page 13). Re-
mote control and receiver will restart normal
operation after batteries are replaced. See
Installing Batteries for Remote Receiver and
Hand Held Remote Control, page 12.
TIMEOUT
If appliance is turned on and no command is
sent to the receiver for 24 hours, appliance
will automatically shut down. Commands sent
after shutdown will be executed normally.
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