Desa CLD3924PTC, CLD3924NTC Owner's Operation And Instruction Manual

ROYAL ENGLISH OAK UNVENTED (VENT-FREE)
GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
Patent Pending
24" THERMOSTATICALLY-CONTROLLED MODELS
CLD3924PTC AND CLD3924NTC
WARNING: If the information in this manual is not
followed exactly, a re or explosion may result causing property damage, personal injury or loss of life.
— Do not store or use gasoline or other ammable
vapors and liquids in the vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• 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.
— Installation and service must be performed by a quali-
ed installer, service agency or the gas supplier.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
For more information, visit www.desatech.com
Safety .................................................................. 2
TABLE OF CONTENTS
Product Identication ........................................... 5
Local Codes......................................................... 5
Unpacking............................................................ 5
Product Features ................................................. 5
Air For Combustion and Ventilation ..................... 6
Installation ........................................................... 8
Operation ........................................................... 16
Inspecting Burners............................................. 18
Cleaning and Maintenance ................................ 18

SAFETY

Troubleshooting ................................................. 20
Optional Positioning of Thermostat Sensing Bulb ... 24
Specications .................................................... 25
Technical Service............................................... 26
Service Hints ..................................................... 26
Replacement Parts ............................................ 26
Accessories ....................................................... 27
Parts Central...................................................... 27
Parts .................................................................. 28
Warranty ............................................................ 32
WARNING: Improper
installation, adjustment,
alteration, service or main-
tenance can cause injury or property damage. Refer
to this manual for correct
installation and operation­al procedures. For assis-
tance or additional infor-
mation consult a qualied installer, service agency or the gas supplier.
WARNING: This ap-
pliance is for installation only in a solid-fuel burning
masonry or UL127 fac-
tory-built fireplace or in a listed ventless rebox enclosure. It is design-cer­tied for these installations
in accordance with ANSI
Z21.11.2. Exception: Do not install this appliance in a factory-built replace that
includes instructions stat-
ing it has not been tested or should not be used with unvented gas logs.
WARNING: This is an
unvented gas-red heat­er. It uses air (oxygen)
from the room in which
it is installed. Provisions for adequate combustion
and ventilation air must
be provided. Refer to Air for Combustion and Ven­tilation section on page 6
of this manual.
This appliance may be in-
stalled in an aftermarket,*
perma n ently locat e d, manufactured (mobile) home, where not prohib­ited by local codes. This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
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SAFETY
Continued
WARNING: This product
con tains an d/or gen erates
chemicals known to the State of California to cause cancer or
birth defects or other reproduc­tive harm.
IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, op­erate or service this replace. Improper use of this replace can cause serious injury or death from burns, re, explo­sion, electrical shock and carbon monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: 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 oth-
ers. These include pregnant women, people with heart or lung disease or anemia, those under the inuence of alcohol and those at
high altitudes. Natural and Propane/LP Gas: 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: Any change to
this heater or its controls can
be dangerous.
WARNING: Do not use a
blower insert, heat exchanger insert or other accessory not ap­proved for use with this heater.
WARNING: Do not allow fans
to blow directly into the replace. Avoid any drafts that alter burner ame patterns. Ceiling fans can create drafts that alter burner ame patterns. Altered burner patterns can cause sooting.
Due to high temperatures, the appliance should be located out of trafc and away from furniture and draperies.
Do not place clothing or other ammable material on or near the appliance. Never place any objects on the heater.
Heater base assembly becomes very hot when running heater. Keep children and adults away from hot surface to avoid burns or clothing ignition. Heater
will remain hot for a time after
shutdown. Allow surface to cool before touching.
Carefully supervise young chil-
dren when they are in the room
with heater.
You must operate this heater with a replace screen in place. Make sure replace screen is closed before running heater.
Keep the appliance area clear and free from combustible ma­terials, gasoline and other am­mable vapors and liquids.
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SAFETY
Continued
1. This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with
other gases.
2. Do not place propane/LP supply tank(s) inside any structure. Locate propane/LP supply tank(s) outdoors (propane/LP units only).
3. To prevent performance problems, the
use of a propane/LP tank of less than 100 lbs. capacity is not recommended (propane/LP units only).
4. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch; do not
use any phone in your building
• immediately call your gas supplier from
a neighbor ’s phone. Follow the gas
supplier’s instructions
• if you cannot reach your gas supplier,
call the re department
5. This heater shall not be installed in a bedroom or bathroom.
6. Do not burn solid-fuel in a masonry or
UL127 factory-built replace in which a
vent-free room heater is installed.
7. 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 qualied 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.
8. If replace has glass doors, never operate this heater with glass doors closed. If you operate heater with doors closed, heat buildup inside replace will cause glass to
burst. Make sure there are no obstructions
across openings of replace.
9. This log heater is designed to be smoke-
less. If logs ever appear to smoke, turn off heater and call a qualied service person.
Note: During initial operation, slight smok­ing could occur due to log curing and heater burning manufacturing residues.
10. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance, page 18.
11. Before using furniture polish, wax, carpet cleaner or similar products, turn heater off. If heated, the vapors from these products may create a white powder residue within burner box or on adjacent walls or furniture.
12. This heater needs fresh, outside air 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 20.
13. Do not run heater
• where ammable liquids or vapors are
used or stored
• under dusty conditions
14. Do not use this heater to cook food or burn paper or other objects.
15. Do not use heater if any part has been ex-
posed to or under water. Immediately call a qualied service technician to inspect
the room heater and to replace any part of the control system and any gas control
which has been under water.
16. Do not operate heater if any log is broken. Do not operate heater if a log is chipped
(dime-sized or larger).
17. Turn heater off and let cool before servic-
ing. Only a qualied service person should
service and repair heater.
18. Operating heater above elevations of
4,500 feet could cause pilot outage.
19. Provide adequate clearances around air openings.
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PRODUCT
IDENTIFICATION
Ignitor
Control Knob
Figure 1 - Yellow Flame Vent-Free Gas Log
Heater
Log Set

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.
National Fire Protection Association, Inc.
Note: Where listed vented decorative logs are required, thermostat models are not permitted.
State of Massachusetts: The installa­tion 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.
1430 Broadway
New York, NY 10018
Batterymarch Park
Quincy, MA 02269

UNPACKING

CAUTION: Do not remove the
data plates from the grate as­sembly. The data plates contain important warranty and safety information.
1. Remove logs and heater base assembly from carton.
Note: Do not pick up heater base assem-
bly by burners. This could damage heater. Always handle base assembly by grate.
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

OpERATION
This heater is clean burning. It requires no outside venting. There is no heat loss out a vent or up a chimney. Heat is generated by
realistic, dancing yellow ames. This heater is designed for vent-free operation with ue
dampe r clo sed. It has b een 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.
SAFETY pILOT
This heater has a pilot with an Oxygen Deple­tion Sensing (ODS) safety shutoff system. The ODS/pilot is a required feature for vent-free room heaters. The ODS/pilot shuts off the heater if there is not enough fresh air.
pIEzO IGNITION SYSTEM
This heater has a piezo ignitor. This system re­quires no matches, batteries or other sources
to light heater.
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AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall
not be installed in a room or space unless the required volume of indoor combustion air is provided by the method described in the
National Fuel Gas Code, ANSI Z223.1/NFPA 54, the International Fuel Gas Code, or applicable
local codes. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.
Today’s homes are built more energy efcient 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.
pROVIDING ADEQUATE VENTILATION
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 classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space The information on pages 6 through 8 will help
you classify your space and provide adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and windows
may provide enough fresh air for combustion
and ventilation. However, in buildings of un-
usually tight construction, you must provide
additional fresh air.
Unusually tight construction is dened as
construction where:
a. walls and ceilings exposed to the out-
side atmosphere have a continuous water vapor retarder with a rating of one perm (6x10 less with openings gasketed or sealed
and
b. weather stripping has been added on
openable windows and doors and
c. caulking or sealants are applied to
areas such as joints around window and door frames, between sole plates and oors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical and gas lines and at other openings.
If your home meets all of the three criteria
above, you must provide additional fresh air.
See Ventilation Air From Outdoors, page 8. If your home does not meet all of the three
criteria above, proceed to Determining Fresh-Air Flow For Heater Location.
Conned Space and Unconned Space
The National Fuel Gas Code ANSI Z223.1/ NFPA 54 denes a conned 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 ag-
gregate input rating of all appliances installed
in that space and an unconned space as a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw)
of the aggregate input rating of all appliances installed in that space. Rooms communicating
directly with the space in which the appliances are installed*, through openings not furnished with doors, are considered a part of the un­conned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation grills between them.
-11
kg per pa-sec-m2) or
DETERMINING FRESH-AIR FLOW FOR FIREpLACE LOCATION
Determining if You Have a Conned or Unconned Space
Use this work sheet to determine if you have a conned or unconned space.
Space: Includes the room in which you will install replace plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.
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120890-01D6
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"
AIR FOR COMBUSTION
AND VENTILATION
Continued
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 the space can
support)
_______ Btu/Hr (actual amount of Btu/Hr
used)
Example: 51,200 Btu/ Hr (ma ximum the
space can support)
71,500 Btu/Hr (actual amount of
Btu/Hr used)
The space in the example is a conned 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:
40,000 31,500 71,500
A. Rework worksheet, adding the space of an
adjoining room. If the extra space provides an
unconned 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, page 8.
C. Install a lower Btu/Hr replace, if lower Btu/Hr
size makes room unconned.
If the actual Btu/Hr used is less than the maxi-
mum Btu/Hr the space can support, the space is an unconned space. You will need no additional
fresh air ventilation.
WARNING: If the area in which
the heater may be operated does not meet the required volume for indoor combustion air, combus­tion and ventilation air shall be provided by one of the methods described in the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, the International Fuel Gas Code,
or applicable local codes.
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining
unconfined space. When ventilating to an
adjoining unconned 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). Fol­low the National Fuel Gas Code ANSI Z223.1/
NFPA 54 Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
Figure 2 - Ventilation Air from Inside Building
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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
AIR FOR COMBUSTION
AND VENTILATION
Continued
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two perma­nent openings: one within 12" of the ceiling and one within 12" of the 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 3 - Ventilation Air from Outdoors

INSTALLATION

NOTICE: This heater is intended
for use as supplemental heat. Use this heater along with your primary heating system. Do not install this heater as your pri­mary heat source. If you have a central heating system, you may run system’s circulating blower while using heater. This will help circulate the heat throughout the house. In the event of a power outage, you can use this heater as your primary heat source.
vice person must install heater. Follow all local codes.
WARNING: A qualied ser-
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NOTICE: State or local codes may
only allow operation of this appli­ance in a vented conguration. Check your state or local codes.
WARNING: 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 qualified 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.
WARNING: Seal any fresh air vents or ash clean-out doors
located on oor or wall of re­place. If not, drafting may cause pilot outage or sooting. Use a heat-resistant sealant. Do not seal chimney ue damper.
WARNING: Never install the heater
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing or other ammable objects are less than 36" from front or 42" from top of heater. For side clearances see Figure 4, page 9
• in high trafc areas
• in windy or drafty areas
120890-01D8
INSTALLATION
Continued
CAUTION: This heater cre-
ates warm air currents. These
currents move heat to wall sur-
faces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater where impurities (such as, but not limited to, tobacco smoke, aromatic candles, cleaning u­ids, oil or kerosene lamps, etc.) in
the air exist, may discolor walls
or cause odors.
IMPORTANT: Vent-free heaters add moisture
to the air. Although this is benecial, 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.
CHECK GAS TYpE
Use only the correct gas type (natural or pro­pane/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.
WARNING: This appliance is equipped for either natural gas or propane/LP gas but not both. Gas type is indicated on the rat­ing plate. Field conversion is not permitted.
LOG SIzING REQUIREMENTS
Minimum Firebox Size
Height Front
Depth
17" 14" 28" 21"
*Measured at 14" Depth
Carefully follow the instructions below. This will ensure safe installation into a masonry, UL127-listed manufactured replace or certi­ed vent-free rebox.
MINIMUM CLEARANCES FOR SIDE COMBUSTIBLE MATERIAL, SIDE WALL AND CEILING
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".
Example
Rear Width Width*
INSTALLATION AND CLEARANCES
(Vent-Free Operation Only)
WARNING: Maintain the
*
minimum clearances. If you can, provide greater clearances from oor, ceiling and adjoining wall.
MINIMUM FIREpLACE CLEARANCE
TO COMBUSTIBLE MATERIALS
Side Wall 16", Ceiling 42", Front 36"
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*Minimum 16" from Side Wall
Figure 4 - Minimum Clearance for
Combustible to Wall
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
2
1
/2"
6"
8"
10"
INSTALLATION
Heat Resistant Material
(A)
Continued
MINIMUM NONCOMBUSTIBLE MATERIAL CLEARANCES
If Not Using Mantel
Note: If using a mantel, proceed to If Using Mantel. 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 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. See Figure 5 for
minimum clearances.
Noncombustible
Material
Distance (A)
12" or more Noncombustible material
Between 8" Install replace hood and
Less than 8" Noncombustible mate-
Requirements for Safe
Installation
okay.
12" accessory (GA6050,
GA6052 or GA6053 see
Accessories, page 27).
rial 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.
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. If noncombustible material is less than 12", you must install the replace hood acces-
sory. Even if noncombustible material is more
than 12", you may need the hood accessory to deect heat away from your mantel shelf. See
Figures 5 and 6 and Figure 7 on page 11 for minimum clearances.
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.
Determining Minimum Mantel Clearance
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,
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Marble, Tile, etc.) Above Fireplace
Figure 6 - Minimum Mantel Clearances
Without Using Hood
Determining Minimum Mantel Clearance when Using a Hood
If minimum clearances in Figure 6 are not
met, you must have a hood. When using a
hood there are still certain minimum mantel
clearances required. Follow minimum clear­ances shown in Figure 7, page 11, when
using a hood.
120890-01D10
INSTALLATION
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
14" Min.
Combustible Material
Noncombustible Material
Hearth
5" Min.
Combustible Material
Continued
NOTICE: Surface temperatures of adjacent walls and mantels be­come hot during operation. Walls and mantels above the rebox may become hot to the touch. If installed properly, these tem­peratures meet the requirement of the national product standard.
Follow all minimum clearances
shown in this manual.
NOTICE: If your installation does not meet the minimum clear­ances shown, you must do one
of the following:
• raise the mantel to an accept-
able height
• remove the mantel
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
INSTALLING HEATER BASE ASSEMBLY
CAUTION: Do not remove the
data plates attached to the heater base assembly. The data plates contain important warranty and safety information.
WARNING: You must secure
this heater to replace oor. If
not, heater will move when you
adjust controls. Moving heater
Figure 7 - Minimum Mantel Clearances
When Using Hood
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).
may cause a gas leak.
WARNING: If installing in a sunken replace, special care is needed. You must raise the replace oor to allow access to heater control panel. This will in­sure adequate air ow and guard against sooting and controls be­ing damaged. Raise replace oor with noncombustible material.
120890-01D 11
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Make sure material is secure.
INSTALLATION
Continued
CAUTION: Do not pick up heater base assembly by the burner. This could damage heater. Only handle base as­sembly by grates.
IMPORTANT: Make sure heater burners are
level. If heater is not level, heater will not work
properly. 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 24.
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. Apply pipe joint sealant lightly to male
threads of tting to be threaded into gas regulator. Connect approved exible gas
hose to gas regulator of heater (see Fig­ure 10).
IMPORTANT: Hold gas regulator with
wrench when connecting flexible gas
hose.
2. Lo cate masonry screws in hardware
package.
3. Position heater base assembly in re-
place.
4. Place logs in their proper position on heater
base (see Installing Logs, page 15).
5. Center heater base and logs front-to-front
and side-to-side in replace.
Fitting
Flexible Gas Hose
(if allowed by local codes)
Figure 10 - Attaching Flexible Gas Hose
to Heater Gas Regulator
Heater Gas Regulator
6. Carefully remove logs without moving
heater base.
7. Mark screw locations through holes in
mounting brackets (see Figure 11). If
installing in a brick-bottom replace, mark screw locations in mortar joint of bricks.
8. Remove heater base from replace.
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) (see Figure 11).
Masonry
Screw
Mounting Bracket
Figure 11 - Attaching Base Assembly to
Fireplace Floor
CONNECTING TO GAS SUppLY
WARNING: This appliance requires a 1/2" NPT (National Pipe Thread) inlet connection to the pressure regulator.
WARNING: A qualied ser­vice person must connect heater to gas supply. Follow all local codes.
CAUTION: Never connect
propane/LP heater directly to the propane/LP supply. Propane/LP heaters require an external regu­lator (not supplied). Install the external regulator between the heater and propane/LP supply.
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120890-01D12
INSTALLATION
Continued
WARNING: For natural gas
units, never connect heater to
private (non-utility) gas wells. This gas is commonly known as wellhead gas.
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-certied equipment shutoff
valve with 1/8" NPT tap is an acceptable al-
ternative to test gauge connection. Purchase
the optional CSA design-certied equipment
shutoff valve from your dealer.
For propane/LP gas, installer must supply an external regulator. 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 pressure, heater regulator dam­age could occur. Install external regulator with vent pointing down as shown in Figure 12. Pointing vent down protects it from freezing
rain or sleet.
CAUTION: Use only new,
black iron or steel pipe. Inter­nally-tinned copper tubing may be used in certain areas. Check your local codes. Use pipe of 1/2" diameter or greater to allow proper gas volume to heater. If pipe is too small, undue loss of volume will occur.
Installation must include an equipment shutoff
valve, union and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up.
NPT tap must be upstream from heater (see Figure 13).
IMPORTANT: Install equipment shutoff valve in an accessible location. Main gas valve is for turning on or shutting off gas to 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.
WARNING: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Propane/LP Supply Tank
External Regulator
Vent Pointing
Down
Figure 12 - External Regulator With Vent
Natural
From Gas Meter
(5" W.C.** to
10.5" W.C.
Pressure)
Propane/LP
From External Regulator
(11" W.C.** to 14" W.C.
Pressure
* Purchase optional CSA design-certied
equipment shutoff valve from your dealer. ** Min. inlet pressure for purpose of input
adjustment.
Pointing Down
CSA Design-Certied
Equipment Shutoff Valve
With 1/8" NPT Tap*
Gas Regulator
3" Min.
Tee Cap Pipe Joint Nipple
Sediment Trap
Figure 13 - Gas Connection
Approved Flexible Gas Hose (if
allowed by
local codes)
120890-01D 13
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INSTALLATION
Continued
We recommend that you install sediment trap
in supply line as shown in Figure 13, page
13. Locate sediment trap where it is within
reach for cleaning. Install in piping system
between fuel supply and heater. Locate sedi­ment trap where trapped matter is not likely to freeze. A sediment trap traps moisture and
contaminants. This keeps them from going into heater controls. If sediment trap is not
installed or is installed wrong, heater may
not run properly.
CAUTION: Avoid damage to regulator. Hold gas regulator with wrench when connecting it to gas piping and/or ttings.
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping
and connections , internal and external to unit, for leaks after
installing or servicing. Correct all leaks at once.
WARNING: Never use an
open ame to check for a leak. Apply a commercial leak de­tection solution to all joints. Bubbles forming show a leak. Correct all leaks at once.
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 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.
Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 14).
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 (natural gas) or propane/LP supply to equipment
shutoff valve (see Figure 15 or Figure 16,
page 15). Apply a commercial leak detec­tion solution to all joints. Bubbles forming
show a leak.
4. Correct all leaks at once.
Equipment Shutoff Valve
Open
CAUTION: For propane/LP units, make sure external regula­tor has been installed between propane/LP supply and heater. See guidelines under Connect- ing to Gas Supply, page 12.
pRESSURE TESTING GAS SUppLY pIpING SYSTEM Test pressures In Excess Of 1/2 pSIG
(3.5 kPa)
1. Disconnect appliance with its appliance
main gas valve (control valve) and equip­ment shutoff valve from gas supply piping. Pressures in excess of 1/2 psig will dam­age heater regulator.
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Closed
Figure 14 - Equipment Shutoff Valve
Propane/LP Supply Tank
Figure 15 - Checking Gas Joints
Equipment Shutoff Valve
Control Valve Location
(Propane/LP Gas Only)
120890-01D14
INSTALLATION
Continued
Equipment Shutoff Valve
Gas Meter
Control Valve Location
Figure 16 - Checking Gas Joints
(Natural Gas Only)
Pressure Testing Heater Gas
Connections
1. Open equipment shutoff valve (see Figure
14, page 14).
2. Open main gas valve located on or near gas meter for natural gas or open pro­pane/LP supply tank valve.
3. Make sure control knob of heater is in the OFF position.
4. Check all joints from gas meter (natural gas) or propane/LP supply to equipment
shutoff valve (see Figure 15, page 14
or Figure 16). Apply a commercial leak detection solution to all joints. Bubbles
forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operation, page 16. Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 17.
INSTALLING LOGS
CAUTION: After installa-
tion and periodically thereafter, check to ensure that no ame comes in contact with any log. With the heater set to High, check to see if ames contact any log. If so, reposition logs according to the log installation instructions in this manual. Flames contact­ing logs will create soot.
It is very important to install these logs exactly as instructed. Do not modify logs. Only use
logs supplied with heater.
1. Place main log assembly (#1) onto base.
Cutout on front right will t over burner
(see Figure 17). Make sure back of log assembly is resting on back tabs of base.
There are 2 small notches on log that t
onto front tabs.
2. Place front log onto grate. Log is notched
to sit over grate (see Figure 18, page
16). Position holes on bottom of log over
shoulder screws on base.
3. Place crossover log onto pins on main log
and front log (see Figure 19, page 16).
Note: Nontextured end of crossover log
faces back of rebox and will not be seen
from front of log set.
4. Add lava rock around base of heater if desired. Do not place any lava rock on logs or burner.
Notch for Front Tab
Main Log Assembly
Cutout Fits Over Burner
WARNING: Failure to posi­tion the parts in accordance with these diagrams or failure to use only parts specically
Shoulder
Screw
approved with this heater may result in property damage or personal injury.
Front Tab
Notch for Front Tab
Figure 17 - Installing Main Log (#1)
120890-01D 15
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Front Tab
Sits on Back Tab
Back Tab
Burner
INSTALLATION
Continued
Front Log
Grate
Figure 18 - Installing Front Log (#2)
Nontextured End
Pin Crossover Log
Figure 19 - Installing Crossover Log (#3)

OPERATION

FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not fol-
low these instructions exactly,
a re or explosion may result causing property damage, per­sonal injury or loss of life.
A. This appliance has a pilot which must
be ligh ted by hand. W hen lightin g the pilot, follow these instructions exactly.
B. BEFORE LIGHTING smell all around
the appliance area for gas. Be sure to smell next to the oor because some gas is heavier than air and will settle on the oor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the re department.
C. Use only your hand to push in or turn
the gas control knob. Never use tools. If the knob will not push in or turn by hand, don’t try to repair it, call a quali­ed service technician 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 qualied 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
• If replace has glass doors, never operate this heater with glass doors closed. If you op-
erate heater with doors closed,
heat buildup inside replace will cause glass to burst. Make sure there are no obstructions across openings of replace.
• You must operate this heater with a replace screen in place. Make sure replace screen is closed before running heater.
NOTICE: During initial operation of new heater, burning logs will give off a paper-burning smell. Orange ame will also be present. Open damper or window to vent smell. This will only last a few hours.
Note: Home owners generally prefer to oper­ate their heater with chimney damper closed. This will put all of the heat into room. However,
there may be times you will desire full ames of HI heat setting but will nd heat output
excessive. You can open chimney damper (if you have one) fully or partially to release some heat.
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120890-01D16
OPERATION
LO
HI
OFF
Pilot
Continued
8. Turn control knob counterclockwise
to desired heating level. The burners should light. Set control knob to any heat
level between HI and LO.
WARNING: Damper handle will be hot if heater has been running.
1. STOP! Read safety information, page 16.
2. Make sure equipment shutoff valve is fully open.
3. Turn control knob clockwise to OFF position.
9. To leave pilot lit and shut off burners only, turn control knob clockwise to PILOT position.
CAUTION: Do not try to ad-
just heating levels by using the equipment shutoff valve.
Thermocouple
Ignitor Electrode
4. Wait ve (5) minutes to clear out any gas. Then smell for gas, including near oor. If you smell gas, STOP! Follow “B” in safety
Pilot Burner
information, page 16. If you don’t smell gas, go to next step.
5. Turn control knob counterclockwise
to PILOT position. Press in control knob
for ve (5) seconds (see Figure 20).
Note: You may be running this heater
for the rst time after hooking up to gas
supply. If so, control knob may need to be pressed in for 30 seconds or more. This will allow air to bleed from gas system.
• If control knob does not pop out when
released, contact a qualified service
person or gas supplier for repairs.
6. With control knob pressed in, press and release ignitor button. This will light pilot. Pilot is attached to front burner. If needed,
keep pressing ignitor button until pilot lights.
Note: If pilot does not stay lit, contact a
qualied service person or gas supplier
for repairs. Until repairs are made, light pilot with match. To light pilot with match, see Manual Lighting Procedure.
7. Keep control knob pressed in for 30 sec­onds after lighting pilot. After 30 seconds,
release control knob.
Note: If pilo t goes out, repe at step s
3 through 7. This heater has a safety interlock system. Wait one (1) minute for system to reset before lighting pilot again.
1. Turn control knob clockwise to OFF position.
2. Close equipment shutoff valve (see Figure
14, page 14).
Thermostat control knob can be set to any
comfort level between HI and LO. Thermo­stat will gradually modulate heat output and ame height from higher to lower settings or pilot, in order to maintain comfort level you select. The ideal comfort setting will vary
by household depending upon amount of
space to be heated, output of central heating system, etc.
Note: Selecting HI setting with control knob will cause burner to remain fully on, without modulating down in most cases.
Figure 21 - Pilot
TO TURN OFF GAS
TO AppLIANCE
THERMOSTAT CONTROL
OpERATION
MANUAL LIGHTING
pROCEDURE
1. Follow steps 1 through 5 under Lighting Instructions, column 1.
2. Depress control knob and light pilot with
match.
3. Keep control knob pressed in for 30 sec-
Ignitor Button
Control Knob
Figure 20 - Control Knob and Ignitor
Button Location
120890-01D 17
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onds after lighting pilot. After 30 seconds, release control knob. Now follow step 8 under Lighting Instructions, column 1.

INSPECTING BURNERS

Check pilot ame pattern and burner ame
patterns often.
pILOT FLAME pATTERN
Figure 22 shows a correct pilot ame pattern. Figure 23 shows an incorrect pilot ame pat­tern. Incorrect pilot ame is not touching ther­mocouple. This will cause the thermocouple to cool. When thermocouple cools, heater will shut down.
If pilot ame pattern is incorrect, as shown
in Figure 23
• turn heater off (see To Turn Off Gas to Ap­pliance, page 17
• see Troubleshooting, page 20
Note: Pilot ame on natural gas units will have a slight curve, but ame should be blue and
have no yellow or orange color.
Pilot Burner
Thermocouple
Figure 22 - Correct Pilot Flame Pattern
Thermocouple
Pilot Burner
Figure 23 - Incorrect Pilot Flame Pattern
BURNER pRIMARY AIR HOLES
Air is drawn into burner through holes in t­ting at entrance to burner. These holes may
become blocked with dust or lint. Periodically
inspect these holes for any blockage and
clean as necessary. Blocked air holes will
create soot.
MAIN BURNER
Periodically inspect all burner ame holes with heater running. All slotted burner ame holes should be open with yellow ame pres­ent. All round burner ame holes should be open with a small blue ame present. Some burner ame holes may become blocked by debris or rust, with no ame present. If so, turn off heater and let cool. Remove blockage, blocked burner ame holes will create soot.

CLEANING AND MAINTENANCE

WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep control areas, burner and circu­lating air passageways of heater clean. Inspect these areas of heater before each use. Have heater inspected yearly by a qualied service person. Heater may need more frequent clean­ing due to excessive lint from carpeting, bedding material, pet hair, etc.
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WARNING: Failure to keep the primary air opening(s) of the burner(s) clean may result in sooting and property damage.
ODS/pILOT AND BURNER
Use a vacuum cleaner or small, soft bristled
brush to clean.
BURNER INjECTOR HOLDER AND pILOT AIR INLET HOLE
The primary air inlet holes allow the proper amount of air to mix with the gas. This pro­vides a clean burning ame. Keep these holes clear of dust, dirt and lint. Clean these air inlet
holes prior to each heating season. Blocked
air holes will create soot. We recommend that
you clean the unit every three months during operation and have heater inspected yearly
by a qualied service person.
120890-01D18
CLEANING AND MAINTENANCE
Continued
We also recommend that you keep burner tube and pilot assembly clean and free of dust and dirt. To clean these parts we recom­mend using compressed air no greater than
30 PSI. Your local computer store, hardware
store or home center may carry compressed
air in a can. If using compressed air in a can, please follow directions on can. If you don’t follow directions on can, you could damage
pilot assembly.
1. Shut off unit, including pilot. Allow unit to
cool for at least thirty minutes.
2. Inspect burner, pilot and primary air inlet
holes on injector holder for dust and dirt (see Figure 24).
3. Blow air through ports/slots and holes in
burner.
4. Check injector holder located at end of burner tube again. Remove any large
particles of dust, dirt, lint or pet hair with a soft cloth or vacuum cleaner nozzle.
5. Blow air into primary air holes on injector
holder.
6. In case any large clumps of dust have now been pushed into burner, repeat steps 3
and 4.
Clean pilot assembly also. A yellow tip on pilot ame indicates dust and dirt in pilot assembly. There is a small pilot air inlet hole about 2" from where pilot ame comes out of pilot as­sembly (see Figure 25). With unit off, lightly blow air through air inlet hole. You may blow through a drinking straw if compressed air is
not available.
Injector Holder (May Be Brass or Aluminum Depending on Model)
Pilot Assembly
Pilot Air Inlet Hole
Figure 25 - Pilot Inlet Air Hole
LOGS
• If you remove logs for cleaning, refer to Installing Logs, page 15, to properly replace
logs.
• Replace log(s) if broken or chipped (dime­sized or larger).
BURNER pRIMARY AIR HOLES
Air is drawn into burner through the 8 holes in brass tting at entrance to burner. These holes may become blocked with dust or lint.
Periodically inspect these holes for any block­age and clean as necessary. Blocked air holes
will create soot.
MAIN BURNER
Periodically inspect all burner ame holes with heater running. All slotted burner ame holes should be open yellow ame present. All round burner ame holes should be open with a small blue ame present. Some burner ame holes may become blocked by debris or rust, with no ame present. If so, turn off heater and let cool. Remove blockage, blocked burner ame holes will create soot.
Burner Tube
Primary Air Inlet Holes (Shape of Holes May Vary by Model)
Figure 24 - Injector Holder On Outlet
120890-01D 19
Burner Tube
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TROUBLESHOOTING

WARNING: Turn off and unplug heater and let cool before servicing.
Only a qualied service person should service and repair heater.
CAUTION: Never use a wire, needle or similar object to clean
ODS/pilot. This can damage ODS/pilot unit.
Note: All troubleshooting items are listed in order of operation.
OBSERVED pROBLEM
When ignitor button is pressed,
there is no spark at ODS/ pilot
pOSSIBLE CAUSE
1. Ignitor electrode not con­nected to ignitor cable
2. Ignitor cable pinched or
wet
3. Piezo ignitor nut is loose
4. Broken ignitor cable
5. Bad piezo ignitor
6. Ignitor electrode broken
7. Ignitor electrode positioned
wrong
REMEDY
1. Reconnect ignitor cable
2. Free ignitor cable if pinched by a ny meta l or tubing.
Keep ignitor cable dry
3. Tighten nut holding piezo
ignitor to base panel of log set. Nut is located behind base panel
4. Replace ignitor cable
5. Replace piezo ignitor
6. Replace pilot assembly
7. Replace pilot assembly
When ignitor button is pressed,
there is spark at ODS/pilot but no ignition
1. Gas supply turned off or equipmen t shutoff valve closed
2. Control knob not in PILOT position
3. Control knob not pressed in
while in PILOT position
4. Air in gas lines when in-
stalled
5. Depleted gas supply (pro­pane/LP only)
6. ODS/pilot is clogged
7. Gas regulator setting is not correct
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1. Turn on gas supply or open equipment shutoff valve
2. Turn control knob to PILOT position
3. Press in control knob while
in PILOT position
4. Co nti nue hol din g d own
control knob. Repeat ignit­ing oper ation until air is removed
5. Contact local propane/LP gas company
6. Clean ODS/pilot (see Clean- ing and Maintenance, page
18) or replace ODS/pilot assembly
7. Replace gas regulator
120890-01D20
OBSERVED pROBLEM
ODS/pilot lights but flame
goes out when control knob
is released
TROUBLESHOOTING
Continued
pOSSIBLE CAUSE
1. Con t r ol k n ob no t ful l y pressed in
2. Control knob not pressed in long enough
3. Safety interlock system has been triggered
4. Equipment shutoff valve not fully open
5. Pilot flame not touching
thermocouple, which al­lows thermocouple to cool, causing pilot ame to go
out. This problem could be caused by one or both of
the following:
A) Low gas pressure
B) Dirty or partially clogged
ODS/pilot
6. Thermocouple connection loose at control valve
7. Thermocouple damaged
8. Control valve damaged
REMEDY
1. Press in control knob fully
2. After ODS/pilot lights, keep
control knob pressed in 30 seconds
3. Wait one minute for safety interlock system to reset. Repeat ignition operation
4. Fully open equipment shut­off valve
5. A) Contact local natural or propane/LP gas company
B) Clean ODS/pilot (see
Cleaning and Maintenance,
page 18) or replace ODS/ pilot assembly
6. Hand tighten until snug,
then tighten 1/4 turn more
7. Replace pilot assembly
8. Replace control valve
Burner does light after ODS/ pilot is lit
Delayed ignition of burner
Burner backring during com­bustion
120890-01D 21
1. Burner orice clogged
2. Inlet gas pressure is too
low
1. Manifold pressure is too
low
2. Burner orice clogged
1. Burner orice is clogged or
damaged
2. Damaged burner
3. Gas regulator defective
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1. Clean burner (see Cleaning and Maintenance, page 18)
or replace burner orice
2. Contact loca l natural or propane/LP gas company
1. Contact loca l natural or propane/LP gas company
2. Clean burner (see Cleaning
and Maintenance, page 18) or replace burner orice
1. Clean burner (see Cleaning and Maintenance, page 18)
or replace burner orice
2. Replace damaged burner
3. Replace gas regulator
OBSERVED pROBLEM
Slight smoke or odor during initial operation
TROUBLESHOOTING
Continued
pOSSIBLE CAUSE
1. Not enough air
2. Gas regulator defective
3. Residues from manufac­turing processes and logs curing
REMEDY
1. Check burner for dirt and
de b ris . If fo u nd, cl e an
burner (see Cleaning and Maintenance, page 18)
2. Replace gas regulator
3. Problem will stop after a few
hours of operation
Moisture/condensation no-
ticed on windows
Heater produces a whistling noise when burner is lit
White powder residue forming within burner box or on adja­cent walls or furniture
Heater produces a clicking/ ticking noise just after burner is lit or shut off
1. Not enough combustion/ ventilation air
1. Turning control knob to HI
positio n whe n burner is
cold
2. Air in gas line
3. Air passageways on heater
blocked
4. Dirty or partially clogged
burner orice
1. When heated, vapors from furniture polish, wax, carpet cleaners, etc. may turn into a white powder residue
1. Met al exp a ndi ng whi l e heating or contracting while
cooling
1. Refer to Air for Combustion and Ventilation require­ments (page 6)
1. Turn control knob to LO
position and let warm up
for a minute
2. Operate burner until air is removed from line. Have gas line checked by local natural or propane/LP gas company
3. Observe minimum instal­lat i on clea r anc e s (s ee page 9)
4. Clean burner (see Cleaning
and Maintenance, page 18) or replace burner orice
1. Turn heater off when us­ing furniture polish, wax,
carpet cleaners or similar products
1. This is normal with most
heaters. If noise is exces­sive, contact qualied ser­vice person
www.desatech.com
120890-01D22
TROUBLESHOOTING
Continued
WARNING: If you smell gas
• Shut off gas supply.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Fol­low the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the re department.
Operating heater where impurities in air exist may create odors. Cleaning supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles, etc., create fumes. These fumes may mix with combustion air and create odors. These odors will disappear over time.
OBSERVED pROBLEM
Heater produces unwanted
odors
Heater shuts off in use (ODS operates)
Gas odor even when control
knob is in OFF position
Gas odor during combustion
pOSSIBLE CAUSE
1. Heater burning vapors from
paint , hair spra y, glue s, cleaners, chemicals, new carpet, etc. (See IMPOR-
TANT statement above)
2. Low fuel supply (propane/
LP only)
3. Gas leak. See Warning
statement above
1. No t eno ug h fresh air i s available
2. Low line pressure
3. O D S / p i l o t i s p a rtially clogged
1. Gas leak. See Warning
statement above
2. Control valve defective
1. Forei gn matter b etween
control valve and burner
2. Gas leak. See Warning
statement above
REMEDY
1. Open window and venti­late room. Stop using odor
ca usi ng prod ucts wh ile
heater is running
2. Rell supply tank (propane/
LP only)
3. Locate and correct all leaks (see Checking Gas Con-
nections, page 14)
1. Open window and/or door
for ventilation
2. Contact loca l natural or propane/LP gas company
3. C lean O D S / pilot ( s e e
Cleaning and Maintenance,
page 18)
1. Locate and correct all leaks (see Checking Gas Con- nections, page 14)
2. Replace control valve
1. Take apart gas tubing and remove foreign matter
2. Locate and correct all leaks (see Checking Gas Con- nections, page 14)
Log set cycles to pilot, but room temperature drops to a lower
than ideal level before log set comes back on
120890-01D 23
1. Thermostat sensing bulb needs to be repositioned
www.desatech.com
1. Repo s i t ion th e r m ostat sensing bulb (see Optional
Positioning of Thermostat Sensing Bulb, page 24
OPTIONAL POSITIONING OF THERMOSTAT
SENSING BULB
FOR MASONRY AND FACTORY­BUILT METAL FIREpLACE
If your log set cycles to pilot, but room tem­perature drops to a lower than ideal comfort level before log set comes back on, you may want to reposition thermostat sensing bulb.
Thermostat sensing bulb is located near gas valve assembly on mounting bracket. This
location allows the thermostat to keep room
temperature at an ideal comfort level for most
replace applications. For positioning thermo­stat sensing bulb elsewhere, an adhesive-
backed mounting clip is available.
Tools needed: 1/4" hex driver or socket
1. Remove logs. Locate gas valve assem­bly and thermostat sensing bulb (see Figure 26).
2. With 1/4" hex driver or socket, loosen ther­mostat screw. Carefully slide thermostat
sensing bulb out of retaining clamp (see Figure 28).
Note: Do not remove the screw. Make
sure you tighten screw after removing thermostat sensing bulb.
IMPORTANT: Do not force or bend ther-
mostat sensing bulb or capillary.
3. Thermostat sensing bulb may be located
in lower right front side of replace. De­termine location of sensing bulb, but do
not mount sensing bulb until step 4. If you
have a masonry replace, see Figure 29
for location. If you have a factory-built
metal replace, see Figure 30 for location. If your replace has glass doors, position
sensing bulb directly behind door gap on right bottom side (see Figure 31).
Figure 27 - Adhesive-backed Mounting Clip
Thermostat
Screw
Capillary
Figure 28 - Removing Thermostat
Sensing Bulb
Thermostat Sensing Bulb
Adhesive-backed Mounting Clip
Figure 29 - Locating Thermostat Sensing
Bulb on Masonry Fireplace
Thermostat Sensing Bulb
Thermostat Sensing Bulb
Retaining Clamp
Gas Valve Assembly
Thermostat Sensing Bulb
Figure 26 - Location of Gas Valve
Assembly and Thermostat Sensing Bulb
www.desatech.com
Adhesive-backed Mounting Clip
Figure 30 - Locating Thermostat Sensing
Bulb on Factory-built Metal Fireplace
120890-01D24
OPTIONAL POSITIONING OF THERMOSTAT
SENSING BULB
Continued
4. Mounting clip must be a minimum of 3" from bottom of replace to prevent crimp-
ing of capillary. Once you have decided
on a location, clean area thoroughly.
Remove paper backing from adhesive on
back of mounting clip. Press clip into new location so thermostat sensing bulb will be positioned vertically with capillary at
bottom (see Figure 32). Slide thermostat sensing bulb into clip.
IMPORTANT: Do not crimp capillary.
Thermostat Sensing Bulb
Adhesive­backed Mounting Clip
Glass Doors
Figure 31 - Installing Thermostat Sensing
Bulb behind Glass Doors
Thermostat Sensing Bulb
Capillary
Figure 32 - Positioning Thermostat
Sensing Bulb in Vertical Position with
Capillary at Bottom
Adhesive­backed Mounting Clip
Do Not Crimp Capillary

SPECIFICATIONS

Model CLD3924PTC
• Rating (Variable): 20,000/39,000 Btu/Hr
• Type Gas: Propane/LP
• Ignition: Piezo
• Pressure Manifold: 8.0" W.C.
• Inlet Gas Pressure (in. of water):
Maximum 14" W.C., Minimum* 11" W.C.
• Shipping Weight: 27 lbs.
* For input adjustment
120890-01D 25
www.desatech.com
Model CLD3924NTC
• Rating (Variable): 20,000/39,000 Btu/Hr
• Type Gas : Natural Gas
• Ignition: Piezo
• Pressure Manifold: 3.5" W.C.
• Inlet Gas Pressure (in. of water): Maximum 10.5" W.C., Minimum* 5" W.C.
• Shipping Weight: 29 lbs.
* For input adjustment

TECHNICAL SERVICE

You may have further questions about instal­lation, operation or troubleshooting. If so, con­tact DESA Heating, LLC at 1-866-672-6040.
When calling please have your model and serial numbers of your heater ready.
You can also visit DESA Heating, LLC’s web
site at www.desatech.com.

REPLACEMENT PARTS

Note: Use only original replacement parts. This will protect your warranty coverage for parts replaced under warranty.
pARTS UNDER WARRANTY
Contact authorized dealers of this product. If they can’t supply original replacement part(s), call DESA Heating, LLC at 1-866-672-6040.
When calling DESA Heating, LLC, have
ready
• your name
• your address
• model and serial numbers of your heater
• how heater was malfunctioning
• type of gas used (propane/LP or natural
gas)
• purchase date

SERVICE HINTS

When Gas pressure Is Too Low
• pilot will not stay lit
• burners will have delayed ignition
• heater will not produce specied heat
• propane/LP gas supply may be low You may feel your gas pressure is too low. If
so, contact your local natural or propane/LP
gas supplier.
Usually, we will ask you to return the part to
the factory.
pARTS NOT UNDER WARRANTY
Contact authorized dealers of this product. If they can’t supply original replacement part(s), call DESA Heating, LLC at 1-866-672-6040 for
referral information.
When calling DESA Heating, LLC, have
ready
• model number of your heater
• the replacement part number
www.desatech.com
120890-01D26

ACCESSORIES

Purc ha se these accessories from you r local dealer. If they can not supply these
accessories, either contact your nearest Parts Central or call DESA Heating, LLC at 1-866-672-6040 for information. You can also write to the address listed on the back page
of this manual.
DAMPER CLAMP - GA6080
For variably-controlled models. Perma-
nently opens chimney ue damper for vented
operation.
FIREpLACE HOOD
Black - GA6050 Brass - GA6052 Antique Brass - GA6053
For all models. Helps deect heat away from
mantel or wall above replace.
LAVA ROCK - GA6060
For all models. Order when additional rock
is desired.

PARTS CENTRAL

These Parts Centrals are privately owned businesses. They have agreed to support our
customer’s needs by providing original replacement parts and accessories.
Those Heater Guys
255 E. Stowell Street Upland, CA 91786
909-928-3011
Tool & Equipment, Co.
5 Manila Ave
Hamden, CT 06514
1-800-397-7553 203-248-7553
Portable Heater Parts
342 N. County Rd. 400 East
Valparaiso, IN 46383
All States 219-462-7441 1-888-619-7060 sales@portableheaterparts.com techservice@portableheaterparts.com
FBD
1349 Adams Street
Bowling Green, KY 42103
270-846-1199 1-800-654-8534 Fax: 1-800-846-0090 franktalk@aol.com
Master Parts Dist.
1251 Mound Ave. NW
Grand Rapids, MI 49504
616-791-0505 1-800-446-1446 Fax: 616-791-8270
www.nbmc.com
Washer Equipment Co.
1715 Main Street
Kansas City, MO 64108 KS, MO, AR
816-842-3911
www.washerparts.com
East Coast Energy Products
10 East Route 36
W. Long Branch, NJ 07764
732-870-8809 1-800-755-8809
www.njplaza.com/ecep
21st Century
2950 Fretz Valley Road Perkasie, PA 18944
215-795-0400 800-325-4828
Laporte’s Parts & Service
2444 N. 5th Street
Hartsville, SC 29550
843-332-0191 Parts Department
Cans Unlimited, Inc.
P.O. Box 645
Taylor, SC 29687-0013
All States 803-879-3009 1-800-845-5301 cuisales@aol.com
120890-01D 27
www.desatech.com

PARTS

19
18
16
8
10
23
25
24
17
13
14
15
1
4
5
6
9
10
21
20
26
22
10
12
10
2
3
7
17
THERMOSTATICALLY-CONTROLLED ROYAL ENGLISH OAK MODELS
CLD3924NTC, CLD3924PTC
www.desatech.com
120890-01D28
PARTS
THERMOSTATICALLY-CONTROLLED ROYAL ENGLISH OAK MODELS
This list contains replaceable parts used in your heater. When ordering parts, follow the
instructions listed under Replacement Parts on page 26 of this manual.
KEY NO. PART NO. DESCRIpTION QTY.
1 ** Log Base • • 1 2 120785-01 Valve Bracket • • 1 3 098522-12 Gas Valve Assembly NG 1
098522-10 Gas Valve Assembly LP 1
4 098867-19 Gas Regulator, NG 1
098867-10 Gas Regulator, LP 1 5 097159-04 Piezo Ignitor • • 1 6 120783-01 Cast Iron Grate • • 1 7 120795-01 Inlet Tube • • 1 8 120786-01 Burner NG 1
120786-02 Burner LP 1 9 121544-01 Outlet Tube • • 1 10 M11084-26 HWH AB 10-16 x 0.38" Screw • • 7 11 099211-01 HWH AB 10-16 x 2.50" Screw • • 2 12 M11084-38 HWH AB 8-18 x 0.38" Screw • • 2 13 120630-01 ODS Pilot, NG 1
120630-02 ODS Pilot, LP 1 14 098249-01 ODS Nut • • 2 15 098271-10 Ignitor Cable • • 1 16 099056-16 Injector, 0.1200 1
099056-17 Injector, 0.0740 1 17 099387-09 Pilot Tube • • 1 18 108134-02 NG Plate 1 19 108188-02 Type U Drive 2 x 0.25" Screw 1 20 098544-01 Thermobulb/Clip • • 1 21 099064-02 Nylon Spacer • • 1 22 M11084-31 HWH AB 10-16 x 1.0 • • 1 23 121606-01 Main Log • • 1 24 121606-02 Front Log • • 1 25 121606-03 Crossover Log • • 1 26 099230-02 Shoulder Screw 10 x 0.63" • • 2
pARTS AVAILABLE — NOT SHOWN
100563-01 Warning Plate • • 1
101054-01 Lighting Instructions Plate • • 1
100639-12 Caution Decal • • 1
101137-01 Hardware Kit • • 1
GA6060 Lava Rock • • 1
** Not a eld replaceable part.
CLD3924NTC
CLD3924PTC
120890-01D 29
www.desatech.com
NOTES
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_____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________
www.desatech.com
120890-01D30
NOTES
_____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________
_____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________
_____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________
120890-01D 31
www.desatech.com
120890 01

WARRANTY

KEEP THIS WARRANTY
Model (
located on product or identication tag
Serial No. (
located on product or identication tag
Date Purchased __________________________
Keep receipt for warranty verication.
DESA HEATING, LLC LIMITED WARRANTIES
Standard Warranty: DESA Heating, LLC warrants this new product and any parts thereof to be free from defects in material and workmanship for a period of one (1) year from the date of rst purchase from an authorized dealer provided the product has been installed, maintained and operated in accordance with DESA Heating, LLC’s warnings and instructions.
For products purchased for commercial, industrial or rental usage, this warranty is limited to 90 days from the date of rst purchase.
Factory Reconditioned products
Limited Warranty: DESA Heating, LLC warrants factory reconditioned products and any parts thereof
to be free from defects in material and workmanship for 30 days from the date of rst purchase from an authorized dealer provided the product has been installed, maintained and operated in accordance with DESA Heating, LLC’s warnings and instructions.
Terms Common to All Warranties
The following terms apply to all of the above warranties:
Always specify model number and serial number when contacting the manufacturer. To make a claim under this warranty the bill of sale or other proof of purchase must be presented.
This warranty is extended only to the original retail purchaser when purchased from an authorized dealer, and only when installed by a qualied installer in accordance with all local codes and instructions furnished with this product.
This warranty covers the cost of part(s) required to restore this product to proper operating condition and an allowance for labor when provided by a DESA Heating, LLC Authorized Service Center or a provider approved by DESA Heating, LLC. Warranty parts must be obtained through authorized dealers of this prod­uct and/or DESA Heating, LLC who will provide original factory replacement parts. Failure to use original factory replacement parts voids this warranty.
Travel, handling, transportation, diagnostic, material, labor and incidental costs associated with warranty repairs, unless expressly covered by this warranty, are not reimbursable under this warranty and are the responsibility of the owner.
Excluded from this warranty are products or parts that fail or become damaged due to misuse, accidents, improper installation, lack of proper maintenance, tampering, or alteration(s).
This is DESA Heating, LLC’s exclusive warranty, and to the full extent allowed by law; this express warranty excludes any and all other warranties, express or implied, written or verbal and limits the duration of any and all implied warranties, including warranties of merchantability and tness for a particular purpose to one (1) year on new products and 30 days on factory reconditioned products from the date of rst purchase. DESA Heating, LLC makes no other warranties regarding this product.
DESA Heating, LLC’s liability is limited to the purchase price of the product, and DESA Heating, LLC shall not be liable for any other damages whatsoever under any circumstances including indirect, incidental, or
consequential damages.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specic legal rights, and you may also have other rights which vary from state to state.
For information about this warranty contact:
New products
) _____________________________
) __________________________
NOT A UPC
DESA Heating, LLC
2701 Industrial Drive
Bowling Green, KY 42101 www.desatech.com
1-866-672-6040
120890-01 Rev. D 09/08
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