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UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
24" THERMOSTAT MODELS CDR3924NT AND CDR3924PT
WARNING: If the information in this manual is not fol-
lowed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical sw
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WARNING: Improper installation, adjustment, altera- tion, service, or maintenance can cause injury or prop- erty damage. Refer to this manual for correct installation and operational procedures. For assistance or addi- tional information consult a qualified installer, service agency, or the gas supplier. WARNING: This appliance is for installation only in a solid-fuel burning masonry or UL127 factory-built fire- place, or in an listed ventless firebox enclosure. It is de- sign-certified for these
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SAFETY INFORMATION WARNING: This appliance is for installation only in a WARNING: This product solid-fuel burning fireplace or contains and/or generates chemicals known to the State approved ventless firebox en- of California to cause cancer or closure. birth defects, or other reproduc- tive harm. WARNING: Do not allow fans to blow directly into the fireplace. IMPORTANT: Read this owner’s Avoid any drafts that alter burner manual carefully and completely flame patterns. Ceiling fans can
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10. This heater needs fresh, outside air ventilation to SAFETY INFORMATION run properly. This heater has an Oxygen Deple- Continued tion Sensing (ODS) safety shutoff system. The 1. This appliance is only for use with the type ODS shuts down the heater if enough fresh air of gas indicated on the rating plate. This ap- is not available. See Air for Combustion and pliance is not convertible for use with other Ventilation, page 5. If heater keeps shutting off, gases. see Troubleshooting, pag
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SAFETY DEVICE PRODUCT This heater has a pilot with an Oxygen Deple- IDENTIFICATION tion Sensing (ODS) safety shutoff system. The Log Set 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 IGNITION SYSTEM This heater has an electronic ignitor to light heater fuel supply. AIR FOR COMBUSTION AND VENTILATION Ignitor WARNING: This heater shall Burner not be installed in a confined Control Knob space or unusually
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DETERMINING FRESH-AIR FLOW AIR FOR COMBUSTION FOR HEATER LOCATION AND VENTILATION Continued Determining if You Have a Confined or Unconfined Space Unusually Tight Construction Use this work sheet to determine if you have a The air that leaks around doors and windows confined or unconfined space. may provide enough fresh air for combustion and Space: Includes the room in which you will install ventilation. However, in buildings of unusually heater plus any adjoining rooms with doorless pas- t
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AIR FOR COMBUSTION 12" AND VENTILATION Continued Ventilation Ventilation Grills Grills A. Rework worksheet, adding the space of an adjoin- Into Adjoining Room, Into Adjoining Or Option 2 Room, ing room. If the extra space provides an unconfined Remove Option 1 Door into space, remove door to adjoining room or add Adjoining ventilation grills between rooms. See Ventilation Room, Option Air From Inside Building. 3 B. Vent room directly to the outdoors. See Ventila- tion Air From Outdoors, pa
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INSTALLATION WARNING: Seal any fresh NOTICE: This heater is intended air vents or ash clean-out doors for use as supplemental heat. located on floor or wall of fire- Use this heater along with your place. If not, drafting may cause primary heating system. Do not pilot outage or sooting. Use a install this heater as your pri- heat-resistant sealant. Do not mary heat source. If you have a seal chimney flue damper. central heating system, you may run system’s circulating blower WARNING:
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Minimum Noncombustible Material INSTALLATION Clearances Continued If Not Using Mantel INSTALLATION AND CLEARANCES Note: If using a mantel proceed to If Using Mantel. FOR VENT-FREE OPERATION If not using a mantel, follow the information on this page. WARNING: Maintain the You must have noncombustible material(s) above the fireplace opening. Noncombustible materials minimum clearances. If pos- (such as slate, marble, tile, etc.) must be at least sible, provide greater clearances 1/2 inch
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Mantel Shelf INSTALLATION 10" Underside of 8" Mantel Shelf Continued 6" 1 2 /2" MANTEL CLEARANCES In addition to meeting noncombustible material All minimum distances are clearances, you must also meet required clearances in inches between fireplace opening and mantel shelf. If Minimum Non- (A) Combustible you do not meet the clearances listed below, you Log Set Material 12" 18" 20" 22" 24" All Models will need a hood. Determining Minimum Mantel Clearance Top of Fireplace If you meet minim
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2. Locate two masonry screws in hardware INSTALLATION package. Continued 3. Place heater base in fireplace. INSTALLING HEATER BASE 4. Place logs in their proper position on heater ASSEMBLY base (see Installing Logs, page 14). 5. Center heater base and logs front-to-back and WARNING: You must secure side-to-side in fireplace. this heater to fireplace floor. If 6. Carefully remove logs without moving heater not, heater will move when you base. adjust controls. Moving heater 7. Mark screw lo
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INSTALLATION WARNING: For natural Continued gas, never connect heater to CONNECTING TO GAS SUPPLY private (non-utility) gas wells. This gas is commonly known WARNING: This appliance as wellhead gas. requires a 1/2" NPT (National Pipe Thread) inlet connection to the pressure regulator. CAUTION: Use only new, black iron or steel pipe. Inter- nally-tinned copper tubing may WARNING: A qualified ser- be used in certain areas. Check vice person must connect heater your local codes. Use pi
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CHECKING GAS CONNECTIONS INSTALLATION Continued WARNING: Test all gas pip- We recommend that you install a sediment trap in ing and connections, internal supply line as shown in Figure 13. Locate sediment and external to unit, for leaks trap where it is within reach for cleaning. Install after installing or servicing. Cor- in piping system between fuel supply and heater. Locate sediment trap where trapped matter is not rect all leaks at once. likely to freeze. A sediment trap traps moistu
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6. L gh hea e see Opera ng Hea er, page 16 . i t t r ( ti t ) INSTALLATION Check all other internal joints for leaks. Continued 7. Turn off heater (see To Turn Off Gas to Appli- Test Pressures Equal To or Less Than ance, page 17). 1/2 PSIG (3.5 kPa) 1. Close equipment shutoff valve (see Figure 14). Thermostat Gas Valve or Control Valve Location Equipment 2. Pressurize supply piping system by either Shutoff Valve opening propane/LP supply tank valve for propane/LP gas or opening main gas va
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INSTALLATION Crossover Continued Log #6 1. Place middle log (#1) onto log alignment Rear screw located near the center of base, and in Log #5 place over log support bracket as shown in Figures 17 and 18. 2. Place front log (#2) onto base. Position log onto two alignment screws to the front of base (see Figure 18). 3. Place left side log (#3) onto two log alignment screws on left side of base (see Figure 18). 4. Place right side log (#4) onto two log alignment screws on right side of bas
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LIGHTING OPERATING HEATER INSTRUCTIONS FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: • If fireplace has glass doors, WARNING: If you do not fol- never operate this heater with low these instructions exactly, glass doors closed. If you oper- a fire or explosion may result ate heater with doors closed, causing property damage, per- heat buildup inside fireplace sonal injury or loss of life. will cause glass to burst. Also A. This appliance has a pilot which must be if fireplace opening has
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Ignitor OPERATING HEATER Thermocouple Electrode Continued Pilot Burner Pilot Burner 5. Turn control knob counterclockwise to the PILOT position. Press in control knob for five (5) seconds (see Figure 21). Note: You may be running this heater for the first time after hooking up to gas sup- Thermocouple ply. If so, the control knob may need to be Figure 22 - Pilot Figure 23 - Pilot pressed in for 30 seconds or more. This will (Propane/LP) (Natural) allow air to bleed from the gas system. 6
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INSPECTING BURNERS WARNING: If yellow tipping Check pilot flame pattern and burner flame pat- terns often. occurs, your heater could pro- duce increased levels of carbon PILOT FLAME PATTERN monoxide. If burner flame pat- Figure 24 shows a correct pilot flame pattern. terns show yellow tipping, follow Figure 25 shows an incorrect pilot flame pattern. instructions below. Yellow flame The incorrect pilot flame is not touching the thermocouple. This will cause the thermocouple on rear burner is n
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dirt, particles of dust, lint, or pet hair with a CLEANING AND soft cloth or vacuum cleaner nozzle. MAINTENANCE 5. Blow air into the primary air holes on the injector holders. WARNING: Turn off heater 6. In case any large clumps of dust have now been and let cool before cleaning. pushed into the burner repeat steps 3 and 4. Clean the pilot assembly also. A yellow tip on the pilot flame indicates dust and dirt in the pilot assembly. CAUTION: You must keep con- There is a small pilot air
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TROUBLESHOOTING WARNING: Turn off heater and let cool before servicing. Only a qualified 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 POSSIBLE CAUSE REMEDY When ignitor button is pressed, 1. Ignitor electrode not con- 1. Reconnect ignitor cable there is no spark at ODS/pilot nected to ignitor cable 2.
