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For more information, visit www.desatech.com

 

WARNING: If the information in this manual is not 

followed 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 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 fire 

department.

—  Installation and service must be performed by a quali-

fied installer, service agency or the gas supplier.

INSTALLER:  Leave  this  manual  with  the  appliance. 
CONSUMER: Retain this manual for future reference.

UNVENTED (VENT-FREE) GAS LOG HEATER

OWNER’S OPERATION AND INSTALLATION MANUAL

Also Design-Certified As Vented Decorative Appliances When 

Not Used With Hand-Held Thermostat Remote

MODELS CGE3924NR  

AND CGE3924PR

Summary of Contents for CGE3924NR

Page 1: ...itch do not use any phone in your building Immediatelycallyourgassupplierfromaneighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and service must be performed by a quali fied installer service agency or the gas supplier INSTALLER Leave this manual with the appliance CONSUMER Retain this manual for future reference UNV...

Page 2: ...fuel burning masonry or UL127 fac tory built fireplace or in a listed ventless firebox en closure It is design certi fied for these installations in accordance with ANSI Z21 11 2 Exception Do not install this appliance in a factory built fireplace that includes instructions stating it has not been test ed or should not be used with unvented gas logs WARNING This is an unvented gas fired heat er It...

Page 3: ...gh 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 WARNING Any change to this heater or its controls can be dangerous SAFETY Continued WARNING Donotallowfans toblowdirectlyintothefireplace Avoidanydraftsthatalterburner flame patterns Ceiling fans can create drafts that alter burner flame pa...

Page 4: ... obstructions across openings of fireplace 9 This log heater is designed to be smoke less If logs ever appear to smoke turn off heater and call a qualified service person Note During initial operation slight smok ing may occur due to log curing and heater burning manufacturing residues 10 To prevent the creation of soot follow the instructions in Cleaning page 25 11 Before using furniture polish w...

Page 5: ...tch 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 fired 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 Unpacki...

Page 6: ...more energy efficient 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 efficient your home needs to breathe Fresh air mus...

Page 7: ...h air ventilation c caulking or sealants are applied to areas such as joints around window and door frames between sole plates and floors 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 ...

Page 8: ...nt WARNING If the area in which the heater may be oper ated is smaller than that defined as an unconfined space or if the building is of unusually tight construction provide adequate combustion and ventilation air byoneofthemethodsdescribed in the National Fuel Gas Code ANSI Z223 1 NFPA 54 or appli cable local codes VENTILATION AIR Ventilation Air From Inside Building This fresh air would come fro...

Page 9: ...tribute soot within the house Inspect chimney flue for damage If damaged repair flue before operating heater WARNING Seal any fresh air vents or ash clean out doors located on floor or wall of fire place If not drafting may cause pilot outage or sooting Use a heat resistant sealant Do not seal chimney flue damper WARNING Never install the heater in a bedroom or bathroom unless installed as a vente...

Page 10: ...opening see Figure 4 Note When installing your gas logs into a manufactured firebox follow firebox manufacturer s instructions for minimum clearances to combustible materials B Clearances from the top of the fireplace opening to the ceiling should not be less than 42 INSTALLation Continued NOTICE Manual control heaters may be used as a vented product If so you must always run heater with chimney f...

Page 11: ...tel shelf See Figure 5 and Figures 6 and 7 on page 12 for minimum clearances IMPORTANT If you cannot meet these mini mum clearances you must operate heater with chimney flue damper open Go to Install ing Damper Clamp Accessory for Vented Operation page 13 Mantel Clearances In addition to meeting noncombustible mate rial clearances you must also meet required clearances between fireplace opening an...

Page 12: ...imum 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 Log Set 24 Models 2 1 2 6 8 10 Minimum Noncombustible Material 8 Min 12 15 18 All minimum distances are in inches Log Set 24 Models 20 2 1 2...

Page 13: ...sition If you choose to use your heater as a manu ally controlled model no remote control installed you may use this heater as a vented product There are three reasons for operating your heater in the vented mode Chimney Height Minimum Permanent Flue Opening 6 to 15 39 sq inches 15 to 30 29 sq inches 1 The fireplace does not meet the clearance to combustibles requirements for vent free operation 2...

Page 14: ...ote Install remote receiver and hand held remote kit included with this log set see Ac cessories page 31 for On Off Remote option before installing gas log heater See installa tion instructions included with the kit Installation Continued 1 Apply pipe joint sealant lightly to male threads of the fitting to be threaded into gas regulator Connect approved flexible gas hose to gas regulator of heater...

Page 15: ...egulator will reduce incoming gas pressure You must reduce incoming gas pressure to between 11 and 14 of water If you do not re duce incoming gas pressure heater regulator damage could occur Install external regulator with the vent pointing down as shown in Figure 13 Pointing the vent down protects it from freezing rain or sleet CAUTION Use only new black iron or steel pipe Inter nally tinned copp...

Page 16: ... by local codes CHECKING GAS CONNECTIONS WARNING Testallgaspiping and connections internal and external to unit for leaks after installing or servicing Correct all leaks at once WARNING Never use an open flame to check for a leak Applyanoncorrosiveleakdetec tion fluid to all joints Bubbles forming show a leak Correct all leaks at once CAUTION Make sure exter nal regulator has been installed betwee...

Page 17: ...ear gas meter for natural gas 3 Make sure control knob of heater is in OFF position 4 Check all joints from propane LP sup ply tank to equipment shutoff valve for propane LP gas see Figure 16 or from gas meter to equipment shutoff valve for natural gas see Figure 17 Apply noncor rosive leak detection fluid to gas joints Bubbles forming show a leak 5 Correct all leaks at once 6 Light heater see Ope...

Page 18: ...terminal wires to the battery 5 Remove heater base from fireplace 6 Install receiver bracket to base with phil lips screws provided in hardware kit as shown in Figure 18 7 Disconnectjumperwirefromcontrolvalveat TPTH and TH locations see Figure 19 8 Install remote receiver into receiver bracket using pads and push button clips provided with receiver see Figure 20 9 Connect wires to control valve at...

Page 19: ...flamescontactanylog If so reposition logs according to the log installation instructions in this manual Flames contact ing logs will create soot 1 Align three pins on base with three holes in bottom of back log 1 Place log on pins see Figure 23 Log 1 will wrap around right end of rear burner 2 Place right front log 2 on base to right of ember bed burner as shown Figure 24 The front of log 2 sits b...

Page 20: ...ace of ember bed burner as shown in Figure 28 page 19 Do NOT overlap ember material Only edges will glow Do NOT place ember material in area of pilot or rear burner 7 Add lava rock around base to heater if desired Do not place lava rock on logs or burner Do NOT place lava rock on or around front burner Figure 27 Installing Log 5 Log 5 Pins Log 1 Log 2 WARNING Do not operate unit without ember mate...

Page 21: ...ediately call a qualified 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 fireplace has glass doors never operate this heater with glass doors closed If you op erateheaterwithdoorsclosed heat buildup inside fireplace willcauseglasstoburst Make suretherearenoobstructions across ...

Page 22: ...o the control knob may need to be pressed in for 30 seconds or more This will allow air to bleed from the gas system 6 With control knob pressed in press and release electronic ignitor button This will light pilot Hold in ignitor button until pilot lights See Figure 24 page 18 for pilot viewing hole location Note If pilot does not stay lit contact a qualified service person or gas supplier for rep...

Page 23: ...ou must light the pilot before using the hand held re mote control unit See Lighting Instructions on page 21 After lighting let pilot flame burn for about one minute Turn control knob to ON position Adjust flame adjustment knob anywhere between HI and LO Slide the selector switch to the REMOTE position see Figure 32 Note The burner may light if hand held re mote was on when selector switch was las...

Page 24: ...ocked by debris or rust with no flame present If so turn off heater and let cool Remove blockage blocked burner flame holes will create soot Inspecting Burners Key Pad Lock Feature This feature allows the user to lock unlock the keypad on the hand held remote in the MANU or AUTO mode to prevent inadvertent op eration i e children operating the hand held remote control etc The keypad is locked in e...

Page 25: ... Allow the unit to cool for at least thirty minutes 2 Inspect burner pilot and primary air inlet holes in rear burner for dust and dirt see Figure 36 3 Blow air through the holes in the burner 4 Remove any large particles of dust dirt lint or pet hair with a soft cloth or vacuum cleaner nozzle Burner Tube Injector Holder Primary Air Inlet Holes Ports Slots Propane LP Gas Pilot Assembly Pilot Air I...

Page 26: ...ILOT position 4 Air in gas lines when in stalled 5 Depleted gas supply pro pane LP only 6 ODS pilot is clogged 7 Gas regulator setting is not correct OBSERVED PROBLEM Whenignitorbuttonispressed there is no spark at ODS pi lot Whenignitorbuttonispressed there is spark at ODS pilot but no ignition REMEDY 1 Reconnect ignitor cable 2 Free ignitor cable if pinched by any metal or tubing Keep ignitor ca...

Page 27: ...elector in OFF position 5 Wire disconnected from gas control 1 Manifold pressure is too low 2 Burner orifice clogged 1 Burner orifice is clogged or damaged 2 Damaged burner 3 Gas regulator defective REMEDY 1 Press in control knob fully 2 After ODS pilot lights keep control knob pressed in 30 seconds 3 Fully open equipment shut off valve 4 A Contact local natural or propane LP gas company B Clean O...

Page 28: ...When heated vapors from furniture polish wax carpet cleaners etc may turn into white powder residue 1 Battery is not installed Battery power is low REMEDY 1 Check burner for dirt and debris If found clean burn er see Cleaning page 25 2 Replace gas control 3 Problem will stop after a few hours of operation 1 Refer to Air for Combustion and Ventilation require ments page 6 1 Turn control knob to LO ...

Page 29: ...vailable 2 Low line pressure 3 ODS pilot is partially clogged 1 Gas leak See Warning statement above 2 Control valve defective 1 Foreign matter between control valve and burner 2 Gas leak See Warning statement above OBSERVED PROBLEM Heater produces a clicking tick ing noise just after burner is lit or shut off Heater produces unwanted odors Heater shuts off in use ODS operates Gas odor even when c...

Page 30: ...oting If so contact DESA Heating Products Technical Service Department at 1 866 672 6040 When calling please have your model and serial numbers of your heater ready You can also visit DESAHeating Products tech nical service 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 W...

Page 31: ...eat away from mantel or wall above fireplace DAMPER CLAMP GA6080 For all models Permanently opens chimney flue damper for vented operation Can be used only with non thermostat accessories LAVA ROCK GA6060 For all models Order when additional rock is desired 1 8 lb bag cleaning kit Cck For all models Your vent free gas appliance requires regular cleaning and maintenance to prevent performance probl...

Page 32: ...www desatech com 119638 01C 32 Parts MODELS CGE3924NR and CGE3924PR 15 31 19 16 23 11 5 20 21 6 3 7 8 14 19 17 1 22 10 4 22 2 18 25 12 9 13 24 22 19 19 23 30 26 28 27 29 ...

Page 33: ...1004 12 Injector Front NG 1 101004 13 Injector Front Propane LP 1 15 112881 02 Pilot Bracket NG 1 112881 01 Pilot Bracket Propane LP 1 16 111727 01 Remote Valve Bracket 1 17 111435 01 Electronic Ignitor 1 18 098271 12 Ignitor Cable 1 19 108631 01 Screw PPH B 10 16 x 1 0 4 20 103784 01 Extension Knob Pilot 1 21 103784 02 Extension Knob Hi Lo 1 22 M11084 26 Screw HWH AB 10 16 x 0 38 7 23 M12461 26 S...

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Page 36: ...anty The heater MUST be installed by a qualified installer in accordance with all local codes and instructions furnished with the unit This warranty does not apply to parts that are not in original condition because of normal wear and tear or parts that fail or become damaged as a result of misuse accidents lack of proper maintenance or defects caused by improper installation Travel diagnostic cos...

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