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DESA INTERNATIONAL

UNVENTED (VENT-FREE)

NATURAL GAS LOG HEATER

Manually Control Models Also Designed Certified as Vented Decorative Appliance)

This appliance may be installed in an aftermarket* manufactured (mobile) home,

where not prohibited by state or local codes.

* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

OWNER’S OPERATION AND INSTALLATION MANUAL

Save this manual for future reference.

®

18", 24", and 30" Log Sets

Thermostat and Manually-Controlled Models

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 build-
ing.

• Immediately call your gas supplier

from a neighbor’s phone. Follow the
gas supplier’s instructions.

• If you cannot reach your gas sup-

plier, call the fire department.

— Installation and service must be per-

formed by a qualified installer, service
agency, or the gas supplier.

WARNING: Improper installation, adjust-
ment, alteration, service, or maintenance
can cause injury or property damage.
Refer to this manual for correct installa-
tion and operational procedures. For
assistance or additional information con-
sult a qualified installer, service agency,
or the gas supplier.

WARNING: This gas log set is for instal-
lation in a masonry solid fuel burning
fireplace, a U.L. listed manufactured
solid fuel burning fireplace or an AGA
design certified vent-free firebox listed
for use with these gas log models.

WARNING: This is an unvented gas-
fired heater. It uses air (oxygen) from
the room in which it is installed. Provi-
sions for adequate combustion and ven-
tilation air must be provided. Refer to
“Air for Combustion and Ventilation”
section in this manual.

Summary of Contents for CF18N

Page 1: ...t use any phone in your build ing Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas sup plier call the fire department Inst...

Page 2: ...g agent is added to the gas The odor helpsyoudetectagasleak However theodoraddedtothegascanfade Gasmaybepresent even though no odor exists Make certain you read and understand all Warnings Keep this m...

Page 3: ...heater and call a qualified service person Note During initial operation slight smoking may occur due to log curing and heater burning manufacturing residues 9 Do not allow fans to blow directly into...

Page 4: ...isticflamesandglowingcoals This heater is designed for vent free operation with flue damper closed State and local codes in some areas prohibit the use of vent free heaters You can operate heater as a...

Page 5: ...1992 Section 5 3 defines confined space as having an air volume of less than 50 cubic feet 127 cubic cm for each 1000 Btu Hr input rating of all appliances in the space cubic feet equals length x wid...

Page 6: ...heater ___________________ BTU Hr Gas fireplace logs ___________________ BTU Hr Other gas appliances ___________________ BTU Hr Total ___________________ BTU Hr Example Gas water heater 40 000 BTU Hr...

Page 7: ...f ventilation grills or ducts WARNING ICON G 001 WARNING Rework worksheet adding the space of the adjoining unconfined space The combined spaces must have enough fresh air to supply all appliances in...

Page 8: ...clothing or other flammable objects are less than 36 inches from the front top or sides of the heater in high traffic areas in windy or drafty areas WARNING ICON G 001 CAUTION This heater creates war...

Page 9: ...e instructions below This will ensure safe installation into a masonry or U L listed manufactured fireplace Minimum Wall and Ceiling Clearances see Figure 4 A Clearances from the side of the fireplace...

Page 10: ...ible material must extend at least 8 up for all models If non combustible material is less than 12 you must install the fireplace hood accessory 24 and 30 models only See chart below and Figure 5 for...

Page 11: ...tion page 13 Figure 6 Minimum Mantel Clearances Without Using Hood Minimum Non Combustible Material Minimum Non Combustible Material Height Distances to Underside of Mantel Top of Fireplace Opening Un...

Page 12: ...le flooring see Figure 9 Hearth 5 Min Combustible Material Figure 9 Minimum Fireplace Clearances Above Combustible Flooring If your installation does not meet the above minimum clearances you must ope...

Page 13: ...number 1 or 2 above apply to you you must permanently open chimney flue damper You must install the damper clamp accessory to order see Accessories page 33 This will insure vented operation see Figur...

Page 14: ...racket Installation Items Needed hardware package provided with heater approved flexible gas hose not provided if allowed by local codes sealant resistant to LP gas not provided electric drill with 3...

Page 15: ...NG Continued Heater Gas Regulator Flexible Gas Hose if allowed by local codes Figure 11 Attaching Flexible Gas Hose to Heater Gas Regulator Mounting Bracket Masonry Screw Figure 12 Attaching Mounting...

Page 16: ...o heater If pipe is too small undue loss of pressure will occur Installation must include a manual shutoff valve union and plugged 1 8 NPT tap Locate NPT tap within reach for test gauge hook up NPT ta...

Page 17: ...sure for purpose of input adjustment INSTALLING Continued WARNING ICON G 001 WARNING Never use an open flame to check for a leak Apply a mixture of liquid soap and water to all joints Bubbles forming...

Page 18: ...w a leak 4 Correct all leaks at once Pressure Testing Heater Gas Connections 1 Open manual shutoff valve see Figure 14 2 Open main gas valve located on or near gas meter 3 Make sure control knob of he...

Page 19: ...ar burner see Figure 16 2 Slide front log 2 into place behind front burner Make sure tabs at bottom of log are behind front burner see Figure 17 3 Place crossover log 3 into place see Figure 18 Be sur...

Page 20: ...opushinorturnthegascontrolknob Neverusetools Iftheknob will not push in or turn by hand don t try to repair it call a qualified service technicianorgassupplier Forceorattemptedrepairmayresultinafireor...

Page 21: ...clockwise to the PILOT position Press in control knob for five 5 seconds see Page 20 Note You may be running this heater for the first time after hooking up to gas supply If so the control knob may ne...

Page 22: ...er Forceorattemptedrepairmayresultinafireorexplosion D Do not use this appliance if any part has been under water Immediately call a qualified service technician to inspect the appliance and to replac...

Page 23: ...ss in and turn control knob clockwise Clockwise to the PILOT position 2 Press in control knob and turn clockwise Clockwise to the OFF position Shutting Off Burners Only pilot stays lit 1 Press in and...

Page 24: ...rner flame pattern Figure 27 shows incorrect front burner flame pattern The incorrect burner flame pattern shows yellow tipping at top of blue flame If front burner flame pattern is incorrect as shown...

Page 25: ...milar object to clean ODS pilot This can damage ODS pilot unit POSSIBLE CAUSE 1 Ignitor electrode not con nected to ignitor cable 2 Ignitor cable pinched or wet 3 Piezo ignitor nut is loose 4 Broken i...

Page 26: ...turn more 7 Replace thermocouple 8 Replace control valve OBSERVED PROBLEM When ignitor button is pressed there is spark at ODS pilot but no ignition ODS pilot lights but flame goes out when control kn...

Page 27: ...Problem will stop after a few hours of operation 1 Turn control knob to LO position and let warm up for a minute 2 Operate burners until air is removed from line Have gas line checked by local natural...

Page 28: ...l valve defective 1 Foreign matter between control valve and burner 2 Gas leak See Warning statement at top of page 1 Thermostat sensing bulb needs to be repositioned OBSERVED PROBLEM Heater produces...

Page 29: ...mostat Sensing Bulb 1 Locate the gas valve assembly and thermostat sensing blub see Figure 28 2 The adhesive backed mounting clip see Figure 29 is attached to the thermostat sensing bulb Remove the ad...

Page 30: ...ve backed Mounting Clip Glass Doors Figure 33 Installing Thermostat Sensing Bulb behind Glass Doors Thermostat Sensing Bulb 5 The mounting clip must be a minimum of 3 from bottom of fireplace to preve...

Page 31: ...lbs SPECIFICATIONS 18 Manually 24 Manually 30 Manually Controlled Controlled Controlled Btu Variable 8 000 14 000 10 000 17 000 11 000 18 000 26 000 33 000 36 000 Type Gas Natural Gas Only Natural Ga...

Page 32: ...ional have ready your name your address model number of your heater how heater was malfunctioning type of gas used propane or natural gas purchase date Usually we will ask you to return the defective...

Page 33: ...FF VALVE GA5010 For all models Manual shutoff valve with 1 8 NPT tap Fits 1 2 NPT pipe BLACK FIREPLACE HOOD GA6050 For all models Helps deflect heat away from mantel or wall above fireplace BRASS FIRE...

Page 34: ...34 101308 ILLUSTRATED PARTS BREAK DOWN Manually Controlled Models 6 7 8 9 10 11 8 8 27 13 12 13 14 15 16 18 17 19 20 21 22 23 24 25 26 27 6 28 29 30 7 1 7 2 10 1 10 2 1 2 3 4 5...

Page 35: ...ase Assembly with decals 1 13 098271 06 098271 06 098271 06 Ignitor Cable 1 14 097159 02 097159 02 097159 02 Piezo Ignitor 1 15 098867 09 098867 09 098867 09 Gas Regulator 1 16 M11084 38 M11084 38 M11...

Page 36: ...36 101308 ILLUSTRATED PARTS BREAK DOWN Thermostat Controlled Models 31 6 25 6 7 8 9 10 11 8 8 29 13 12 13 14 15 16 18 17 19 24 26 27 7 1 7 2 29 22 23 21 28 20 30 3 1 2 4 5 10 1 10 2...

Page 37: ...ith decals 1 13 098271 06 098271 06 098271 06 Ignitor Cable 1 14 097159 02 097159 02 097159 02 Piezo Ignitor 1 15 098867 07 098867 07 098867 07 Gas Regulator 1 16 M11084 38 M11084 38 M11084 38 Screw 2...

Page 38: ...38 101308 NOTES...

Page 39: ...39 101308 NOTES...

Page 40: ...such other costs related to repairing a defective heater will be the responsibility of the owner TOTHEFULLEXTENTALLOWEDBYTHELAWOFTHEJURISDICTIONTHATGOVERNSTHESALEOFTHE PRODUCT THIS EXPRESS WARRANTY EX...

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