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105566

OWNER’S MANUAL

FA-3B

FAS-3C

FA-5B

FAS-5C

Save this manual for future reference.

INFRARED VENT-FREE NATURAL GAS HEATER

OWNER’S OPERATION AND INSTALLATION MANUAL

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 qualified installer, service agency, or the
gas supplier.

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

WARNING: This is an
unvented gas-fired 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
4 of this manual.

WARNING: Improper instal-
lation, adjustment, alteration,
service, or maintenance can
cause injury or property dam-
age. Refer to this manual for
correct installation and op-
erational procedures. For as-
sistance or additional infor-
mation consult a qualified in-
staller, service agency, or the
gas supplier.

This appliance may be installed in an aftermarket*, permanently located, manufac-
tured (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.

Summary of Contents for Glo-Warm FA-3B

Page 1: ...be performed by a qualified installer service agency or the gas supplier Aftermarket Completion of sale not for purpose of resale from the manufacturer WARNING This is an unvented gas fired heater It...

Page 2: ...Oxygen Depletion Sensor ODS safety shutoff system The ODS shuts down the heater if not enough fresh air is available See Fresh Air for Combus tion and Ventilation pages 4 through 6 6 Keep all air open...

Page 3: ...afety 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 ig...

Page 4: ...rating of one perm 6 x 10 11 kg per pa sec m2 or less with open ings gasketed or sealed and b weather stripping has been added on openable windows and doors and c caulking or sealants are applied to a...

Page 5: ...Btu Hr Do not include direct vent gas appliances Direct vent draws combustion air from the outdoors and vents to the outdoors 4 Compare the maximum Btu Hr the space can support with the actual amount...

Page 6: ...e To Crawl Space To Attic FRESH AIR FOR COMBUSTION AND VENTILATION Continued Or Remove Door into Adjoining Room Option 3 Ventilation Grills Into Adjoining Room Option 2 12 12 Ventilation Grills into A...

Page 7: ...s without enough ventilationairmaycausemildewtoformfrom too much moisture See Fresh Air for Com bustion and Ventilation pages 4 through 6 Continued CAUTION If you install the heater in a home garage h...

Page 8: ...RNING Maintainminimum clearances shown in Figure 8 If you can provide greater clear ancesfromfloorandjoiningwall INSTALLING HEATER TO WALL Mounting Bracket The mounting bracket is located on back pane...

Page 9: ...rked locations using 9 64 drill bit 2 Place mounting bracket onto wall Line up last hole on each end of bracket with holes drilled in wall 3 Insert mounting screws through bracket and into wall studs...

Page 10: ...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 IMPORTANT Hold pressure regulat...

Page 11: ...oap and wa ter to gas joints Bubbles forming show a leak 5 Correct all leaks at once 6 Light heater see Operating Heater pages 11 and 12 for non thermostat models or pages 13 and 14 for thermo stat mo...

Page 12: ...alified service person or supplier for repairs 6 Release downward pressure on con trol knob and turn clockwise to OFF position 7 Press in control knob and turn back to PILOT IGN This will cause the pi...

Page 13: ...he piezo ignitor to spark and light the pilot gas Keep control knob de pressed for 10 seconds before releas ing If needed repeat steps 5 through 7 until pilot lights Note If pilot does not stay lit re...

Page 14: ...c WARNING Turn off heater and let cool before servicing OPERATING HEATER Continued MANUAL LIGHTING PROCEDURE 1 Follow steps 1 through 5 under Light ing Instructions page 13 2 With control knob pressed...

Page 15: ...or partially clogged ODS pilot 6 Thermocouple damaged 7 Control valve damaged REMEDY 1 Replace ignitor 2 Replace ignitor 3 Reconnect ignitor cable 4 Free ignitor cable if pinched by any metal or tubin...

Page 16: ...eplace burner orifice s 2 Replace burner 3 Replace gas regulator 1 Replace burner 2 Contact local natural gas company 3 Turn control knob until it locks at de sired setting 1 Problem will stop after a...

Page 17: ...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 Moisture condensationnoticedonwindows REMEDY 1...

Page 18: ...03 3414 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 2672 616 791 0505 1 800 446 1446 Fax 616 791 8270 www nbmc com Washer...

Page 19: ...aservicemanualfromthe address listed on the back page of this manual Send a check for 5 00 payable to DESA International SERVICE HINTS When Gas Pressure Is Too Low pilot will not stay lit burner s wil...

Page 20: ...INFRARED NATURAL GAS HEATER 28 21 27 27 26 7 2 7 1 22 23 24 25 3 4 See Detail ILLUSTRATED PARTS BREAKDOWN FA 3B Burner Assembly 11 10 6 18 16 15 14 7 9 7 13 12 8 19 17 5 4 20 20 20 5 1 5 2 ODS Pilot...

Page 21: ...ve Bracket 1 11 L98054 01 Control Valve Fixed Nut 1 12 L98059 01 Control Valve Main Inlet Nut 1 13 L98115 02 Main Inlet Tube Assembly 1 14 L98124 02 Valve to Regulator Line Assembly 1 15 L98914 01 Pil...

Page 22: ...ATER ILLUSTRATED PARTS BREAKDOWN FA 5B Burner Assembly 33 26 32 32 31 7 2 4 See Detail 7 1 27 28 29 30 3 11 10 4 6 7 5 9 7 23 21 25 24 24 24 24 24 22 20 13 12 8 14 18 25 17 19 15 16 TO B1 TO B2 TO C1...

Page 23: ...L98115 01 Main Inlet Tube Assembly 1 14 L98124 01 Valve to Regulator Line Assembly 1 15 L98914 01 Pilot Regulator Assembly 1 16 L98125 01 Regulator to ODS Line Assembly 1 17 L98116 01 Burner Gas Line...

Page 24: ...ATURAL GAS HEATER ILLUSTRATED PARTS BREAKDOWN FAS 3C Burner Assembly 15 16 13 19 23 22 11 9 12 21 16 14 10 4 23 20 17 18 16 16 29 2 29 28 24 25 1 26 27 16 8 16 13 7 9 17 24 4 See Detail 3 5 6 14 1 14...

Page 25: ...t 1 13 L98411 01 Ignitor Line 1 14 L98071 03 ODS Pilot 1 14 1 098514 01 Thermocouple 1 14 2 L98071 07 Ignitor Electrode 1 15 L98072 01 ODS Mounting Bracket 1 16 L98817 01 Self Tapping Screw 7 17 L9812...

Page 26: ...TED PARTS BREAKDOWN FAS 5C Burner Assembly 12 11 4 15 16 14 13 16 26 24 28 25 21 28 27 27 27 27 27 22 18 17 19 10 20 23 9 TO B1 TO B2 TO C1 TO C2 16 16 34 2 34 33 29 30 1 31 32 16 8 16 13 7 9 17 29 4...

Page 27: ...1 07 Ignitor Electrode 1 15 L98072 01 ODS Mounting Bracket 1 16 L98817 01 Self Tapping Screw 14 17 L98124 03 Valve to Regulator Gas Line Assembly 1 18 L98914 01 Pilot Regulator Assembly 1 19 L98125 03...

Page 28: ...e 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 main...

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