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15

105568

OWNER’S MANUAL

TROUBLESHOOTING

Note:

 All troubleshooting items are listed in

order of operation.

 WARNING: Turn off and un-

plug heater and let cool before
servicing. Only a qualified ser-
vice 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.

POSSIBLE CAUSE

1. Ignitor electrode positioned wrong
2. Ignitor electrode broken
3. Ignitor electrode not connected to igni-

tor cable

4. Ignitor cable pinched or wet

5. Broken ignitor cable
6. Bad piezo ignitor

1. Gas supply turned off or manual 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 installed

5. ODS/pilot is clogged

6. Gas regulator setting is not correct

1. Control knob not fully pressed in
2. Control knob not pressed in long enough

3. Manual shutoff valve not fully open
4. Thermocouple connection loose at con-

trol valve

5. Pilot flame not touching thermocouple,

which allows thermocouple to cool,
causing pilot flame to go out. This prob-
lem could be caused by one or both of
the following:
A) Low gas pressure
B) Dirty 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 tubing. Keep ignitor cable dry

5. Replace ignitor cable
6. Replace piezo ignitor

1. Turn on gas supply or open manual

shutoff valve

2. Turn control knob to PILOT position
3. Press in control knob while in PILOT

position

4. Continue holding down control knob. Re-

peat igniting operation until air is removed

5. Clean ODS/pilot (see Cleaning and

Maintenance, page 14) or replace ODS/
pilot assembly

6. Replace gas regulator

1. Press in control knob fully
2. After ODS/pilot lights, keep control

knob pressed in 30 seconds

3. Fully open manual shut-off valve
4. Hand tighten until snug, then tighten 1/4

turn more

5. A) Contact local natural gas company

B) Clean ODS/pilot (see Cleaning and
Maintenance
, page 14) or replace ODS/
pilot assembly

6. Replace thermocouple
7. Replace control valve

OBSERVED PROBLEM

When ignitor button is pressed, there is no
spark at ODS/pilot

When ignitor button is pressed, there is
spark at ODS/pilot but no ignition

ODS/pilot lights but flame goes out when
control knob is released

Note:

 For additional help, visit DESA

International’s Technical Service web
site at 

www.desatech.com

.

www.desatech.com

Continued

Summary of Contents for Glo-Warm FA-20BB

Page 1: ...s 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 This appliance may be installed...

Page 2: ...y system The ODS shuts down the heater if not enough fresh air is available See Air for Combustion and Ventilation pages 4 through 6 6 Keep all air openings in front and bot tom of heater clear and fr...

Page 3: ...ptly inform dealer where you bought heater Figure 1 Vent Free Natural Gas Heater Models FAS 20BB Shown Ignitor Button Control Knob Heater Cabinet Front Panel PRODUCT FEATURES SAFETY DEVICE This heater...

Page 4: ...ventilation However in buildings of unusually tight construction you must provide additional fresh air Unusually tight construction is de fined as construction where a walls and ceilings exposed to t...

Page 5: ...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 of Btu Hr use...

Page 6: ...attic will activate the power vent 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 int...

Page 7: ...l sur faces next to heater Installing heater next to vinyl or cloth wall coverings or operating heater where impurities such as to bacco smoke aromatic candles cleaning fluids oil or kerosene lamps et...

Page 8: ...where heater will be located Make sure mounting bracket is level 2 Mark screw locations on wall see Fig ure 7 Note Only mark last hole on each end of mounting bracket Insert mounting screws through th...

Page 9: ...clogged heater valves Installsedimenttrapinsupplylineasshown in Figure 12 Locate sediment trap where it is within reach for cleaning Locate sedi ment trap where trapped matter is not likely to freeze...

Page 10: ...aks at once CHECKING GAS CONNECTIONS INSTALLATION Continued TestPressuresEqualToorLessThan 1 2 PSIG 3 5 K Pa 1 Close manual shutoff valve see Fig ure 13 2 Pressurize supply piping system by ei ther us...

Page 11: ...r lighting pilot After 30 seconds release control knob Ifcontrolknobdoesnotpopupwhen released contact a qualified service person or gas supplier for repairs Note If pilot goes out repeat steps 3 throu...

Page 12: ...er Light ing Instructions page 11 3 With control knob pressed in strike match Hold match to pilot until pi lot lights 4 Keep control knob pressed in for 30 seconds after lighting pilot After 30 second...

Page 13: ...place front panel MANUAL LIGHTING PROCEDURE Figure 17 Control Knob In The OFF Position Figure 18 Pilot 7 Press in control knob and turn back to PILOT IGN This should cause the piezo ignitor to spark a...

Page 14: ...hermostat models or page 13 for non thermostat models seeTroubleshooting pages 15 through 17 CORRECT FLAME PATTERN AT HIGH POSITION 1 2 G Figure 21 Correct Burner Flame Pattern Yellow Tipping 1 2 G IN...

Page 15: ...as pressure B Dirty 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 b...

Page 16: ...ator 1 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 burner until air is removed from line Have gas line checked by local n...

Page 17: ...ment at top of page 2 Control valve defective 1 Foreign matter between control valve and burner 2 Gas leak SeeWarning statement at top of page 1 Not enough combustion ventilation air OBSERVED PROBLEM...

Page 18: ...x D Heater Includes knobs grill 23 x 18 75 x 7 23 x 18 75 x 7 23 x 26 x 7 23 x 26 x 7 23 x 26 x 7 Carton 26 x 21 x 9 26 x 21 x 9 26 x 28 5 x 9 26 x 28 5 x 9 26 x 28 5 x 9 Weight pounds Heater 21 21 5...

Page 19: ...All States 219 462 7441 1 800 362 6951 FBD 1349 Adams Street Bowling Green KY 421033414 502 846 1199 1 800 654 8534 Four Flags Power Products 1115 Stateline Road Niles MI 49120 4728 616 684 2697 1 80...

Page 20: ...ME NATURAL GAS HEATER ILLUSTRATED PARTS BREAKDOWN THERMOSTAT MODELS FAS 20BB FAS 30BB 7 7 28 2 28 27 22 26 23 19 17 24 25 12 26 21 20 18 9 8 18 16 10 16 13 1 14 14 15 7 29 11 3 4 5 7 6 7 7 24 1 24 2 O...

Page 21: ...ssure Regulator 1 14 L98801 01 L98801 01 Washer 2 15 L98806 01 L98806 01 Self Tapping Screw 2 16 L98115 03 L98115 03 Main Inlet Tube Assembly 1 17 L98123 06 L98123 06 ODS Line Assembly 1 18 L98126 01...

Page 22: ...HEATER ILLUSTRATED PARTS BREAKDOWN NON THERMOSTAT MODELS FA 20BB FA 30BB AND FGH 30NGB 8 8 32 2 32 31 26 30 27 23 17 28 29 10 30 25 24 22 16 13 1 17 22 20 9 16 18 19 14 14 15 8 12 11 33 3 7 4 5 8 6 8...

Page 23: ...Inlet Tube Assembly 1 17 L98123 09 L98123 08 L98123 08 ODS Line 1 18 L98127 01 L98127 01 L98127 01 Lower Gas Outlet Tube Assembly 1 19 L98128 01 L98128 01 L98128 01 Medium Gas Outlet Tube Assembly 1 2...

Page 24: ...he 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 conditio...

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