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13

107297

OWNER’S MANUAL

OPERATING
HEATER

Continued

THERMOSTAT MODELS FBS-3C
AND FBS-5C

FOR YOUR SAFETY

READ BEFORE

LIGHTING

A. This appliance has a pilot which must

be lighted by hand. When lighting the
pilot, follow these instructions exactly.

B. BEFORE LIGHTING smell all

around the appliance area for gas. Be
sure to smell next to the floor because
some gas is heavier than air and will
settle on the floor.

WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric 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 sup-

plier, call the fire department.

C. Use only your hand to push in or turn

the gas control knob. Never use tools.
If the knob will not push in or turn
by hand, don’t try to repair it, call a
qualified service technician or gas
supplier. Force or attempted repair
may result in a fire or explosion.

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 replace any part
of the control system and any gas con-
trol which has been under water.

 WARNING: If you do not fol-

low these instructions exactly, a
fire or explosion may result caus-
ing property damage, personal
injury or loss of life.

LIGHTING

INSTRUCTIONS

1.

STOP! Read the safety information,
column 1.

2.

Make sure equipment shutoff valve
is fully open.

OFF

ON

PILOT

IGN

1

7

3

5

4

6

2

Figure 21- Dual Control for Thermostat
Models  FBS-3C and FBS-5C

Continued

Figure 22 - Pilot

Ignitor Electrode

Pilot Burner

Thermocouple

OFF

ON

PILOT

IGN

1

7

3

5

4

6

2

OFF

ON

PILOT

IGN

1

7

3

5

4

6

2

Figure 23 - Burner Patterns

Temperature

Control

Setting Knob

Knob

FBS-3C

FBS-5C

ON

OFF

3.

Push in control knob slightly and turn
clockwise 

 to the OFF posi-

tion. Be sure that the temperature set-
ting knob is set at the line between
level 1 and level 7 (see Figure 21).

4.

Wait five minutes to clear out any
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP! Follow “B” in the safety in-
formation in column 1. If you don’t
smell gas, go to the next step.

5.

Push in and turn control knob coun-
terclockwise 

 to PILOT po-

sition. Press in control knob for  five
(5) seconds.

Note:

 You may be running this

heater for the first time after hook-
ing up to gas supply. If so, you may
need to press in control knob for 30
seconds. This will allow air to bleed
from the gas system.

6.

Release downward pressure on con-
trol knob and turn clockwise 
to OFF position.

7.

Press in control knob and turn coun-
terclockwise 

 past IGN to PI-

LOT (see Figure 21). This will cause the
piezo ignitor to spark and light the pilot
gas. Keep control knob depressed for
10 seconds before releasing. If needed,
repeat steps 5 through 7 until pilot lights.

Note:

 If pilot does not stay lit, refer

to Troubleshooting, pages 15 through
17.  Also contact a qualified service
person or gas supplier for repairs.
Until repairs are made, light pilot with
match. To light pilot with match, see
Manual Lighting Procedure, 
page 14.

8 . When pilot is lit, turn the control

knob to ON position (see Figure 23).

9.

To select desired heating level, turn
the temperature setting knob coun-
terclockwise 

 between 1 and

7 (see Figure 23).

TO TURN OFF GAS

TO APPLIANCE

Shutting Off Heater

1.

Turn control knob clockwise 
to the OFF position.

2.

Turn off all electric power to the ap-
pliance if service is to be performed.

Shutting Off Burner Only (pilot
stays lit)

Turn control knob clockwise 

 to

the PILOT position.

Summary of Contents for FBS-3B

Page 1: ...ed 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 o...

Page 2: ...ir ven tilation to run properly This heater has an Oxygen Depletion Sensing ODS safety shutoff system The ODS shuts down the heater if not enough fresh air is available See Fresh Air for Combus tion a...

Page 3: ...safety 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 i...

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...

Page 5: ...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 of Btu...

Page 6: ...ce 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...

Page 7: ...ing heater in rooms 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...

Page 8: ...WARNING 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 p...

Page 9: ...ocations 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 4 Tigh...

Page 10: ...ts 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 regulator with wrench when connecting it...

Page 11: ...gas joints Bubbles forming show a leak 5 Correct all leaks at once 6 Light heater see Operating Heater column 3 and page 12 for non thermo stat models pages 13 and 14 for ther mostat models Check the...

Page 12: ...qualified 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...

Page 13: ...OFF ON PILOT IGN 1 7 3 5 4 6 2 Figure 23 Burner Patterns Temperature Control Setting Knob Knob FBS 3C FBS 5C ON OFF 3 Pushincontrolknobslightlyandturn clockwise to the OFF posi tion Be sure that the...

Page 14: ...Turn Off Gas to Ap pliance page 12 for non thermostat mod els or page 13 for thermostat models see Troubleshooting pages 15 through 17 Figure 25 Incorrect Pilot Flame Pattern GRH OV 009 GOOD PILOT Fi...

Page 15: ...ally 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 i...

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

Page 17: ...OBLEM 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 V...

Page 18: ...n KY 42103 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 co...

Page 19: ...omthe 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 will have delayed i...

Page 20: ...97 INFRARED PROPANE LP GAS HEATER 26 19 25 25 24 7 2 7 1 20 21 22 23 3 4 See Detail ILLUSTRATED PARTS BREAKDOWN FB 3B Burner Assembly 11 10 6 16 7 9 14 7 13 12 8 17 15 5 4 18 18 18 5 1 5 2 ODS Pilot A...

Page 21: ...98411 01 Ignitor Line 1 10 L98028 01 Control Valve 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 L98123 02 ODS...

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

Page 23: ...1 12 L98059 01 Control Valve Main Inlet Nut 1 13 L98115 01 Main Inlet Tube Assembly 1 14 L98123 01 ODS Gas Line Assembly 1 15 L98116 01 Burner Gas Line Assembly C 1 16 L98117 01 Burner Gas Line Assem...

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

Page 25: ...tor Bracket 1 12 L98057 01 4 Way Connector Fixed Nut 1 13 L98411 01 Ignitor Line 1 14 L98071 04 ODS Pilot 1 14 1 098514 01 Thermocouple 1 14 2 L98071 07 Ignitor Electrode 1 15 L98072 01 ODS Mounting B...

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

Page 27: ...Assembly 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 14 17 L98123 03 ODS Gas Line Assembly 1 18 L98116 02 Bu...

Page 28: ...shed 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...

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