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105735

OWNER’S MANUAL

 WARNING : If you smell gas

• Shut off gas supply.
• 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.

IMPORTANT:

 Operating heater where impurities in air exist may create odors. Cleaning

supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles,
etc., create fumes. These fumes may mix with combustion air and create odors.

POSSIBLE CAUSE

1. Metal expanding while heating or con-

tracting while cooling

1. Heater burning vapors from paint, sol-

vents, glues, etc. See 

IMPORTANT

statement above

2. Gas leak. 

See Warning statement

above

1. Not enough fresh air is available
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

1. Not enough combustion/ventilation air

OBSERVED PROBLEM

Heater produces a clicking/ticking noise
just after burner is lit or shut off

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/condensation noticed on windows

REMEDY

1. This is common with most heaters. If

noise is excessive, contact qualified ser-
vice person

1. Ventilate room. Stop using odor caus-

ing products while heater is running

2. Locate and correct all leaks (see Check-

ing Gas Connections,  page 10)

1. Open window and/or door for ventilation
2. Contact local natural gas company
3. Clean ODS/pilot (see Cleaning and

Maintenance, page 12)

1. Locate and correct all leaks (see Check-

ing Gas Connections,  page 10)

2. Replace control valve

1. Take apart gas tubing and remove for-

eign  matter

2. Locate and correct all leaks (see Check-

ing Gas Connections,  page 10)

1. Refer to Air for Combustion and Venti-

lation requirements (page 4)

TROUBLESHOOTING

Continued

Содержание MBN20LB

Страница 1: ...ervice agency or the gas supplier MBN20LB 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...

Страница 2: ...lot light safety 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 heat...

Страница 3: ...al Fire Protection Association Inc Batterymarch Park Quincy MA 02269 UNPACKING 1 Remove heater from carton 2 Remove all protective packaging ap plied to heater for shipment 3 Check heater for any ship...

Страница 4: ...ating 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 ar...

Страница 5: ...el burning appliances in the space Vent free heater ___________________Btu Hr Gas water heater ___________________Btu Hr Gas furnace ___________________Btu Hr Vented gas heater ___________________Btu...

Страница 6: ...FPA 54 ANS Z223 1 Section5 3 AirforCombustionand Ventilation for required size of ventilation grills or ducts IMPORTANT Do not provide openings for inlet or outlet air into attic if attic has a thermo...

Страница 7: ...furniture clothing or other flammable objects are less than 36 inches from the front top or sides of the heater as a fireplace insert in high traffic areas in windy or drafty areas You can locate mode...

Страница 8: ...acing Heater On Mounting Bracket 1 Locate two horizontal slots on back panel of heater 2 Place heater onto mounting bracket Slide horizontal slots onto stand out tabs on mounting bracket INSTALLATION...

Страница 9: ...is will prevent excess sealant from going into pipe Excess sealant in the pipe could result in clogged heater valves Typical Inlet Pipe Diameters 20 000 Btu Hr models 3 8 or greater 30 000 Btu Hr mode...

Страница 10: ...gas supply Check reconnected fittings for leaks TestPressuresEqualToorLessThan 1 2 PSIG 1 Close manual shutoff valve see Fig ure 13 2 Pressurize supply piping system by ei ther using compressed air or...

Страница 11: ...rol knob pressed in for five 5 seconds see Figure 15 Note You may be running this heater for the first time after hook ing up to gas supply If so the con trol knob may need to be pressed in for 30 sec...

Страница 12: ...ect Pilot Flame Pattern BURNER FLAME PATTERN Figure 19 shows a correct burner flame pattern Figure20showsanincorrectburner flame pattern The incorrect burner flame patternshowsyellowtippingoftheflame...

Страница 13: ...t flame to go out This problem 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 1 Burner orifice...

Страница 14: ...er blocked 4 Dirty or partially clogged burner orifice 1 When heated vapors from furniture pol ish wax carpet cleaners etc turn into white powder resdue REMEDY 1 Clean burner see Cleaning and Mainte n...

Страница 15: ...Control valve defective 1 Foreign matter between control valve and burner 2 Gas leak See Warning statement above 1 Not enough combustion ventilation air OBSERVED PROBLEM Heater produces a clicking tic...

Страница 16: ...heater will not produce specified heat When Gas Quality Is Bad pilot will not stay lit burner will produce flames and soot heater will backfire when lit You may feel your gas pressure is too low or g...

Страница 17: ...00A Includes ON OFF switch Note Use only original replacement parts Thiswillprotectyourwarrantycoveragefor parts replaced under warranty PARTS UNDER WARRANTY Contact authorized dealers of this product...

Страница 18: ...18 105735 VENT FREE NATURAL GAS HEATERS BLUE FLAME MBN20LB 12 1 12 2 ODS Pilot 1 2 3 4 5 6 8 8 9 10 10 11 12 13 14 17 19 25 21 23 24 7 22 27 26 20 16 18 15 MBN20LB ILLUSTRATED PARTS BREAKDOWN...

Страница 19: ...49 01 Nut M5 2 12 100701 01 ODS Pilot Assembly 1 12 1 098514 01 Thermocouple 1 12 2 098594 01 Ignitor Electrode 1 13 103446 01 Burner 1 14 099387 05 3 16 Pilot Tubing 1 15 103845 06 Injector 1 16 0990...

Страница 20: ...hed 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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