Vanguard VN1800C Owner'S Operation And Installation Manual Download Page 1

®

VENT-FREE NATURAL GAS HEATER

OWNER’S OPERATION AND INSTALLATION MANUAL

Models: VN1800C, VN1800IT, VN3000C, and VN2550IT

Save this manual for future reference.

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.

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Summary of Contents for VN1800C

Page 1: ...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 electrica...

Page 2: ...ea If you have these signs the heater may not be working properly Get fresh air at once Have heater serviced Some people are more affected by carbon monoxide than others These include pregnant women p...

Page 3: ...oxygen depletion sensor ODS pilot light safety system The ODS shuts down the heater if not enough fresh air is available See Fresh Air for Combustion and Ventilation pages 5 through 8 7 Never run hea...

Page 4: ...r 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 ignitor This system requires no matches batteries or other so...

Page 5: ...The air that leaks around doors and windows may provide enough fresh air for combustion and ventilation However in buildings of unusually tight construction you must provide additional fresh air Unusu...

Page 6: ...r Gas furnace ___________________ BTU Hr Vented gas heater ___________________ BTU Hr Gas fireplace logs ___________________ BTU Hr Other gas appliances ___________________ BTU Hr Total ______________...

Page 7: ...or on the wall connecting the two spaces see options 1 and 2 Figure 2 You can also remove door into adjoining room see option 3 Figure 2 WARNING ICON G 001 WARNING Rework worksheet adding the space of...

Page 8: ...en to the outdoors These spaces include attics and crawl spaces Follow the National Fuel Gas Code NFPA 54 ANSI Z223 1 Section 5 3 Air for Combustion and Ventilation for required size of ventilation gr...

Page 9: ...can locate heater on floor away from a wall An optional floor mounting stand is needed Purchasethefloormountingstandfromyourdealer See Accessories page31 WARNING ICON G 001 WARNING Never install the...

Page 10: ...en placed inside the heater for protection during shipping Locating Thermostat Sensing Bulb 1 Remove front panel of heater see Figure 7 page 11 2 Locate thermostat sensing bulb just under the burner a...

Page 11: ...w walls wall areas between studs or to solid walls concrete or masonry Decide which method better suits your needs Either method will provide a secure hold for the mounting bracket INSTALLING HEATER T...

Page 12: ...e is provided with heater Attaching to wall stud method For attaching mounting bracket to wall studs 1 Drill holes at marked locations using 9 64 drill bit 2 Place mounting bracket onto wall Line up l...

Page 13: ...e near bottom on back panel of heater see Figure 14 2 Mark screw locations on wall 3 Remove heater from mounting bracket 4 If installing bottom mounting screws into hollow or solid wall install wall a...

Page 14: ...where trapped matter is not likely to freeze A sediment trap traps moisture and contaminants This keeps them from going into heater controls If sediment trap is not installed or is installed wrong hea...

Page 15: ...In Excess Of 1 2 PSIG 1 Disconnect heater and its individual manual shutoff valve from gas supply piping system Pressures in excess of 1 2 PSIG will damage heater regulator 2 Cap off open end of gas...

Page 16: ...off valve see Figure 15 Apply mixture of liquid soap and water to gas joints Bubbles forming show a leak 4 Correct all leaks at once PRESSURE TESTING HEATER GAS CONNECTIONS 1 Open manual shutoff valve...

Page 17: ...Do not try to light any appliance Do not touch any electric 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 instruct...

Page 18: ...ol knob for 30 seconds This will allow air to bleed from the gas system If thermostat control knob does not pop up when released contact a qualified service person or gas supplier for repairs 6 Keep t...

Page 19: ...When the burners light a whoosh noise will be heard Figure 17 Pilot TO SELECT HEATING LEVEL WARNING ICON G 001 WARNING When running heater set control knob at the 1 2 3 or 4 locked positions Never set...

Page 20: ...VN2550IT Only Since the thermostat measures the temperature of air near the heater cabinet this may not always agree with room temperature depending on housing construction installation location room...

Page 21: ...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 C Use only your hand to push in or turn the gas con...

Page 22: ...rclockwise C clockwise to the PILOT IGN position This will light pilot Note You will hear a loud click when the control knob reaches the PILOT IGN position If pilot does not light turn control knob cl...

Page 23: ...ERATING HEATER Models VN1800C and VN3000C Continued WARNING ICON G 001 WARNING When running heater set control knob at LOW MEDIUM or HIGH locked positions Never set control knob between locked positio...

Page 24: ...ormed Shutting Off Burner Only pilot stays lit 1 Turn control knob clockwise Clockwise to the PILOT position MANUAL LIGHTING PROCEDURE 1 Follow steps 1 through 5 under Lighting Instructions pages 21 a...

Page 25: ...rner Flame Pattern Bad Burner Pattern Plaque GRH OV 019 Figure 25 Incorrect Burner Flame Pattern burner flame pattern If burner flame pattern is incorrect as shown in Figure 25 turn heater off see To...

Page 26: ...ot non thermostat models only When ignitor button is pressed in there is no spark at ODS pilot thermostat models only POSSIBLE CAUSE 1 Ignitor electrode posi tioned wrong 2 Ignitor electrode broken 3...

Page 27: ...n 1 4 turn more 5 A Contact local natural gas company B Clean ODS pilot see Cleaning and Mainte nance page 26 or replace ODS pilot assembly 6 Replace thermocouple 7 Replace control valve 8 Wait one mi...

Page 28: ...Maintenance page 26 or replace 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 desired setting 1 Pr...

Page 29: ...leak See Warn ing statement at top of page OBSERVED 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 combu...

Page 30: ...Type Gas Natural Only Natural Only Ignition Piezo Piezo Pressure Regulator Setting 6 W C 6 W C Inlet Gas Pressure in of water Maximum 10 5 10 5 Minimum 7 7 Dimensions Inches H x W x D Heater 23 5 x 18...

Page 31: ...t supply original replacement part s call DESA International s Parts Department at 1 800 972 7879 for informa tion When calling DESA International have ready model number of your heater the replaceme...

Page 32: ...24 14 17 16 21 18 22 20 19 15 13 ILLUSTRATED PARTS BREAKDOWN Model VN1800IT HEATER EXPLODED VIEW 23 19 23 18 ODS PILOT ASSEMBLY A B C 23 1 23 2 23 3 23 4 23 5 23 7 23 6 23 8 23 12 23 16 23 11 23 15 23...

Page 33: ...9 098271 03 Ignitor Cable 1 20 100614 01 SIT Tube 1 21 100610 01 Inlet Tube 1 22 099211 01 Hex Head Screw 2 23 See Detail Burner Assembly 1 23 1 099218 01 Burner 1 23 2 098508 01 Valve Retainer Nut 1...

Page 34: ...4 8 5 6 7 12 23 9 10 24 14 17 16 21 18 22 20 19 15 13 ILLUSTRATED PARTS BREAKDOWN Model VN2550IT D C 23 1 23 2 23 3 23 8 23 16 23 17 23 11 B A 23 12 23 5 23 6 23 4 23 9 23 7 23 13 23 20 23 10 23 14 23...

Page 35: ...or 1 20 100614 01 SIT Tubing 1 21 100610 01 Inlet Tubing 1 22 099211 01 Hex Head Screw 2 23 See Detail Burner Assembly 1 23 1 099218 03 Burner 1 23 2 098508 01 Valve Retainer Nut 1 23 3 099056 06 Inje...

Page 36: ...8 5 6 7 12 13 9 10 14 16 15 HEATER EXPLODED VIEW ILLUSTRATED PARTS BREAKDOWN Model VN1800C BURNER ASSEMBLY A B C 13 1 13 2 13 3 13 10 13 4 13 5 13 6 13 7 13 8 13 9 13 14 13 13 13 12 13 11 13 15 13 18...

Page 37: ...ssembly 1 13 1 099218 01 Burner 1 13 2 098508 01 Valve Retainer Nut 1 13 3 099056 03 Injector 3 13 4 099048 01 Tubing Valve to Plaque A 1 13 5 099049 01 Tubing Valve to Plaque B 1 13 6 099050 01 Tubin...

Page 38: ...4 8 5 6 7 12 9 10 14 15 16 HEATER EXPLODED VIEW ILLUSTRATED PARTS BREAKDOWN Model VN3000C 13 17 13 16 ODS PILOT E D C 13 1 13 2 13 3 13 9 13 4 13 5 13 7 13 6 13 8 13 10 13 14 13 13 13 12 13 15 13 11 B...

Page 39: ...sembly 1 13 1 099218 02 Burner 1 13 2 098508 01 Valve Retainer Nut 1 13 3 099056 02 Injector 5 13 4 099052 01 Tubing Valve to Plaque B D 1 13 5 099053 01 Tubing Valve to Plaque C 1 13 6 099057 01 Pres...

Page 40: ...es 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 maintenance alteration tamp...

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