heat wagon VG400 Construction Heater

Specifications

• Model: VG400
• Product Type: Construction Heater
• Manufacturer: Not specified
• Location: 342 N. Co. Rd. 400 East Valparaiso, IN 46383
• Compliance Standards: ANSI Z83.7a-2000, ANSI A119.2(NFPA 501C)-1987, NFPA-58 1989

Product Usage Instructions

Safety Precautions

1. Do not use the heater in spaces where gasoline or other flammable liquids are stored.
2. Ensure the heater is used only in accordance with the provided instructions and standards.
3. Keep combustible materials at a safe distance from the heater.
4. Only individuals capable of understanding and following the instructions should operate the heater.

Intended Use

The VG400 Construction Heater is designed for temporary heating of buildings under construction, alteration, or repair, and for emergency heating purposes. It is not intended for home or recreational vehicle use.

Proper Ventilation

Ensure proper ventilation to vent the products of combustion outside the area being heated.

Maintenance

Regular maintenance and inspection of the heater are essential to ensure safe and efficient operation. Refer to the maintenance manual for detailed instructions.

FAQ

• Q: Can I use this heater in my home?
  • A: No, the VG400 Construction Heater is not designed for home use and should only be used in buildings under construction or repair.
• Q: What should I do if I have questions about local regulations?
  • A: Contact your local fire safety authority for guidance on local regulations regarding the use of construction heaters.
• Q: Is it safe to store propane gas containers inside a recreational vehicle?
  • A: No, according to ANSI A119.2(NFPA 501C)-1987, LP-gas containers should not be stored inside any recreational vehicle.

CAUTION: Do not use this heater in a space where gasoline or other liquids having flammable vapours are stored.

IMPORTANT INFORMATION! READ FIRST

The heater is designed for use as a construction heater under ANSI Z83.7a-2000. Heater is not intended for use in pest remediation. The primary purpose of construction heaters is to provide temporary heating of buildings under construction, alteration, or repair and to provide emergency heat. Properly used, the heater provides safe, economical heating. Products of combustion are vented outside the area being heated. The heater IS NOT designed as an Unvented Gas Fired Room Heater under ANSI-Z21.11.2 and SHOULD NOT be used in the home. ANSI A119.2(NFPA 501C)-1987 Recreational Vehicle Standard prohibits the installation or storage of LP-gas containers even temporarily inside any recreational vehicle. The standard also prohibits the use of Unvented Heaters in such vehicles. NFPA-58 1989 STANDARD FOR THE STORAGE AND HANDLING OF LIQUEFIED PETROLEUM GASES Use of the heater must be in accordance with this Standard and in compliance with all governing state and local codes. Storage and handling of propane gas and propane cylinders must be in accordance with NFPA 58 and all local governing codes. We cannot anticipate every use which may be made for our heaters. CHECK WITH YOUR LOCAL FIRE SAFETY AUTHORITY IF YOU HAVE QUESTIONS ABOUT LOCAL REGULATIONS. Other standards govern the use of fuel gases and heat-producing products in specific applications. Your local authority can advise you about these.

CAUTION

DO NOT USE THIS HEATER IN A SPACE WHERE GASOLINE OR OTHER LIQUIDS HAVING FLAMMABLE VAPORS ARE STORED OR USED.

CONSTRUCTION HEATER GENERAL HAZARD WARNING:

Failure to comply with the precautions and instructions provided with this heater, can result in death, serious bodily injury and property loss or damage from hazards of fire, explosion, burn, asphyxiation, carbon monoxide poisoning, and/or electrical shock. Only persons who can understand and follow the instructions should use or service this heater. If you need assistance or heater information such as an instruction manual, labels, etc., contact your local Heat Wagon dealer or the manufacturer.

WARNING

Fire, burn, inhalation, and explosion hazard. Keep solid combustibles, such as building materials, paper or cardboard, a safe distance away from the heater as recommended by the instructions. Never use the heater in spaces which do or may contain volatile or airborne combustibles, or products such as gasoline, solvents, paint thinner, dust particles or unknown chemicals. Not for home or recreational vehicle use! If you have read this entire manual and you still have questions, please call us at 219-464-8818

WARRANTY

This heater is guaranteed against defective materials and workmanship for one (1) year from the Heat Wagon invoice date. Warranty repairs may be made only by an authorized, trained and certified Heat Wagon dealer. Warranty repairs by other entities will not be considered. Warranty claims must include model number and serial number. Components are guaranteed to the extent of the component manufacturer’s warranty.

LIMITATIONS

Warranty claims for service parts (wear parts) such as spark plugs, igniters, and flame rods will not be allowed. Diagnostic parts such as voltage meters and pressure gauges are not warrantable. Evidence of improper fuel usage, fuel pressures outside of manufacturer’s specification, poor fuel quality, improper electric power, misapplication and/or evidence of abuse may be cause for rejection of warranty claims. Labor, travel time, mileage and shipping charges will not be allowed. Minor adjustments to heaters are the responsibility of the dealer. Defective parts must be tagged and held for a possible return to the factory for 60 days from date of repair. The factory will provide a return goods authorization, (RGA) for defective parts to be returned. No warranty will be allowed for parts not purchased from Heat Wagon.

• 342 N. Co. Rd. 400 East
• Valparaiso, IN 46383
• 219-464-8818
• 888-432-8924
• Fax 800-255-7985
• www.heatwagon.com

WARNING – AIR QUALITY HAZARD

• Do not use this heater for heating human living quarters.

• Use of direct-fired heaters in the construction environment can result in exposure to levels of CO, CO2 and NO2 considered to be hazardous to health and potentially life-threatening.

• Do not use in unventilated areas

• Know the signs of CO and CO2 poisoning

  • Headaches, stinging eyes
  • Dizziness, disorientation
  • Difficulty breathing, feels of being suffocated

• Proper ventilation air exchange (OSHA 29 CFR 1926.57) to support combustion and maintain acceptable air quality shall be provided in accordance with OSHA 29 CFR Part 1926.154, ANSI A10.10 Safety Requirements for Temporary and

• Portable Space Heating Devices and Equipment used in the Construction Industry or the Natural Gas and Propane

• Installation Codes CSA B149.1

  • Periodically monitor levels of CO, CO2 and NO2 existing at the construction site – at the minimum at the start of the shift and after 4 hours.

  • Provide ventilation air exchange, either natural or mechanical, as required to maintain acceptable indoor air quality
    USA 8-Hr Time-weighted average Canada 8-hr time-weighted average (OSHA 29 CFR 1926.55 App A)Worksafe BC OHS Guidelines Part 5.1 and Ontario Workplaces Reg 833

  • CO50 ppm25 ppm

  • CO25000 ppm5000 ppm

  • NO23 ppm (Reg 833)

  • USA – Ceiling LimitCanada STEL (15 minutes Reg 833/1 hour (Short Term Exposure Limit = 15 minutes)WSBC) WorkSafe BC OHS Guidelines Part 5.1 and Ontario Workplaces Reg 833

  • CO100 ppm

  • CO215000 ppm (WSBC)

  • 30000 ppm (Reg 833)

  • NO25 ppm1.0 ppm (WorkSafeBC)

  • 5.0 ppm (reg 833)

• Ensure that the flow of combustion and ventilation air exchange cannot become obstructed.

• As the building “tightens up” during the construction phases ventilation may need to be increased.

SPECIFICATIONS

• Model No. VG400
• Fuels: Vapor Propane or Natural Gas
• Capacity: 400,000 BTU/HR
• Note: Derate input for altitude over 2000 Ft. (609.6 M) by 4% each 1000 Ft. (304.8 M) above sea level.
• Blower: 2,100 CFM1/2” SP
• Electrical Rating: 120 Volts, 10 Amps
• Fuel Consumption: NG-400 CFH / Propane-4.4 GPH
• Gas Connection: 3/4” FNPT
• Remote Thermostat: On/Off
• Max. Discharge Temp.: 200ºF @ 0ºF Ambient
• Duct Size: 12” Dia., 50 ft. max (straight), temp. rating 225ºF min.
• Actual Dimensions: 60”L x 24”W x 45”H
• Shp. Dimensions: 70”L x 33”W x 54”H
• Weight (approximate): 400 lbs.
• Utilize Dedicated 15 Amp Service
• Gas Supply: Inlet Pressure Manifold Pressure Burner Orifice
• Max W.C. Min W.C. W.C.
• Vapor Propane 14” W.C. 9” W.C. 4” .332
• Natural Gas 14” W.C. 9” W.C. 4” .468
• Note: 1 pound per square inch (psi) = 28” W.C. (water column)
• Note: See back page for recommended duct, gas hose and pressure regulators

SAFETY & CAUTION

• Instructions given in this manual and the applicable regulations of the local authorities must be followed.
• The unit may be operated only by those persons who have been instructed in its proper use.
• The unit is to be installed and operated in such a way as to ensure the safety of employees and surroundings.
• Never cover the unit’s air openings.
• Always ensure adequate fresh air supply to the unit.
• Never stand in front of the discharge end of the heater.
• Keep a minimum clearance of 10 feet from the fuel source. Storing and use of liquid fuel must comply with the regulations and instructions given by the local authorities.
• Unit’s emitted noise level at the range of 3 feet: 74 dBA.
• Do not introduce foreign objects into the unit.
• Do not expose the unit to direct water jets.
• All electric cables outside the unit are to be protected against damage.
• Always disconnect the unit from power supply and turn off the gas supply when maintenance or service is being performed.
• IF NOT OPERATED WITHIN THE GUIDELINES OF THESE OPERATING INSTRUCTIONS, THE MANUFACTURER WILL NOT BE HELD RESPONSIBLE AND THE WARRANTY WILL BECOME VOID.

OPERATING INSTRUCTIONS

INSTALLATION

• When transporting, use both lifting eyes located on sides of heater.
• Place the unit on a level and non-combustible surface.
• Minimum clearances from combustibles:
  • outlet, minimum 10 feet
  • sides, minimum 3 feet
  • top, minimum 3 feet
  • flue pipe exhaust minimum 2 feet
• If the unit is placed indoors, secure an adequate fresh air opening for the burner combustion air.
• The unit may not be installed and operated in premises where explosive or combustible fumes or dust are present. Always check the regulations of local authorities.
• Be certain that neither the air inlet nor the air outlet is obstructed.
• FUEL SUPPLY – SWITCHING FROM VAPOR PROPANE TO NATURAL GAS
• For supply pressures greater than 1/2psi
• A regulator must be installed on the heater to ensure that the pressure to the heater does not exceed 1/2 psi inlet pressure. Excessive pressures over 1/2 psi(14” W.C.) will damage controls and void the warranty.
• This heater is shipped set up for vapour propane (unless labelled otherwise). Check for the proper burner orifice in the burner. To change from vapor propane to natural gas see diagram on page 16. Screw off cap(6) and remove spring(8) and propane orifice(9), replace with natural gas orifice(10), install spring and screw on cap.
• Vapor Propane.332
• Natural Gas.468
• Be certain to use adequate hose or pipe size to ensure proper volume and pressure. See Chart Below.

VAPOR PROPANE QUICK REFERENCE HOSE CHART

NATURAL GAS QUICK REFERENCE HOSE CHART

FUEL SUPPLY (CONTINUED)

• For proper propane tank sizing see page 21.
• Visually inspect the hose assembly and ensure that it is protected from traffic, building materials, and contact with hot surfaces. If it is evident that there is excessive abrasion or wear, or the hose is cut, replace it immediately.
• Purge air from line and wait 10 minutes for gas to dissipate.
• After installation, check the hose assembly for gas leaks by applying a water and soap solution to each connection.
• Fuel hose must be UL approved.
• The installation of this heater to a natural gas supply must confirm with all applicable local codes or, in the absence of local codes, with the National Fuel Gas Code ANSI Z223.1/NFPA 54. For vapor propane, refer to standard for Storage and Handling of  Liquified Petroleum Gases ANSI/NFPA 58.

ELECTRICAL

• Electric cable extensions must be connected based on the unit capacity and cable length.
• We highly recommend a dedicated line, 15 amp minimum.
• Confirm voltage at heater connection (105V min.) to ensure proper operation.
• CONTROL BOARD IS POLARITY SENSITIVE (THERE SHOULD BE NO VOLTAGE BETWEEN NEUTRAL AND GROUND).

EXHAUST FLUE PIPE

• The unit is to be connected to a flue pipe with adequate draft, to ensure the proper start and operation of the unit. Refer to page 20.
• The flue pipe and its installation must comply with the regulations and instructions given by the local authorities.
• A flue pipe must be used at all times. You must increase flue peipe diameter if its is longer than 26”

DISCHARGE DUCTING (Warm Air)

• Minimum clearance from combustible materials is 4 inches.
• Use steel ducting or fabric ducting capable of withstanding maximum temperature of 225ºF.
• Maximum length of duct: 50’ (straight).
• Duct diameter: 12”.
• Make sure that the duct is safely and properly fastened to the outlet.
• Avoid sharp bends and corners to ensure maximum air flow and avoid back pressure/heat accumulation in heater.
• Do not exceed 1/2” w.c. of back pressure.
• FAILURE TO COMPLY WITH THESE RECOMMENDATIONS COULD RESULT IN SHUT5

START UP

• Only people trained in the operation and supervision of this heater should operate and maintain the unit.
• Check the unit to make sure that there are no visible defects on the control and safety devices and that the unit has been installed correctly.

1. Check that the control switch on the control box is in position “0” (STOP).
2. Pre-select desired room temperature on the remote thermostat. The temperature must be set higher than the ambient temperature.
3. Open all possible shut-off devices of the fuel supply lines.
4. Turn the control switch on the control box to position “1” (HEATING).
5. When the ambient temperature level is low, the burner switches on automatically. The fan does not switch on until the set temperature (104ºF) of the heat-exchanger has been reached (will take approximately 1-5 minutes).

• After startup, the heater is operated automatically by the room thermostat and governed by all control devices, including the safety limit controls.
• The room thermostat and burner sensor control the running sequences of the burner and the fan sensor controls the fan function.
• Overheat limit reset controls and shuts off the heater (burner) in the case of overheating.
• The unit can also be used for ventilation purposes only, if needed.

1. Turn the control switch on the control box to position “2” (VENTILATION).
2. The unit is now in the continuous ventilating mode.
3. Heating is not possible in this mode.

NOTE: IT IS NORMAL FOR BURNER TO CYCLE ON AND OFF DURING OPERATION (WILL CYCLE WHEN OUTPUT TEMP REACHES 200ºF AT HEATER) SHUT DOWN

• Turn control switch to position “0” (STOP).
• If moving the heater, close fuel supply followed by turning control switch to position “0” (Stop).

Important!

The air supply fan continues running to cool down the combustion chamber/heat exchanger and then stops later. The fan can restart for several times before finally switching off!

WARNING!

UNIT MAY BE UNPLUGGED IN EMERGENCY SITUATIONS ONLY. OTHERWISE, DO NOT STOP THE UNIT BY UNPLUGGING IT. UNIT NEEDS TO COOL DOWN USING ITS OWN FAN. FAILURE TO COMPLY WITH PROPER SHUT- DOWN PROCEDURES CAN CAUSE DAMAGE TO THE COMBUSTION CHAMBER, HEAT EXCHANGER, SAFETY FEATURES AND WILL VOID WARRANTY.\

MAINTENANCE

Prior to starting any maintenance work be sure to disconnect unit from power supply after the unit cools down fully and fan shuts off! To ensure the proper function of the unit, it must be serviced on regular basis. Maintenance can be performed, excluding the control devices and safety limit controls, by an authorized trained & certified Heat Wagon dealer. The control devices and safety limit controls do not need routine maintenance. If these items fail they must be replaced.

• Do not use any aggressive cleaning agents, which are harmful or environmentally unfriendly, when cleaning the unit.
• Do not use water jet when cleaning the unit.
• Pressurized air may be used for maintenance. Be careful not to damage the fan blower wheel with too much pressure (<30 psi).
• Check whether the unit is free from mechanical damage, replace faulty parts as necessary.
• Check fan blower wheel of the fan at regular intervals and clean it with a small brush when needed, especially in a dusty (drywall) environment.
• Check functionality of control and safety devices regularly.
• Have the flue gas values of the burner checked regularly by authorized agents.
• Be sure to store the unit in a dust free and dry place when it is not used for a long period of time. Cover the exhaust flue to prevent entry of foreign objects.\

SERVICE

• The complete unit, including heat exchanger, combustion chamber and burner should be cleaned from dust and dirt after every heating period, at a minimum of once per year.

• Removal of combustion chamber/heat exchanger:
  For proper cleaning of the unit, manufacturer recommends removal of the complete combustion chamber with heat exchanger. Clean combustion chamber and exchanger tube with brush. Vacuum all loose ash and soot. Close all cleaning flanges carefully to avoid damage to gasket material.

• Disassembling of burner:

1. Disassemble four tightening bolts on the combustion chamber flange and remove burner’s mounting flange. Take care not to damage the flange gasket.
2. Pull out the burner. Take care not to damage the burner head and power cable. Clean blower wheel, ignitor electrode and flame sensor.

VG400 TROUBLESHOOTING

Symptom

• 1. Turn the heater to position #1 and nothing happens.

Possible Causes

• * Power supply cord

  • Thermostat
  • The overheat limit switch is tripped
  • 24-volt transformer
  • Burner motor relay
  • Burner sensor
  • Heater control unit (HCU)

Possible Solutions

• Test for 120 volts between L1 and ground on the main terminal block.
• Turn thermostat above ambient temperature.
• Reset switch, located on the right hand corner
• Using a volt meter, check for 24 volts AC between ground and one of the “T” terminals on the Honeywell control. If less than 24 replace transformer.
• Turn on the heater. Check for 120 volts between ground and both black wires on the relay. Relay is located in the burner control box under the flame safeguard control. If less than 105 replace relay.
• On the heater control unit (HCU) disconnect the wires from terminals X10 and X11. Using an ohm meter, check the resistance between the two wires for a reading. Compare to Sensor Resistance Chart page 17. Replace sensor if out of range.
• On the main terminal block, check for 120 volts between terminals 8 and N when the 3-position switch is in the HEAT position. If less than 105 replace HCU.

Symptom

• 2. The burner ignites for 4 seconds then shuts down.

Possible Causes

• Reverse polarity
• Improper gas pressure/volume
• Faulty ignition control
• Faulty flame sensor
• Improper flue sizing

Possible Solutions

• Test for any volts between “N” on the terminal block and ground located in the control box (see page 20). If you have voltage, NOT GOOD – Reverse the wire.
• Test for proper gas pressures. Check for no more than 14” W.C. of inlet pressure and 4” W.C. manifold pressure.
• Check for 24 volts at the “24V” post on the HWP 62790001 Honeywell control on start-up. If present, after 30 seconds the “Valve” post should send 24 volts to the gas valve. If not, then change control.
• Refer to “Flame Sensor Current Check” test on page 16. During the 4-second ignition sequence, your multimeter should read .8 uA D.C. minimum and steady for the 4 seconds. If not, replace the Flame Sensor, if it does, replace the control.
• Refer to page 21 for proper flue pipe sizing.

Symptom

• 3. The heater runs for a little while but shuts down. It won’t come on again until I reset the limit switch.

Possible Causes

• Burner orifice is improperly sized
• Incorrect burner manifold pressure
• Restricted airflow (will trip overheat limit switch)
• Overheat limit switch faulty due to loss of power
• Overheat limit
• Improper flue piping or improper ducting

Possible Solutions

• For propane, use size .332 For natural gas, use size .468 (see page 4 for instructions)
• Use a low pressure gauge (0-15 inches of water column) with a 1/8” NPT inlet. Install gauge in the pressure tap port located on the output side (see page 16) of the gas valve. Run the heater. Adjust the pressure by turning the pressure adjusting screw (located on the input side top of the gas valve) counter clockwise until the gauge reads 4” W.C.
• Check for dirt or ice buildup on the air inlet or blower wheel. If using duct on the air outlet, insure the back pressure does not exceed a static pressure of .5” W.C. Check with low pressure gauge if necessary (0-15 inches of water column). Confirm proper installation of flue pipe
• Adhere to the proper shut down procedures. Power must remain at the unit until it cools down fully. Blower will shut down on its own when cool. Test overheat limit switch for continuity between the two male terminals at room temperature. Replace if overheat limit switch fails test.
• Check for proper installation/restriction in flue piping or discharge duct.
• Refer to page 21 for poper flue piping. Duct (hose) needs to be free of 90º bends.

Symptom

• 4 The heater has a loud rumbling sound.
• 5 Burner motor comes on, but the heater won’t ignite.
• 6 The heater blows black smoke out of the vent stack
• 7 The burner seems to cycle on and off more than it should.
• 8. The burner starts, but the main fan never comeson.
• 9. The burnercontinues to run, but the fan cycles on and off.

Possible Causes

• Air damper setting
• Dirt on burner blower wheel
• Flue pipe setup or flue pipe restrictions
• Gas manifold pressure
• Burner orifice size
• Restrict heat exchanger
• Fuel pressure or volume
• Air inlet damper adjustment
• Ignition electrode
• Electronic igniter
• Burner airflow switch
• Gas valve
• Air damper setting
• Dirt on burner blower wheel
• Improper flue pipe setup or flue pipe restrictions
• Gas manifold pressure
• Incorrect burner orifice size
• Restricted heat exchanger
• Gas manifold pressure
• Dirt on main air blower or improper setup of outlet air duct
• Burner sensor
• Heater Control Unit (HCU)
• Fan sensor
• Heater Control Unit (HCU)
• Blower motor relay
• Gas manifold pressure
• Fuel supply pressure and volume
• Fan sensor
• Heater Control Unit (HCU)

Possible Solutions

• Rough setting at 4-6. Minor adjustments from the rough settings can be made to achieve a smooth sounding burner with no soot from the flue pipe.

• Clean the burner blower wheel with a small brush and compressed air.

• Refer to the flue pipe chart in this manual. (page 21) Check flue for restriction.

• Use a low pressure gauge (0-15 inches of water column) with 1/8” NPT inlet. Install gauge in the pressure tap port located on the output side of the gas valve. Run the heater. Adjust the pressure by turning the pressure adjusting screw (located on the input side top of the gas valve) until the gauge reads 4” W.C. See page 16. Refer to pipe sizing charts in the Heat Wagon Engineering guide, Heater requires 9-14” W.C. inlet pressure. Ensure proper purge procedure (see fuel supply installation).

• For propane, use size .332. For natural gas, use size .468. (see page 4 for instructions)

• Remove flue pipe and use a flashlight to inspect the inside of the heat exchanger. The access panel is located under the heat exchanger. Tilt the heater on the air discharge side, remove the axle, bottom panel and access panel. Clean the inside of the heat exchanger.

• Use a low pressure gauge (0-15 inches of water column) with 1/8” NPT inlet. Install gauge in the pressure tap port located on the output side of the gas valve. Run the heater. Adjust the pressure by turning the pressure adjusting screw (located on the input side top of the gas valve) until the gauge reads 4” W.C. See page 16. Refer to pipe sizing charts in the Heat Wagon Engineering Guide. Heater requires 9-14” W.C. inlet pressure.

• Rough setting at 4-6. Minor adjustments from the rough settings can be made to achieve a smooth sounding burner with no soot from the flue pipe.

• Clean with fine sandpaper. Make sure it is free from buildup or cracks.

• Turn off the gas valve, turn on the burner. Use insulated pliers to hold the ignition wire and short it to ground. Pull the wire away from ground slowly. A rainbow colored arc should travel between the wire and the ground at a distance of 3/8 of an inch for a duration of 4-5 seconds.

• The burner airflow switch will not allow power to the flame safeguard control when it is open. Check the tubes supplying air to the switch for any restrictions. ONLY AS A TEST, wire around the air switch. If this test solves the problem, adjust or replace the switch.

• If there is power at the flame safeguard control and no power out to the solenoid valve, replace the flame safeguard control. Check for continuity between the terminals on the low valve coil.
  Note: No power will be evident the gas valve for the first 35 sec of burner operation (pre-purge time)

• Rough setting at 4-6. Minor adjustments from the rough settings can be made to achieve a smooth-sounding burner with no soot from the flue pipe.

• Clean the burner blower wheel with a small brush.

• Refer to the flue pipe chart in this manual (page 21). Check flue for restriction.

• Use a low pressure gauge (0-15 inches of water column) with 1/8” NPT inlet. Install gauge in the pressure tap port located on the output side of the gas valve. Run the heater. Adjust the pressure by turning the pressure adjusting screw (located on the input side top of the gas valve) counter clockwise until the gauge reads 4” W.C. See page 16. Refer to pipe sizing charts in the Heat Wagon Engineering Guide. Heater requires 9-14” W.C. inlet pressure.

• For propane, use size .332. For natural gas, use size .468. (see page 4 for instructions)

• Remove flue pipe and use a flashlight to inspect the inside of the heat exchanger. The access panel is located under the heat exchanger. Tilt the heater on the air discharge side, remove the axle, bottom panel and access panel. Remove and clean baffles.

• Use a low pressure gauge (0-15 inches of water column) with 1/8” NPT inlet. Install gauge in the pressure tap port located on the output side of the gas valve. Run the heater. Adjust the pressure by turning the pressure adjusting screw (located on the input side top of the gas valve) until the gauge reads 4” W.C. See page 16. Refer to pipe sizing charts in the Heat Wagon Engineering Guide. Heater requires 9-14” W.C. inlet pressure.

• Check for dirt or ice buildup on the air inlet or blower wheel. If using duct on the air outlet, insure the back pressure does not exceed a static pressure of .5” W.C. Check with low pressure gauge.

• On the heater control unit (HCU) disconnect the wires from terminals X10 and X11. Using an ohm meter, check the resistance between the two wires for a reading. Compare to Sensor Resistance Chart page 18. Replace sensor if reading is out of range.

• If all of the above check good, replace the HCU.

• On the heater control unit (HCU) disconnect the wires from terminals X12 and X13. Using an ohm meter, check the resistance between the two wires for a reading. Compare to Sensor Resistance Chart page 18.

• Turn the 3-position main switch to the fan position. If the blower runs, check the fan sensor. If it is good, replace the HCU.

• Turn the 3-position main switch to the fan position. If the relay pulls in, check for voltage between the L1 and L2 terminals. Then check the voltage between terminals T1 and T2. The voltage should be the same. If it is much lower, replace the relay.

• Turn the 3-position main switch to the fan position. Check for voltage between the 2 solenoid coil terminals on the motor relay. If there is no voltage, the over load is bad. Replace the motor and blower assembly.

• Turn the 3-position main switch to the fan position. Check for voltage between terminals T1 and T2 on the motor relay. If the voltage is good, replace the motor

• Use a low pressure gauge (0-15 inches of water column) with 1/8” NPT inlet.Install gauge in the pressure tap port located on the output side of the gasvalve. Run the heater. Adjust the pressure by turning the pressure adjustingscrew (located on the input side top of the gas valve) until the gauge reads4” W.C. See page 16. Refer to pipe sizing charts page 4 in the Heat Wagon Engineering Guide. Heater requires 9-14” W.C. inlet pressure.

• Use a low pressure gauge (0-15 inches of water column) with 1/8” NPT inlet. Install gauge in the pressure tap port located on the input side of the gasvalve. Run the heater. Refer to pipe sizing charts (page 4) in the Heat WagonEngineering Guide. Heater requires 9-14” W.C. inlet pressure.

• On the heater control unit (HCU) disconnect the wires from terminals X12 andX13. Using an ohm meter, check the resistance between the two wires for areading. Compare to Sensor Resistance Chart page 18. If the test fallsout of this range, replace fan sensor.

• Turn the 3-position main switch to the fan position. If the blower runs, and allof the above tests are good, replace the HCU.

For additional technical service, please contact your local Heat Wagon dealer or call 888-432-8924. Please have your model and serial# available when calling.

Heat Wagon VG400 Parts List

ITEM PART# DESCRIPTION

• 1 HWP 2109001 HEATER FRAME
• 2 HWP 2109002 COVER PLATE
• 3 HWP 2109003 SIDE PANELS (2)
• 4 HWP 2109004 REAR HANDLE
• 5 HWP 2109005 BOTTOM PLATE
• 6 HWP 2109006 FLUE COLLAR
• 7 HWP HW1065 WHEEL
• 8 HWP 2109008 WHEEL SHAFT
• 9 HWP 2109009 BURNER CHAMBER ASSEMBLY
• 10, 11 HWP 2109010 FAN GUARD
• 12 HWP 12440 FAN
• 12A HWP SP12440 MOTOR FOR 12440 FAN ASSY.
• 13 HWP 40900 NLA
• 14 HWP 2109014 FORKLIFT EYE
• 15 HWP 120008B BURNER VG400
• 16 HWP 2109016 BURNER COVER
• 17 HWP 211153 OIL PREHEAT COIL
• 22 HWP 41000 MAIN CONTROL BOX
• 23 HWP 2109023 BRACKET, MAIN CONTROL BOX
• 24 HWP 26400 MAIN SWITCH
• 25A HWP 21800 OVERHEAT LIMIT SWITCH(bimetallic)
• 25B HWP 21400** OVERHEAT LIMIT (CAPILLARY)
• 26 HWP 40850 THERMOSTAT BOX

ITEM PART# DESCRIPTION

• 27 HWP 20579 HEATER CONTROL UNIT
• 28A HWP 20581 FAN SENSOR (FOR POS. #27), 4” TUBE
• 28B HWP 20583 FAN SENSOR, 9” TUBE
• 29 HWP 20582 BURNER SENSOR
• 30 HWP HC1020 POWER CORD & PLUG
• 31 HWP 36811 RUBBER GROMMET
• 32 HWP 210938 PLASTIC WINDOW W/BRACKET
• 33 HWP 2109037 12” BLACK OUTLET ADAPTER

NOT SHOWN IN DIAGRAM

• HWP 2436 CONTACTOR
• HWP 46950 CAPACITOR
• HWP 80200 BURNER COVER LATCH
• HWP 2109031 RADIATION SHIELD (UPPER)
• HWP 12000 SMOKE FLUE W/RAIN CAP
• HPW 2109033 RADIATION SHIELD (SIDE)
• HWP 2453 REMOTE THERMOSTAT (w/o cord)
• HWP 100428 GASKET FOR 120008 OR 120008B
• HWP 21724011 FLANGE ADJ. FOR 120008 OR 12008B
• HWP 62438008 LP ORIFICE .332
• HWP 62438011 NG ORIFICE .468
• HWP 40850SS SILICONE SEAL – 40850 THERM. BOX
• ACC 40SV06 OPTIONAL REGULATOR FOR MORE
• THAN 14” W.C.
• HWP 210047 RUBBER EDGE SEAL (SOLD PER FOOT)
• (30 FEET PER HEATER)
• HWP 2109034 WIRE HARNESS, CONTROL TO H.C.U.
• DKV400 DECAL KIT
• 180036 KIT TO CHANGE OVERHEAT LIMIT
• 86800 SILICONE SLEEVE (sold in 4ft. sections)
• HWP F102GG1 BLOWER MOTOR SUPPORT
• ACC WD1225 OPTIONAL DUCT 12”x25’

*Note: Overheat limit switch – New design (capillary tube) S/N M2728-2746, M4769 and greater

WAYNE BURNER PARTS BREAKDOWN

PART# DESCRIPTION

• 1 HWP 62391002 ELECTRODE
• 2 HWP 62387001 ELECTRODE SLEEVES (QTY 2)
• 3 HWP 62390002 FLAME SENSOR
• 4 HWP 62402001 ORIFICE HOUSING
• 6 HWP 62385001 ORIFICE CAP
• 7 HWP 62401001 ORIFICE CAP GASKET
• 8 HWP 62410001 ORIFICE SPRING
• 9 HWP 62438008 .332 PROPANE ORIFICE
• 10 HWP 62438011 .468 NAT GAS ORIFICE
• 11 HWP 62404002 TOP PLATE HOUSING COVER
• 12 HWP 62909001 IGNITION WIRE
• 13 HWP HC1006 FLAME SENSOR WIRE
• 14 HWP 61951001 ELECTRODE BRACKET
• 15 HWP 62419001 CLIP-ELECTRODE BRACKET
• 16 HWP 62575001 BURNER MANIFOLD
• 17 HWP 100968-002 AIR SWITCH BARB FITTING

120 Volt 1

120 Volt 1 PH

ITEM PART# DESCRIPTION

• E1 HWP 41000 MAIN CONTROL BOX
• E2 HWP 40850 THERMOSTAT BOX
• E3 HWP 40900 FAN CONNECTION BOX
• S1 HWP 120021 MAIN SWITCH
• S2 HWP 20579 HEATER CONTROL UNIT,
• B1 HWP 20581 FAN SENSOR (for S4)
• B1 HWP 20583 FAN SENSOR 225MM TUBE
• B2 HWP 20582 BURNER SENSOR (for S5)
• S3 HWP 21800 OVERHEAT LIMIT SWITCH (BIMETALLIC)
• HWP 21400 OVERHEAT LIMIT (CAPILLARY)
• X1 HWP 36701 TERMINAL BLOCK (E1)
• X2 HWP 36100 GROUNDING BLOCK (E1)
• HC1020 POWER CABLE & PLUG
• X4 HWP 180023 TERMINAL BLOCK (E2)
• X5 HWP 180023 TERMINAL BLOCK (E3)
• CI CAPACITOR
• TH INTERNAL THERMAL PROTECTOR

EXHAUST FLUE PIPE GUIDELINES

CAPACITY OF TYPE B DOUBLE-WALL VENTS SERVING A SINGLE DRAFT HOOD-HEATER x 1000 BTU’S FOR INDOOR APPLICATIONS F

• The flue pipe is to be made of non-combustible material and clearances from combustible materials must be a minimum 8 inches (temperature of flue gases is approximately 410º F). Flue pipe must be used at all times! For flue pipe lengths over 21”, you must increase the flue pipe diameter. See chart below:

NOTE: USE FOLLOWING MULTIPLIERS FOR OTHER AIR TEMPERATURES

• For -10º F multiply x 0.50
• For + 10ºF multiply x 1.5
• For +20ºF multiply x 2.0
• For +40ºF multiply x 3.0
• For +50ºF multiply x 3.5
• For +60ºF multiply x 4.0

Optional Accessories

Note: If your incoming gas supply pressure is greater than 1/2 psi you will need a regulator to reduce the incoming pressure before installation to heater.

REGULATOR

40SV06 Handles up to 60 psi For NG pressure 1-5 lbs. Call Heat Wagon

GAS HOSE

7525 – 3/4” x 25’ CSA certified for NG and Propane Female Swivel Fittings

Included

PRESSURE GAUGE

HV1169 W.C. 0-15” 1/4” MNPT

ACC-INSTKIT

Everything you need for installation ofpropane tank to heater. (Includes 25’ of 3/4” hose)

We Stock A Complete Line Of Parts & Accessories

DUCTING

• WD1220 – 12” x 20’

• WD1225 – 12” x 25’

HOSES

• 7525 – 3/4” x 25’

  7550 – 3/4” x 50’

  1025 – 1” x 25’

  1050 – 1” x 50’

REGULATORS

• 40SV06 – Max incoming pressure 60psi

342 N. Co. Rd. 400 East

• Valparaiso, IN 46383
• 219-464-8818 • Fax 219-462-7985
• www.heatwagon.com

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