Heat Wagon 950H(L) User Manual

950H(L)

C US

Construction
Heater

Installation and Maintenance Manual

Please retain this manual for future reference.

342 N. Co. Rd. 400 East

Valparaiso, IN 46383

219-464-8818 • Fax [phone]

www.heatwagon.com

Revision 7-08

For your safety: Do not use this heater in

a space where gasoline or other liquids

having flammable vapors are stored.

NRTL
ANSI Z83.7
CONST. HTR

IMPORTANT INFORMATION! READ FIRST

The heater is designed for use as a construction heater under ANSI Z83.7a-1993. 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 into 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 AND THE NATURAL GAS AND PROPANE

INSTALLATION CODE, CSA B149.1

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 standard for the storage and handling of liquified petroleum gases, ANSI/NFPA
58 and CSA B149.1, natural gas and propane installation code 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.

FOR YOUR SAFETY

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!

Table of Contents:

Page

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Proper Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Hose Sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Cord Sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Sequence of Component Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Parts Breakdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-16

Installation and Maintenance Manual

Model 950H(L)

Construction Heater

342 N. Co. Rd. 400 East • Valparaiso, IN 46383

219-464-8818 • 888-432-8924 • Fax [phone]

www.heatwagon.com

WARRANTY

All new Heat Wagon and Sure Flame heaters and fans are guaranteed against defective materials and work­manship for one (1) year from 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.

LIMITATIONS

Warrant claims for service parts (wear parts) such as spark plugs, igniters, 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,
and improper electric power, misapplication or evidence of abuse may be cause for rejection of warranty
claims.

Travel time, mileage and shipping charges will not be allowed. Minor adjustments of heaters are dealers’
responsibility. Defective parts must be tagged and held for 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.

DESIGN RELATED SAFETY FEA

TURES

1) FLAME FAILURE
The electronic safeguard control shuts off the gas supply in .8 seconds if flame is lost to
prevent raw gas from leaving the heater.

2) OVERHEATING
The totally enclosed motor is protected by thermal overload. A high temperature limit switch
is mounted in the control box.

3) COMPLETE VISUAL/SELF DIAGNOSIS LIGHTS

4) BLOCKED AIR SUPPLY
An airflow switch detects the differential pressure in the combustion chamber and shuts off
the gas flow when airflow is insufficient.

5) LOCKING GAS SELECTOR LEVER
To avoid over firing of the heater and damage to property, make sure the lever is locked in
position when using propane.

6) LOW SHELL TEMPERATURE
The Model 950HS is designed with a burner heat shield to keep the outside shell cool for
added safety in the work place.

7) DURABLE CONSTRUCTION
The Model 950HS uses a heavy gauge steel housing and a stainless steel burner for long life
and consistent performance.

NOTE: In order to maintain the highly efficient combustion of the heater, the combustion cham­ber must remain as manufactured. Any change or distortion could alter the fuel/air mixture and
create excessive products of combustion.

SPECIFICATIONS

Model No. 950H & 950HL

Designed to ANSI Z83.7-1993 Standard Construction Heater
Gases: Natural or Propane
Capacity: 950,000 Btu/h maximum, 400,000 Btu/h minimum LP

650,000 Btu/h minimum Natural Gas
Orifice Size: 32 DMS (x17)
Blower: 7,000 CFM
Electrical Rating: 120V 60Hz 15 amps, single phase
Minimum Temperature Rating: Minus 20 degrees F

Gas Supply: Inlet Pressure Hi Fire Lo Fire

Max PSI Min PSI W.C. W.C.

Propane 10 1 8.6” 1.4”
Natural Gas 10 3 2.8” 1.4”

Note: Min. Inlet pressure of 9”W.C. can be achieved by removing the 11SV08 Regulator(see page 13, item #4).

Inlet Connection: Maximum Duct Length Straight: 100 ft @ 22” diameter

Model 950HL 1/4” FNPT SP 1” @ 5000 CFM
Model 950H 1-1/4” FNPT Weight (approximate): 360 lbs.

4

INSTALLATION

The Heat Wagon Model 950H(L) is a direct fired gas heater intended to be used primarily for the
temporary heating of building under construction, alteration, or repair. Since all the products of
combustion are released into the area being heated, it is imperative that adequate ventilation is pro­vided. The flow of supply air and combustion gases must not be obstructed in any way.

1. The heater is designed for indoor or outdoor installation in a horizontal position. Allow the
following clearances from any combustible material or fuel containers.

Front Outlet: 20 feet Sides: 2 feet
Intake: 2 feet Top: 4 feet

Also make sure that no flammable vapors are present in the space where the heaters is being used.

2. The heater should be inspected before each use, and at least annually by a qualified service per­son.

3. The hose assembly must be inspected prior to each use of the heater. If it is evident that there is
excessive abrasion or wear, or the hose is cut, it must be replaced prior to the heater being put into
operation. The replacement hose assembly shall be that specified by the manufacturer.

4. When connecting the heater to a natural gas or propane supply line ensure that the pressure at
the heater inlet is within the specified range. Excessive pressure over (14” W.C.) will damage the
controls and void the warranty.

5. Connect the hose assembly to the heater gas inlet elbow. The 950H elbow has a 1-1/4” female
NPT thread, 950HL elbow has a 1/4” female NPT thread. Ensure that the hose assembly is protect­ed from traffic, building materials, and contact with hot surfaces.

6. After installation, check hose assembly for gas leaks by applying a soap and water solution to
each connection.

7. Connect the heater to an adequate 115 volt electrical supply as specified on the rating plate. For
protection against shock hazard the supply cord should be plugged directly into a properly ground­ed three-prong receptacle.

8. Replacement parts are available from any Heat Wagon distributor or by calling 1-888-432-8924
for parts information.

5

EXTENSION CORDS:

Properly Wired and Grounded
Use #14 wire up to 100’
Use #12 wire up to 200’
Use #10 wire up to 300’