Heatwagon 1800 Manual

1800(L)
C US
Construction
Heater
Installation and Maintenance Manual
Please retain this manual for future reference.
342 N. Co. Rd. 400 East
Va paraiso, IN 46383
219-464-8818 • Fax [phone]
www.heatwagon.com
Revision 5-14
For your safety: Do not use this heater in
a space where gaso ine or other iquids
having f ammab e vapors are stored.

IMPORTANT INFORMATION! READ FIRST
The heater is designed for use as a construction heater under ANSI Z83.7a-1993. 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 emer-
gency 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 as Fired Room Heater under ANSI-Z21.11.2 and
SHOU D NOT be used in the home.
ANSI A119.2(NFPA 501C)-1987 Recreational Vehicle Standard prohibits the installation or stor-
age of LP-gas containers even temporarily inside any recreational vehicle. The standard also pro-
hibits the use of Unvented Heaters in such vehicles.
NFPA-58 1989 STANDARD FOR THE STORAGE AND
HAND ING OF IQUEFIED PETRO EUM 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
OCA FIRE SAFETY AUTHORITY IF YOU HAVE QUESTIONS ABOUT OCA REGU ATIONS.
Other standards govern the use of fuel gases and heat producing products in specific applica-
tions. Your local authority can advise you about these.
FOR YOUR SAFETY
DO NOT USE THIS HEATER IN A SPACE WHERE GASO INE OR OTHER IQ-
UIDS HAVING F AMMAB E VAPORS ARE STORED OR USED.
CONSTRUCTION HEATER GENERA 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.
W A R N I N G
Fire, burn, inhalation, and explosion hazard. Keep solid combustibles, such as build-
ing materials, paper or cardboard, a safe distance away from the heater as recom-
mended 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 thin-
ner, 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 888-heatwagon

Table of Contents:
Page
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Proper Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
On-site Safety Problems & Operating Instructions . . . . . . . . . . . . . . . . .7
Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-12
Parts Breakdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-14
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-16
Installation and Maintenance Manual
Model 1800(L)
Construction Heater
342 N. Co. Rd. 400 East • Val araiso, 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 work-
manship 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.
IMITATIONS
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, (R A) for defective parts to be
returned.
No warranty will be allowed for parts not purchased from Heat Wagon.

DESIGN RE ATED SAFETY FEATURES
1) FLAME FAILURE
The electronic ignition control shuts off the gas supply in .8 seconds if flame is lost to prevent
raw gas from leaving the heater.
2) OVERHEATIN
The totally enclosed motor is protected by thermal overload. A manual reset high temperature
limit switch is mounted in the heated air stream.
3) LOW SUPPLY VOLTA E
A panel mounted voltmeter indicates supply voltage before heater start up and also during
heater operation.
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) LOCKIN AS 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 1800(SL) 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 1800(SL) 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 cham-
ber must remain as manufactured. Any change or distortion could alter the fuel/air mixture and
create excessive products of combustion.
SPECIFICATIONS
Model No. 1800 & 1800S
Designed to ANSI Z83.7-1990 Standard Construction Heater
ases: Natural or Propane
Capacity: 750,000 Btu/h maximum
Orifice Size: 36DMS (X18)
Blower: 4,200 CFM
Electrical Rating: 115V 60Hz 15 amps, single phase
Minimum Temperature Rating: Minus 20 degrees F
Gas Supply: Inlet Pressure Manifold Pressure
Max PSI Min PSI W.C.
Propane 50 lbs. 5 PSI 7.0”
Natural as 50 lbs. 5 PSI 7.0”
(Minimum inlet pressure as low as 9.5” W.C. can be achieved by removing 2nd stage 40SV06 regulator)
Inlet Connection: Weight (approximate): 200 lbs.
Model 1800SL 1/4” FNPT Duct Part#: WD2010UTH
Model 1800 3/4” FNPT Maximum Duct ength Straight: 50 Ft. @ 18” Diameter
4

INSTA ATION
The Heat Wagon Model 1800(SL) 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 pro-
vided. 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: 10 feet Sides: 2 feet
Intake: 1.5 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.
See parts list.
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 50 psig) will damage the
controls and void the warranty.
5. Connect the hose assembly to the heater gas inlet elbow. The 1800 elbow has 3/4” Female NPT
thread, 1800SL elbow has a 1/4” Female NPT thread. The hose assembly is supplied with a
swivel connector to avoid kinking or twisting the hose. Use a minimum inside diameter of 1/2”
on LP or 3/4” on natural gas installations. 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 rounded
Use #14 wire up to 100’
Use #12 wire up to 200’
Use #10 wire up to 300’

MODE 1800 & 1800S
PROPER SET UP:
Model 1800SL is a liquid withdrawal unit. This unit
will use 8.25 gal of LP per hour. Use at least (1) 200
gal. withdrawal tank. This will insure 20 hours of
continuous operation. Since the 1800(L) is a Liquid
Propane unit, it must be set up outside of the build-
ing. Use 3/8” or 1/2” LP approved hose or copper
tube.
Model 1800S is a Vapor Propane or Natural as unit.
When using Propane (liquid or vapor) turn the fuel selec-
tor valve (located on the lower manifold) to the Propane
position. When using Natural Gas turn the selector valve
to the Natural Gas position. This unit can be set up
indoors or out.
6
NATURAL GAS QUICK
REFERENCE HOSE
CHART
Hos BTU
L ngth 750,000
in F t <1PSI 1PSI 2PSI 5PSI
10 1-1/2 1 3/4 3/4
25 1-1/2 1 3/4 3/4
35 1-1/2 1 3/4 3/4
50 21 13/4
75 2 1-1/4 1 3/4
100 2 1-1/4 1 3/4
125 2 1-1/4 1-1/4 3/4
150 2 1-1/4 1-1/4 3/4
175 2 1-1/4 1-1/4 3/4
200 2-1/2 1-1/4 1-1/4 3/4
225 2-1/2 1-1/4 1-1/4 3/4
VAPOR PROPANE QUICK
REFERENCE HOSE
CHART
Hos BTU
L ngth 750,000
in F t 1/2PSI 10PSI
10 1 3/4
25 1-1/4 3/4
35 1-1/4 3/4
50 1-1/2 3/4
75 1-1/2 3/4
100 1-1/2 3/4
125 2 3/4
150 2 3/4
175 2 3/4
200 2 3/4
225 2 3/4

7
INSTA ATION USING A PROPANE SUPP Y TANK(S)
1) When installing the heater for use with propane gas, set the gas selector to “Propane”
and lock in position.
2) The propane supply system must be set up for vapor withdrawal from the operating tank(s).
Liquid Propane can cause the heater to overfire and will damage valve train components.
3) The heater must be located at least 6 ft from any LP- as container, and not directed toward any
LP- as container within 20 ft.
4) Minimum Tank Size Outdoor Temperature
500 al. Above +25˚F
1000 al. +25˚F to + 10˚ F
2 x 1000 al. Below +10˚F
5) The installation must conform with local codes, or in the absence of local codes, with the
Standard for Storage and Handling of Liquefied Petroleum asses ANSI/NFPA 58.
6) Turn off the propane supply valve at the tank(s) when the heater is not in use.
7) When the heater is to be stored indoors the propane tank(s) must be disconnected from the
heater and the tank(s) stored in accordance with Chapter 5 of the above National Standard.
COMMON INSTA ATION AND OPERATIONA PROB EMS
1) LOW VOLTA E AT THE HEATER
This is one of the most common problems and is usually the result of the supply cord having
too small a wire gauge for its length, or low voltage at the power source. Low voltage results in
the motor overheating, burnt relay contacts, or a relay that will not make contact. Check
voltmeter on heater before start-up.
2) SUPPLY LINE TOO SMALL
See reference hose chart on page 6.
3) INSUFFICIENT VAPORIZATION AT SUPPLY
Normally caused by undersized supply tank.
4) IMPROPER AS SUPPLY PRESSURE
Usually a result of propane supply pressure being too high because of improper or lack of
regulation or too low of natural gas pressure at meter.
5) DIRTY AS SUPPLY
Dirty gas can cause strainers to plug or form a build-up in the burner orifice.
6) LACK OF PREVENTIVE MAINTENANCE
Heaters must be cleaned as required, especially when used in a dirty environment.
7) IMPROPER SUPPLY OF FRESH AIR
It is strongly recommended that the intake air of the heater be taken from outside the enclosed
area. This provides a slight pressurization and prevents any problems associated with
recirculation of products of combustion.

8
ON-SITE SAFETY PROB EMS
1) SHORTIN OUT OF DEFECTIVE COMPONENTS
This is a very common problem which saves short term expense at the risk of a large future cost.
Any heaters found in this condition should be removed immediately.
2) IMPROPER ENCLOSURES
When heaters are installed partially to the outside for fresh air intake, strict adherence must be
made to the minimum clearance to combustibles given on the instruction plate. Wood framing
around a heater can cause a safety hazard.
3) SUPPLYIN LIQUID PROPANE TO HEATER NOT EQUIPPED WITH A BUILT IN VAPORIZER
This problem has occurred upon initial start-up. To minimize the damage, shut off the gas
supply and let the heater run until all of the liquid in the lines had been consumed.
OPERATING INSTRUCTIONS
1) Set the gas selector valve for fuel being used. Check for proper gas pressure.
2) Open manual shut-off valve on heater.
3) Connect power supply (115 volt). Check voltmeter to confirm full voltage.
4) Slowly open shut-off valve at gas meter or propane tank. Check for leaks.
Bleed air from hose at heater.
5) Set fan and burner switches to “on” position.
6) Set thermostat for desired room temperature.
7) To stop, turn thermostat down or turn fan switch “off”.
(Burner will turn off; after 5 seconds fan will turn off.)
8) Close manual shut-off valve on heater.
NOTE: If the heater will be shut down over night, close valve at fuel supply first and burn all gas out
of line.
The appliance area should be kept clear and free from combustible materials, gasoline, and other
flammable vapors and liquids.
Ensure that the flow of supply air and combustion gases is not obstructed.
The installation and operation of the heater shall comply with the code requirements specified by the
authorities having jurisdiction.
eneral criteria for the use of construction heaters may be found in the applicable sections of
American National Standard A-10.10-1987, Safety Requirements for Temporary and Portable Space
Heating Devises and Equipment Used in the construction industry.
THE INSTA ATION AND MAINTENANCE OF THE HEATER MUST BE ACCOMP ISHED BY A
QUA IFIED SERVICE PERSON.

MODE 1800 & 1800 S
SEQUENCE OF COMPONENT OPERATION
1) POWER SUPP Y
Plug the heater into a 120 Volt grounded receptacle. Power is now at the 20 amp fuse and the 3
amp circuit breaker.
2) 20 AMP FUSE & 3 AMP BREAKER
If the circuit breaker and fuse are good there will be power at the thermostat and at the motor
relay (normally open).
3) THERMOSTAT
When the thermostat calls for heat there will be power at the fan switch.
4) FAN SWITCH
With the fan switch ON it sends power to the burner switch and the control relay.
5) BURNER SWITCH
This sends power to the airflow switch.
6) CONTRO RE AY
After receiving power from the fan switch it closes, sending power to the fan delay timer.
7) FAN DE AY TIMER
Receives power from the control relay and closes. Energizes the motor relays holding coil.
8) MOTOR RE AY
With its coil energized it closes its contacts, sending power to the fan motor.
9) FAN MOTOR
Turns the fan blade causing the air flow switch to close.
10) AIR F OW SWITCH
Received its power from the burner switch and sends the power to the indicator light and the
flame safeguard control.
11) F AME SAFEGUARD CONTRO
This sends power to transformer and the igniter and sends power out to the high temperature
limit switch.
12) HI TEMPERATURE IMIT SWITCH
This switch has normally closed contacts, it sends power to the gas solenoid valve.
13) GAS SO ENOID VA VE
With its coil energized, the valve opens, gas passes through to the burner and ignites.
14) F AME SAFEGUARD CONTRO
This is now sensing flame through the flame rod and the spark stops. The heater is operating.
15) THERMOSTAT
When it is satisfied, the contacts open taking power away from the ignition control, the gas
valve closes, and the fan delay timer is activated.
16) FAN DE AY TIMER
This will operate the fan motor for approximately 10 seconds and turns the fan off.
9

10
PREVENTIVE MAINTENANCE
Heat Wagon Construction Heaters are built to withstand the rigors of operating on construction
sites, for mining applications, and a multitude of other locations where heaters are used. To main-
tain the reliable performance required it is necessary to do a certain amount of regular maintenance.
1) CHECK POWER CORD
A. Insulation not frayed or cracked.
B. round peg is there on male end.
C. Polarity is correct (Black wire on fuse, white wire on motor relay).
2) CHECK A WIRING FOR TIGHT AND CORRECT CONNECTIONS
3) CHECK MOTOR RE AY
A. If it buzzes, clean contacts or replace.
B. Check for voltage drop through L1 or T1 contacts if its more than 2 volts replace.
4) CHECK AIR F OW SWITCH
A. Blow out the inlet tube and negative pressure fitting.
B. Adjust the switch, light on control panel stays on if the heater is bumped and shuts off if
fan inlet is blocked off.
5) C EAN THE BURNER
A. Clean out port holes ( as outlet).
B. Clean air mixture holes.
6) CHECK IGNITER/SENSOR
A. Move sensor probe; if rubbery, replace.
B. If stiff; clean and re-gap at 1/8”
7) CHECK FOR GAS EAKS
A. Operate the heater, (with leak detector or soapy water) check all pipe connections
for leaks.
8) TIGHTEN A BO TS
A. Motor mounts
B. Fan blade
C. Burner mount
D. Pipe train mounts

11
TROUB E SHOOTING
DIRECTIONS: Find the specific symptom. Refer to the Sequence of Component Operation uide.
Check the components listed with a voltmeter for proper operation as described. Replace any com-
ponents not operating correctly.
Fan will not start when fan switch & thermostat are ON.
• Check sequences 1 through 4 (Page 4)
Fan runs, no spark for ignition.
• Check sequences 5, 10 and 11 (Page 4-5)
• Check continuity of igniter leads. Replace if shorted or broken.
• Check igniter for carbon buildup, gap spacing (1/8”), secure mounting.
• Replace igniter if porcelain is cracked or if electrodes are rubbery
Have spark but no flame.
• Check sequences 11,12 and 14 (Page 5)
• Check for gas pressure on the manifold gauge, if gas is present clean the port holes in the burner
Flame occurs but burner locks out after a few seconds.
• Check sequence 1 (Page 4)
• Check for proper polarity of incoming voltage
A) Place one lead of voltmeter on ground and the other lead on the 20 amp fuse
B) Place one lead of voltmeter on ground and the other lead on the neutral or white wire from
power cord. Reading should be “0” volts.
• Check the igniter sensor electrodes, if the porcelain is cracked or the electrodes are rubbery
replace them
• If the 1st 4 steps check, replace the ignition control
Flame occurs but small.
• Check proper pressure at manifold gauge. If yes:
A) Clean port holes in burner
B) Check proper position of gas selector valve (For Natural as)
• Not enough pressure
A) Check fuel supply
B) Check liquid strainer for restriction (1800L)
C) Check for restriction at Hi pressure regulator
D)Check for restriction at solenoid valve
Fan does not shut off when thermostat turns off burner.
• Check for proper wiring on fan delay timer
• Fan should run for 5 to 7 seconds after burner shuts off. Replace fan delay timer if fan runs over
10 seconds.

12
Item# Part # Description
*1 HWP 40SV06 1ST STA E RE ULATOR 3/4” x 1”
2 HWP HV1162 1” LOW PRESSURE RE ULATOR
3 HWP HV1169 15” W.C. LOW PRESSURE AU E
4 HWP HV1032 115V. AS SOLENOID VALVE 1” DIAMETER
5 HWP HV1035 1” BALL VALVE
6 HWP HV1160 1” LOCKIN AS SELECTOR VALVE
HWP HV1032C COIL COVER FOR HV1032
*If you have an 1800L (Liquid Propane Heater) use part
#HR1053 1st stage regulator
1800
VAPOR PIPE TRAIN
125
4
3
6

13
CONTRO S BREAKDOWN
Item# Part # Description
1 SFP 5989 SUPPLY VOLTA E METER (0-150)
2 SFP 2505 INDICATOR LI HT
3 HWP HC1011 FAN ON/OFF SWITCH
4 HWP HC1011 BURNER ON/OFF SWITCH
5 SFP 2453 REMOTE THERMOSTAT
6 HWP HC1016 VAPORIZER RECEPTACLE
7 HWP HC1019B 3 AMP. CIRCUIT BREAKER
8 HWP HC1010 AIRFLOW SWITCH
9 SFP 4512 CONTROL RELAY
10 HWP HC1003A FAN DELAY TIMER
11 SFP 2446 HI H-LIMIT CONTROL
12 HWP HC1001C I NITOR CONTROL BOARD W/TIME DELAY
13 SFP 2436 MOTOR RELAY
14 HWP HC1115 20 AMP. FUSE (SC-20)
15 HWP HC1123 TERMINAL BLOCK
Parts Not Shown
HWP HC1122 FUSE BLOCK
HWP HC1020 POWER CORD
HWP HC1004B ELECTRODE ASSEMBLY
HWP HC1005 I NITION WIRE ASSY. W/FITTIN S
HWP HC1006 FLAME DETECTION WIRE W/FITTIN
14
11
13 15
5
12
9
10
6714 3 2 8

14
Item# Part # Description
1 HWP HV1039 SAFETY RELIEF VALVE
2 HWP HV1137 LIQUID PROPANE SOLENOID VALVE
3 HWP HV1123 MANUAL SHUT-OFF VALVE
4 HWP HV1054 LIQUID PRESSURE AU E
5 HWP HV1129 LIQUID STRAINER
6 HWP HV1140 COIL
7 HWP HV1042B HOSE
8 HWP HR1053 HI H PRESSURE RE ULATOR
1800
IQUID PIPE TRAIN
1
8
2
3
4
6
5
7
Inlet
Please see page 12
Vapor Pipe Train

Item# Part # Description
1 HWP HC1069B LID/CONTROL BOX
2 HWP HC1069A CONTROL BOX W/LID
3 N/S COPPER TUBE/AIR SWITCH
4 HWP HP1161 FAN BLADE
5 HWP H 1167 FAN UARD
6 HWP HM1166 MOTOR 1 HP
7 HWP HB1177 HEAT SHIELD
8 HWP HB1800 BODY
9 HWP HB1171 BURNER
10 HWP HW1164 WHEEL 8”x 1.75” x 1/2” HUB
HWP HW1164B AXLE FOR 1800
Parts Not Shown
HWP HC1122 FUSE BLOCK
HWP HC1020 POWER CORD
HWP HC1004B ELECTRODE ASSEMBLY
HWP HC1005 I NITION WIRE ASSY. W/FITTIN S
HWP HC1006 FLAME DETECTION WIRE W/FITTIN
15
Model 1800(S ) Series

16
*Not - N w F nwal Control
Board

H.W. IGNITER
10 AMP
CIRCUIT BREAKER

HI VOLTAGE
IGNITER
FLAME
CONTROL
BOARD
V1
L1
V2
L2
BGR
E2
S1
HI LIMIT GAS VALVE
110V LIGHT
FAN STARTER
AIR  SWITCH
BURNER SWITCH
12
INPUT
120 VAC
3
LOAD
TC
7 6
FAN DELAY TIMER
AB
5 7
CONTROL
RELAY
FAN SWITCH
THERMOSTAT N.O.
3 AMP BREAKER
20 AMP FUSE
L2
L1
GRD
120V 1PH MOTOR
17

18

19
10 AMP CIRCUIT BREAKER
HI VO LTAGE
IGNITER
V1
L1

V2
L2
BGR
E2
SL
FLAME 
CONTROL
BOARD
H.W. IGNITER
LIQ SOLENOID RECEPTICAL
GAS VALVE
HI LIMIT
BURNER 
SWITCH
AIR 
SWITCH
LOAD
21
DOB
TIMER
13
4
2
CONTROL
RELAY
FAN SWITCH
THERMOSTAT N.O.
3AMP FUSE
GRD
L1
L2
20 AMP FUSE
120V 1PH MOTOR
FAN STARTER
120V LIGHT

20
PROPANE FACTS
LBS Per allon 4.24
BTU Per allon 91,960
BTU Per LB 21,591
BTU Per Cu Ft 2,516
Cubic feet of air
Required to burn 1 Cu Ft propane 23.5
NATURAL GAS FACTS
BTU Per Cu Ft 1040
100,000 BTU = THERM
1 THERM = 100 Cubic Foot
Cu Ft of air required to burn 1 Cu Ft of Natural as 10.5
MISCELLANEOUS
BTU .25 CALORIES
CALORIES 4 BTU’S
PSI 27.7 INCHES
1 HP 2550 BTUH
OPEN FLAME APPROX. 3500˚F
KW 3411 BTU’S
DISCHAR E TEMPERATURE
OF PORTABLE OIL HEATERS 225˚ ABOVE AMBIENT
DISCHAR E TEMPERATURE
OF PORTABLE AS HEATERS 240˚ ABOVE AMBIENT
AMOUNT OF MOISTURE
ADDED TO AIR BY 7 LBS OF WATER
PORTABLE AS HEATER PER 100,000 BTUH