Heatwagon 2730C Manual

2730C
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 10-12
For your safety: Do not use this heater in
a space where gaso ine or other iquids
having f ammab e vapors are stored.

IMPORTA T I FORMATIO ! 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 OT designed as an Unvented as Fired Room Heater under ANSI-Z21.11.2 and
SHOULD OT 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.
FPA-58 1989 STA DARD FOR THE STORAGE A D
HA DLI G 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 QUESTIO S ABOUT LOCAL REGULATIO S.
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 OT USE THIS HEATER I A SPACE WHERE GASOLI E OR OTHER
LIQUIDS HAVI G FLAMMABLE VAPORS ARE STORED OR USED.
NEVER USE THE HEATER IN SPACES WHICH ARE NOT SUFFICIENTLY SIZED
OR VENTILATED FOR THE HEATER BEING UTILIZED.
CO STRUCTIO HEATER GE ERAL HAZARD WAR I G:
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 I 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. ever 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.
ot 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-13
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-15
Installation and Maintenance Manual
Model 2730C
Construction Heater
342 N. Co. Rd. 400 East • Val araiso, IN 46383
219-464-8818 • 888-432-8924 • Fax [phone]
www.heatwagon.com
WARRA TY
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 rejec-
tion 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.

SPECIFICATIO S
Model o. 2730C
Designed to ANSI Z83.7-1990 Standard Construction Heater
ases: Natural or Propane
Capacity: 2,000,000 Btu/h maximum
Orifice Size: 31 DMS (x125)
Blower: 12,500 CFM; 3 HP; 2 In W.C.S.P.
Electrical Rating: 240V 19 amps, Single Phase
240V 15 amps, Three Phase
480V 7 amps, Three Phase
Minimum Temperature Rating: Minus 40 degrees F
Gas Supply: Inlet Pressure Manifold Pressure
Max PSI Min PSI W.C.
Propane 250 lbs. 5 psi 1”
Natural as 250 lbs. 5 psi 2.5”
(Minimum inlet pressure as low as 9.5” W.C. can be achieved by removing the 1st stage HR1082 regulator)
Inlet Connection:
Model 2730C (LP) 1/2” FNPT
Model 2730C (Nat/Vap Propane) 3/4” FNPT
Maximum Duct Length, Straight:
200 Ft. @ 27” Diameter
Weight (approximate):
440 lbs.
4

I STALLATIO
The Heat Wagon Model 2730C is a direct fired gas heater intended to be used primarily for the tem-
porary heating of building under construction, alteration, or repair. Since all the products of com-
bustion are released into the area being heated, it is imperative that adequate ventilation is provid-
ed. 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 250 psig) will damage the
controls and void the warranty.
5. Connect the hose assembly to the heater gas inlet elbow. The elbow has a 3/4” 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 electrical supply as specified on the rating plate. For
protection against shock hazard the supply cord should be connected directly into a properly
grounded fused disconnect.
8. Replacement parts are available from any Heat Wagon distributor or by calling 1-888-432-8924
for parts information.
CLEANIN
Heater housing may be cleaned with soap and water.
• Place a plastic plug into the 1” pipe inlet on valve train
• Do not get the inside of the control box wet
• Allow heater to dry before connecting to power
• Pay attention to decals so they remain legible
5

PROPER SET UP
( OTE: The 2730C must be specifically set up for the type of available fuel PRIOR to
installation)
Model 2730C with built-in vaporizer. The heater will use 22 gallon of L.P. per hour. Use at least one
500 gal. Liquid withdrawal tank. This will insure 20
hours of continuous operation.
When running unit on Liquid Propane, the heater
must be set up outside of the building, forcing the
heat through a building opening.
•Hose size for Liquid Propane
–up to 25’ 3/8” ID
–up to 50’ 1/2” ID
Keep hose length as short as possible.
Model 2730C, if setup for Vapor Propane withdraws 2,000,000 BTU’s per hour.
Proper Tank sizing is essential. A propane tank can only make X amount of Vapor per hour. With
drawing the vapor at a faster rate will frost the tank and eventually the burner will run out of fuel.
Hose sizing Vapor Propane
•Up to 100’, use 3/4” or larger hose
For Natural as applications you must know the available line pressure and pipe inside diameter.
Call the factory for the proper size of orifice, gas manifold and hose.
Vapor Propane and Natural as Units can be used inside the building or outside.
•Wire heater directly into fused disconnect
Power Supply line sizing:
2730 - 240V - under 75’ 10 ga. 3 conductor
75 ft to 100 ft 8 ga. 3 conductor
2730 - 480V - under 75’ 14 ga. 4 conductor
75 ft to 150 ft 12 ga. 4 conductor
Position heater properly before use.
Install heater in a horizontal position. Clearances required for combustibles and containers.
Front Outlet 12 ft
Intake 2 ft
Sides 2 ft
Top 4 ft
For your safety do not use this heater in a space where gasoline or other liquids, having flammable
vapors, are stored or used.
LARGE PROPA E STORAGE TA K VAPORIZATIO RATE
TA K SIZE: MAXIMUM WITHDRAWAL RATE (BTUH):
40” 30” 20” 0”
500 gallon 480,000 420,000 360,000 300,000
1000 gallon 850,000 740,000 640,000 530,000
6

It is best to provide outside clean air to heater inlet and adequate ventilation to heated areas. The
hose assembly shall be protected from traffic, damage, building materials and contact with hot sur-
faces.
Check all connections for leaks.
Turn off fuel supply and burn out leftover fuel in hose when heater is not in use.
Heater can be ducted up to 200 ft of straight 27” duct. For every 90˚ bend cut the total length in
half.
If the heater is ducted it may be necessary to adjust the air flow switch (located inside control box)
by turning adjusting screw CCW until the light on the control box turns on.
If the heater is equipped with a Hi/Lo Fire Thermostat, place the thermostat inside the area to be
heated, then set desired temperature. Heater will cycle from high to low fire.
I STALLATIO USI G A PROPA E SUPPLY TA K(S)
1) 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, unless
unit is supplied with a built in vaporizer.
2) The heater must be at least 6 ft. from any LP- as container, and not directed toward any LP- as
container with in 20 ft.
3) Minimum Tank Size Outdoor Temperature
500 al. Above +25˚F
2 X 1000 al. +25˚F to + 10˚ F
2 x 1000 al. Below +10˚F
4) 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.
5) Turn off the propane supply valve at the tank(s) when the heater is not in use.
6) 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.
7

COMMO I STALLATIO A D OPERATIO AL PROBLEMS
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
Minimum Size: 1/2” for LP, 3/4” for Natural as.
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
OPERATI G I STRUCTIO S
Model 2730C
ON
1. Turn on fuel supply
2. Turn on the manual shut off valve
3. Turn on the fan switches
4. Turn on the burner switch.
OFF
1. Turn off fuel supply
2. Turn off the burner switch
3. Turn off the fan switch

9
MODEL 2730C
SEQUE CE OF COMPO E T OPERATIO
1) POWER SUPPLY
240/480 Volt wire directly into the fused disconnect.
2) FUSE DISCO ECT SWITCH
Turned on, it sends power to motor relay and to control voltage transformer.
3) CO TROL VOLTAGE TRA SFORMER
Sends power to the 3 amp circuit breaker.
4) 3 AMP CIRCUIT BREAKER
Sends power to the fan switch.
5) FA SWITCH
Sends power to the motor relay holding coil.
6) MOTOR RELAY
Closes, the fan motor starts, there is power at the burner switch.
7) BUR ER SWITCH
In the ON position it sends power to the air flow switch.
8) AIR FLOW SWITCH
It was blown closed by the fan turning, sends power to the ignition control board.
9) IG ITIO CO TROL BOARD
Creates a spark at the igniter and sends power to the high limit switch.
10) HIGH LIMIT SWITCH
Sends power to the gas solenoid valve.
11) GAS SOLE OID VALVE
Opens, sending fuel to the burner (where there is spark).
12) BUR ER
It ignites.
13) IG ITER SE SOR
Sends a flame sensing signal to the ignition control board. The unit is operating.

10
TROUBLE SHOOTI G
OTE: MUST CHECK COMPO E TS I SEQUE CE LISTED
DIRECTIO S: Find the specific symptom. Refer to Sequence of component Operation Guide.
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 and thermostat are O .
• Check sequences 1 through 5 (Page 9)
• Push reset button on Motor Overload Relay
Fan runs, no spark for ignition.
• Check sequences 6 through 9 (Page 9)
• 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 9 through 11 (Page 9)
• Check for gas pressure on the manifold gauge, if gas is present, clean the burner port holes
Flame occurs but burner locks out after a few seconds.
• Check burner ground wire (Bad connections)
• Check sensor wire (Burned wire or bad connection)
• Check igniter/sensor (Replace if probe is rubbery)
• Clean port holes in burner around igniter/sensor
• Replace ignition control board
Flame occurs but trips pressure reset button after 30 to 40 seconds.
• Pressure regulator is set too high.
• Limit switch shuts burner off.
• Adjust pressure regulator to proper setting. (1”W.C. LP Max, 2.5” W.C. Nat. Max)
• Indicator light will glow when proper setting is obtained.
Flame established, but too small.
A: Check for proper pressure at manifold gauge — (if yes)
1. Clean port holes in burner
B: Not enough pressure at manifold gauge.
1. Check fuel supply
2. Check liquid strainer — Filter at the “Y” fitting. (Liquid Propane model only) for restriction
from dirt, oil, etc.
3. Check high pressure regulator for similar restriction.
4. Check gas solenoid valve for similar restrictions.

11
MODEL 2730C
PREVE TATIVE MAI TE A CE
1) Check - Fused disconnect
A) Continuity through fuses.
2) Check - All wiring for tight and correct connections
3) Check - Motor Relay
A) If it buzzes, clean contacts or replace.
B) Check for voltage drop through L1 & T1 contacts. If it’s more than 2 volt replace.
4) Check - Air Flow Switch
A) Clean inlet and negative pressure tubes (Blow out with air)
B) Adjust the switch, turn adjusting screw CCW until the light on the control panel stays on.
5) Clean the burner
A) Clean port holes (gas outlet)
B) Clean air mixture holes (Main burner section)
6) Clean and inspect solenoid valves
A) Remove tops of solenoid valves, clean dirt and propane oil out
B) Inspect diaphragm (Not hard or cracked)
7) Check/Replace the igniter/sensor
A) Move sensor probe with fingers. If “rubbery” replace it.
B) If probe solidly rigid, clean igniter and check gap @ 1/8”
8) Check for gas leaks
A) Heater operating, check for leaks at all pipe joints with leak detector or soapy water. Remake
joints where bubbles occur.
9) Tighten all bolts
A) Motor mounts
B) Fan blade
C) Burner mount
D)Pipe train (manifold) mounts

Model 2730 Series
ITEM PART# DESCRIPTIO
1 HWP HC1069B LID/CONTROL BOX
2 HWP HC1069A CONTROL BOX LID
3 N/S COPPER TUB/AIR SWITCH
4 HWP HP1049 FAN BLADE
5 HWP H 1050A FAN UARD
6 HWP HM1056 MOTOR 1 PHASE
HWP HM1066 MOTOR 3 PHASE
7 HWP HB1077 HEAT SHIELD
8 HWP HB2730 BODY
9 HWP HB1021B BURNER
10 HWP HW1065 WHEEL 12” x 3” x 5/8” HUB
* HWP HD1055 FUSED DISCONNECT (SIN LE PHASE)
* HWP HD1057 FUSED DISCONNECT (THREE PHASE)
* Parts not shown on breakdown
12
2730C Burner Parts List
ITEM# PART# DESCRIPTIO
1 HWP H 1050A FAN UARD SCREEN
2 HWP HP1049 PROPELLER WITH BUSHIN (2730)
3 HM1056 3 HP 1 PHASE MOTOR
4 HWP HB1021B AS BURNER RIN
5 HWP HV1040 VAPORIZER RIN
6 HWP HC1004B I NITER ASSEMBLY
* HWP HM1066 3 HP, 3 PHASE MOTOR
* Parts not shown on breakdown
2730C Control Box
ITEM PART# DESCRIPTIO
1 HWP HS1044 MOTOR RELAY (3Ø)
* HWP HS1044 MOTOR RELAY (1Ø)
2 HWP HS1043B OVERLOAD RELAY (3Ø)
3 HWP HC1017 CONTROL TRANSFORMER
4 HWP HC1004B I NITER (ASSEMBLY)
5 HWP HC1001C D.S.I. CONTROL BOARD
6 HWP HC1010 AIR FLOW SWITCH
7 SFP 2453 HI–LO THERMOSTAT
8 HWP HC1072 TIME DELAY BREAKER
9 HWP HC1019B 3 AMP BREAKER
10 SFP 5989 VOLT METER (150 VOLT)
11 HWP HC1011 BURNER SWITCH
12 HWP HC1011 FAN SWITCH
* HWP HC1012 FAN SWITCH
(2730A/4200 PRIOR 1992)
13 SFP 2505 LI HT
14 PPE 099125-03 NEUTRAL BLOCK
* Parts not shown on breakdown

4
5
67
2
3
3
1
2730C Liquid Pipe Train
ITEM# PART # DESCRIPTIO
1 HWP HV1039 SAFETY RELIEF VALVE
2 HWP HV1042B HOSE ASSEMBLY
3 HWP HV1040 VAPORIZER RIN
4 HWP HV1037 1/2” SOLENOID VALVE L.P.
5 HWP HV1023 1/2" MAN. SHUT-OFF VALVE
6 HWP HV1054 200LB. LIQUID PRESSURE AU E
7 HWP HV1029 1/2" LIQUID STRAINER
8 HWP HV1029B 3/4” Y STRAINER
9 SFP 2538 3/4” BALL VALVE
10 HWP HR1082 RE ULATOR (1/8” ORIFICE)
11 SFP 3455 3/4” SOLENOID VALVE
12 HWP HV1076 HI-LO SOLENOID VALVE
(DRILLED AT 3/16”)
13 HWP HV20SV02B RE ULATOR
14 HWP HV1169 30” W.C. VAPOR PRESSURE AU E
15 SFP 4509 AS PRESSURE LIMIT SWITCH
13
2730C atural
Gas Pipe Train
ITEM# PART # DESCRIPTIO
1 SFP 2538 3/4” BALL VALVE
2 HWP HR1082 RE ULATOR
3 SFP 3455 3/4” SOLENOID VALVE
4 HWP HV1076B 3/4” SOLENOID VALVE HI LO (DRILLED AT 1/4”)
5 HWP HV20SV02B RE ULATOR
6 SFP 4509 AS PRESSURE LIMIT SWITCH
7 HWP HV1169 30 IN. W.C. VAPOR PRESSURE AU E

14
480 Volt 3 PH
240 Volt 3 PH

15
240 Volt 1 PH

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
16