heat wagon P1800 Electric Construction Heaters Instruction Manual

June 2, 2024
Heat Wagon

heat wagon P1800 Electric Construction Heaters

eat-wagon-P1800-Electric-Construction-Heaters-FIG-1

Product Information

Specifications

Model Heat Output (Max BTU’s) Watts (Max) Electrical Rating Air Flow
P600 65,000 (First Stage), 41,000 (Second Stage), 65,000 (Third
Stage) 6,000 (First Stage), N/A (Second & Third Stage) 208V, 25A (First
Stage), 25A (Second Stage) 250 CFM (425 Cu. m/hr)
P900 30,700 (First Stage), 30,700 (Second Stage) 9,000 (First & Second
Stage) 208V, 38.0A (First & Second Stage) 350 CFM (600 Cu. m/hr)
P1800-1 N/A 18,000 (First, Second & Third Stage) 208V, 75A (First & Third
Stage), N/A (Second Stage) N/A
P1800-3 N/A 18,000 (First & Second Stage) 208V, 50A (First & Second Stage)

N/A
P1800D| 65,000 (First Stage), 41,000 (Second Stage), 65,000 (Third
Stage)| 18,000 (First, Second & Third Stage)| 208V, 50A (First & Second Stage), N/A (Third Stage)| N/A

Product Usage Instructions

Safety Instructions:

  1. Avoid touching hot surfaces with bare skin. Always use the handle when moving the heater.
  2. Keep combustible materials at least 6 feet away from the front of the heater and ensure clearance around the sides and rear.
  3. Do not leave the heater unattended, especially around children or individuals who may not be able to react to the heat properly.
  4. Always unplug the heater when not in use.

General Instructions:

  1. Do not use the heater if the cord or plug is damaged.
  2. Avoid using the heater near flammable liquids or materials.
  3. Do not operate the heater in confined spaces or around individuals with reduced capabilities.
  4. Plug the heater directly into a wall outlet.

Hyperthermia Warning:

  1. Hyperthermia can lead to serious health issues. If you experience symptoms like high body temperature, seek medical attention immediately.
  2. Avoid leaving the product running unattended in confined spaces with vulnerable individuals.

Additional Information:
Always follow the instructions provided in the manual for safe and effective use of the heater. Any misuse may result in fire, electric shock, or injury.

Frequently Asked Questions (FAQ)

  • Can I use this heater outdoors?
    No, this heater is designed for indoor use only. Using it outdoors can pose safety risks.

  • What should I do if the cord or plug is damaged?
    Do not operate the heater and have it repaired by a certified technician before further use to avoid any hazards.

IMPORTANT INSTRUCTIONS

READ ALL INSTRUCTIONS BEFORE USING THIS HEATER

  1. This heater is hot when in use. To avoid burns, do not let bare skin touch hot surfaces. Use handle when moving this heater. Keep combustible materials at least 6 feet (2 meter) from the front of the heater and keep them away from sides and rear

  2. Extreme caution is necessary when the heater is used near children or invalids and whenever the heater is left unattended

  3. Always unplug the heater when not in use

  4. Do not operate any heater with a damaged cord or plug or after the heater malfunctions, has been dropped or damaged in any manner. Return heater to authorized service facility for examination, electrical or mechanical adjustment or repair

  5. Do not use outdoors
    6. This heater is not intended for use in bathrooms, laundry areas and similar indoor locations. Never locate the heater where it may fall into a bathtub or other liquid container

  6. Do not run cord under carpeting. Do not cover cord with throw rugs, runners, or the like. Arrange cord away from traffic area and where it will not be tripped over

  7. TO DISCONNECT HEATER, reduce ambient thermostat to zero. Fan will continue to run (P1800,4000,6000) until unit cools and shuts down automatically, turn switches off, disconnect power. For P600, P900 let fan run one minute then after cooldown, turn switch off, disconnect power.

  8. Connect to properly grounded outlets only

  9. Do not insert or allow foreign objects to enter any ventilation or exhaust opening as this may cause an electric shock or fire, or damage the heater

  10. To prevent a possible fire, do not block air intakes or exhaust in any manner. Do not use on soft surfaces, where openings may become blocked

  11. A heater has hot and arcing or sparking parts inside. Do not use in areas where gasoline, paint or flammable liquids are used or stored

  12. Do not point to flammable materials

  13. Use heater only as described in this manual. Any other use not recommended by the manufacturer may cause fire, electric shock or injury to persons

  14. Always plug heaters directly into a wall outlet/receptacle. Never use with an extension cord or relocatable power tap (outlet/power strip)

  15. Hyperthermia can result in death. Symptoms of hyperthermia include high body temperature, headache, nausea, vomiting, tiredness, dizziness, fainting, and rapid pulse. If you begin to experience symptoms related to hyperthermia, turn off the heater and seek medical attention.

  16. To avoid excessive room temperatures which can cause hyperthermia: DO NOT leave product running unattended in a confined space around infants, or individuals with reduced physical, sensory, or mental capabilities.

  17. SAVE THESE INSTRUCTIONS

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

  • Evidence of 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.
  • Heater is not intended for use in pest remediation.

SPECIFICATIONS

  P600 P900 P1800-1 P1800-3 P1800D P4000 P6000
Heat Output (Max BTU’s) 20,500 30,700 65,000 65,000 65,000 136,000

204,700
(First Stage)| 20,500| 30,700| 41,000| 41,000| 41,000| 51,200| 81,864
(Second Stage)| N/A| N/A| 65,000| 65,000| 65,000| 102,400| 163,728
(Third Stage)| N/A| N/A| N/A| N/A| N/A| 136,500| 204,606
Watts (Max)| 6,000| 9,000| 18,000| 18,000| 18,000| 40,000| 60,000
(First Stage)| N/A| 9,000| 12,000| 12,000| 12,000| 16,000| 24,000
(Second Stage)| N/A| N/A| 18,000| 18,000| 18,000| 32,000| 48,000
(Third Stage)| N/A| N/A| N/A| N/A| N/A| 40,000| 60,000
Electrical Rating| 240V 60Hz 1Ø| 240V 60Hz 1Ø| 240V 60Hz 1Ø| 240V 60Hz 3Ø| 240V 60Hz 3Ø| 480V 60Hz 3Ø| 480V 60Hz 3Ø
Min. Voltage at Heater| 208| 208| 208| 208| 208| 440| 440
Amp Draw (Max)| 25| 38.0| 75| 50| 50| 50| 75
(First Stage)| 25| 38.0| 50| 34| 34| 20| 30
(Second Stage)| N/A| N/A| 75| 50| 50| 40| 60
(Third Stage)| N/A| N/A| N/A| N/A| N/A| 50| 75
Air Flow| 250 CFM| 350 CFM| 590 CFM| 590 CFM| 940 CFM| 1,800 CFM| 1,800 CFM(1,000 Cu. m/hr)
 | (425 Cu. m/hr)| (600 Cu. m/hr)| (1,000 Cu. m/hr)| (1,000 Cu. m/hr)| (1,590 Cu. m/hr)| (3,000 Cu. m/hr)| (3,000 Cu. m/hr)
Ambient Thermostat| 32 to 100°F| 32 to 100°F| 32 to 100°F| 32 to 100°F| 32 to 100°F| 32 to 100°F| 32 to 100°F
Weight| 32.9 lbs| 48 lbs| 62 lbs| 62 lbs| 62 lbs| 130 lbs| 142 lbs
Ducting (Max)| N/A| N/A| N/A| N/A| 12″ x 50′ (straight)| 14″ x 50′ (straight)| 14″ x 50′ (straight)
 |  |  |  |  | Duct PN-WD1225| Duct PN-WD1425| Duct PN-WD1425
 |  |  |  |  | 12”x25’ Long| 14”x25’ Long| 14”x25’ Long
Temp Rise

(from 0ºF ambient)

| 100ºF| 100ºF| 100ºF| 100ºF| 100ºF| 100ºF| 100ºF
dB Noise| 53 dB(A) 1m| 55 dB(A) 1m| 58 dB(A) 1m| 58 dB(A) 1m|  | 82 dB(A) 1m| 82 dB(A) 1m
UL LIsted| Yes| Yes| Yes| Yes|  | Yes|
Dimensions| 20″L x 12″W x 17″H| 23″L x 12″W x 18″H| 30″L x 14″W x 20″H| 30″L x 14″W x 20″H| 30″L x 14″W x 20″H| 46″L x 20″W x 25″H| 46″L x 20″W x 25″H

PRINCIPAL OF OPERATION P600, P900, P1800-1, P1800-3

eat-wagon-P1800-Electric-Construction-Heaters-FIG-3

PRINCIPAL OF OPERATION P4000, P6000

eat-wagon-P1800-Electric-Construction-Heaters-FIG-4

OPERATION

REVIEW AND UNDERSTAND ALL WARNINGS IN THIS MANUAL. THEY ARE ESSENTIAL FOR SAFE USE OF THE HEATER. FOLLOW ALL LOCAL CODES.

To start heating:

  1. Place the heater on a stable, level surface. Make sure that no explosive or combustible fumes or dust are present. See that the heater is not exposed to water spray, rain, or dripping water.
    Minimum clearances from combustible materials:

    • Outlet: 6 feet, Sides: 1 foot, Top: 2 feet, Rear: 2 feet
    • Floor: combustible
  2. Connect heater to proper power source. The P600 requires a 240V, 60Hz single phase 25 Amp power source. The P900 requires a 240V, 60Hz single phase, 40 Amp power source. The P1800-1 requires a 240V, 60 Hz single phase, 75 Amp power source. The P1800-3 requires a 240V, 60 Hz three phase, 50 Amp power source. The P4000 requires a 480V, 60 Hz three phase, 50 Amp power source. The P6000 requires a 480V three phase, 75 Amp power source. Also, ALL POWER SOURCES NEED TO BE EQUIPPED WITH A CIRCUIT BREAKER!
    Note: When power is first applied to unit, the heater fan may blow air out of heater INLET. If this condition occurs, (after first removing power from cord) reverse the first two hot wires at heater terminal inlet block. (3 Phase Models Only)

  3. Set the remote thermostat to a temperature above the ambient room temperature by turning the knob. NOTE: The heater will start only if the thermostat “calls for heat” meaning that it is set to higher than prevailing ambient temperature.

  4. Set the selector switch to the desired heating setting. For the P1800 series, the options are #1 for ventilation (fan only), #2 for low heat output of 12Kw (41,000 Btu’s), or #3 for high output of 18Kw (65,000 Btu’s).

    • For the P4000, the switches are labeled S1 with a heat output of 16Kw (54,600 Btu’s), S1 and S2 with a heat output of 32Kw (109,200 Btu’s) or S1, S2 and S3 with a heat output of 40Kw (136,000 Btu’s).
    • For the P6000, the switches are labeled S1 with a heat output of 24Kw (81,900 Btu’s), S1 and S2 with a heat output of 48Kw (163,800 Btu’s) or S1, S2 and S3 with a heat output of 60Kw (204,700 Btu’s).
    • The heater will now operate automatically, controlled by the thermostat.

To Stop Heating: (P1800, P4000, P6000)

  1. Turn all switches to “Off”.
  2. Allow fan to run until unit stops automatically, controlled by unit cooldown thermostat (fan switch). Heater may cycle more than once.
  3. Unplug the power supply cable after the fan has stopped cooling down the heater completely.

To Stop Heating: (P600, P900)

  1. Reduce ambient (room) thermostat to “Heat Off” position.
  2. Allow fan to run for at least two minutes.
  3. Flip switch to “Off” position.
  4. Unplug heater.
    NOTE: The heater is equipped with an overheat limit switch which may cause the heater to stop. Check and remove the cause for overheating before re-starting.

MAINTENANCE

Never service heater while it is plugged in, running or hot. Severe bodily injury or electric shock may occur.
Only qualified persons are allowed to open heater for service.

  1. Keep heater clean (ex. dry wall dust). Use pressurized air to blow fan blades clean.
    NOTE: Use moderate pressure to avoid damage to fan blades.

  2. Inspect heater before and after each use.

  3. The bearings of the fan motor are permanently lubricated and sealed No additional lubrication is needed.

GENERAL ELECTRIC HEATER SIZING ISSUES

When running Heat Wagon electric heaters from a generator, it is extremely important to make sure that the generator selected for your heater is not undersized. The single largest service issue with Heat Wagon electric heaters is improper set up relating to inadequate voltage due to too small of an electric source and/or too small of a power cord.

Generator Selection for Heat Wagon Electric Heaters
The chart below will help you when it comes to selecting the correct generator required for your Heat Wagon heater:

Model| Watts| Phase| BTU’S| Volts| Amps| CFM| Recommendations
---|---|---|---|---|---|---|---
P1500| 1,500| 1 Phase| 5,100| 120| 15| 120| 3KW
P600| 6,000| 1 Phase| 20,500| 240| 25| 250| 10KW
P900| 9,000| 1 Phase| 30,700| 240| 38| 350| 15KW
P1800-1| 18,000| 1 Phase| 64,000/41,000| 240| 75| 590| 25KW
P1800-3| 18,000| 3 Phase| 64,000/41,000| 240| 50| 590| 25KW
P1800D| 18,000| 3 Phase| 64,000/41,000| 240| 50| 950| 25KW
P4000| 40,000| 3 Phase| 136,000/109,200/54,600| 480| 50| 1,800| 50KW
P6000| 60,000| 3 Phase| 204,700/163,800/81,900| 480| 70| 1,800| 75KW

So, by reviewing the above chart, a P1800-1 would require a minimum 18,000 Watt (18KW), 240 volt single phase generator that can provide 75 amps of continuous power.
Heating Coil Ohm Readings

  • P600 – 20
  • P900 – 20
  • P1800’s – 26
  • P4000 – 85
  • P6000 – 54

ELECTRICAL CORD SELECTION FOR HEAT WAGON ELECTRIC HEATERS

  • Once you have established that you have enough power to properly run a Heat Wagon Electric Heater, you still need to deliver the power to the heater adequately. You will need to do a Voltage Drop Formula. The Voltage Drop Formula is amps (source), times resistance (cord’s wire size) equals voltage drop. A cords wire size resistance chart is below:
    • Wire Size Resistance Chart
    • 4 0.000308 Resistance per Foot

    • 6 0.000403 Resistance per Foot

    • 8 0.000641 Resistance per Foot

    • 10 0.00102 Resistance per Foot

    • 12 0.00162 Resistance per Foot

    • 14 0.00258 Resistance per Foot

    • 16 0.00409 Resistance per Foot

    • 18 0.00651 Resistance per Foot

  • A sample formula is listed below:
    • Example: P1800-1 phase 75 amp
    • Minimum Voltage Required=208V
    • 150 ft. x 12 gauge wire (0.00162) = .24
    • 75 amps x .24 = 18.0 volt drop
    • 220v (at source) – 18v = 202 volts
    • Conclusion: Heater will not run, wire too small or cord too long.

Options to Correct the Situation:

  1. Increase gauge of wire: If you increased your wire 6 gauge wire, then your formula would be as follows:
    Example: P1800-1 phase 75 amp

    • Minimum Voltage Required=208V
    • 150 ft. x 6 gauge wire (0.000403) = 0.0605
    • 75 amps x 0.0605 = 4.53 volt drop
    • 220 volts (at source) –4.53 volts= 215.46 volts
    • Now, your heater will run properly.
  2. Run a shorter cord. If by chance you could use a 50ft cord instead of a 150ft cord, then your formula would be as follows:
    Example: P1800-1 phase 75 amp

    • Minimum Voltage Required=208V
    • 50ft. x 12 gauge wire (0.00162) = .08
    • 75 amps x .08= 6 volt drop
    • 220 volts (at source) –6 volts= 214 volts
    • Now, your heater will run properly

P600 PARTS BREAKDOWN

eat-wagon-P1800-Electric-Construction-Heaters-FIG-6

Key #| Description Part#| Key #| Description| Part#
---|---|---|---|---
1| Bottom Plate                                        HWP 4027013| 16| Bracket for Inner Mantle| HWP 4027015
2| Rear Panel                                           HWP 4027011| 17| Terminal Block| HWP 36704
3| Front Panel                                          HWP 4027012| 18| Bracket for Terminal Block| HWP 4027016
4| Inner Mantle                                         HWP 4027014| 19| Strain Reliever| HWP 36922
–| Air Guide Ring, Inner Mantle                 HWP 4027020| 20| Locking Nut, Strain Reliever| HWP 36923
 | (not shown)| 21| Power Cord| ACC 30A10
5| Outer Mantle                                        HWP 4027010| 22| Plug, Handle (2 pcs)| HWP 80110
6| Room Thermostat (Knob Not Included)  HWP 20220| 23| Contactor| HWP 22670
 | (Ambient)| 24| Overheat Limit Switch| HWP 21201
7| Fan Motor                                                              HWP 14145| 25| Limiter, Air Outlet| HWP 21206
8| Hub, Fan Motor HWP 17907| 26| Plug Only| HWP 00275-00T
9| Fan Blade                                                              HWP 16109| 28| Knob, Room Thermostat| HWP 20577
10| Handle                                                              HWP 80100| 29| Bracket for Limiter| HWP 4027017
11| Heating Element (2) HWP 42800| 30| Ground Lug| Not Included
12| Wire Bushing (Guard Ring) HWP 36809|  |  |
13| Toggle Switch                                 HWP 26900 (400021)|  |  |
15| Plastic Bracket for Bulb (2) HWP 37910|  |  |

P600 WIRING DIAGRAM

eat-wagon-P1800-Electric-Construction-Heaters-FIG-8

Key # Description Part#
C Contactor HWP 22670
M Fan Motor HWP 14145
R1-R2 Heating Element HWP 42800
S1 Toggle Switch HWP 26900 (40021)
S2 Room Thermostat HWP 20220
S3 Overheat Limit Switch HWP 21201
S4 Limiter, Air Outlet HWP 21206
X1 Terminal Block HWP 36704
X2 Grounding Lug Not Included
X3 Power Cord & Plug ACC 30A10
  Assembly

P900 PARTS BREAKDOWN

eat-wagon-P1800-Electric-Construction-Heaters-FIG-10

Key #| Description| Part#| Key #| Description| Part#
---|---|---|---|---|---
1| Bottom Plate| HWP 40081001| 15| Fan Blade| HWP 16110
2| Rear Panel| HWP 40081002| 16| Handle| HWP 80100
3| Front Panel| HWP 40081003| 17| Heating Element| HWP 42800 (Qty. 3)
4| Inner Mantle| HWP 40081004| 18| Plug for Handle (2PK)| HWP 80110
5| Outer Mantle| HWP 40081005| 19| Plug| HWP 00275-00T
6| Bracket, Inner Mantle| HWP 40081006| 20| Strain Reliever| HWP 36922
7| Bracket, Terminal Block| HWP 40081007| 21| Toggle Switch|
8| Overheat Limit Switch Qty. 1| HWP 21200 (180024)|  | For S/N A0001-A120| HWP 400021
 | Overheat Limit Switch Qty. 2 for|  |  | For S/N B0121-B0270| HWP 26901
 | Serial #2132 & beyond| HWP 21200 (180024)|  | For S/N B0270-Greater| HWP 26902
9| Plastic Bracket for Thermostat| HWP 37910| 22| Contactor| HWP 22670
11| Ambient Thermostat (Knob Not| Included) HWP 20220| 23| Power Cord Assembly| ACC 50A10
12| Knob for Thermostat| HWP 20577| 24| Guard Ring / Wire Bushnig| HWP 36809
13| Fan Motor| HWP 180014 (14201)| 25| Terminal Block| HWP 36704
14| Fan Hub, Plastic| HWP 17907| 26| Jam Nut| HWP 36923

P900 WIRING DIAGRAM

eat-wagon-P1800-Electric-Construction-Heaters-FIG-12

Key # Description Part#
C Contactor HWP 22670
M Fan Motor HWP 14201 (180014)
R1-R3 Heating Element HWP 42800
S1 Toggle Switch See Key #21 on page 11
S2 Ambient Thermostat HWP 20220
S3 Overheat Limit Switch Qty. 1 HWP 21200 (180024)
  Overheat Limit Switch Qty. 2 for
  Serial #2132 & beyond HWP 21200 (180024)
X1 Terminal Block HWP 36704
X2 Grounding Lug Not Included
X3 Power Cord & Plug ACC 50A10
  Assembly

P1800-1, P1800-3, P1800D PARTS BREAKDOWN

eat-wagon-P1800-Electric-Construction-Heaters-FIG-14
eat-wagon-P1800-Electric-Construction-Heaters-FIG-15

WIRING DIAGRAM HEAT WAGON P1800 SINGLE PHASE

eat-wagon-P1800-Electric-Construction-Heaters-FIG-16
eat-wagon-P1800-Electric-Construction-Heaters-FIG-25

WIRING DIAGRAM HEAT WAGON P1800 THREE PHASE

eat-wagon-P1800-Electric-Construction-Heaters-FIG-17
eat-wagon-P1800-Electric-Construction-Heaters-FIG-26

P4000 – P6000 PARTS BREAKDOWN

eat-wagon-P1800-Electric-Construction-Heaters-FIG-18

Key # Part# Description
1 HWP 400003 Heat Exchanger Chamber
4 HWP 400002 Hood (Including Connection Hatch)
5 HWP 400027 Connection Hatch Only
6 HWP 400001 Handle
7 HWP 400006 Front Panel
8 HWP 400008 Duct Adapter
9 HWP 400007 Bottom Frame
10 HWP 400011 Support Leg
11 HWP 400005 Wheel Shaft
12 HWP 4000012 Plate, Fan Thermostat
13 HWP 180024 Overheat Limit Switch (Inner)
14 HWP 180025 Cooldown Thermostat
15 HWP 20550 Overheat Limit Switch, Air Outlet (PETE)
16 HWP 82770 Metal Bracket, or Bulb
17 HWP 400004 Wheel
18 HWP 74600 Locking Washer
19 HWP 40019 Gasket, Rubber
20 HWP 400026 Heating Element (15 Per Heater, P4000)
  HWP 600026 Heating Element (15 Per Heater, P6000)
21 HWP 36809 Guard Ring, Rubber
24 HWP 400015 Rear Panel
25 HWP 400009 Partition Panel / Bracket
26 HWP 400010 Contactor Mounting Plate
28 HWP 40028 Mounting Plate, Fan Motor
29 HWP 400019 Fan Guard Grill
30 HWP 400020 Bushing, Medium
31 HWP 400016 Bushing, large
32 HWP 22669 Contactor (3 Per Heater)*
33 HWP 400022 Contactor (1 Per Heater)
34 HWP 180016 Strain Reliever (Qty 2)
  HWP 36904 Strain Reliever (P6000 only)
35 HWP 400021 Toggle Switch

*F
36| HWP 38110| Fuse Holder
---|---|---
36A| HWP PEF1| Fuse
37| HWP 36615| Terminal Block (3 per heater)
38| HWP 28400| Transformer
39| HWP 36616| Locking Clamp + End Plate
40| HWP 37910| Plastic Bracket
41| HWP 180017| Ambient Thermostat
41

__

__

42

| HWP 20220

__

__

HWP 400018

| Ambient Thermostat (Knob Not Included) For P4000, S/N 2022 & Beyond

For P6000, S/N 0531 & Beyond

Thermostat Knob (for 180017)

---|---|---
42| HWP 20577| Thermostat Knob (for 20220)
43| HWP 400043| Ground Bolt
45| HWP 400014| Fan Motor
47| HWP 400012| Fan Blade
48| HWP 36802| Bushing, Small
Not Shown| __

ACC WD1425

| __

Duct for P4000, P6000 (14”x25’ long)

 | SFP S1500-105

HWP 32116

| Bracket for Terminal Block

Heating coil wire (sold by the foot)

P4000 – P6000 CONTROL BOX

eat-wagon-P1800-Electric-Construction-Heaters-FIG-20

Item| Part No.| Description| Item| Part No.| Description
---|---|---|---|---|---
1| See Part #41, P.16| AMBIENT THERMOSTAT| 7| HWP PEF1| FUSE
2| HWP 22669| CONTACTOR, 3-POLE*| 8| HWP 400026| HEATING ELEMENT – P4000
2A| HWP 400023-24| CONTACTOR, 3-POLE, 2A + AUX| 8| HWP 600026| HEATING ELEMENT – P6000
3| HWP 400021| SWITCH| 9| HWP 180024| OVERHEAT LIMIT SWITCH (INNER)
4| HWP 20550| OUTLET AIR THERMOSTAT (PETE)| 10| HWP 180025| UNIT COOLDOWN T-STAT
5| HWP 36615| TERMINAL BLOCK| 11| HWP 400014| FAN MOTOR
6| HWP 28400| TRANSFORMER (PETR)|  |  |

P4000 – P6000 WIRING

480 Volt 60 Hz 3 PH

eat-wagon-P1800-Electric-Construction-Heaters-FIG-22

Key # Part# Description
1 HWP 28400 Transformer
2 HWP PEF1 Fuse
3 HWP 400014 Fan Motor
4 HWP 180024 Overheat Limit Switch
5 HWP 180017 Ambient Thermostat
6 HWP 20550 (PETE) Limit Switch – Outer
7 HWP 180025 Unit Cooldown Switch
8 HWP 400021 Control Switch (for output 16KW)
9 HWP 400021 Control Switch (for output + 16KW)
10 HWP 400021 Control Switch (for output + 8KW)
11 HWP 400022 Contactor & Coil (for output 16KW)
12 HWP 22669 Contactor & Coil (for output + 16KW)
13 HWP 22669 Contactor & Coil (for output + 8KW)
14 HWP 22669 Fan Contractor
15 HWP 400022 Pole 4 of Contactor C1
16 HWP 400026 Heating Elements, 2.7KW each for P4000
16 HWP 600026 Heating Elements, 4.0KW each for P6000

P4000 – P6000 WIRING

eat-wagon-P1800-Electric-Construction-Heaters-FIG-24

ELECTRIC HEATER TROUBLESHOOTING

Before beginning the Troubleshooting section, please review the Set-up and Installation section of this manual. Most technical issues can be resolved with proper set-up and preventative mainte-nance.

Symptom Cause Check Remedy
Turn thermostat up and motor does not come on: No power on any phase. Check

for 240V between L1 and L2 (for single phase models). Check for power between L1 and L2, L2 and L3, and between L1 and L3 (for 3 phase models).

Overheat Limit (TO)

| Refer to Setup and Operation section.
 | Overheat Limit (TO)| Check for continuity. The switch should be closed.| Replace
 | Main Switch assembly| Check for continuity.| Replace
 | Motor| Check for proper voltage to motor.| Replace
 | Motor Relay

(P4000 and P6000 Only)

| Check for 24 volts to contactor.| Make sure contactor pulls in. If not, replace.
 | Control Transformer (P4000 and P6000 only)| Check for 24 volts out from Control Transformer.| Replace
Motor Starts but air comes out the inlet:| Reversed power (hot) wires| Check power at terminal block| Switch first two power wires at terminal block
Motor starts but no heat:| Ambient Thermostat| Turn thermostat above ambient temperature.| Replace
 | Overheat limit(s)| Check for continuity. It is a closed switch| Replace
 | Contactors| Make sure they are clean, tight, and that they pull in when voltage is applied| Replace
 | Circuit Breakers (P1800-1 only)| Check that none are tripped and power flows thru.| Replace
 | Heating Elements|

Visual check for burns. Check resistance of each individual element

| P600 & P900 20 K Ohms, P1800

Series 26 K Ohms, P4000 85 K Ohms, P6000 54 K Ohms

Heater operates, fan doesn’t cool| Fan Cooldown Thermostat| Check for resistance.| Replace
the unit after thermostat is satisfied.|  | Check for proper wiring.| Rewire
High limit tripping| Low Volume of Air| Duct restrictions.

Dust buildup on inlet grill

| Straighten duct. Clean fan area.

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