DeWalt DXH50KTHC, DXH135KTHC, DXH75KTHC, DXH175KTHC, DXH210KTHC Instruction Manual

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855-805-5745 • www.dewalt.com

INSTRUCTION MANUAL
GUIDE DE’UTILISATION
MANUAL DE INSTRUCCIONES

SAVE THESE INSTRUCTIONS

CONSERVEZ CES INSTRUCTIONS

GUARDE ESTAS INSTRUCCIONES

DXH50KTHC, DXH75KTHC, DXH135KTHC, DXH175KTHC, DXH210KTHC

Kerosene Forced-aid Heater
Appareil de chauffage à air pulsé au Kérosène

Calentador Caldeo a aire forzado a Kerosene

READ INSTRUCTIONS CAREFULLY: Read
and follow all instructions. Place instructions
in a safe place for future reference. Do
not allow anyone who has not read these
instructions to assemble, adjust or operate
the heater.

VEUILLEZ LIRE ATTENTIVEMENT LES INSTRUCTIONS :
Lisez et observez toutes les instructions. Conservez
ces instructions dans un endroit sécuritaire pour vous
y référer ultérieurement. Interdisez à quiconque n’ayant
pas lu les présentes directives d’assembler, de régler
ou de faire fonctionner cette fournaise.

LEA CUIDADOSAMENTE LAS INSTRUCCIONES:

Lea y siga todas las instrucciones. Conserve
estas instrucciones en un lugar seguro para futura
referencia. No permita que nadie que no haya
leído estas instrucciones arme, ajuste o use el
calentador.

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WARNING: NOT FOR HOME OR RECREATIONAL VEHICLE USE.

Denitions: Safety Guidelines

The definitions below describe the level of severity for each signal word. Please read the manual and pay attention to these symbols.

DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

NOTICE: Indicates a practice not related to personal injury which, if not avoided, may result in property damage.

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 INSTRUCTIONS MANUAL, LABELS, ETC. CONTACT 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.

WARNING: CARBON MONOXIDE CAN KILL YOU

USING A PORTABLE HEATER IN AN ENCLOSED AREA CAN PRODUCE
DEADLY CARBON MONOXIDE.

WARNING: This product can expose you to chemicals including lead

and lead compounds, which are known to the State of California to cause
cancer and birth defects or other reproductive harm. For more information
visit www.P65Warnings.ca.gov

This is an unvented gas-fired portable heater. It uses air (oxygen) from the
area in which it is used. Adequate combustion and ventilation air must be
provided. Refer to page 4.

WARNINGS

WARNING:

• DO NOT USE GASOLINE, NAPHTHA OR VOLATILE FUELS.

• STOP HEATER BEFORE ADDING FUELS.

• ALWAYS FILL OUTDOORS AWAY FROM OPEN FLAME.

• DO NOT USE EXTERNAL FUEL SOURCE.

• DO NOT OPERATE HEATER WHERE FLAMMABLE LIQUIDS OR VAPORS

MAY BE PRESENT.

• DO NOT START HEATER WHEN CHAMBER IS HOT.

• DO NOT START HEATER WHEN EXCESS FUEL HAS ACCUMULATED IN

THE CHAMBER.

• DO NOT PLACE COOKING UTENSILS ON TOP OF THE HEATER.

• PLUG ELECTRICAL CORD INTO A PROPERLY GROUNDED THREE-

PRONG RECEPTACLE.

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CONTENTS

WARNINGS 2

HEATER SPECIFICATIONS 3
OPERATING & SAFETY PRECAUTIONS 4
LIGHTING/OPERATING INSTRUCTIONS 5
MAINTENANCE 5
EXPLODED VIEW AND PARTS LIST 8
WIRING DIAGRAM 11

Model DXH50KTHC DXH75KTHC DXH135KTHC DXH175KTHC DXH210KTHC

Burn Rate: 50,000 BTU/hr (14.7 kW) 75,000 BTU/hr (22 kW) 125,000 BTU/hr (37 kW) 175,000 BTU/hr (51 kW) 210,000 BTU/hr (61.5 kW)

Fuel Rate: 0.37 gal/hr (1.5 L/hr) 0.55 gal/hr (2.1 L/hr) 0.96 gal/hr (3.5 L/hr) 1.3 gal/hr (5.0 L/hr) 1.6 gal/hr (6.0 L/hr)

Electrical Input

115 V, 60 HZ, 1 Ø, 3.5 A 1115 V, 60 HZ, 1 Ø, 4 A 115 V, 60 HZ, 1 Ø, 5.5 A 115 V, 60 HZ, 1 Ø, 5.5 A 115 V, 60 HZ, 1 Ø, 5.5 A

Min. operating voltage

110 V 110 V 110 V 110 V 110 V

Pressure Setting 3.5 psig (24 kPa) 4.2 psig (24 kPa) 5.1 psig (38 kPa) 6.8 psig (40 kPa) 8.2 psig (58.6 kPa)

Max. Outlet Temp. 1450 °F (787 °C) 1450 °F (787 °C) 1450 °F (787 °C) 1450 °F (787 °C) 1450 °F (787 °C)

Fuel Tank Capacity 4 gallons (15.1 L) 6 gallons (22.7 L) 8.45 gallons (32 L) 13.5 gallons (51 L) 13.5 gallons (51 L)

Ignition Direct Spark, Continuous Direct Spark, Continuous Direct Spark, Continuous Direct Spark, Continuous Direct Spark, Continuous

Spark Generator Igniter 13 kV, 10 ma Igniter 13 kV, 10 ma Igniter 13 kV, 10 ma Igniter 13 kV, 10 ma Igniter 13 kV, 10 ma

Primary Safety Control Solid State Control Solid State Control Solid State Control Solid State Control Solid State Control

Certification

Heater Specications

WARNING: If the information in this manual is not followed
exactly, a fire or explosion may result causing injury or loss of
life.

- Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.

- Service must be performed by a qualified service agency.

DXH50KTHC & DXH75KTHC WARNING

Not suitable for use on wood floors or other combustible materials. When
used the heater should rest on a suitable insulating material at least 1 inch
thick and extending 3 feet or more beyond the heater in all directions.

CAUTION: CSA certied for use with only No. 1-K kerosene fuel.
Factory Tested: Kerosene, Diesel #1 and #2, Fuel Oil #1 and #2, JP8 (Jet A Fuel)

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Operating Precautions

This is a kerosene, direct-fired, forced air heater. It’s intended use is primarily
temporary heating of buildings under construction, alteration or repair.

Direct-Fired means that all of the combustion products enter the heated space. Even
though this heater operates very close to 100 percent combustion efficiency, it still
produces small amounts of carbon monoxide. Carbon monoxide (called CO) is toxic.
CO can build up in a heated space and failure to provide adequate ventilation could
result in death. The symptoms of inadequate ventilation are:

• headache

• dizziness

• burning eyes and nose

• nausea

• dry mouth or sore throat

Be sure to follow advice about ventilation in the Safety Precautions section.
Forced Air means that a blower or fan pushes the air through the heater. Proper

combustion depends upon this air flow; therefore, the heater must not be revised,
modified or operated with parts removed or missing. Likewise, safety systems must
not be circumvented or modified in order to operate the heater.

When the heater is to be operated in the presence of other people the user is
responsible for properly acquainting those present with the safety precautions and
instructions, and of the hazards involved.

Safety Precautions

THIS IS A HEATING APPLIANCE. DO NOT ATTEMPT TO WARM OR COOK
FOOD ON THIS HEATER.

1. Recommended for use with No.1-K kerosene fuel. Factory tested for use with No.2-K
kerosene, No.1 or No.2 Diesel, No.1 or No.2 fuel oil or JP8 Jet A fuel and these fuels may
be used as well. Never use gasoline, biodiesel, oil drained from crank cases, naphtha, paint
thinners, alcohol or any other highly flammable fuels.

2. Check the heater thoroughly for damage. DO NOT operate a damaged heater.

3. DO NOT modify the heater or operate a heater which has been modified from its
original condition.

4. Suitable for either outdoor or indoor use where adequate ventilation is provided. Never
use in areas normally for habitation. Not for use where exposed to weather.

5. Use in well ventilated areas, provide at least 2 sq. ft. (0.19 sq. m.) of opening near
the floor and 2 sq. ft. (0.19 sq. m.) near the ceiling directly to outdoors. Increase air
openings as marked for each additional heater.

6. Always keep combustibles, like paper and wood at least 8 ft. (2.4 m) from the
heater outlet and 3 ft. (1.0 m) from the top, sides and inlet. Locate 10 ft. (3.0 m)
from canvas or plastic coverings and secure them to prevent flapping movement.

7. Caution: Due to the high surface and exhaust temperatures, adults and children
must observe clearances to avoid burns or clothing ignition. Do Not Touch. Keep
children, clothing, and combustible away.

8. Install the heater such that it is not directly exposed to water spray, rain and / or
water.

9. Never use in areas normally for habitation and /or where children may be present.

10. Operate only on a stable, level surface.

(DXH50KTHC & DXH75KTHC – See wood floor warning on page 3).

11. Do not use with duct work. Do not restrict inlet or exit.

12. Use only with electrical power specified. The electrical connection and grounding

must comply with National Electrical Code – ANSI/NFPA 70 (USA) and CSA
C22.1 Canadian Electrical Code, Part 1 (Canada).

13. Use only a properly grounded 3-prong receptacle or extension cord.

14. Do not move, handle, or service while hot or in operation.

15. Use only in accordance with local, state (provincial) or national requirements,

ordinances and codes.

Operating Instructions

UNPACKING

1. Remove heater from carton.

2. Remove all protective material which may have been applied to the heater for shipment.

3. Check the heater for possible shipping damage. If any damage is found immediately
contact the manufacturer at 855-805-5745.

ASSEMBLY

(FOR 135,000, 175, AND 210 BTU/hr models only see page 10)

Wheels and handles are found in the shipping carton along with mounting hardware. The
wheels, axle and mounting hardware are in a package. Tools required are a 5/16” nut driver,
3/8” open or adjustable wrench and standard pliers.

1. Assemble the wheels onto the wheel support as shown.

2. Install one of the cotter pins into the hole on one end of axle.

3. Slide the large washer, then wheel onto the axle next to the cotter pin.

4. Slide the spacer onto the axle next to the wheel.

5. Slide the partially assembled axle through the wheel support frame.

6. Slide the spacer onto the axle next to the wheel support.

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7. Slide the wheel, then large washer onto the axle and hold in place with the remaining
cotter pin.

8. Install the caps over the larger washers to finish the wheel assembly.

PREPARATION FOR OPERATION

1. Check the heater for possible shipping damage. If any is found, immediately contact
the manufacturer at 855-805-5745.

2. Follow all of the “Precautions”.

3. Fill the fuel tank with clean kerosene. In extremely cold weather, condensation may
develop in the tank and it is recommended that a tablespoon of de-icer be added
for each gallon (4 liters) of fuel in the tank. When filling the heater, use at least 2
gallons (8 liters) of fuel. Be sure heater is level and do not overfill. Use a funnel or
can with a long fill spout.

IMPORTANT: Before lling fuel tank the rst time or after extended storage
periods, drain the fuel tank of any moisture or condensation.

4. Locate heater at a safe distance from combustible materials. Models DXH50K &
DXH75K are not suitable for use on wood floors or other combustible materials.
When used, the heater should rest on suitable insulating material at least 1 inch
thick and extending 3 ft. or more beyond the heater in all directions.

HEATER START UP

DXH50KTHC

1. Plug the heater into a grounded 115V, 60 Hz, 1 Ø outlet.

DXH75KTHC, DXH135KTHC, DXH175KTHC, DXH210KTHC

1. Turn thermostat to lowest setting and make sure “On/Off” switch is “Off”.

2. Plug the heater into a grounded 115V, 60 Hz, 1 Ø outlet.

3. Start heater by pushing toggle switch to “On” position (light signifies switch is in

“On” position.)

4. Adjust thermostat to desired setting. Heater will cycle on/off as heat is required.

NOTES FOR ALL MODELS:

• In cold weather (below 10 °F [-12.2 °C] ) starting may be improved by hold­ing a nger over the vent hole of the pump adjustment screw cap until the
heater starts.

• This unit is equipped with an interrupt circuit. The reset is integrated into
the “On/Off” switch. If the unit does not start, toggle the switch to “Off”,
wait 5 min, and toggle the switch to “On”

• EXTENSION CORD REQUIREMENTS: Up to 100’ (30.5 M) use 16 awg con­ductor. 101’ - 200’ (30.5 - 61.0 m) use 14 awg conductor.

HEATER SHUT DOWN

DXH50KTHC

1. Unplug the heater from power source.

DXH75KTHC, DXH135KTHC, DXH175KTHC, DXH210KTHC

1. Push “On/Off” switch to “Off” position. For extended shutdown, unplug heater
from power source.

HEATER RESTART AFTER SAFETY SHUTDOWN

DXH50KTHC

1. Unplug the heater from power source.

2. Wait 5 minutes.

3. Plug the heater back into power source.

DXH75KTHC, DXH135KTHC, DXH175KTHC, DXH210KTHC

1. Toggle switch to “OFF” position

2. Wait 5 minutes

3. Restart

Maintenance and Storage

WARNING: To prevent personal injury, unplug the heater from the wall outlet
before servicing.

For maximum efficiency and trouble-free service, make the following periodic
maintenance, cleaning and inspections.

ADJUSTING PUMP PRESSURE

Due to varying fuel viscosities and normal component wear the pump pressure on
this heater may need to be adjusted.

FUEL PRESSURE ADJUSTMENT SCREW

(located at the rear of the heater)

PRESSURE GAGE

(not included on DXH50KTHC

or DXH75KTHC)

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ADJUSTMENT PROCEDURE

1. Fill fuel tank.

2. Start heater.

3. Locate the pressure adjustment screw, located on the back of the power pack assembly
and accessible by the handle of the heater.

4. Remove the rubber cap over the fuel pressure adjustment screw.

5. Using a flat bladed screw driver, turn the pump pressure adjustment screw:

• clockwise

to increase pump pressure

• counter-clockwise

to decrease pump pressure
By using the installed pressure gage (not included on DXH50KTHC) you may quantitatively
calibrate the pressure. The manufacturer’s recommended pump pressures are in the
specifications chart on page 3.

6. The desired qualitative burner characteristics are that the nose cone in the combustion
chamber should be cherry red with no dark spots and the flame should not extend
beyond the nose cone.

IMPROPER PRESSURE ADJUSTMENT

Problem: Heater does not have a strong consistent flame.

Heater smokes and spits raw fuel.
Nose cone does not get cherry red.

Adjustment: Pump pressure is too low.

Turn adjustment screw clockwise to increase pump pressure

Problem: Flame extends beyond the end of the heater.
Adjustment: Pump pressure is too high.

Turn adjustment screw counter clockwise to decrease pump pressure.

Daily Maintenance Schedule

1. GENERAL. Make general visual inspection of heater for loose or damaged parts.
Check nuts and bolts to insure against looseness caused by vibration or rough
handling. Damaged parts should be repaired or replaced before using heater
again. Check heater operation to be sure it is operating normally (See “Servicing”
section for description of normal operation).

2. FILTERS. Dirty air or fuel filters will cause an imbalance in the air-fuel mixture. The
best indication that this condition exists is an increase in odors or difficulty getting
your heater to ignite. This heater should never be operated without the filters
in place. If required, clean filters as described under “500 Hours” and “Annual
Schedules”.

500 Hour Maintenance Schedule

1. AIR INTAKE FILTER. Remove and wash the filter element with a mild detergent,
dry thoroughly and replace. Do not oil the filter element. If your heater is
used where there is considerable dust or dirt, clean as often as necessary
(approximately every 50 hrs.).

2. REMOVE DUST. Clean heater twice a season (more often under dusty conditions).
Remove accumulated dust from the transformer, burner, motor and fan blades
with compressed air. Wipe area clean with a clean dry cloth. Inspect area to insure
all foreign materials are removed, especially around the burner and combustion
area.

3. CAD CELL. Clean the glass portion of the cad cell with a soft dry cloth.

4. NOZZLE. Accumulation of dirt from fuel and carbon from the compressor vanes
will eventually fill up the passages in the nozzle, resulting in reduction of fuel and
air flow. Pressure will gradually increase giving improper fuel-air mixture and
excess odor and smoke. If this occurs, replace the fuel nozzle.

5. FUEL TANK. Clean twice a season (during frequently used periods, clean twice a
month). Drain and flush the fuel tank with clean fuel oil.

Annual Maintenance Schedule

1. AIR OUTPUT FILTER. Remove the air output filter and tap the contaminated side
gently on a solid object to remove contaminates. Compressed air or liquids should
not be used to clean this filter. Reinstall cleaned filter in filter body in the same
position as it was when removed. If the filter appears extremely dirty, replace it
with a new filter of the same type. When replacing the filter cover, be sure the
gasket is firmly in place and the screws in the filter cover are tight to prevent air
leaks.

2. FUEL FILTER. Remove the fuel filter from fuel line and direct compressed air
through the filter in the opposite direction of fuel flow. Safety glasses should be
worn when using compressed air.

3. AIR AND FUEL LINES. If the air or fuel lines are removed during cleaning, be sure
all connections are tight before operating unit.

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Storage

Store the heater in a dry location free from fumes or dust.
At the end of each heating season, clean the heater as described in the MAINTE­NANCE section. Drain and flush the fuel tank with clean fuel. The manufacturer
recommends completely filling the tank with fuel for extended storage to minimize
condensation inside the tank.
It is recommended to only store kerosene in containers that are marked
“KEROSENE”.

Servicing

A hazardous condition may result if a heater is used that has been modified or is not
functioning properly.

When the heater is working normally:
* The flame is contained within the heater.
* The flame is essentially yellow.
* There is no strong disagreeable odor, eye burning or other physical discomfort.
* There is not smoke or soot internal or external to the heater.
* There are no unplanned or unexplained shutdowns of the heater.

Troubleshooting

High limit switch open circuit

1. Make sure heater is cooled off, toggle switch to “OFF” position, wait 5 minutes and retry.

Sparks, calling for ame, but no or slow motor operation

1. Check wiring to motor (per wiring schematic in manual)

2. Make sure that the pressure gauge is in place and not damaged

3. Adjust pressure for proper heater operation per manual

4. With heater disconnected from AC source, rotate fan clockwise to verify motor is free

5. Remove air filter housing from motor and inspect the pump rotor for damage. If damaged,
replace rotor assembly.

6. If wiring is correct, pump rotor is okay, and motor is not rotating freely, replace motor or
power-pack assembly.

7. If problem persists, replace oil flame control assembly.

8. Check for spark arching from the electrode assembly, to the combustion cylinder.

9. Check the cad cell for continuity.

No Spark

1. Check length and gage of extension cord for proper amp. draw (check page 5)

2. Check wiring to igniter (per wiring schematic in manual)

3. Check gap between electrode probes (2.3 - 3mm)

4. Still no spark, replace igniter assembly

5. Replace oil flame control assembly

Abnormal Motor Operation - Motor overheats or Stops

1. Motor speed too low (Motor should operate at 3450 rpm) - Replace motor

2. With heater disconnected from AC source, rotate fan clockwise to verify motor is free

3. Remove air filter housing from motor and inspect the pump rotor for damage. If damaged,
replace rotor assembly

4. If wiring is correct, pump rotor is okay, and motor is not rotating freely, replace motor or
power-pack assembly

5. Replace oil flame control assembly

Unable to Detect Flame

1. Check wiring to cad cell (per wiring schematic in manual)

2. Clean cad cell photo cell
a) Slide cad cell out of cad cell holder
b) Push the photo cell out of the black rubber cad cell housing by pushing on the 2 purple

wires
c) Clean the photo cell with a soft cloth and rubbing alcohol
d) Pull the photo cell back into the cad cell housing and reinstall into holder
e) Test heater

3. If the heater still does not operate, replace cad cell

4. Replace oil flame control assembly

Flame Control Failure

1. Check wiring in heater (per wiring schematic in manual).

2. Replace oil flame control assembly.

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Filter Kit

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# 50K 75K 135K 175K 210K Description

1 21036 21036 21036 21036 21036 Power Cord
2 26958 26970 26974 27112 27112 Fuel Tank Assembly
3 **** 21883 21884 21885 21886 RadiationShield Ass’y
4 26960 26967 26975 26975 26975 Power Pac Ass’y
5 21686 24343 24346 24346 24346 Fuel Tube
6 21835 21836 21837 21837 21837 Grille Assembly
7 24011 24011 24011 24011 24011 Oil cad cell Bracket
8 28779 28779 28792 28793 28793 Fuel Filter

9 23449 23449 23449 23449 23449 Motor Cord Sleeve
10 26957 27144 26973 27111 27111 Bottom Shell
11 21844 27143 26972 27110 27110 Top Shell, Burner
12 21854 26966 26971 27109 27109 Top Shell, Insp. Cover
13 21864 21864 21865 21865 21865 Motor Mounting Brkt
14 **** 28788 28735 28735 28735 Start Capacitor
15 23725 23725 24345 24345 24345 Air Tube
16 26225 26225 26225 26225 26225 Snap Bushing
17 26962 21794 26901 22105 22105 High Limit Control
18 F226831 F226831 F226831 F226831 F226831 Kit, Rotor
19 **** 26898 26898 26898 26898 Receptacle, 110V
20 **** 22104 22104 22104 22104 AC Receptacle Cover
21 26833 26833 26833 26833 26833 Air Pump Cylinder
22 21810 21810 21810 21810 21810 Outlet Housing
23 21812 21812 21812 21812 21812 Inlet Housing
24 **** **** 22257 22257 22257 Burner Head Ass’y
25 F221887 F221887 F221887 F221887 F221887 Kit, Filter
26 21814 21814 21814 21814 21814 Outlet Filter
27 21815 21815 21815 21815 21815 Inlet Filter
28 F266842 F266842 F266842 F266842 F266842 Kit, Pump Adjustment
29 21866 21866 21867 21867 21867 Flame Control Ass’y
30 21816 21816 21816 21816 21816 Flame Control Bracket
31 F226865 F226865 F226865 F226865 F226865 cad cell Flame Sensor

32 21882 21868 21869 21870 21871

Comb.Chamber Cyl.

Ass’y

# 50K 75K 135K 175K 210K Description

33 26959 26959 26959 26959 26959 Fuel Cap
34 26910 26910 26910 26910 26910 Fuel Cap Gasket
35 27339 21817 21818 21818 21818 Motor
36 27790 27790 28739 28739 28739 Nozzle Adapter
37 27421 28740 26885 26866 26866 Fan
38 22142 22142 22142 22142 22142 Igniter Assembly
39

F227416 F221878 F221879 F221889 F221891

Fuel Air Aspir. Nozzle
40 26223 26223 26223 26223 26223 Strain Relief Bushing
41

F221857 F221857 F221857 F221857 F221857

Electrode Assembly

42 21820 21820 21820 21820 21820

Electrode Insulated

Cover
43 21821 21821 21821 21821 21821 Hose Barb Adapter
44 **** 21822 21822 21822 21822 Thermostat Knob
45 **** 21734 21734 21734 21734 Thermostat Assembly
46 28785 28785 28785 28785 28785 ON/OFF Switch
47 **** 28791 28778 22185 22185 Fuel Gauge
48 26964 21888 27107 27116 27116 Control Panel
49 26965 26968 27108 27117 27117 Control Panel Back
50 28786 28786 28786 28786 28786 Pressure Gauge, Round
51 40801 40801 **** **** **** Handle
52 21813 21813 21813 21813 21813 Gasket, Outlet Filter

* 24171 24171 **** **** **** Nozzle mtg. plate
* 26227 26227 26227 Snap Bushing

* 27429 27429 27429 27429 27429

Nozzle Ext. Retaining

Ring
* 28745 28745 **** **** **** Fuel Line Bushing
* **** 22146 22146 22146 22146 Bracket Thermostat Mtg.
* **** 26070 26070 26070 26070 Clamp Loop

REPLACEMENT PARTS LIST

* Not shown in Figure **** Not applicable to model

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* Not shown in drawing

Handle and wheel assembly for
DXH135KTHC, DXH175KTHC & DXH210KTHC only.

Ref. Item # Item # Item # Description

135K 175k 210K

1 40981 40981 40981 Wheel Assembly, 10”
2 27127 27129 27129 Upper Handle w/Spring Clips
* 27121 27121 27121 Lower Handle, Right
3 22173 22173 22173 Lower Handle, Left
* 27105 27105 27105 Leg Support, Right
4 27105 27105 27105 Leg Support, Left
5 27104 27132 27133 Support Leg
6 27128 27130 27131 Front Handle
7 28749 28749 28749 Large Retainer Washer
8 28750 28750 28750 Cotter Pin
9 28751 28751 28751 Hub Cap
10 28754 28754 28754 Extension Cord Caddy
11 21897 21897 21897 Wheel Spacer
12 22168 22184 22184 Axel
* 28787 28787 28787 Hardware Package

PARTS LIST

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WIRING DIAGRAMS

DXH50KTHC
DXH75KTHC

18AWG BLUE

THERMOSTAT

18AWG PURPLE

COM1

I2

I1

M2

M1

L

N

18AWG PURPLE

18AWG GRN

18AWG BLK

18AWG WHT

18AWG YELL

18AWG YELL

FLAME CONTROL SCHEMATIC

(connections may not be in same

position on circuit board)

CORD SET

CAD CELL

HI-LIMIT
SWITCH

1

3

2

18AWG GRN

AC OUTLET

ON/OFF SWITCH

125KT,175KT,

210KT ONLY

75KT,125KT,175KT,210KT ONLY

18AWG PINK

18AWG PINK

MOTOR CAPACITOR

MOTOR

18AWG ORG

18AWG ORG

18AWG RED

18AWG RED

IGNITION TRANSFORMER

17AWG BLK

18AWG GRN

ELECTR0DE

17AWG BLK

18AWG BLK

18AWG WHT

H2

H1

The parts lists and wiring diagram show
the heater as it was constructed. Do not
use a heater which is different from that
shown. Heater performance is effected
by air pressure setting. If there is any
uncertainty about the air pressure setting,
have it checked. A heater which is not
working right must be repaired, but only by
a trained, experienced service person.

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WIRING DIAGRAMS

The parts lists and wiring diagram show the heater as it was constructed. Do not use a heater which is different from that shown. Heater performance is effected by air
pressure setting. If there is any uncertainty about the air pressure setting, have it checked. A heater which is not working right must be repaired, but only by a trained,
experienced service person.

ON/OFF SWITCH

AC OUTLET

18AWG GRN

18AWG ORG

18AWG ORG

2
3

1

IGNITION TRANSFORMER

MOTOR

HI-LIMIT
SWITCH

CORD SET

MOTOR CAPACITOR

CIRCUIT BOARD

18AWG YELL

18AWG YELL

18AWG RED

18AWG RED

18AWG WHT

18AWG BLK

18AWG GRN

18AWG PURPLE

18AWG PINK

18AWG PINK

1

2

3

4

5

6

18AWG PURPLE

THERMOSTAT

18AWG BLUE

7

8

ELECTR0DE

18AWG GRN

17AWG BLK

9

10

RED LED

11 12

18AWG BLUE

17AWG BLK

24AWG BLK

24AWG RED

18AWG BLK

18AWG WHT

CAD CELL

DXH135KTHC
DXH175KTHC
DXH210KTHC