DeWalt DXH70KTFRHC Instruction Manual
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INSTRUCTION MANUAL
GUIDE DE’UTILISATION
MANUAL DE INSTRUCCIONES
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Kerosene Forced-air
Heater DXH70KTFRHC
Radiateur au Kérosène à Ventilation Forcée DXH70KTFRHC
Calefactor de Aire Forzado a Kerosene DXH70KTFRHC
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.
2018 WO
English
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WARNING: NOT FOR HOME OR RECREATIONAL VEHICLE USE.
Denitions: 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 Safety Precautions on 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.
• DO NOT PLACE CLOTHING OR OTHER COMBUSTIBLE ARTICLES ON
TOP OF HEATER
• PLUG ELECTRICAL CORD INTO A PROPERLY GROUNDED THREE-
PRONG RECEPTACLE.
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English
CONTENTS
WARNINGS 2
HEATER SPECIFICATIONS 3
OPERATING & SAFETY PRECAUTIONS 4
OPERATING INSTRUCTIONS 4
MAINTENANCE 5
TROUBLESHOOTING 7
EXPLODED VIEW AND PARTS LIST 8
WIRING DIAGRAM 10
WARRANTY 11
Heater Specications
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.
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 certied 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)
MODEL NO.: ............................................................................. DXH70KTFRHC
BTU/hr: .......................................................................................70,000 BTU/hr
(20.5 kW)
CONSUMPTION RATE: ..................................................................0.52 GAL/hr
(1.97 L/hr)
TANK CAPACITY: ......................................................................2.77 GALLONS
(10.5 L)
RUN TIME: ....................................................................................... 5.34 hours
ELECTRICAL INPUT: .................................................................... 115 V, 60 HZ
ASSEMBLED DIMENSIONS: ...........................................13.25” X 25” X 22.25”
(33.6 cm X 63.5 cm X 56.5 cm)
DRY WEIGHT: ........................................................................40 lbs. (18.14 kg)
FULL WEIGHT: ......................................................................... 44 lbs. (20.0 kg)
APPROXIMATE HEATING AREA: ............................ 1750 SQ. FT (162.5 SQ. m)
THERMOSTAT RANGE: .................................... 41°F to 99°F ( 5 °C to 37.2 °C )
DEFAULT THERMOSTAT SETTING: .............................................68 °F ( 20 °C )
Clearance To Combustibles
From Outlet From Sides From Top From Rear
8 ft (2.44m) 3ft (0.9 m) 3ft (0.9 m) 3ft (0.9 m)
Top
Floor
Rear
Sides
Outlet
3 ft (0.91 m)
3 ft (0.91 m)
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Operating Precautions
This is a kerosene, direct-fired, radiant 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 outdoor use. 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. from the heater
outlet and 3’ from the top, sides and inlet. Locate 8 ft. 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. Always operate only on a stable, level surface.
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 pronged 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
1. First Locate the hardware package. You will find four long screws for the base
tubing, along with 4 nuts and washers. Place the heater on the base tubing as
shown on the front of this manual or in the parts diagram. Use the long screws and
matching fasteners to attach the base to the fuel tank.
2. In the hardware package you will also find two shorter washer headed screws for
attaching the handle to the top of the heater. Using a Phillips headed screw driver,
attach the handle to the top of the heater as shown on the front of this manual or in
the parts diagram.
3. Finally install the lower heat shield. The included heat shield will be located
centered at the 6 o’clock position. Only two screws are used to hold the shield in
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place. The middle hole is only for the locating pin that receives no fastener. Simply
remove the screws that line up with the holes on the heat shield when on the
centering pin. Put the heat shield into place and re-attach the screws.
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 “Operation Precautions” and “Safety 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. 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
1. Locate the power plug near the controls of the heater. Using a properly sized
and grounded extension cord plug in the unit.
2. When power reaches the heater the Red light on the back of the heater will
illuminate.
3. Turn the power switch to the ON position. The LED read out will show the
approximate room temperature. When you turn the thermostat knob clockwise
the LED readout will change to show the set temperature. When that number
is higher than the room temperature the heater will begin is sequence of
operation.
4. Once the heater begins to run it will cycle on and off based on the thermostat
setting. If for any reason your heater does not run properly refer to the
Diagnostic and trouble shooting section in this manual or contact the
manufacturer with one of the methods listed on the back page of this manual.
HEATER SHUT DOWN
To turn off either turn the thermostat knob to a temperature lower than the room
temperature or move the power switch to the off position.
NOTICE: The heater is engineered with an integrated 3 minute cooling cycle
designed to prolong the life of internal components and to reduce surface
temperatures that tend to increase shortly after shutdown. Please allow this cycle to
complete before removing power from the heater.
Maintenance and Storage
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 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 filter in place.
Contact DeWALT for replacement parts
500 Hour Maintenance schedule
1. REMOVE DUST. Clean heater twice a season (more often under dusty conditions).
Remove accumulated dust from the 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.
2. CAD CELL. Clean the glass portion of the cad cell with a soft dry cloth.
3. NOZZLE. Accumulation of dirt and carbon from the combustion process can
eventually fill up the passages in the nozzle, resulting in reduction of fuel and air
flow. If this occurs, replace the fuel nozzle. Contact DeWALT for service parts
4. FUEL TANK. Clean twice a season (during frequently used periods, clean twice a
month). Drain and flush the fuel tank with clean fuel oil.
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ANNUAL MAINTENANCE SCHEDULE
1. 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.
2. FUEL LINES. If the fuel lines are removed during cleaning, be sure all connections
are tight before operating unit. If any dry rotting or cracking in the lines is observed
replace with 1/4” id fuel line or contact DeWALT for service parts.
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 properly:
* The flame is contained within the heater.
* The flame is essentially blue with perhaps some yellow tipping.
* There is no strong disagreeable odor, eye burning or other physical discomfort.
* There is no smoke or soot internal or external to the heater.
* There are no unplanned or unexplained shut downs of the heater.
The parts lists and exploded view show the heater as it was constructed. Do not
use a heater which is different from that shown. In this regard, use only the hose,
regulator and cylinder connection fitting (called a POL fitting) supplied with the heater.
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Diagnostic Safety Shutdown and Trouble Shooting
MOTOR DOES NOT START AND NO IGNITION
No electrical current
Check power supply (is it plugged in?)
Check proper position of the switch (is it on?)
Check fuse/breaker
Wrong setting on
thermostat
Check for setting of thermostat higher than room temp.
Defective motor Replace Motor
MOTOR STARTS NO IGNITION OR CUTS OUT
Not enough fuel at
the burner
Ensure an adequate level of fuel is in the tank.
Cycle unit a few time to allow fuel to fill the filter and fuel
system.
Check fuel lines including filter for leaks.
Clean or replace nozzle.
Electronic igniter
defective
Check igniter connections including transformer
Check electrodes for corrosion and carbon build up.
Replace transformer
Flame control box
defective
Replace flame control box
Photocell defective Clean or replace photo cell
Solenoid defective
Check connections
Replace solenoid
MOTOR STARTS, HEAT EMITS SMOKE
Not enough combustion air
Make sure Air inlet and outlet are free
Clean burner disc
Fuel contaminated
or contains water
Drain fuel in tank and replace with clean fuel
Clean or replace fuel filter
Air leaks in fuel
circuit
Check fuel lines and system for possible leaks
Not enough fuel at
burner
Clean or replace fuel nozzle
Too much fuel at
burner
Replace nozzle
HEATER DOES NOT STOP
Solenoid defective Replace solenoid
LED DIAGNOSTIC READ OUT TABLE
ERROR
CODE
DESCRIPTION
E1 Ignition failed or flame out
E2 Temperature sensor malfunction
E3 High limit switch over heat
E4 Flame control malfunction
E5 Solenoid monitor malfunction
E6 Photo cell fault
E7 Motor Speed fault
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1
2
27
28
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
19
20
21
22
23
24
25
26
29
30
55
56
31
32
33
34
35
39
42
43
44
45
46
47
48
49
50
51
52
53
54
57
58
59
60
61
62
63
36
37
38
40
41
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# P/N DESC. QTY
1 22300 Oil drain Plug 1
2 NA Drain plug O-ring 1
3 22302 Tank support foot 1
4 22303 Fuel tank 1
5 22304 Fill spout filter holder 1
6 22305 Fill spout Filter 1
7 22306 Fuel cap 1
8 NA Spring clamp 1
9 NA Fuel return line o-ring 1
10 22308 Fuel return stem 1
11 22309 Fuel pickup with filter 1
12 22311 Fuel filter 1
13 22312 Fuel level float and gauge 1
14 NA Side plate 2
15 NA Motor support 1
16 22315 External shell 1
17 22316 Air flow blower motor 1
18 NA Flue support bracket 4
19 NA Motor mounting support
bracket
2
20 22319 Air flow fan blade 1
21 NA Flue ring 1
22 NA Air Collection ring 1
# P/N DESC. QTY
23 NA Seal plate 1
24 22323 Nozzle 1
25 22324 Swirl plate 1
26 NA Burner head 1
27 22326 Igniter 1
28 22327 Control board 1
29 NA Control board mounting
bracket
1
30 NA Control systems mounting
bracket
1
31 22330 High limit switch 1
32 NA Photocell bracket 1
33 22332 Photocell 1
34 NA Ignition transformer bracket 1
35 22334 Ignition transformer 1
36 22335 Combustion blower as-
sembly
1
37 22336 Fuel supply line 1
38 NA Solenoid valve (comb. w/
pump)
1
39 22338 Solenoid pump 1
40 22339 Tip-over switch 1
41 NA Waterproof gasket 1
42 22341 Thermostat control board 1
# P/N DESC. QTY
43 22342 Rear plastic cover 1
44 NA Led Lens 1
45 NA LED display lens 1
46 NA Thermostat retention nut 1
47 22346 On/Off Switch 1
48 22347 Thermostat knob 1
49 NA Power cord 1
50 NA strain relief 1
51 22350 Rear cover 1
52 NA Seal ring 1, outer 1
53 NA seal ring 2, inner 1
54 NA Heat Shield 1
55 NA Combustion chamber rear 1
56 NA Combustion chamber rear 1
57 22356 Carry Handle 1
58 NA Air gap bracket 1
59 22358 Combustion chamber 1
60 NA Front combustion ring 1
61 NA External retention ring 1
62 22361 Front safety guard 1
63 22362 Lower heat Shield 1
** NA Hardware Kit (not shown) 1
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WIRING DIAGRAM
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.
HS: hallsenor
PH: photocell
TP: temp probe
SW: switch
ST: safety thermostat
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