DeWalt DXH35FAHC Instruction Manual
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INSTRUCTION MANUAL
GUIDE DE’UTILISATION
MANUAL DE INSTRUCCIONES
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Forced Air Propane Construction Heater DXH35FAHC
appareil de chauffage au propane à air pulsé pour chantier de construction DXH35FAHC
Calentador De propano a aire forzado para construcción DXH35FAHC
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.
English
2
WARNING: NOT FOR HOME OR RECREATIONAL VEHICLE USE.
USING A PORTABLE HEATER IN AN ENCLOSED AREA CAN PRODUCE
DEADLY CARBON MONOXIDE.
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.
The heater is designed and approved for use as a construction heater in
accordance with Standard ANSI Z83.7 • CSA 2.14. CHECK WITH YOUR LOCAL
FIRE SAFETY AUTHORITY IF YOU HAVE QUESTIONS ABOUT APPLICATIONS.
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 5.
WARNINGS
Fuels used in liquefied propane gas appliances, and the products of combustion
of such fuel, can expose you to chemicals including benzene, which is known
to the state of california to cause cancer and cause birth defects or other
reproductive harm, for more information go to www.P65Warnings.ca.gov
CONTENTS
WARNINGS
2
HEATER SPECIFICATIONS
3
ODOR FADE WARNINGS
4
SAFETY PRECAUTIONS
5
LIGHTING/OPERATING INSTRUCTIONS
5
MAINTENANCE AND SERVICE
6
EXPLODED VIEW AND PARTS LIST
7
LIMITED WARRANTY
8
3
English
Specications
MODEL NO.: ..................................................................................DXH35FAHC
GAS TYPE: ..................................................... FOR USE WITH PROPANE ONLY
BURN RATE (BTU/HR): .............................................35,000 BTU/hr (10.25 kW)
ELECTRICAL INPUT ........................................................115 V, 60 HZ, 1 Ø, 3 A
• Minimum operating voltage: 100V
• When using an extension cord, make certain that it is a 3-wire (grounded)
cord of proper wire size, minimum length of 6 ft (1.83m).
IGNITION .......................................................................... Manual, piezo ignition
PRIMARY FLAME CONTROL........................Thermocouple Operated Gas Valve
HIGH TEMPERATURE CONTROL ...............................................240 °F (116 °C)
Minimum ambient temperature rating: 0 °F (-17.8°C)
Operating Precautions
This is a propane, direct-fired, forced air heater. It’s intended use is primarily
temporary heating of buildings under construction, alteration or repair.
Propane is heavier than air. If propane leaks from a connection or fitting, it sinks to the
floor, collecting there with the surrounding air, forming a potentially explosive mixture.
Obviously, propane leaks should be avoided, so set up the propane supply with
utmost care. Leak check new connections or reconnections with a soap and water
solution applied to connection: look for bubbles, listen for hiss of escaping gas, feel
for extreme cold, smell for rotten egg odor. Do not use if leaking! Follow all connection
instructions herein. Also, ask your propane dealer for advice on the propane
application and supply installation and ask him to check it if there are any questions.
This heater was designed and certified for use as a construction heater in accordance
with ANSI Standard Z83.7 • CGA 2.14. Check with your local fire safety authority if
you have any questions about your applications. Other standards govern the use of
fuel gases and heat producing products in specific applications. Your local authority
can advise you about these.
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.
We can tolerate small amounts but not a lot. 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
So, be sure to follow advice about ventilation in these operating instructions.
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.
Maximum Pressure to Regulator ................................................. Bottle Pressure
Minimum Pressure to Regulator .................................................20 psi (138 kPa)
Pressure From Regulator [Manifold Pressure] ...........................10 psi (68.9 kPa)
Fuel Consumption: .......................................................... 1.6 lbs/hr (0.72 kg/hr)
Gas Supply
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.
- An LP cylinder not connected for use shall not be stored in the vicinity of this
or any other appliance.
- WHAT TO DO IF YOU SMELL GAS
Ǟ Do not try to light appliance.
Ǟ Extinguish any open flame.
Ǟ Shut off gas to appliance.
- Service must be performed by a qualified service agency.
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4
WARNING
Asphyxiation Hazard
• Do not use in unventilated areas
• The ow of combustion and ventilation air must not be obstructed
• Proper ventilation air must be provided to support the combustion
air requirements of the heater being used.
• Refer to the specication section of the heater’s manual, heater
dataplate, or contact the factory to determine combustion air
ventilation requirements of the heater.
• Lack of proper ventilation air will lead to improper combustion
• Improper combustion can lead to carbon monoxide poisoning leading to serious injury or death. Symptoms of carbon monoxide poisoning can include headaches, dizziness and difculty in breathing.
Fuel Gas Odor
LP gas and natural gas have man-made odorants added specically for
detection of fuel gas leaks. If a gas leak occurs you should be able to smell
the fuel gas. Since Propane (LP) is heavier than air you should smell for the
gas odor low to the oor. ANY GAS ODOR IS YOUR SIGNAL TO GO INTO
IMMEDIATE ACTION!
• Do not take any action that could ignite the fuel gas.
• Do not operate any electrical switches.
• Do not pull any power supply or extension cords.
• Do not light matches or any other source of flame.
• Do not use your telephone.
• Get everyone out of the building and away from the area immediately. Close all
propane (LP) gas tank or cylinder fuel supply valves, or the main fuel supply valve
located at the meter if you use natural gas.
• Propane (LP) gas is heavier than air and may settle in low areas. When you have
reason to suspect a propane leak, keep out of all low areas.
• Use a telephone remote from the area of the leak and call your fuel gas supplier
and your fire department. Do not re-enter the building or area.
• Stay out of the building and away from the area until declared safe by the
firefighters and your fuel gas supplier.
• FINALLY, let the fuel gas service person and the firefighters check for escaped
gas. Have them air out the building and area before you return. Properly trained
service people must repair any leaks, check for further leakages, and then relight
the appliance for you.
Odor Fading - No Odor Detected
• Some people cannot smell well. Some people cannot smell the odor of the manmade chemical added to propane (LP) or natural gas. You must determine if you
can smell the odorant in these fuel gases.
• Learn to recognize the odor of propane (LP) gas and natural gas. Local propane
(LP) gas dealers will be more than happy to give you a scratch and sniff pamphlet.
Use it to become familiar with the fuel gas odor.
• Smoking can decrease your ability to smell. Being around an odor for a period
of time can affect your sensitivity to that particular odor. Odors present in animal
confinement buildings can mask fuel gas odor.
• The odorant in propane (LP) gas and natural gas is colorless and the
intensity of its odor can fade under some circumstances.
• If there is an underground leak, the movement of gas through the soil can filter the
odorant.
• Propane (LP) gas odor may differ in intensity at different levels. Since Propane (LP)
gas is heavier than air, there may be more odor at lower levels.
• Always be sensitive to the slightest gas odor. If you continue to detect any
gas odor, no matter how small, treat it as a serious leak. Immediately go into
action as discussed previously.
ATTENTION - Critical Points to Remember!
• Propane (LP) gas has a distinctive odor. Learn to recognize these odors.
(Reference Fuel Gas Odor and Odor Fading sections on this same page)
• Even if you are not properly trained in the service and repair of the heater,
ALWAYS be consciously aware of the odors of propane (LP) gas and natural gas.
• If you have not been properly trained in repair and service of propane (LP) gas
then do not attempt to light heater, perform service or repairs, or make any
adjustments to the heater on the propane (LP) gas fuel system.
• A periodic sniff test around the heater or at the heater’s joints; i.e. hose,
connections, etc., is a good safety practice under any conditions. If you
smell even a small amount of gas, CONTACT YOUR FUEL GAS SUPPLIER
IMMEDIATELY. DO NOT WAIT!
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English
THIS IS A HEATING APPLIANCE. DO NOT ATTEMPT TO WARM OR COOK
FOOD ON THIS HEATER.
1. Check the heater thoroughly for damage. DO NOT operate a damaged heater.
2. DO NOT modify the heater or operate a heater which has been modified from its
original condition.
3. Use only propane gas.
4. Use only VAPOR WITHDRAWAL propane supply. If there is any question about
vapor withdrawal, ask your propane dealer.
5. Mount the propane cylinders vertically (shutoff valve up). Secure them from falling
or being knocked over and protect them from damage.
6. Locate propane containers at least (USA) 7 ft. (2.13m), (Canada) 10 ft. (3m) from
the heater and do not direct exhaust toward containers.
7. IMPORTANT Use only the hose and regulator assembly provided with the heater.
Match the color stripe on the hang tag attached to the hose assembly with the
color on the label located near the propane inlet fitting on the heater. Inspect hose
assembly before each use of the heater. If there is excessive abrasion or wear, or
hose is cut, replace with hose assembly listed on parts list before using heater.
8. For either indoor or outdoor use. Adequate ventilation must be provided.
Provide minimum openings of 1/2 sq. ft. (.046 m²) near the floor and 1/2 sq. ft.
(.046 m²) near the ceiling (also see “Operating Precautions”).
9. If at any time gas odor is detected, IMMEDIATELY DISCONTINUE operation until
the source of gas has been located and corrected.
10. Maintain minimum clearance from normal combustible material as follows:
floor-0 ft. (0 m); outlet-6 ft. (1.83m); sides-2 ft. (.61m); top-6 ft. (1.83m). Locate
10 ft. (3m) from canvas or plastic tarpaulins or similar coverings and secure them
to prevent flapping or movement due to wind action.
11. Due to the high surface and exhaust temperatures, adults and children must
observe clearances to avoid burns or clothing ignition.
12. Operate only on a stable, level surface.
13. Do not use with duct work. Do not restrict inlet or outlet.
14. Use only the 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).
15. Use only a properly grounded 3-prong receptacle or extension cord (6 ft (1.83m)
in length minimum).
Safety Precautions
16. Do not move, handle or service while hot or burning.
17. Use only in accordance with local codes or, in the absence of local codes, with
the Standard for the Storage and Handling of Liquefied Petroleum Gases ANSI/
NFPA 58 and CSA B149.1, Natural Gas and Propane Installation Code.
Lighting/Operating Instructions
Preparation for Operation
1. Check the heater for possible shipping damage. If any is found, immediately notify
the factory.
2. Follow all of the “Precautions”.
3. Connect the POL fitting of hose and regulator assembly to the propane cylinder
by rotating the POL nut counterclockwise into the propane cylinder’s valve outlet
and securely tighten with a wrench.
4. Connect the hose to the heater by rotating the hose fitting clockwise.
5. Securely tighten all gas connections.
6. Open the cylinder’s gas valve and check all gas connections with a soap and
water solution. DO NOT USE A FLAME.
7. Connect power cord to well-grounded 115V, 60 Hz, 1Ø source of power.
8. When using an extension cord, make certain that it is a 3-wire (grounded) cord of
proper wire size.
Starting Heater
1. THE HEATER POWER CORD MUST BE CONNECTED TO A GROUNDED 115V,
60HZ, 1Ø POWER SOURCE BEFORE HEATER IGNITION and always allow heater
fan (blower) to run for 20 seconds to purge fuel.
2. Open propane supply valve on propane tank slowly. Note: If not opened slowly,
excess-flow check valve will stop gas flow. If this happens, close propane supply
valve and open again slowly. Wait 15 seconds before Step 3.
CAUTION: Be sure motor and fan are running before pushing in manual
control valve button. Flames could flash outside heater or internal damage to
heater may result if motor and fan are not running.
3. Push and hold manual control valve button. Push piezo igniter button repeatedly
until the burner lights.
4. After the burner lights, keep the gas valve button depressed for 30 seconds then
release and the heater will continue to operate.
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6
Maintenance
1. The heater should be inspected before each use, and at least annually by a
qualified person.
2. Before each use, check the soft “O” ring seat at the bullnose of the POL fitting.
If the “O” ring is cut, scuffed, or otherwise damaged, replace it with part number
F273786.
3. Turn off the gas at the LP-gas supply cylinder(s) when the heater is not in use.
4. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of
this or any other appliance.
5. When the heater is to be stored indoors, the connection between the LP-gas
supply cylinder(s) and the heater must be disconnected and the cylinder(s)
removed from the heater and stored out of doors and in accordance with Chapter
5 of the standard for Storage and Handling of Liquefied Petroleum Gases ANSI/
NFPA 58 and CSA B149.1, Natural Gas and Propane Installation Code.
Stopping Heater
1. Securely close valve on the propane cylinder.
2. Continue to operate heater until all fuel in the hose has burned.
3. Unplug the power cord.
CAUTION: Always shut off fuel supply before disconnecting electrical power.
RESTART AFTER SAFETY SHUTDOWN
1. Securely close valve at propane cylinder. Unplug power cord.
2. Wait 5 minutes.
3. Restart following “START” procedure.
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. IMPORTANT Match the color stripe on the hang tag attached to the hose
assembly with the color on the label located near the propane inlet fitting on the
heater. Do not use alternates. For this heater, the regulator comes factory set as
shown in "specifications". If there is any uncertainty about the regulator setting, have
it checked.
A heater which is not working right must be repaired, but only by a trained,
experienced service person.
In-warranty products will be repaired with no charge for either parts or labor. Please
include a brief statement indicating date, place of purchase, the nature of the
problem and proof of purchase.
Out-of-warrranty products will be repaired with a charge for parts and labor.
Size and Capacity of Propane Cylinders Required
The charts below show the approximate size of the cylinder required for these
heaters. To use the chart:
1. Select the lowest air temperature expected (at the bottom of the chart).
2. Move straight up to time of operation desired (left side of chart).
3. Read the cylinder size required.
All heaters should have: full cylinders, good air circulation, no frost on cylinders
TIMe (Hrs.)
TIME (HRS.)
AMBIENT TEMPERATURE °F ( °C)
BTU’S PER HOUR REQUIRED
Cubic feet
of space
to be
heated
Temperature Rise Required ( °F)
20 ° 30 ° 40 ° 50 °
5,000 14,000 20,000 27,999 34,000
7,000 19,000 28,000 38,000 47,000
10,000 27,000 40,000 54,000 67,000
15,000 40,000 60,000 80,000 100,000
20,000 54,000 80,000 107,000 133,000
30,000 80,000 120,000 160,000 200,000
50,000 133,000 200,000 266,000 333,000
7
English
* Not shown in Figure
# Part # Description Qty
1 27436 Heater Body 1
2 28081 Valve w/Thermocouple 1
3 27442 Control Box Assy 1
4 26473 Piezo Igniter 1
5 28116 Nut Hex 5-28 TE Valve 2
6 27161 Nut, Piezo 1
7 21007
Hose & Regulator
Assembly
1
* 22130 Wire Assembly 1
8 28091
Nut Hex M8 x 1 Fine
Thd Thermocouple
2
9 28077
Fan Blade, 6.75 x .75
Pitch
1
10 28076 Motor 0.74 A 1
11 22101 Grille Assembly 1
# Part # Description Qty
12 40801 Handle 1
13 82136 Bushing Strain Relief 1
14 22113 Power Cord Assembly 1
15 26168
High Limit Switch 240
°F (116 °C)
1
16 28082 Thermocouple 1
17 28080 Electrode 1
DXH35FAHC REPLACEMENT PARTS LIST
3
2
8
9
11
10
14
13
15
16
8
17
5
6
12
1
4
7
INSTRUCTION MANUAL
FORCED AIR PROPANE CONSTRUCTION HEATER
DXH35FAHC
DEWALT®, GUARANTEED TOUGH® and the
yellow and black color scheme are trademarks
of the DEWALT Industrial Tool Co., used under
license. ©2017 DEWALT. EGI/Enerco Group Inc.
Under license from Dewalt Industrial Tool Co
Warning
USE ONLY MANUFACTURER’S REPLACEMENT PARTS. USE OF ANY
OTHER PARTS COULD CAUSE INJURY OR DEATH. REPLACEMENT PARTS
ARE ONLY AVAILABLE DIRECT FROM THE FACTORY AND MUST BE
INSTALLED BY A QUALIFIED SERVICE AGENCY.
PARTS ORDERING INFORMATION:
PURCHASING: Accessories may be purchased at any Dewalt® local dealer or
direct from the factory
FOR INFORMATION REGARDING SERVICE:
Please call Toll-Free 855-805-5745
www.dewalt.com
Our office hours are 8:00 AM – 5:00 PM, EST, Monday through Friday.
Please include the model number, date of purchase, and description of
problem in all communication.
LIMITED WARRANTY
DeWalt® warrants its heaters and accessories to be free from defects in material and workmanship for a period of 1 year from date of purchase.
DeWalt® will repair or replace this product free of charge if it has been prove
to be defective within the 1 year period, and is returned at customer expense
with proof of purchase to DeWalt® within the warranty period.
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