Dewalt DXH170FAVT Forced Air Propane Construction Heater Instruction Manual

Forced Air Propane Construction Heater
Instruction Manual 

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855-805-5745
www.dewalt.com 
Forced Air Propane Construction Heater DXH170FAVT
2018-40793-CB
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.

Definitions: 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 that, if not avoided, will result in death or serious injury.
WARNING: Indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation that, if not avoided, may result in minor or moderate injury.
NOTICE: Indicates a practice not related to personal injury that, if not avoided, may result in property damage.

WARNING: DO NOT OPERATE THIS HEATER UNTIL YOU READ AND UNDERSTAND THIS INSTRUCTION MANUAL FOR SAFETY , OPERATION, AND MAINTENANCE INSTRUCTIONS.
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.
DANGER:
CARBON MONOXIDE CAN KILL YOU
This heater produces carbon monoxide. Do not use in occupied spaces.
Ventilate building, room, or other enclosed spaces where heater has been used before entering. Never use it in a vehicle, camper, or tent.
WARNING:
Not for home or recreational vehicle use. Do not use it to cook warm food.
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 that do or may contain volatile or airborne combustibles, or products such as gasoline, solvents, paint thinner, dust particles or unknown chemicals.

WARNING: IF THE INFORMATION IN THIS MANUAL IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY, OR LOSS OF LIFE.

• Do not use gasoline or other flammable vapors or 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:
• Do not try to light appliances.
• Extinguish any open flame.
• Shut off gas to the appliance.
• Service must be performed by a qualified service agency.

WARNING:
Combustion byproducts produced when using this product contain carbon monoxide, a chemical known to the State of California to cause cancer and birth defects (or other reproductive harm).
This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

WARNING: RISK OF ELECTRICAL SHOCK

• Plug the power cord into a properly grounded 3-wire receptacle.
• Do not operate in wet or damp conditions.

WARNING: RISK OF FIRE OR EXPLOSION

• Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
• WHAT TO DO IF YOU SMELL GAS:
• Open windows.
• DO NOT try to light any appliance.
• DO NOT operate any electrical switches.
• DO NOT use any telephone in the building. Immediately call the local gas supplier from an outside telephone. Follow the gas supplier s instructions.
• DO NOT touch any electrical switch; do not use any phone in your building.
• If you cannot reach your gas supplier, call the Fire Department.

SPECIFICATIONS

Figure 1
VENTILATION: Minimum openings required

Figure 2: MINIMUM CLEARANCE: From normal combustible materials

Clearance  Forced Air 170FAVT

From floor ………………………………………………0 ft
From outlet ……………………………………………..8 ft
From sides ………………………………………………2 ft
From top ………………………………………………..3 ft
Locate 10 ft. from canvas or plastic tarpaulins or similar coverings and secure them to prevent flapping or movement due to wind action.

Operating Precautions

WARNING
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. Read enclosed Odor Fade and Propane Sheet for additional information about detecting propane leaks. Leak check new connections or reconnection with a soap and water solution and 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 airflow; 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

WARNING

1. Check the heater thoroughly for damage. DO NOT operate a damaged heater.
2. DO NOT modify the heater or operate a heater that 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 the hose is cut, replace it with the hose assembly listed on the parts list before using the heater.
8. For indoor use only. The area must be well ventilated. Figure 1. (also see “Operating Precautions”).
9. If at any time gas odor is detected, IMMEDIATELY Y DISCONTINUE operation until the source of gas has been located and corrected. Read the enclosed Odor fade and Propane Sheet for additional information about detecting propane leaks.
10. Install the heater such that it is not directly exposed to water spray, rain, and/or dripping water.
11. Maintain minimum clearance from normal combustible material (like paper). Figure 2.
12. Due to the high surface and exhaust temperatures, adults and children must observe clearances to avoid burns or clothing ignition.
13. Operate only on a stable, level surface.
14. Do not use ductwork. Do not restrict the inlet or exit.
15. 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).
16. Use only a properly grounded 3-prong receptacle or extension cord.
17. Do not move, handle or service while hot or burning.
18. Do not adjust the heater combustion tube elevation while the heater is running or hot. Adjustments to elevation should only be made after the heater has cooled to the touch.
19. 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.

Fuel Gas Odor—Fuel Leaks
WARNING
LP gas and natural gas have man-made odor-ants added specifically for the 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 the air you should smell for the gas odor low to the floor. ANY GAS ODOR IS YOUR SIGNAL  TO TAKE IMMEDIATE ACTION!

WARNING: RISK OF ASPHYXIATION

• Do not use in unventilated areas.
• The flow 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 specification section of the heater’s manual, heater data-plate, or contact the factory to determine the 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 difficulty in breathing.

Odor Fade Warning

• Do not take any action that could ignite the fuel gas. Do not operate any electrical switches. Do not plug in or disconnect 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 tanks 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 your neighbor’s phone 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.
• FINAL Y, 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 the odor of the man-made chemical added to propane (LP) or natural gas. You must determine if you can smell the odor-ant 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 out 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.
• 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.

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 above.
• 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 the repair and service of propane (LP) gas then do not attempt to light the heater, perform service or repairs, or make any adjustments to the heater on the propane (LP) gas fuel system.

Operating Instructions

PREPARING 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 the hose and regulator assembly to the propane cylinder by rotating the POL nut counterclockwise into the propane cylinder’s valve outlet and securely tightening it 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 the 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.

START

1. Slowly open the main valve at the propane cylinder to prevent the excess flow check valve from closing.
2. Set the thermostat to full on. The heater will ignite automatically.
3. Adjust the ball valve on the control panel to desired burn rate.
4. Set the thermostat to the desired temperature. The heater will turn off and on automatically as the temperature varies in the heated area.

STOP

1. Securely close the valve on the propane cylinder.
2. Continue to operate the heater until all fuel in the hose has burned.
3. Unplug the heater from the electrical supply.
   CAUTION: Failure to unplug the unit may result in unexpected operations.

RESTART AFTER SAFETY SHUTDOWN

1. The securely closed valve at the propane cylinder. Unplug heater.
2. Wait 5 minutes.
3. Restart following the “Start” procedure.

MAINTENANCE AND STORAGE

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 bull nose of the POL fitting. If the “O” ring is cut, scuffed, or otherwise damaged, replace it with part number 73786.
3. Turn off the gas at the LP-gas supply cylinder(s) when the heater is not in use.
4. 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.

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 another physical discomfort.
• There is no smoke or soot internal or external to the heater.
• There are no unplanned or unexplained shutdowns of the heater.
  The parts lists and wiring diagram show the heater as it was constructed. Do not use a heater that 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 must be set as shown in the “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 the date, place of purchase, the nature of the problem, and proof of purchase.
Out-of-warranty products will be repaired with a charge for parts and labor.

Size and Capacity of Propane Cylinders Required

The charts on the following page 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 the time of operation desired (left side of the chart).
3. Read the cylinder size required.

All heaters should have:

full cylinders
good air circulation
no frost on cylinders

HOW MUCH HEAT DO I REQUIRE? 

For the economy, it is important to match input to that required. But heat requirements often vary. For example, it usually takes a lot more heat to get things warm than it does to keep them that way. Likewise, outside air temperature usually changes during the day so you may need more heat at night than you do in the daytime. An approximation of the heat required can be found by using this chart.

WARNING
When using a thermostat-controlled heater, its exit area should be protected from personnel and warnings posted of a sudden startup.

RECOMMENDED MINIMUM GAUGE FOR CORD EXTENSIONS

COLOR CODE

If any original wiring as supplied by the heater must be replaced, it must be replaced with type AWG 105° C wire or its equivalent except as indicated (*type SF2-200, **SGI 250° C).

Parts List DXH170FAVT

INSTRUCTION MANUAL
Forced Air Propane Construction Heater
DXH170FAVT

Warning:
Use only the manufacturer’s replacement parts. The 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 the 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 the date of purchase.
DeWalt ® will repair or replace this product free of charge if it has been proven 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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