Desa LP155AT User Manual

PROPANE CONSTRUCTION HEATER

OWNER’S MANUAL

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LP155AT Models

150,000 Btu/Hr with Built-in Thermostat

IMPORTANT: Read and understand this manual before assembling, starting or servicing heater. Improper use of heater can cause serious injury. Keep this manual for future reference.

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.

TABLE OF CONTENTS

SAFETY INFORMATION ............................................................ 2

PRODUCT IDENTIFICATION ..................................................... 3

UNPACKING............................................................................... 3

THEORY OF OPERATION ......................................................... 3

PROPANE SUPPLY .................................................................... 4

INSTALLATION........................................................................... 4

VENTILATION............................................................................. 5

OPERATION ............................................................................... 5

STORAGE................................................................................... 5

MAINTENANCE .......................................................................... 5

SERVICE PROCEDURES .......................................................... 6

SPECIFICATIONS ...................................................................... 7

WIRING DIAGRAMS................................................................... 7

ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ......... 8

ACCESSORIES ........................................................................ 10

TECHNICAL SERVICE ............................................................. 10

REPLACEMENT PARTS .......................................................... 10

WARRANTY AND REPAIR SERVICE ...................................... 12

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SAFETY INFORMATION

WARNINGS

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: NOT FOR HOME OR RECREATIONAL VEHICLE USE.

The heater is designed for use as a construction heater in accordance with ANSI Z83.7/CGA2.14. Other standards govern the use of fuel gases and heating products for specific uses. Your local authority can advise you about these. The primary purpose of construction heaters is to provide temporary heating of buildings under construction, alteration or repair. Properly used, the heater provides safe economical heating. Products of combustion are vented into the area being heated.

We cannot foresee every use which may be made of our heaters.

Check with your local fire safety authority if you have questions about heater use.

Other standards govern the use of fuel gases and heat producing products for specific uses. Your local authorities can advise you about these.

Carbon Monoxide Poisoning: Some people are more affected by carbon monoxide than others. Early signs of carbon monoxide poisoning resemble the ﬂu, with headaches, dizziness, and/or nausea. If you have these signs, the heater may not be working properly. Get fresh air at once! Check for proper ventilation and have heater serviced.

Propane Gas: Propane gas is odorless. An odor-making agent is added to propane gas. The odor helps you detect a propane gas leak. However, the odor added to propane gas can fade. Propane gas may be present even though no odor exists.

Make certain you read and understand all Warnings. Keep this manual for reference. It is your guide to safe and proper operation of this heater.

• Approved by the New York City Fire Department under Certificate of Approval #4953. To be used only at construction site with applicable New York City Codes, Regulations, Rules, Directives, Permits, etc.

• This product has been approved for use in the Commonwealth of Massachusetts.

• This heater produces carbon monoxide, which is listed by the State of California as a reproductive toxin under Proposition 65.

• Install and use heater with care. Follow all local ordinances and codes. In the absence of local ordinances and codes, refer to the Standard

for Storage and Handling of Liquefied Petroleum Gas, ANSI/NFPA 58 and the Propane Gas Installation Code, CAN/CGA B149.2. This

instructs on the safe storage and handling of propane gases.

• Use only the electrical voltage and frequency speciﬁed on model plate. The electrical connections and grounding of the heater shall follow the National Electric Code, ANSI/NFPA 70 or the Canadian

Electrical Code, Part 1.

• Electrical grounding instructions — This appliance is equipped with a three-prong (grounding) plug for your protection against shock hazard and should be plugged directly into a properly grounded three-prong receptacle or extension cord.

• Use only the hose and factory preset regulator provided with the heater.

• Use only propane gas set up for vapor withdrawal.

• Provide adequate ventilation. Before using heater, provide at least a three-square-foot opening of fresh, outside air for each 100,000 Btu/ Hr of rating.

• For indoor use only. Do not use heater outdoors.

• Do not use heater in occupied dwellings or in living or sleeping quarters.

• Do not use heater in a basement or below ground level. Propane gas is heavier than air. If a leak occurs, propane gas will sink to the lowest possible level.

• Keep appliance area clear and free from combustible materials, gasoline, paint thinner, and other flammable vapors and liquids. Dust is combustible. Do not use heater in areas with high dust content.

• Minimum heater clearances from combustible materials: Outlet: 8 Ft. Sides: 2 Ft. Top: 6 Ft. Rear: 2 Ft.

• Keep heater at least six feet from propane tank(s). Do not point heater at propane tank(s) within 20 feet.

• Keep propane tank(s) below 100° F.

• Check heater for damage before each use. Do not use a damaged heater.

• Check hose before each use of heater . If highly worn or cut, replace with hose specified by manufacturer before using heater.

• Locate heater on stable and level surface if heater is hot or operating.

• Never block air inlet (rear) or air outlet (front) of heater .

• Keep heater away from strong drafts, wind, water spray, rain, or dripping water.

• Keep children and animals away from heater.

• This heater is equipped with a thermostat. Heater may start at anytime.

• Never move, handle, or service a hot or operating heater. Severe burns may result. You must wait 15 minutes after turning heater off.

• To prevent injury, wear gloves when handling heater.

• Never attach duct work to heater .

• Do not alter heater. Keep heater in its original state.

• Do not use heater if altered.

• Turn of f propane supply to heater and unplug heater when not in use.

• Use only original replacement parts. This heater must use designspecific parts. Do not substitute or use generic parts. Improper replacement parts could cause serious or fatal injuries.

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103014

PRODUCT IDENTIFICATION

PRODUCT IDENTIFICATION UNPACKING

Hot Air Outlet (Front)

Lower Shell

Hose/Regulator Assembly

On/Off Switch

Upper Shell

Handle

Fan Guard

Power Cord

Thermostat Knob

Inlet Connector

1. Remove all packing items applied to heater for shipment. Keep

plastic cover caps (attached to inlet connector and hose/regulator assembly) for storage.

2. Remove all items from carton.

3. Check all items for shipping damage. If heater is damaged,

promptly inform dealer where you bought heater.

THEORY OF OPERATION

The Fuel System: The hose/regulator assembly attaches to the propane gas supply. The propane gas moves through the solenoid valve and out the nozzle.

The Air System: The motor turns the fan. The fan pushes air into and around the combustion chamber. This air is heated and provides a stream of clean, hot air.

The Ignition System: The direct spark ignitor (DSI) sends voltage to the spark plug/ignitor. The spark plug/ignitor ignites the fuel and air mixture.

The Safety Control System: This system causes the heater to shut down if the flame goes out.

UNPACKING

THEORY OF OPERATION

Figure 1 - 150,000 Btu/Hr Model

Clean Heated Air Out (Front)

Combustion Chamber

Nozzle

Air For Combustion Fuel

Air For Combustion And Heating

Ignitor

DSI

Solenoid Valve

Fan

On/Off Switch

Fuel

Motor

Cool Air In (Back)

Power Cord

Hose/Regulator Assembly

Figure 2 - Cross Section Operational View

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103014

PROPANE SUPPLY

INSTALLATION

PROPANE SUPPLY

Propane gas and propane tank(s) are to be furnished by the user. Use this heater only with a propane vapor withdrawal supply

system. See Chapter 5 of the Standard for Storage and Handling of Liquefied Petroleum Gas, ANSI/NFPA 58. Your local library or fire department will have this booklet.

The amount of propane gas ready for use from propane tanks varies. Two factors decide this amount:

1. The amount of propane gas in tank(s)

2. The temperature of tank(s) The chart below shows the number of 100 pound tanks needed to run

this heater. Do not operate this product with any tank smaller than 100 pounds.

Number of

Temperature (°F) At Tank Location

32 20 10

-10

-20

tanks (150,000

Btu/Hr)

2 2 3 3

(Use larger

tank)

Less gas is vaporized at lower temperatures. You may need two or more 100 pound tanks or one larger tank in colder weather. Your local propane gas dealer will help you select the proper supply system. The minimum surrounding-air temperature rating for each heater is -20°F (-29°C).

3. Connect hose to inlet connector. T ighten firmly using a wrench.

IMPORTANT:

Extra hose or piping may be used if needed. Install extra hose or piping between hose/regulator assembly and propane tank. You must use the regulator supplied with heater.

4. Open propane supply valve on propane tank(s) slowly.

Note:

If not opened slowly , excess-flow check valve on propane tank may stop gas flow. If this happens, close propane supply valve and open again slowly.

5. Check all connections for leaks.

WARNING: Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

6. Close propane supply valve.

Hose

Supply Valve

Propane Tank

Regulator

Vent (pointing down)

POL Fitting

INSTALLATION

WARNING: Review and understand the warnings in the needed to safely operate this heater. Follow all local codes when using this heater.

for leaks after installing or servicing. Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

1. Provide propane supply system (see Propane Supply, column 1).

2. Connect POL fitting on hose/regulator assembly to propane

Safety Information

section, page 2. They are

WARNING: Test all gas piping and connections

tank(s). Turn POL fitting counterclockwise into threads on tank. Tighten firmly using wrench. Tighten regulator with vent pointing down.

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Figure 3 - Regulator With Vent Pointing Down

Hose

Inlet Connector

Figure 4 - Hose and Inlet Connector

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