Desa ROPANE CONSTRUCTION HEATER User Manual

PROPANE CONSTRUCTION HEATER

OWNER’S MANUAL

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Variable

30,000, 40,000,

50,000 Btu/Hr

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

PROPANE SUPPLY.................................................................... 3

THEORY OF OPERATION ......................................................... 4

ASSEMBLY................................................................................. 4

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

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

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

STORAGE................................................................................... 6

MAINTENANCE .......................................................................... 6

TROUBLESHOOTING ................................................................ 7

SERVICE PROCEDURES .......................................................... 8

ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ....... 10

SPECIFICATIONS .................................................................... 12

ACCESSORIES ........................................................................ 12

REPLACEMENT PARTS .......................................................... 12

OWNER’S REGISTRATION FORM.......................................... 13

WARRANTY AND REPAIR SERVICE ........................ Back Cover

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SAFETY INFORMATION

WARNINGS

WARNING: This product contains and/or generates chemicals known to the State of California to cause cancer or birth defects, or other reproductive harm.

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/CGA 2.14. 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 may 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.

• 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 Natural 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 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.

• Use only a three-prong, grounded 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 1.5-square-foot opening of fresh, outside air.

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

• 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 below ground level. Propane gas is heavier than air. If a leak occurs, propane gas may sink to the lowest possible level.

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

• Minimum heater clearances from combustibles: Outlet: 6 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 before using heater.

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

• Not intended for use on finished floors.

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

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

• Do not leave heater unattended.

• Keep children and animals away from heater.

• Never move, handle, or service a hot, operating, or plugged-in heater. Severe burns may result. Wait 20 minutes after turning heater off.

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105331-01C

SAFETY INFORMATION

PRODUCT IDENTIFICATION

UNPACKING

PROPANE SUPPLY

SAFETY INFORMATION

Continued

• 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 off propane supply and unplug heater when not in use.

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

PRODUCT IDENTIFICATION

Hot Air Outlet (Front)

Heater Base

Piezo Ignitor Button

Automatic Control Valve Knob

Shell

Handle

Motor

Fan

Power Cord

Valve Inlet

UNPACKING

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.

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 and/or CAN/CGA B149.2. 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)

This heater is designed to operate with a minimum 20-pound propane tank. You may need two or more tanks or one larger tank in colder weather. Use a 100-pound tank for longer operation or in very cold weather. Less gas is vaporized at lower temperatures. 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).

Average Number Of Temperature (°F) Tanks At Tank Location (100-pound)

40° 1 32° 1 20° 1 10° 1

0° 1

-10° 2

-20 ° 2

Hose / Regulator Assembly

Figure 1 - 50,000 BTU/Hr Model

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THEORY OF OPERATION ASSEMBLY

INSTALLATION

THEORY OF OPERATION

The Fuel System: The hose/regulator assembly attaches to the

propane gas supply. This provides fuel to the heater.

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 piezo ignitor lights the burner. The Automatic Control System: This system causes the heater to

shut down if the ﬂame goes out.

Combustion Chamber

Clean Heated Air Out (Front)

Air For Combustion Air For Heating

Figure 2 - Cross Section Operational View

Fan

Motor

Cool Air In (Back)

Hose/ Regulator Assembly

Flat Side Facing Up

Nut Clip

Shell

Slot

Figure 4 - Installing Nut Clip

Screws

Handle

Nut Clip

Rear of Heater

ASSEMBLY

1. Remove screw from top of fan guard (see Figure 3). Discard screw.

2. Insert nut clip (provided with handle) with flat side facing up through slot in top of shell. Align holes in nut clip with screw hole behind slot in top of shell. (see Figure 4).

3. Place handle over hole and clip. Insert two screws (provided with handle) through handle and tighten into shell. Make sure rear screw goes through shell and into fan guard. Tighten screws firmly.

Screw

Figure 3 - Removing Screw from Top of Fan Guard

Figure 5 - Attaching Handle

INSTALLATION

WARNING: Review and understand the warnings

in the

Safety Information

are needed to safely operate this heater. Follow all local codes when using this heater.

WARNING: Test all gas piping and connections for leaks after installation 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, page 3).

2. Connect fuel gas ﬁtting on hose/regulator assembly to propane tank(s). Turn fuel gas ﬁtting counterclockwise into threads on tank. Tighten ﬁrmly using a wrench. tion regulator so that hose leaving the regulator is in a horizontal position (see Figure 6, page 5). This places the regulator vent in the proper position to protect it from the weather.

section, pages 2 and 3. They

IMPORTANT:

Posi-

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105331-01C

INSTALLATION

VENTILATION

OPERATION

To Start Heater

INSTALLATION

Continued

3. Connect hose to valve inlet. Tighten ﬁrmly using a wrench. You must use the regulator supplied with heater.

4. Open propane supply valve on propane tank(s) slowly. 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. Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak that must be corrected.

6. Close propane supply valve.

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 that must be corrected. Correct all leaks at once.

Regulator

Propane Supply Valve

Propane Tank

Figure 6 - Regulator Position

Fuel Gas Fitting

Note:

Hose

VENTILATION

WARNING: Provide at least a 1.5 square foot opening of fresh, outside air while running heater. If proper fresh, outside air ventilation is not provided, carbon monoxide poisoning can occur. Provide proper fresh, outside air ventilation before running heater.

OPERATION

WARNING: Review and understand the warnings in the

Safety Information

are needed to safely operate this heater. Follow all local codes when using this heater.

TO START HEATER

1. Follow all installation, ventilation, and safety information.

2. Locate heater on stable and level surface. Make sure strong drafts do not blow into front or rear of heater.

3. Plug power cord of heater into a three-prong, grounded extension cord. Extension cord must be at least six feet long. Extension cord must be UL listed.

Extension Cord Wire Size Requirements

Up to 50 feet long, use 18 AWG rated cord. 51 to 100 feet long, use 16 AWG rated cord. 101 to 200 feet long, use 14 AWG rated cord.

4. Plug extension cord into a 120 volt/60 hertz, 3-hole, grounded outlet. Motor will start. Fan will turn, forcing air out front of heater.

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

section, pages 2 and 3. They

Note:

Knob

Valve Inlet

Hose

Figure 7 - Hose and Inlet Connector

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105331-01C

WARNING: Be sure motor and fan are running before pushing in automatic control valve button. Flames could flash outside heater if motor and fan are not running.

6. Turn control knob to the low position and push in (see Figure 8 and 9, page 6). Hold knob in and push piezo ignitor button. You may need to push piezo ignitor button 3-8 times until the main burner lights. When main burner lights, keep automatic control valve knob pushed in. Release button after 30 seconds.

Note:

If main burner fails to light, hose may have air in it. If so, keep control knob pressed and wait 20 seconds. Release control knob and wait 20 seconds for unburned fuel to exit heater. Repeat step 6.

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