Desa FORCED AIR HEATER User Manual

PROPANE CONSTRUCTION FORCED AIR HEATER

OWNER’S MANUAL

For more information, visit www.desatech.com

30,000 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

FUNDAMENTALS OF OPERATION ........................................... 3

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

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

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

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

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

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

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

SPECIFICATIONS ...................................................................... 6

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

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

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

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

TECHNICAL SERVICE ............................................................. 12

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

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

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

Save this manual for future reference.

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/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.

• 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.

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

• 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 one-square-foot opening of fresh, outside air.

• 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 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.

• Do not use heater in areas with high dust content. Dust is combustible.

• 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 with hose specified by manufacturer 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.

For more information, visit www.desatech.com

104163-01G

SAFETY INFORMATION

PRODUCT IDENTIFICATION

UNPACKING

FUNDAMENTALS OF OPERATION

SAFETY INFORMATION

Continued

• 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. You must wait 15 minutes after turning heater off.

• To prevent injury, wear gloves when handling heater.

• Never attach duct work to front or rear of 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)

Outer Shell

Handle

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.

FUNDAMENTALS 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.

Fan

Motor

Clean Heated Air Out (Front)

Cool Air In (Back)

Piezo Ignitor Button

Automatic Control Valve Button

Figure 1 - 30,000 BTU/Hr Model

For more information, visit www.desatech.com

104163-01G

Motor

Power Cord

Hose/Regulator Assembly

Combustion Chamber

Air For Combustion Air For Heating

Hose/Regulator Assembly

Figure 2 - Cross Section Operational View

ASSEMBLY

PROPANE SUPPLY INSTALLATION

ASSEMBLY

1. Remove screw from top of fan guard. 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.

Remove Screw

Figure 3 - Removing Screw from Top of Fan Guard

Flat Side Facing Up

Slot

Nut Clip

Shell

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 Temp (°F) No. Of Tanks

At Tank Location (100-pound)

40° 1 32° 1 20° 1 10° 1

0° 1

-10° 2

-20° 2

Figure 4 - Installing Nut Clip

Nut Clip

Figure 5 - Attaching Handle

INSTALLATION

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

Screws

Handle

Rear of Heater

For more information, visit www.desatech.com

codes when using this heater.

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).

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

Safety Information

WARNING: Test all gas piping and connections

tank(s). Turn POL ﬁtting counterclockwise into threads on tank. Tighten firmly using wrench. tor 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, page 2. They are

IMPORTANT:

Position regula-

104163-01G

INSTALLATION

VENTILATION

OPERATION

To Start Heater

INSTALLATION

Continued

3. Connect hose to valve inlet (see Figure 7). Tighten ﬁrmly using a wrench.

IMPORTANT:

tra 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 will stop gas flow. You may hear a click from the excess-flow check valve closing. If this happens, reset the excess-flow check valve by closing 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.

Propane Supply Valve

Propane Tank

Use extra hose or piping if needed. Install ex-

Hose

POL Fitting

Regulator

OPERATION

WARNING: Review and understand the warnings in the 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

3. Plug power cord of heater into a three-prong, grounded exten-

4. Plug extension cord into a 120 volt/60 hertz, 3-hole, grounded

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

Safety Information

drafts do not blow into front or rear of heater.

sion cord. Extension cord must be at least six feet long. Extension cord must be UL listed.

Extension Cord Wire Size Requirements

• Up to 50 ft long, use 18 AWG rated cord.

• 51 to 100 ft long, use 16 AWG rated cord.

• 101 to 200 ft long, use 14 AWG rated cord.

outlet. Motor will start. Fan will turn, forcing air out front of heater.

not opened slowly, excess-flow check valve on propane tank will stop gas flow. You may hear a click from the excess-flow check valve closing. If this happens, reset the excess-flow check valve by closing propane supply valve and open again slowly .

section, page 2. They are

Figure 6 - Regulator Position

Figure 7 - Hose and Inlet Connector

VENTILATION

WARNING: Provide at least a one 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.

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. Push in and hold automatic control valve button (see Figure

8). Push piezo ignitor button (see Figure 8). Keep pushing ignitor button until the burner lights. When burner lights, keep automatic control valve button pushed in. Release button after 30 seconds. This activates the automatic control system.

Note:

If heater fails to ignite, hose may have air in it. If so, keep automatic control valve button pressed and wait 20 seconds. Release automatic control valve button and wait 20 seconds for unburned fuel to exit heater . Repeat this step.

Piezo Ignitor Button

Automatic Control Valve Button

Figure 8 - Automatic Control Valve Button and Piezo Ignitor Button

104163-01G

For more information, visit www.desatech.com

+ 11 hidden pages