Desa Btu User Manual [en, es]

PROPANE CONSTRUCTION CONVECTION HEATER

OWNER’S MANUAL

Variable 15,000/25,000

Btu/Hr Models

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, and/or carbon monoxide poisoning.

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

Unpacking ........................................................... 3

Product Identiﬁcation ........................................... 3

Theory of Operation ............................................ 3

Ventilation ............................................................

Propane Supply ................................................... 4

Installation ........................................................... 4

Operation ............................................................. 4

Storage ................................................................ 5

Save this manual for future reference.

For more information, visit www.desatech.com

Maintenance ........................................................ 5

Inspecting Burner ................................................ 5

Speciﬁcations ...................................................... 6

Technical Service ................................................ 6

Troubleshooting ...................................................

Illustrated Parts Breakdown and Parts List ......... 7

Replacement Parts .............................................. 7

Warranty and Repair Service .............................. 8

SAFETY INFORMATION

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 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 au

thority 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! 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.

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

dard for Storage and Handling of Liqueﬁed Petroleum Gas, ANSI/NFPA 58. This instructs

on the safe storage and handling of propane/LP gases.

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

3. Use only propane gas set up for vapor with drawal.

4. For indoor and outdoor use. When used in doors, use only in well-vented areas. Provide at least 120 square inches (774.2 cm outside air before using heater.

5. Do not use heater in occupied dwellings, sleeping quarters, campers, tents, or any type of unvented or enclosed area.

6. 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.

7. Do not use heater as a cooking device. Do not place objects on top of heater.

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

9. Minimum heater clearances from combus tibles: Sides - 3 feet (1 meter), Top - 6 feet (1.8 meters).

10. Keep heater at least 6 feet from propane tank(s).

11. Keep propane tank(s) below 100º F (38° C).

12. Before each use, check heater for leaks. 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.

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

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

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

16. Do not use heater if altered.

Stan-

) of fresh,

www.desatech.com

113325-01C

SAFETY INFORMATION

Continued

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

18. Never block air inlet (top of base) or air outlet (around top of shell) of heater.

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

20. Never operate heater while sleeping or unat tended.

21. Keep children and animals away from heater.

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

23. To prevent injury, wear gloves when handling heater.

24. Always remove heater from propane tank after each use. Always store propane tank outdoors in a well ventilated space out of the reach of children. Never store propane tank in a building, garage, or any other enclosed area. Never store propane tank near high heat, open ﬂame, or where temperatures exceed 120° F (49° C).

25.

Turn off propane supply to heater when not in use.

26. 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.

27. Keep all connections and fittings clean. Make sure propane tank valve outlet is clean. Check the rubber “O” ring on the heater inlet fuel connector for damage before each use. Replace if worn or damaged.

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.

PRODUCT

IDENTIFICATION

Top

Shell

Base

Piezo Ignitor Button

Gas Inlet Connector

Hose/Regulator/ Fuel Gas Connector Assembly

Figure 1 - Product Identiﬁcation

Automatic Control Valve Button

THEORY OF OPERATION

The Fuel System: The hose/regulator assembly

attaches to the propane gas supply. This provides fuel to the heater.

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.

VENTILATION

WARNING: Provide at least an 120-square-inch (774.2 cm 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.

)

113325-01C 3

www.desatech.com

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) This heater is designed to operate with a minimum

20 lb. (9 kg) tank. You may need two or more tanks or one larger tank in colder weather. Use a 100 lb. (45 kg) 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.

Temperature Number of tanks, at Tank Location 100 lb (45 kg)

above 0° F (-18° C) 1 below 0° F (-18° C) 2

Smaller tanks can be used for limited run times but it is recommended to use larger tanks for optimum performance.

INSTALLATION

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. Wrench tighten the fuel connector nut into the propane tank valve (see Figure 2). Turn fuel connector nut counterclockwise to tighten. Threads are left-handed.

2. Connect hose to inlet connector (see Figure

3). Tighten ﬁrmly using a wrench.

3. Open propane supply valve on propane tank(s)

Note: if not opened slowly, excess-

slowly. ﬂow check valve on propane tank may stop gas ﬂow. If this happens, you may hear a click inside the regulator assembly, this is the check valve closing. To reset the excess-ﬂow check valve, close propane supply valve and open it again slowly.

www.desatech.com

4. Check all connections for leaks. Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak that must be corrected.

5. Close propane supply valve.

Propane Supply Valve

Hose

Propane Tank

Figure 2 - Connecting Heater to Propane

Piezo Ignitor

Hose

Inlet Connector

Figure 3 - Hose and Inlet Connector, Automatic Control Valve Button and

Piezo Ignitor Button Locations

Tank

Automatic Control Valve Button

POL Fitting

Regulator

OPERATION

WARNING: Review and understand the warnings in the Safety Information section, page 2. They 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 on heater.

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

4. Turn the heater regulator knob clockwise to the “HI” position.

113325-01C

OPERATION

Continued

5. Push in and hold automatic control valve button (see Figure 3). Push and release piezo ignitor button. Keep pushing piezo ignitor button until the burner lights. Hold control knob down for a maximum of 10 seconds while attempt ing ignition. If heater does not light, release control knob and wait 30 seconds. Repeat step 5 to start heater. face away from outlet (around top of shell) of heater while attempting to start heater. After ignition, hold control knob down for approximately 30 seconds. This activates the automatic control system.

6. If burner will not light after repeated tries, do not attempt to repair heater. Return heater to nearest authorized service center or call DESA Heating Productsʼ Technical Service at 1-866-672-6040.

7. When burner remains lit, you can turn the heater regulator knob clockwise to the desired heat setting. If burner goes out, turn off gas. Check fuel supply. If fuel supply is OK, restart heater.

Note: Keep hands and

TO STOP HEATER

1. Tightly close propane supply valve on propane tanks by turning clockwise. Wait 15 minutes for the heater to cool before handling heater.

2. Always remove the gas supply hose from the heater and the propane tank after each use.

TO RESTART HEATER

1. Wait ﬁve minutes after stopping heater.

2. Repeat steps under To Start Heater

, page 4.

STORAGE

CAUTION: Disconnect heater

from propane supply tank(s).

1. Do not store heater while attached to propane tank. Remove the gas supply hose from the propane tank by turning the fuel gas connector nut clockwise.

2. Store propane tank(s) in safe manner. Refer to Chapter 5 of Standard for Storage and

Handling of Liqueﬁed Petroleum Gases, ANSI/ NFPA 58. Follow all local codes. Always store

propane tanks outdoors. Never store propane tank in an enclosed area.

3. Place plastic cover caps over brass ﬁttings on inlet connector and hose/regulator assembly.

4. Store in a dry, clean, and safe place.

MAINTENANCE

WARNING: Never attempt to service heater while it is connected to propane supply, operating, or hot. Severe burns can occur.

1. Keep heater clean.

2. Inspect heater before each use. Check connec tions for leaks. Apply mixture of liquid soap and water to connections. Bubbles forming show a leak that must be corrected. Correct all leaks at once.

3. Inspect hose/regulator assembly before each use. If hose is highly worn or cut, replace.

4. Have heater inspected yearly by a qualiﬁed service person.

INSPECTING BURNER

WARNING: Heater shell, top, and heated air from heater is very hot during operation. Gradually move in closer to heater to ob serve ﬂame color. Do not touch heater shell or top. Do not get too close to heated air from heater. Severe burns could occur.

To check for correct burner ﬂame, look through the ventilation holes in the top of the heater to see the burner ﬂame. The burner ﬂame should be mostly blue with slight yellow coloring on the ends. If the burner ﬂame is mostly yellow, the primary air openings on the burner tube under the heater base may be blocked (see Figure 4).

1. Stop heater (see To Stop Heater) and let cool.

2. Turn heater over to locate the primary air open ings on the burner tube (see Figure 4). Remove any debris blocking the primary air openings.

Burner Tube

Figure 4 - Bottom View of Heater

Primary Air Openings

113325-01C 5

www.desatech.com

+ 11 hidden pages