Desa Tech RLLP35, RLP30, RM40SP, RM40LP, SPC-40B Owner's Manual

PROPANE CONSTRUCTION FORCED AIR HEATER

OWNER'S MANUAL

30/35/40,000

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.

Safety Information ............................................... 2

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

Product Identiﬁca

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

Assembly ............................................................. 4

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

Installation ........................................................... 5

Ventilation

Operation ............................................................ 6

Storage ................................................................ 6

tion ........................................... 3

........................................................... 5

TABLE OF CONTENTS

Maintenance ........................................................ 7

Service Procedures ............................................. 7

Speciﬁcations

Troubleshooting ................................................. 10

Accessories ........................................................11

Technical Service ...............................................

Replacement Parts .............................................11

Illustrated Parts Breakdown and Parts List ....... 12

Warranty and Repair Service ............................ 14

Save this manual for future reference.

For more information, visit www.desatech.com

..................................................... 9

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 heater is designed for use as a construction heater in accordance with ANSI Z83.7•CGA2.14-

2000. 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 warn ings. 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

Standard for Storage and Handling of Lique ﬁed 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.

2. Use only the electrical voltage and frequency speciﬁed on model plate. The electrical con nections and grounding of the heater shall fol low the National Electric Code, ANSI/NFPA 70 or the Canadian Electrical Code, Part 1.

3. 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 recep tacle or extension cord.

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

5. Use only a three-prong, grounded extension cord.

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

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

8. Provide adequate ventilation. Before using heater, provide at least a 1 (1400 cm2) opening of fresh, outside air.

9. For indoor use only. Do not use heater out doors.

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

11. 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.

12. Keep appliance area clear and free from com bustible materials, gasoline, paint thinner, and other ﬂammable vapors and liquids.

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

/2 square-foot

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SAFETY INFORMATION

Air For Combustion

Air For Heating

Continued

14.

Minimum heater clearances from combustibles: Outlet: 6 Ft. (1.83 m) Sides: 2 Ft. (0.61 m) Top: 6 Ft. (1.83 m) Rear: 2 Ft. (0.61 m)

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

16. Keep propane tank(s) below 100° F (37.8° C).

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

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

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

20. Not intended for use on ﬁnished ﬂoors.

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

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

23. Do not leave heater unattended.

24. Keep children and animals away from heater.

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

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

27. Never attach duct work to front or rear of heater.

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

29. Do not use heater if altered.

30. Turn off propane supply and unplug heater when not in use.

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

PRODUCT

IDENTIFICATION

Hot Air Outlet (Front)

Outer Shell

Handle

Piezo Ignitor Button

Automatic Control Valve Button

Hose/ Regulator Assembly

Figure 1 - 30,000 Btu/Hr Model Shown

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.

Clean Heated Air Out (Front)

Fan

Motor

Power Cord

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.

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Cool Air In (Back)

Combustion Chamber

Air For Combustion

Air For Heating

Hose/Regulator Assembly

Figure 2 - Cross Section Operational View

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 (see Figure 3). Make sure rear screw goes through shell and into fan guard. Tighten screws ﬁrmly.

Remove Screw

Figure 3 - Removing Screw from Top of

Flat Side Facing Up

Fan Guard

Nut Clip

Shell

Slot

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 (9 kg) propane tank. You may need two or more tanks or one larger tank in colder weather. Use a 100-pound (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. The minimum surrounding air temperature rating for each heater is -20°F (-29°C).

Average Temp °F (°C) No. Of Tanks

At Tank Location 100-pound (45 kg)

40°(4°) 1 32°(0°) 1 20°(-7°) 1 10°(-12°) 1 0°(-18°) 1

-10°(-23°) 2

-20°(-29°) 2

Figure 4 - Installing Nut Clip

Nut Clip

Figure 5 - Attaching Handle

Screws

Handle

Rear of Heater

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INSTALLATION

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.

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 4).

2. Connect POL ﬁtting on hose/regulator as sembly to propane tank(s). Turn POL ﬁtting counterclockwise into threads on tank. Tighten ﬁrmly using wrench. IMPORTANT: Position regulator so that hose leaving the regulator is in a horizontal position (see Figure 6). This places the regulator vent in the proper position to protect it from the weather.

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

IMPORTANT: Use extra hose or piping 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. 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 hap pens, reset the excess-ﬂow check valve by closing propane supply valve and open again slowly.

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

6. Close propane supply valve.

Note: If not opened slowly,

Propane Supply Valve

Propane Tank

Figure 6 - Regulator Position

Inlet Connector

Figure 7 - Hose and Inlet Connector

POL Fitting

VENTILATION

WARNING: Provide at least

a 1

square foot (1400 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 ventila tion before running heater.

Hose

Regulator

Hose

)

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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 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 ft (15.24 m) long, use 18 AWG

rated cord.

• 51 to 100 ft (15.54 to 30.48 m) long, use

16 AWG rated cord.

• 101 to 200 ft (30.78 to 60.96 m) 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. 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.

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 not opened slowly,

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.

NOTICE: If heater is unplugged or power outage occurs while heater is running, the thermal limit device will stop fuel ﬂow. A few seconds occur before the thermal limit device activates. During this short time, ﬂames may appear outside the heater. This is normal. The ﬂames will go out when thermal limit device activates.

Piezo Ignitor Button

Automatic Control Valve Button

Figure 8 - Automatic Control Valve

Button and Piezo Ignitor Button

TO STOP HEATER

1. Tightly close propane supply valve on propane tank(s).

2. Wait a few seconds. Heater will burn gas left in supply hose.

3. Unplug heater.

TO RESTART HEATER

1. Wait ﬁve minutes after stopping heater.

2. Repeat steps under To Start Heater

, page 5.

STORAGE

CAUTION: Disconnect heater

from propane supply tank(s).

1. Store propane tank(s) in safe manner. See Chapter 5 of Standard for Storage and Han

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

propane tanks outdoors.

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STORAGE

Continued

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

3. Store in dry, clean, and safe place. Do not store hose/regulator assembly inside heater combustion chamber.

4. When taking heater out of storage, always check inside of heater. Insects and small animals may place foreign objects in heater. Remove motor and other internal parts if needed to remove foreign objects (see Service

Procedures

MAINTENANCE

WARNINGS

• Never service heater while it is plugged in, connected to propane supply, operating, or hot. Severe burns and electri cal shock can occur.

• Keep heater clear and free from combustible materials, gasoline, and other ﬂammable vapors and liquids.

• Do not block the ﬂow of combustion or ventilation air.

1. Keep heater clean. Clean heater annually or as needed to remove dust and debris. If heater is dirty or dusty, clean heater with a damp cloth. Use household cleaners on difﬁcult spots.

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. Correct all leaks at once.

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

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

5. Keep inside of heater free from combustible and foreign objects. Remove motor and other internal parts if needed to clean inside of heater (see Service Procedures).

6. Clean fan blades each season or as needed (see Fan, page 8).

SERVICE PROCEDURES

WARNING: Never service heater while it is plugged in, connected to propane supply, operating, or hot. Severe burns and electrical shock can occur.

ELECTRICAL SYSTEM

The entire electrical system for this heater is contained within the motor. If any part of the electrical system is damaged, you must replace motor.

MOTOR

1. Remove three screws that attach fan guard to heater shell.

2. Remove motor and fan guard from heater shell (see Figure 9).

3. Use hex wrench to loosen set screw which holds fan to motor shaft (see Figure 10). Re move fan. Be careful not to damage the fan blade pitch.

4. Remove two nuts and two screws that attach fan guard to motor using nut-driver. Remove fan guard from motor (see Figure 11, page 8).

Screw

Figure 9 - Removing Motor and Fan

Guard from Heater

Motor and Fan Guard

Setscrew

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Figure 10 - Setscrew Location

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SERVICE PROCEDURES

Continued

5 Disconnect the green power cord wire from

motor and remove black and white wire ter minals.

6. Discard old motor.

7. Attach green power cord wire to motor.

8. Attach fan guard to new motor with two nuts and two screws.

9. Replace black and white terminals.

10. Place fan onto motor shaft of new motor. Make sure set screw contacts ﬂat surface on motor shaft. Tighten set screw ﬁrmly (40-50 inchpounds [46.08-57.60 kilogram-centimeters]).

11. Place motor and fan guard into rear of heater shell. Make sure power cord is properly lo cated (see Figure 12).

12. Insert three screws through heater shell and into fan guard (see Figure 12). Tighten screws ﬁrmly.

Fan Guard

Nut

Motor

Figure 11 - Removing or Attaching Fan

Guard from Motor

Screw

FAN

1. Remove three screws that attach fan guard to heater shell.

2. Remove motor and fan guard from heater shell

(see Figure 9, page 7).

3. Use hex wrench to loosen set screw that holds fan to motor shaft (see Figure 10, page 7).

4. Remove fan. Be careful not to damage the fan blade pitch.

5a. If replacing fan, remove old fan and discard.

Go to step 7 below.

5b. If cleaning fan, use soft cloth moistened with

kerosene or solvent.

6. Dry fan thoroughly.

7. Place fan onto motor shaft. Make sure set screw contacts ﬂat surface on motor shaft.

Tighten set screw ﬁrmly (40-50 inch-pounds [46.08-57.60 kilogram-centimeters]).

8. Place motor and fan guard into rear of heater shell. Make sure power cord is properly lo cated (see Figure 12).

9. Insert three screws through heater shell and into fan guard. Tighten screws ﬁrmly.

IGNITOR

1. Remove motor and fan guard from heater (see Motor, page 7, steps 1 and 2).

2. Remove black ignitor wire from piezo ignitor. Access ignitor wire through underside of heater base (see Figure 13). Push wire up through notch in ﬁller panel.

3. Remove ignitor mounting screw from rear head using nut-driver or standard screwdriver (see Figure 14).

Screw

Figure 12 - Replacing Motor and Fan

Guard Into Heater

Motor and Fan Guard

Piezo Ignitor

Ignitor Wire

Figure 13 - Removing Ignitor Wire from

Ignitor

Figure 14 - Removing Ignitor Mounting

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Underside of Heater

Piezo Ignitor

Mounting Screw

Screw and Ignitor

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SERVICE PROCEDURES

Continued

4. Remove ignitor from rear head.

5. Install new ignitor. Attach ignitor to rear head with ignitor mounting screw.

6. Run ignitor wire from new ignitor through notch in ﬁller panel. Attach ignitor wire to piezo ignitor.

7. Set gap between ignitor electrode and target plate to .17" (43.18 cm) (see Figure 15).

WARNING: Make sure heater

8. Test for spark. Push piezo ignitor button and watch for spark between ignitor electrode and target plate.

9. Place motor and fan guard into rear of heater shell (see Motor, page 7, steps 9 and 10).

Ignitor Electrode

Gap Area

is disconnected from propane supply. Heater could ignite causing severe burns.

Figure 15 - Clearance Between Ignitor

Electrode and Target Plate

SPECIFICATIONS

Output Rating (BTU/Hr) 30,000 35,000 40,000 Fuel Propane Vapor Only Propane Vapor Only Propane Vapor Only Fuel Consumption Gallons (liters)/Hour .33 (1.25) .38 (1.44) .44 (1.65) Pounds (kg)/Hour 1.4 (0.63) 1.62 (0.74) 1.86 (0.84) Supply Pressure To Regulator Minimum (for purposes 20 psi 20 psi 20 psi of input adjustment) Maximum Regulator Outlet Pressure 10 PSI 10 PSI 10 PSI Manifold Pressure 10.1 PSI 9.7 PSI 9.7 PSI

Tank Pressure or 200 psi Tank Pressure or 200 psi Tank Pressure or 200 psi

(Remainder of list applies to all models) Hot Air Output (CFM Approx) 175 Motor 3045 RPM, 1/40 HP Electric Input 120 volt/60 hertz Amperage .6 Ignition Manual, Piezo Temperature Range for Heater Operation -20° F to 85° F * (-29° C to 29.4° C)* Weight Heater 11 lbs. (4.98 kg) Shipping 13 lbs. (5.89 kg) Size - L x W x H Carton 19.4" x 9.75" x 14.75" (49.27 x 24.76 x 37.46 cm) Heater 18.5" x 7.7" x 12.8" (46.99 x 19.55 x 32.51 cm) * When running heater in temperatures above 85° F (29.44° C), high internal temperatures may cause

thermal limit device to shut down heater.

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