Desa RLP100 User Manual

PROPANE CONSTRUCTION FORCED AIR HEATER

OWNER’S MANUAL

RM100LP,

RLP100

VARIABLE 65,000, 85,000 AND 100,000 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 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

Product Identiﬁcation ...........................................

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

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

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

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

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

Operation ............................................................. 5

Maintenance ........................................................ 6

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

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Troubleshooting ................................................... 7

Service Procedures ............................................. 8

Wiring Diagram ...................................................11

Speciﬁcations

technical Service ............................................... 13

Replacement Parts ............................................ 13

Accessories ....................................................... 13

Illustrated Parts Breakdown and Parts List ....... 14

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

................................................... 12

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 GASO LINE, SOLVENTS, PAINT THINNER, DUST PARTICLES OR UNKNOWN CHEMICALS.

WAR NING: 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 re semble 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.

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Propane Gas: Propane gas is odorless. An odormaking 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.

• 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 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 connec tions 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 threeprong receptacle or extension cord.

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

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

• Use only propane ga s set up for vapo r withdrawal.

• Provide adequate ventilation. Before using heater, provide at least a three-square-foot (91 cm) 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 basement or below ground level. Propane gas is heavier than air. If a leak occurs, propane gas will sink to the lowest pos sible level.

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

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

• Minimum heater clearances from combustible materials:

Outlet: 8 Ft. (2.44 m) Sides: 2 Ft. (60.96 cm)

Top: 6 Ft. (1.83 m) Rear: 2 Ft. (60.96 cm)

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

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SAFETY INFORMATION

Air For Combustion

And Heating

Fuel

Continued

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

• 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.

• Do not leave heater unattended.

• Keep children and animals away from heater.

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

• To prevent injury, wear gloves when han dling heater.

• Never attach duct work to heater.

• Do not alter heater. Keep heater in its origi nal state.

• Do not use heater if altered.

• Turn off propane supply to 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)

Handle

Fan Guard

Motor Mount

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.

THEORY OF OPERATION

The Fuel System: The hose/regulator assembly

attaches to the propane gas supply. The propane gas moves through the automatic control 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 spark transformer

and ignitor lights the main burner.

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

Note: Some parts are located differently on some

models.

Cord

Power

(Back)

Air In

Cool

Fan

Nozzle

Chamber

Combustion

Assembly

Hose/Regulator

Control Knob

Inlet Connector

Hose /Regulator Assembly

Figure 1 - 100,000 Btu/Hr Model

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Power Cord

Figure 2 - Cross Section Operational View

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Heated

Clean

(Front)

Air Out

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 the Propane Installation Code CAN/CGA B149.2. Your local

library or ﬁre department will have this booklet. The amount of propane gas ready for use from pro

pane 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

(45 kg) tanks needed to run this heater. Temperature [°F (°C)] Number of tanks,

at Tank 100,000 Btu/Hr

32°F (0°C) 2 20°F (-6.7°C) 2 10°F (-12.2°C) 3 0°F (-17.8°C) 3

-10°F (-23.3°C) (Use larger tank)

-20°F (-28.9°C) (Use larger tank) Less gas is vaporized at lower temperatures. You

may need two or more 100 pound (45 kg) 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 tem perature rating for each heater is -20°F (-29°C).

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.

2. Connect fuel gas connector ﬁtting on hose/regulator assembly to propane tank(s). Turn counter clockwise into threads on tank valve. Tighten ﬁrmly using wrench. IMPORTANT: Tighten regulator with vent pointing down. Pointing vent down protects regulator from weather damage.

3. Connect hose to inlet connector. Tighten 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)

5. Check all connections for leaks.

6. Close propane supply valve.

Supply Valve

Propane Tank

Note: If not opened slowly, excess-

slowly. ﬂow check valve on propane tank will stop gas ﬂow. If this happens, close propane supply valve and open again slowly.

Hose

Regulator

Vent (pointing down)

Fuel Gas Connector

Figure 3 - Regulator With Vent

Pointing Down

100,000 Btu/Hr Model Shown

WARNING: Test all gas piping and connections for leaks after installing or servicing. Never use an open ﬂame to check for a leak. Apply a mix

ture 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 above).

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Inlet Connector

Figure 4 - Hose and Inlet Connector

Hose

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VENTILATION

WARNING: Follow the minimum fresh, outside air ventilation requirements. If proper fresh, outside air ventilation is not provided, carbon monoxide poisoning can occur. Provide proper fresh, outside air ventilation before running heater.

Provide a fresh air opening of at least three square feet for each 100,000 Btu/Hr rating. Provide extra fresh air if more heaters are being used.

OPERATION

WARNING: Review and understand the warnings in the Safety Information section, page

2. They are needed to safely op erate 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. Make sure the control knob is in the OFF position.

4. Plug power cord of heater into a three-prong, grounded extension cord. Extension cord must be at least six feet (1.83 m) long, UL/CSA listed and of a proper size.

Extension Cord Size Requirement Up to 100 feet (30.48 m) long, use 16 AWG

rated cord.

101 to 200 feet (30.78 to 6.96 m) long, use 14

AWG rated cord.

5. 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.

6. 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.

7. Press and hold in control knob. Turn counter clockwise to the LOW position. Heater should ignite within a few seconds.

Note: If heater fails to ignite, hose may have

air in it. If so, keep control knob pressed and wait 20 seconds. Release automatic control valve button and wait 20 seconds for unburned fuel to exit heater. Repeat step 7.

8. After heater ignites, wait 30 seconds. This ac tivates the automatic control system. Release the control knob.

9. When burner remains lit, set heater at the desired heat level by turning the control valve counterclockwise. If burner goes out, turn off gas. Turn control knob fully clockwise to the lowest position. Check fuel supply. If adequate fuel is available, restart heater beginning at step 1.

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 hoses.

3. Turn control knob to the OFF position.

4. Unplug heater.

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STORAGE

MAINTENANCE

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 and the Propane Installation Code CAN/CGA B149.2. Follow all local codes.

Always store propane tanks outdoors.

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. Keep inside of heater free from combustible and foreign objects.

WARNINGS

• Never service heater while it is plugged in, connected to propane supply, operating or

hot. Severe burns and electrical 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, page 8).

6. Clean fan blades each season or as needed (see Fan, page 9).

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TROUBLESHOOTING

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

OBSERVED FAULT

Fan does not turn when heater is plugged in

POSSIBLE CAUSE

1. No electrical power to heater

2. Fan hitting inside of heater shell

3. Fan blades bent

4. Defective motor

REMEDY

1. Check voltage to electrical outlet. If voltage is good, check heater power cord for breaks

2. Adjust motor/fan mount to keep fan from hitting inside of heater shell. Bend fan mount if necessary

3. Replace fan. See Fan, page 9

4. Replace motor. See Motor, page 8

Heater will not ignite

Heater shuts down while running

1. User did not follow installation or operation instructions properly

2. No spark at ignitor. To test for spark, follow step 8 under Ig- nitor, page 10. If you see spark at ignitor, have heater serviced by qualiﬁed service person. If no spark seen:

A) Loose or disconnected

ignitor wire

B) Wrong spark gap C) Bad ignitor electrode D) Bad spark transformer

1. Propane supply may be inadequate

2. High surrounding air temperature causing thermal limit device to shut down heater.

3. Restricted air ﬂow

4. Damaged fan

5. Excessive dust or debris in surrounding area

1. Repeat installation and operation instructions. See Installation, page 4 and Operation, page 5

2. A) Check ignitor wire. Tighten or reattach loose ignitor wire. See Figure 10, page 9 for ignitor wire location

B) Set gap between ignitor electrode and

target plate to .13"/.15" (

C) Replace ignitor electrode. See

Ignitor, page 10

D) Replace spark transformer. See

Spark Transformer, page 9

1. A) Reﬁll tank

B) Provide additional and/or larger

tanks. See Propane Supply, page 4

2. This can happen when running heater in temperatures above 85°F. Run heater in cooler temperatures

3. Check heater inlet and outlet. Remove any obstructions

4. Replace fan. See Fan, page 8

5. Clean heater. See Mainte na nc e, page 5

3.3 a 3.8 mm)

WARNING: Use only in areas free of high dust content.

Heater producing odor

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1. Gas leak

Heater operating on a 20lb. propane/LP cylinder. Insufficient propane/LP gas will be supplied by a 20lb. cylinder resulting in odor

3. Propane/LP supply tank is "freezing up". Evaporation and consumptioin rate of propane from supply tank is to great for the size of the tank and air temperature

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1, Check all connections for leaks. Ap-

ply mixture of liquid soap and water to gas joints. Bubbles forming show a leak that must be corrected

2. To obtain correct mixture of propane/ LP gas and air, use a larger cylinder size, i.e. 40 lb.(minimum) or 100 lb. See Propane Supply, page 4

3. A) Use a larger supply cylinder size, i.e. 40 lb. (minimum) or 100 lb.

B) Reduce consumption rate by op-

erating the heater at "LOW" setting temorarily until frost disappears from the tank

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.

MOTOR

1. With heater on its side, remove base tray.

2. Access ground screw through underside of heater base. Remove ground screw. Disconnect the green motor wire and the green power cord wire from underside of shell (see Figure 5).

3. Remove black and white motor wires from terminal board (see Figure 5).

4. Carefully push motor wires through hole in bottom of shell.

5. Remove screws holding motor mount to shell. Use nut-driver (see Figure 6).

6. Carefully pull motor and fan out of shell. IMPORTANT: Be careful not to damage fan. Do not set motor and fan down with the weight resting on fan. This could damage fan pitch.

7. Use hex wrench to loosen setscrew which holds fan to motor shaft.

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

9. Use nut driver to remove two nuts that attach motor to motor mount.

10. Discard old motor.

11. Attach motor to motor mount with two nuts. Tighten nuts ﬁrmly.

12. Replace fan on motor shaft. Make sure set screw contacts ﬂat surface on motor shaft.

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

14. Carefully route motor wires through hole in shell (see Figure 7). Place motor, motor mount and fan guard into rear of heater shell.

15. Insert screws through heater shell and into motor mount. Tighten screws ﬁrmly.

16. Turn heater on its side to access opening in bottom of base. Connect green wires from motor, transformer and power cord to heater shell using ground nut (see Figure 5).

17. Attach black and white wires to terminal board (see Wiring Diagram, page 11, for correct locations) .

18. Replace base tray.

Motor Mount Screw

Fan Guard

Motor Mount

Hole in Shell for Wires

Figure 6 - Removing Motor, Motor Mount

and Fan Guard from Heater

Hole in Shell for Wires

Transformer

Ground Screw

Motor Green Lead

Figure 5 - Location of Ground Screw

Green Lead

Power

Figure 7 - Replacing Motor, Motor Mount

Cord Green Lead

Terminal Board

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and Fan Guard into Heater

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SERVICE PROCEDURES

Continued

FAN

1 Remove motor, motor mount and fan (see

Motor, steps 1 through 8, page 8).

2. Clean fan using soft cloth moistened with kerosene or solvent.

3. Dry fan thoroughly.

4. Replace fan on motor shaft. Make sure set screw is touching back of ﬂat surface on motor shaft (see Figure 8).

5. Place setscrew on ﬂat of shaft. Tighten set screw ﬁrmly (40-50 inch-pounds [46.08-57.60 kilogram-centimeters]).

6. Place motor, motor mount and fan guard into rear of heater shell (see through 18, page 8).

Fan

Motor Shaft

Motor, steps 14

Setscrew

SPARK TRANSFORMER

1. Remove base tray.

2. Locate and disconnect white, black and orange wires from spark transformer.

3. Remove two screws holding spark trans former to base. Remove sheet metal nuts on transformer and install on new transformer. Discard spark transformer.

4. Install new spark transformer. Position new

spark transformer in same manner as old transformer.

5. Connect white, black and orange wires to new

spark transformer. Connect wires to correct terminals as noted in step 2.

6. Replace base tray.

Ignitor Wire

Bushing

Figure 8 - Fan, Motor Shaft and Setscrew

Hub

Figure 9 - Fan Cross Section

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Location

Fan

Motor Shaft

Setscrew

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Figure 10 - Removing Ignitor Wire from

Spark Transformer

SERVICE PROCEDURES

Continued

IGNITOR

1. Remove motor, motor mount and fan guard (see Motor, page 8, steps 1 through 6) .

2. Remove orange ignitor wire from ignitor.

3. Remove ignitor mounting screw from rear head using nut-driver or standard screwdriver (see Figure 11).

4. Remove ignitor from rear head.

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

6. Attach ignitor wire.

7. Check gap between ignitor electrode and nozzle to .13"/.15" (3.3/3.8 mm) (see Fig ure 12).

8. Test for spark.

WARNING: Make sure heater is disconnected from propane supply. Heater could ignite causing severe burns.

Plug into extension cord and watch for spark

between ignitor electrode and nozzle.

9. Place motor, motor mount and fan guard into rear of heater shell (see 14 through 18).

Motor, page 8, steps

Ignitor

Ignitor Mounting Screw

Figure 11 - Removing Ignitor Mounting

Burner Nozzle

Screw and Ignitor

Ignitor Electrode

Rear Head

Gap Area

Figure 12 - Clearance between Ignitor

Electrode and Target Plate

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+ 22 hidden pages