Owner's Manual

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PROPANE CONSTRUCTION FORCED AIR HEATER

OWNER’S MANUAL

VARIABLE 30-55,000, 50-85,000 AND 75-125,000 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 in-

structions should use or service this heater.

If you need assistance or heater information such as an in-

structions manual, labels, etc. Contact the manufacturer.

Save this manual for future reference.

For more information, visit www.desatech.com

TABLE OF CONTENTS

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

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

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

Theory of Operation ............................................ 4

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

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

Ventilation ............................................................ 5

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

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

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

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

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

Speciﬁcations .................................................... 10

Wiring Diagram .................................................. 10

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

Technical Service ...............................................11

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

Warranty and Repair Service ............................ 18

Summary of content (18 pages)

PAGE 1
PROPANE CONSTRUCTION FORCED AIR HEATER OWNER’S MANUAL VARIABLE 30-55,000, 50-85,000 AND 75-125,000 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.
PAGE 2
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.
PAGE 3
SAFETY INFORMATION PRODUCT IDENTIFICATION Continued 12. Keep heater at least six feet from propane tank(s). Do not point heater at propane tank(s) within 20 feet (6.1 m). 13. Keep propane tank(s) below 100° F (37.8° C). 14. Check heater for damage before each use. Do not use a damaged heater. 15. Check hose before each use of heater. If highly worn or cut, replace with hose speciﬁed by manufacturer before using heater. 16. Locate heater on stable and level surface if heater is hot or operating. 17.
PAGE 4
THEORY OF OPERATION The Fuel System: The hose/regulator assembly The Ignition System: The spark transformer and spark plug 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. 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.
PAGE 5
VENTILATION INSTALLATION Continued 1. Provide propane supply system (see Propane Supply, page 4). 2. Connect fuel gas connector fitting on hose/regulator assembly to propane tank(s). Turn counterclockwise 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.
PAGE 6
OPERATION MAINTENANCE Continued 6. Press and hold in fuel valve button. Heater should ignite within a few seconds. Note: If heater fails to ignite, hose may have air in it. If so, keep fuel valve button pressed and wait 20 seconds. Release automatic control valve button and wait 20 seconds for unburned fuel to exit heater. Repeat step 7. 7. After heater ignites, wait 30 seconds. This activates the automatic control system. Release the control knob. 8.
PAGE 7
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 PROBLEM POSSIBLE CAUSE REMEDY Fan does not turn when heater is plugged in 1. No electrical power to heater 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.
PAGE 8
SERVICE PROCEDURES Motor and Fan Guard WARNING: Never service heater while it is plugged in, connected to propane supply, operating or hot. Severe burns and electrical shock can occur. Screw MOTOR 1. With heater on its side, remove access panel. 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 two black wires from motor to terminal board. 4.
PAGE 9
SERVICE PROCEDURES Continued SPARK TRANSFORMER 1. Remove access panel. 2. Locate and disconnect white, black and orange wires from spark transformer. 3. Remove screw holding spark transformer to base. Remove sheet metal nut 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.
PAGE 10
SPECIFICATIONS All Models • Propane/LP Gas • Gas Supply Pressure to Regulator Max - Bottle Pressure, Min - 5 psig (34.5 kPa) • Gas Supply Pressure Regulator Out 28" WC (6.97 kPa) • Electrical Input - 115V, 60 Hz, 1Ø, 3a • Direct Spark Ignition • Primary Flame Control Thermocouple operated gas valve • Minimum Ambient Temp. Rating 0° F (-17.8° C) • Heated Air Output - 350 CFM (9.91 m3/min) 55,000 Btu/Hr Models • 30-55,000 Btu/Hr (8.8 - 16.1 kW) • Fuel Consumption 1.4 - 2.6 pounds/hr (0.70 - 1.
PAGE 11
REPLACEMENT PARTS WARNING: 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. This will also protect your warranty coverage for parts replaced under warranty. TECHNICAL SERVICE You may have further questions about this heater. If so, contact DESA Heating Productsʼ Technical Service Department at 1-866-672-6040.
PAGE 12
ILLUSTRATED PARTS BREAKDOWN MODELS 55-F, BLP55V, REM55PV, RLP55V AND SPC-55 5 18 7 6 17 15 10 9 8 4 16 13 14 11 14 12 19 3 1 2 23 26 21 25 22 24 20 27 28 32 29 33 30 34 12 35 36 31 www.desatech.
PAGE 13
PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 11 of this manual. MODELS 55-F, BLP55V, REM55PV, RLP55V AND SPC-55 KEY NO. PART NO.
PAGE 14
ILLUSTRATED PARTS BREAKDOWN MODELS 85-FAC, BLP85V, REM85PV, RLP85V AND SPC-85 1 31 6 32 13 35 20 9 10 7 12 12 2 5 8 14 11 3 4 15 16 33 25 19 21 18 17 24 26 27 22 30 14 29 36 34 23 28 www.desatech.
PAGE 15
PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 11 of this manual. MODELS 85-FAC, BLP85V, REM85PV, RLP85V AND SPC-85 KEY NO. PART NO.
PAGE 16
ILLUSTRATED PARTS BREAKDOWN MODELS 125-F, BLP125V, REM125PV, RLP125V AND SPC-125 4 6 13 5 12 10 11 9 16 14 3 15 7 8 2 1 14 29 21 28 22 30 25 40 35 16 37 23 17 24 27 33 36 19 20 31 34 18 32 25 26 39 38 www.desatech.
PAGE 17
PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 11 of this manual. MODELS 125-F, BLP125V, REM125PV, RLP125V AND SPC-125 KEY NO. PART NO.
PAGE 18
WARRANTY AND REPAIR SERVICE KEEP THIS WARRANTY Model Serial No. Date of Purchase LIMITED WARRANTIES FOR NEW AND FACTORY RECONDITIONED PRODUCTS New Products: DESA Heating Products warrants this heater and any parts thereof, to be free of defects in materials and workmanship for one (1) year from the date of ﬁrst purchase, when operated and maintained in accordance with the manufacturer's instructions. These warranties are extended only to the original retail purchaser, when proof of purchase is provided.