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PROPANE/LP
TM CONSTRUCTION HEATER
OWNER’S MANUAL
For more information, visit www.desatech.com
For more information, visit www.desatech.com
Heater Size: 375,000 Btu/Hr - AT Series
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 BOD
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TABLE OF CONTENTS 2 SAFETY INFORMATION TABLE OF CONTENTS SAFETY INFORMATION ............................................................ 2 SERVICE PROCEDURE ............................................................ 6 UNPACKING ............................................................................... 3 WIRING DIAGRAMS................................................................... 8 PRODUCT IDENTIFICATION ..................................................... 3 SPECIFICATIONS .........
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SAFETY INFORMATION 3 PRODUCT IDENTIFICATION 3 UNPACKING SAFETY INFORMATION PRODUCT IDENTIFICATION Continued Hot Air Outlet (Front) • Do not use heater in living or sleeping quarters. • Keep appliance area clear and free from combustible materi- als, gasoline, paint thinner, and other flammable vapors and Handle liquids. Dust is combustible. Do not use heater in areas with high dust content. • This heater is equipped with a thermostat. Heater may start at Fan anytime. Guard • Check heater for dam
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THEORY OF OPERATION 4 PROPANE/LP SUPPLY VENTILATION INSTALLATION The chart below shows the number of 100-pound tanks needed to THEORY OF OPERATION run this heater. The Fuel System: The hose/regulator assembly attaches to the Do not operate this product with any tank smaller than 100 pounds. propane gas supply. The propane gas moves through the solenoid valve and out the nozzle. Temperature (°F) At Tank The Air System: The motor turns the fan. The fan pushes air into and 40° 32° 20° 0° -10° -20°
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S A E R C N 5 10 15 20 I INSTALLATION 5 OPERATION 5 To Start Heater To Stop Heater INSTALLATION OPERATION Continued WARNING: Review and understand the warnings 4. Open propane/LP supply valve on propane/LP tank(s) slowly. in the Safety Information section, page 2. They are Note: If not opened slowly, excess-flow check valve on pro- needed to safely operate this heater. Follow all local pane/LP tank will stop gas flow. If this happens, you may hear codes when using this heater. a click inside th
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OPERATION 6 To Restart Heater STORAGE MAINTENANCE SERVICE PROCEDURE Cleaning Fan OPERATION SERVICE PROCEDURE Continued WARNING: Never service heater while it is plugged TO RESTART HEATER in, connected to propane supply, operating, or hot. Severe burns and electrical shock can occur. If safety control stops gas flow to heater, motor will continue to run. To restart heater: CLEANING FAN 1. Turn on/off switch to the OFF position. Clean fan every 500 hours of operation or as needed. 2. Wait ten sec
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SERVICE PROCEDURE 7 Cleaning Fan (Cont.) 7 SERVICE PROCEDURE Continued 8. Turn motor and fan around. Place motor and fan into shell backwards. Note: Motor will go into shell first (see Figure 8). Rear Mounting 9. Line up rear mounting holes in shell with first hole on each Hole side of motor mount (see Figure 8). Note: When holes are lined up, fan should be outside of shell. 10. Holding mounting bolt, carefully reach through fan blades into First rear of heater. Be careful not to damage fan pitc
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WIRING DIAGRAMS 8 SPECIFICATIONS WIRING DIAGRAMS Solenoid Green Valve Motor Ignitor Orange Power Cord Green Orange White White Blue White Black DSI Black Black T Control Black On/Off Blue Blue Blue Blue T Switch Terminal Board Connector Connector Thermal Green Switch Figure 11 - Wiring Diagram Ignitor Black Solenoid Valve Orange Orange Green Blue Black Direct Spark White Ignitor Green Blue Thermal Switch Blue White Centrifugal Switch Black White Motor T T Green Green Line Neutral
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ACCESSORIES 9 TECHNICAL SERVICE 9 SERVICE PUBLICATIONS REPLACEMENT PARTS ACCESSORIES REPLACEMENT PARTS Purchase accessories and parts from your nearest dealer or service WARNING: Use only original replacement parts. center. If your dealer or service center can not supply an accessory This heater must use design-specific parts. Do not or part, either contact your nearest Parts Central (listed in the substitute or use generic parts. Improper replace- separate Authorized Service Center booklet) or
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ILLUSTRATED PARTS BREAKDOWN 10 ILLUSTRATED PARTS BREAKDOWN BLP375AT 2 SBLP375AT 21 5 6 1 27 8 4 9 33 18 11 3 10 31 26 17 22 30 29 25 32 23 16 24 19 12 15 14 13 20 7 Note: Screws are standard hardware items For more information, visit www.desatech.com For more information, visit www.desatech.com 103018
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PARTS LIST 11 11 This list contains replaceable parts used in your heater. When ordering parts, follow the instructions PARTS LIST listed under Replacement Parts on page 9 of this manual. BLP375AT SBLP375AT KEY PART NO. NUMBER DESCRIPTION QTY. 1 097844-02 Outer Shell Assembly (BLP375AT) 1 097844-04 Outer Shell Assembly (SBLP375AT) 1 2 097847-01 Combustion Chamber Assembly 1 3 097849-01 Burner Assembly 1 4 097805-01 Ignitor 1 5 097918-01 Cleat 2 6 097917-01 Handle 1 7 097806-02 Ignitor Cable 1 8
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12 WARRANTY AND REPAIR SERVICE KEEP THIS WARRANTY Model Serial No. Date of Purchase LIMITED WARRANTY DESA International warrants this product and any parts thereof, to be free from defects in materials and workmanship for one (1) year from the date of first purchase when operated and maintained in accordance with instructions. This warranty is extended only to the original retail purchaser, when proof of purchase is provided. This warranty covers only the cost of parts and labor required to rest
