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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 BODILY INJURY AND PROPERTY LOSS OR
DAMAGE FROM HAZARDS OF FIRE, EXPLOSION, BURN, ASPHYXIATION, CARBON MONOX-
IDE 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.
TM
Save this manual for future reference.
Save this manual for future reference.
PROPANE/LP
CONSTRUCTION HEATER
OWNER'S MANUAL
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Summary of Contents for Desa AT Series
- Page 1 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.
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Page 2: Table Of Contents
TABLE OF CONTENTS SAFETY INFORMATION TABLE OF CONTENTS SAFETY INFORMATION ... 2 UNPACKING ... 3 PRODUCT IDENTIFICATION ... 3 THEORY OF OPERATION ... 4 PROPANE/LP SUPPLY ... 4 VENTILATION ... 4 INSTALLATION ... 4 OPERATION ... 5 STORAGE ... 6 MAINTENANCE ... -
Page 3: Safety Information
SAFETY INFORMATION Continued • 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 liquids. Dust is combustible. Do not use heater in areas with high dust content. -
Page 4: Theory Of Operation
THEORY OF OPERATION PROPANE/LP SUPPLY VENTILATION INSTALLATION THEORY OF OPERATION The Fuel System: The hose/regulator assembly attaches to the propane gas supply. The propane gas moves through the solenoid valve and out the nozzle. The motor turns the fan. The fan pushes air into and The Air System: around the combustion chamber. -
Page 5: Operation
INSTALLATION Continued Open propane/LP supply valve on propane/LP tank(s) slowly. Note: If not opened slowly, excess-flow check valve on pro- pane/LP tank will stop gas flow. If this happens, you may hear a click inside the regulator assembly. To reset the excess flow check valve, close propane/LP supply valve and open again slowly. -
Page 6: Storage
OPERATION To Restart Heater STORAGE MAINTENANCE SERVICE PROCEDURE Cleaning Fan OPERATION Continued TO RESTART HEATER If safety control stops gas flow to heater, motor will continue to run. To restart heater: Turn on/off switch to the OFF position. Wait ten seconds, then turn on/off switch to the ON position. If heater does not restart •... - Page 7 SERVICE PROCEDURE Continued Turn motor and fan around. Place motor and fan into shell backwards. Note: Motor will go into shell first (see Figure 8). Line up rear mounting holes in shell with first hole on each side of motor mount (see Figure 8). Note: When holes are lined up, fan should be outside of shell.
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Page 8: Wiring Diagrams
WIRING DIAGRAMS SPECIFICATIONS WIRING DIAGRAMS Solenoid Valve Ignitor Orange Blue White Control Black Blue Blue Connector Thermal Green Switch Figure 11 - Wiring Diagram Ignitor Black Orange Green Black Direct Spark Ignitor Green Blue Thermal Switch Blue Centrifugal Switch Black Motor Green Green... -
Page 9: Accessories
Fuel Gas Connector: LPA4020 A POL adapter with excess-flow check valve. Thermostat: HA1210 TECHNICAL SERVICE You may have further questions about this heater. If so, contact DESA International’s Technical Service Department at 1-866-672-6040 or visit our website at www.desatech.com. SERVICE PUBLICATIONS You can receive an Illustrated Parts List free of charge. -
Page 10: Illustrated Parts Breakdown And Parts List
ILLUSTRATED PARTS BREAKDOWN ILLUSTRATED PARTS BREAKDOWN BLP375AT SBLP375AT Note: Screws are standard hardware items For more information, visit www.desatech.com For more information, visit www.desatech.com 103018... -
Page 11: Parts List
PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 9 of this manual. BLP375AT SBLP375AT * No Longer Available For more information, visit www.desatech.com For more information, visit www.desatech.com 103018 PART NUMBER... -
Page 12: Warranty And Repair Service
WARRANTY AND REPAIR SERVICE 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.
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