Product Identification; Unpacking; Theory Of Operation - Desa BLP375AT Owner's Manual

SAFETY INFORMATION
Continued
• Never attach duct work to front or rear of heater.
• Use only original replacement parts. This heater must use de-
sign-specific parts. Do not substitute or use generic parts. Im-
proper replacement parts could cause serious or fatal injuries.
• Do not adjust regulator below 7 psig or above 20 psig.

PRODUCT IDENTIFICATION

Hot Air Outlet (Front)
Outer Shell
On/Off Switch
Inlet Connector
REAR VIEW
Figure 1 - 375,000 Btu/Hr Models
For more information, visit www.desatech.com
For more information, visit www.desatech.com
103018-01H

UNPACKING

1. Remove all packing items applied to heater for shipment. Keep
2. Remove all items from carton.
3. Check all items for shipping damage. If heater is damaged,

THEORY OF OPERATION

The Fuel System:
propane gas supply. The propane gas moves through the solenoid
valve and out the nozzle.
The Air System:
around the combustion chamber. This air is heated and provides a
Handle
stream of clean, hot air.
The Ignition System:
to the ignitor. The ignitor ignites the fuel and air mixture.
Fan
Guard
The Safety Control System:
down if the flame goes out. The motor will continue to run, but no
heat is produced.
Clean
Heated
Air Out
(Front)
Power
Cord
Hose/Regulator
Assembly
Figure 2 - Cross Section Operational View
Thermostat Knob
SAFETY INFORMATION
PRODUCT IDENTIFICATION
THEORY OF OPERATION
plastic cover caps (attached to inlet connector and hose/regu-
lator assembly) for storage.
promptly inform dealer where you bought heater.
The hose/regulator assembly attaches to the
The motor turns the fan. The fan pushes air into and
The direct spark ignitor (DSI) sends voltage
This system causes the heater to shut
Combustion
Chamber
DSI
Nozzle
Air For Combustion
3 3
UNPACKING
Fan
Ignitor
Motor
Cool Air
In (Back)
Power
Cord
Solenoid
Valve
Hose/
Regulator
Air For Heating
Assembly