PRODUCT IDENTIFICATION UNPACKING THEORY OF OPERATION
3
PRODUCT IDENTIFICATION
Hot Air
OutletUpper Shell (Front) 
Handle
Fan Guard
Lower Shell
| Power Cord |
On/Off | Thermostat Knob |
Switch | |
Inlet |
|
Connector |
|
Hose/Regulator |
|
Assembly |
|
UNPACKING
1.Remove all packing items applied to heater for shipment. Keep plastic cover caps (attached to inlet connector and hose/regu- lator 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 solenoid 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 direct spark ignitor (DSI) sends voltage to the spark plug/ignitor. The spark plug/ignitor ignites the fuel and air mixture.
The Safety Control System: This system causes the heater to shut down if the flame goes out.
Figure 1 - 150,000 Btu/Hr Model
Combustion Chamber | Ignitor | Fan |
| ||
|
|
Motor
Clean 
Heated Air Out (Front)
Cool
Air In (Back)
Nozzle
|
|
| Power |
|
|
| Cord |
DSI | Solenoid | On/Off Switch | |
| Valve |
| Hose/Regulator |
|
|
| |
Air For Combustion |
| Fuel | Assembly |
And Heating |
|
|
|
Figure 2 - Cross Section Operational View
For more information, visit www.desatech.com