www.desatech.com
120193-01A
7
UnPacking
Figure 2 - Cross Section Operational View
Clean.
Heated.
Air.Out.
(Front)
Combustion.Chamber
Hose/Regulator.
Assembly
Injector
Motor.and.
Blower
Assembly
Cool.
Air.In.
(Back)
Power.Cord
Fuel
DSI
Air.for.Fuel.
System
Thermal.Switch
Ignitor,.Flame.
Sensor.and.ODS
Burner
Air.Pressure.Switch
1.. Remove. all. packing. items. applied. to.
heater for shipment. Keep plastic cover
caps. (attached. to. inlet. connector. and.
hose/regulator.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.automatic.control.valve.and.out.the.injector.
The Air System:
.The.motor.turns.the.fan..The.fan.pulls.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.ignitor...The.
spark.ignitor.ignites.the.fuel.and.air.mixture.
The Safety Control System:
.There.are.4.independent.systems:
1..
Flame Sensor:
This system causes the heater to shut down if the flame goes out.
2..
Thermal Switch:
.This.system.causes.the.heater.to.shut.down.if.the.heater.gets.too.hot.
(blocked.openings).
3..
Air Pressure Switch:
.The.system.will.not.allow.the.heater.to.start.if.there.is.not.adequate.
air flow.
4..
ODS - Oxygen Depletion System:
.This.system.shuts.down.the.heater.if.the.oxygen.level.
drops below the specified level (18%).
ODS Operation:
Burner porting "blows" out causing flame sensor to cool, shutting down heater.
