i BLACK WIF WHITE WIRE BROWIs TO FUEL SOLENOID gLU WHITE WIRE v BLACK WIRE IGNITION C i THERM COMBUSTION BLOWER HI Fig 1 1 4 Pic cup and is thoroughly mixed with the fuel Thi highly combustible mixture is ignited instantly by the spark plug and an intense flame is established in the heater The flame quickly heats the walls of the heal exchanger to a high temperature and the heat is absorbed by the ventilating air which is drawn ir r through the cowl vent by the ventilating air blower The warm air enters the air distributor inside the cai and the temperature begins to rise This entire procesE takes place very quickly The very rapid temperature rise is the result of the flame intensity and the construction of the heat exchanger which absorbs very little heat itself Since it is not necessary to heat water or any other component of the vehicle heat is obtained quickly The hot gases which result from burning in the combustion chamber pass out through a slot at the top o1 the inner cylinder of the heat exchanger and are then forced through the outer wrap before they pass out the r RED TO HEATER CONTROL SWITCH ES WHITE WIRE I WIRE TO THERMOSTAT E WIRE TO BATTERY BLACK WIRE BLUE WIRE TO RELAY RED WIRE RED WHITE WIRE W WHITE WIRE v RELAY I lV PURGE SWITCH 4 l OIL STAT VENTILATOR ATER CONTROL SWITCH BLOWER lorial Wiring Diagram exhaust tube at the bottom The scrubbing action of the gases as they pass through the narrow channels causes the heat to be transferred to the ventilating air stream and produces a high level of heating efficiency in the system During the starting and warm up period the thermostat will remain closed until the heated air reaches the temperature of the thermostat setting When the desired temperature is achieved the thermostat will open and shut off the heater ignition system and fuel flow by de energizing the solenoid valve The combustion air blower and ventilating air blower will continue to operate Since the temperature in the distributor begins to drop as soon as burning stops the thermostat switch soon closes The solenoid valve then opens to supply fuel spark is made and combustion occurs After ignition the temperature rises and the entire cycle is repeated This on off operation occurs at a rapid rate so