OPERATION UNDER UNUSUAL CONDITIONS - CONTINUED
OPERATE IN EXTREME COLD - CONTINUED
Place AUX HTR switch (2) in ON position. Green light in switch will illuminate.
AUX HTR light (1) will light when combustion starts after approximately 50 sec-
Preheat engine for approximately 45 minutes and start engine.
If HI-LO switch is set to HI position, heater will automatically switch to low
heat when temperature of coolant at heater inlet reaches 176°F (80°C). LO
position is suitable when heater operates over an extended period.
Place HI-LO switch (4) to desired setting.
To turn auxiliary heater off, place AUX HTR switch (2) to OFF position. Heater
burner will stop and AUX HTR light will go out within a few minutes. Blower will
continue to run for approximately 90 seconds.