OPERATE ENGINE COOLANT HEATER KIT (M548A1) Continued
When the switch is at HI, the heater will automatically transfer to low heat if coolant
temperature reaches 190
C), and will switch back to high heat if coolant temperature
drops to 120
C). If coolant should reach 245
C), the heater will stop
automatically and must be restarted manually.
Select high or low heat with the HI-LO switch. The heater will always start on low heat no matter how the HI-LO switch
is set, and will go to high after it starts, if the switch is set at HI.
If heater doesnt start, try again. If it doesnt start in three tries, notify unit maintenance.
To avoid discharging batteries, do not operate lights, radios, or other electrical equipment for
very long while coolant heater is running. Always turn off heater and close coolant shutoff valve
before you start engine.
If you dont operate carrier after 12 hours of running engine coolant heater, run the engine until batteries are charged.
Stop coolant heater while the engine is running. Keep fuel tank full.
The heater will stop burning right away, but the combustion air blower will run until the heater
is purged of fuel and the burner is cool. The indicator light will stay on until the blower stops.
Close the coolant shutoff valve by turning the handle clockwise whenever you stop the heater.
10. To turn heater off, move the RUN-OFF-START switch to OFF.
END OF TASK
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