Proheat X45–School Bus - Manual (Page 47)

FIRST TIME STARTUP
1. Inspect the entire installation for:
a) loose bolts,
b) loose hoses and hose clamps,
c) loose wires and wire connections,
d) kinked or pinched hoses or wires,
e) battery connection for correct polarity, and
f) coolant supply and return location on the engine.
2. Fill the vehicle cooling system with coolant as per owner’s manual or
engine manufacturer’s recommendations.
3. Place dash heater control in the full “HOT” position. Turn air conditioning
“OFF.”
NOTE: If shut-off valves are installed make sure they are fully “OPEN.”
4. Start the vehicle engine and run it at a fast idle for 5 to 10 minutes to purge
air from the heater and coolant system. While the engine is running:
a) make sure the coolant is flowing freely,
b) inspect hoses and fittings for leaks,
c) check the coolant level in the radiator and add coolant as necessary.
5. Shut the engine “OFF.”
6. Connect the power harness. All segments of the LED will flash on the
PCM. This indicates that power has been supplied. See page 5-4 for
more information.
7. Start the PROHEAT heater using the ON/OFF switch. The indicator lamp
should be lit with a solid red light. Go to the heater and observe its operation.
Test Preheat and Supplemental Mode operation if equipped. Refer to page 3-
18 and page 4-5 for proper information.
Sequence of Events:
a) Coolant temperature must be less than 150˚ (65˚C).
b) “ON” light on PCM should be lit.
c) You should hear the coolant pump, blower and compressor start.
Looking through the inspection port you should see a spark and
a flame.
d) The spark will stop after 60 seconds and the heater will continue
to run.
NOTE: If the indicator lamp in the ON/OFF Switch flashes upon initial
startup – WAIT. The heater will attempt a restart in 3 minutes.
In some cases it takes longer for the fuel pump to prime the empty
fuel lines during the initial start. This is usually the case if the fuel
lines are long (it may take a few restarts). If the light continues to
flash after the restart, then there is a problem.
The Troubleshooting & Repair section of this manual will assist
you in correcting the problem.
3-26 PROHEAT INSTALLATION & SERVICE
3.7