Proheat X45–School Bus - Manual (Page 20)

OPERATING YOUR
PROHEAT HEATER
ENGINE HEAT ONLY
1. Switch the ON/OFF switch located in the vehicle dash to “ON.”
The switch will light and the heater will cycle on. It will continue to operate until
the coolant reaches 185˚F (85˚C) at the heater outlet and then cycle “OFF.”
When the coolant temperature falls below 150˚F (65˚C) at the heater
outlet, it will refire and repeat the cycle.
It will continue to cycle until:
a) the heater is switched “OFF,”
b) the heater runs out of fuel,
c) the vehicle battery voltage drops below 10.0 Volts, or
d) an error occurs and the switch light flashes
(See Troubleshooting & Repair, Section 5)
NOTE: The PROHEAT may be operated if the engine is running or not running.
2. When engine preheat is no longer required, switch the PROHEAT heater
“OFF.”
ENGINE AND SLEEPER HEAT
1. Switch the ON/OFF switch located in the vehicle dash to “ON.”
The switch will light and the heater will cycle on. It will continue to operate until
the coolant reaches 185˚F (85˚C) at the heater outlet and then cycle “OFF.”
When the coolant temperature falls below 150˚F (65˚C) at the heater
outlet, it will refire and repeat the cycle.
It will continue to cycle until:
a) the heater is switched “OFF,”
b) the heater runs out of fuel,
c) the vehicle battery voltage drops below 10.0 Volts, or
d) an error occurs and the switch light flashes
(See Troubleshooting & Repair, Section 5)
NOTE: The PROHEAT may be operated if the engine is running or not running.
2. For sleeper heat – set the thermostat in the sleeper to the desired
temperature. If the set temperature is higher than the temperature in the
sleeper the fan will cycle “ON.” When the air reaches the set temperature
the fan will cycle “OFF.” The fan will cycle “ON” and “OFF” to maintain the
set temperature.
3. When engine and/or sleeper preheat is no longer required, switch the
PROHEAT heater “OFF.”
2.0
NOTICE
Regular use of your PROHEAT
throughout the year will improve
its reliability. Weekly operation is
recommended.
NOTICE
The PROHEAT heater can be
operated by either using a toggle
switch or a 7 day timer.
Refer to page 3-10 for WIRING &
ELECTRICAL CONNECTIONS.
NOTICE
These instructions cover Standard
Mode operation that are normally
installed on trucks. To operate your
heater in Preheat or Supplemental,
refer to page 3-18 to page 3-20 and
page 4-6 to page 4-7.
2-1 SECTION 2. OPERATING YOUR PROHEAT HEATER