Proheat X45–School Bus - Manual (Page 37)

Figure 3-24 Option C
PROHEAT INSTALLATION & SERVICE 3-16
1. Make sure the vehicle ignition is switched “OFF.”
2. Locate the auxiliary heater in a suitable area of the vehicle. Install plumbing
and air duct connections as per the manufacturer’s recommendations.
3. Locate the PROHEAT thermostat in a central area of the sleeper,
approximately 12" above the bunk. Avoid direct air flow from sleeper fan
ducts. (Figure 3-25)
4. Remove the adjusting knob and face cover. Mark and drill mounting
holes. Mount thermostat using the screws provided. (Figure 3-27)
5. Route sleeper fan harness from PCM to PROHEAT thermostat. Cut to
length. Connect white wire to terminal 1 of the thermostat using the fork
terminal provided. Black wire is not used.
6. Route a wire from terminal 2 of the thermostat to an appropriate wire on
the sleeper fan motor. Make a splice connection and seal the splice with
tape or heat shrink.
NOTE: The electrical power and operation in this option is controlled by the
PROHEAT. See Option B should a relay be required to provide more
electrical power.
PCM
SLEEPER FAN
HARNESS
AUXILIARY
SLEEPER HEATER
THERMOSTAT
1
1
3
4
2
2
BL
AC
K
W
HI
TE
W
HI
TE
SPLICE WIRES
ORANGE
FAN MOTOR
(MULTIPLE WINDING TYPE)
RED
(NOT USED)
GROUND
10 AMP
FUSE
WARNING
Systems using a ground side
battery disconnect must install
a 10 Amp fuse to protect the
sleeper fan harness.
OPTION C – Auxiliary Sleeper Heater 3.5.8
Thermostat Wire Connection Detail
Screw # Wire Colour
1 White (from PCM)
2 White (to sleeper heater)
3 Not used
4 Not used