Proheat X45–School Bus - Manual (Page 31)

TO SLEEPER FAN OR AUX INPUT
DEPENDING ON MODEL
TO BATTERIES
TO ON/OFF SWITCH
AND/OR TIMER
WIRING & ELECTRICAL
CONNECTIONS
GENERAL CONSIDERATIONS
• Prior to installation of the PROHEAT Heater system, ensure that the
vehicle batteries are in good condition.
• Do not kink or abrade wires when routing them through the vehicle during
installation.
• Ensure wires are well supported and secured with tie-wraps.
• Do not use acid core solder when making solder connections.
Major Electrical Connections Required
a) Power connection to batteries ................................................. page 3-11
b) Timer or ON/OFF switch connections........................................ page 3-12
c) Sleeper fan model heater connections (optional)....................... page 3-14
d) Auxiliary Input model heater connections (optional).................... page 3-18
Figure 3-18 Major Electrical Connections
Figure 3-17 Test Battery
WARNING
Do not use on positive ground
vehicles.
CAUTION
If repairs to the vehicle require
welding, disconnect the PROHEAT
power cable at the PCM. This will
prevent damage to the PROHEAT
electronics.
CAUTION
Vehicles using ground side battery
disconnect switches must install an
in-line 10 Amp fuse on the internal
harness (Proheat part # PK0310).
This will prevent damage to the
harness and PCM, (refer to Service
Bulletin SB0003 in Appendix).
3-10 PROHEAT INSTALLATION & SERVICE
3.5
3.5.1