Proheat M125 - Manual (Page 27)

Coolant is circulated through the heat exchanger via the inlet and outlet ports.
Heat is transferred from the heat exchanger through the inner wall of the
exchanger into the coolant. The exhaust gases are directed out through the
exhaust port.
Measures the coolant temperature near the outlet port of the heat exchanger
and sends this information to the G-II PCM. The dual mode sensor contains
both digital and analog sensing elements for more accurate and reliable mea-
surements. The sensor also touches the inner heat exchanger surface to mea-
sure the heat exchanger temperature for an overheat condition.
Heat Exchanger:
Coolant Pump:
Dual Mode Temperature
Sensor G-II PCM:
Air Relief:
(Rotary Vane Compressor ONLY)
WARNING
The Dual Mode Temperature Sensor must be properly installed in the heat
exchanger at all times for overheat protection.
Circulates coolant through the PROHEAT and vehicle heating system.
Depending on the PROHEAT installation, it may be operated by the G-II PCM.
Regulates air pressure to the fuel nozzle.
For use with Rotary Vane Compressor ONLY Serial Numbers 600000 – 699999.
Refer to page D-1 for more information.
2-2 PROHEAT M-SERIES G-II PCM SERVICE MANUAL