TM 10-5410-228-24
NOTE
Heat is only supplied by electric heaters.
The heat source for Heat Mode is provided by applying 208 Vac to one or more heater elements located in the
air stream of the ECU pod. When the 10 kW TQG is used as the power source, only one heater element is
used. +24 Vdc is applied to the coils of solenoid valves SV2, SV5, and SV9. SV2 and SV5 open and SV9
closes. Hydraulic fluid flows through the NBC fan motor, M3, and through SV9, bypassing the recirculation
fan motor, M2. It is then routed to the oil cooler, filter, and reservoir through SV5 and SV7. Air flow from the
NBC fan is heated by the electrical heating element.
Valve
SV1
SV2
SV4
SV5
SV6
SV7
SV8
SV9
Energized State
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
Position
Closed
Open
Closed
Open
Closed
Open
Closed
Open
