TM 10-5410-228-24
When the thermostat opens, the heat mode is shut down. This is accomplished by de-energizing solenoid
valves SV5 and SV7. SV5 closes and SV7 opens. This diverts the flow of hydraulic fluid through PD1 to the
condenser fan motor, M1C, from the heating coil, HX-1A, and returns it directly to the oil cooler, HX-2. At
this point the hydraulic system circuit is the same as "Vent Mode" (figure 1-10).
Valve
SV1
SV2
SV4
SV5
SV6
SV7
SV8
SV9
Energized State
OFF
ON
OFF
ON
OFF
OFF
OFF
ON
Position
Closed
Open
Closed
Open
Closed
Open
Closed
Closed
Figure 1-20. Static Mode, Internal Power, Heat Mode, Thermostat Open, Full NBC
