Start-Up and Shutdown
RTHD-SVX01K-EN 63
Normal Shutdown to Stopped or Run
Inhibit
The Normal Shutdown diagram shows the Transition from Running through a Normal (friendly) Shutdown. The Dashed
lines on the top attempt to show the final mode if you enter the stop via various inputs.
Figure 33. Sequence of events: normal shutdown to stopped or run inhibit
Running
Local Stop
Normal Latching Diagnostic
Normal Non-Latching Diagnostic
Tracer Stop
External Auto-Stop
Stopped
or
Run Inhibit
Preparing
to Shutdown
Energize Unload
Solenoid
Shutting Down
De-Energize
Compressor
Energize Unload Solenoid
(40 Seconds)
Run Inhibit
Stopped
De-Energize Condenser
Water Pump Relay
Open EXV
De-Energize Primary Oil
Line Solenoid Valve
Energize Unload
Solenoid for 60 mins
Energize Oil Heater
Open EXV
(0 to 20 Seconds)
Evap Pump Off Delay Time
(0-30 Minutes)
De-Energize Evaporator
Water Pump Relay
Close EXV
(20 Seconds)
Close EXV
Shutting Down
EXV Closed and Evap Pump Off Delay Complete
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