Trane Optimus RTHD - Ice Building Sequence (Running to Running)

Start-Up and Shutdown
64 RTHD-SVX01K-EN
Immediate Shutdown to Stopped or Run
Inhibit
The Immediate Shutdown diagram shows the Transition from Running through an Immediate Shutdown. The Dashed
lines on the top attempt to show the final mode if you enter the stop via various inputs.
Figure 34. Sequence of events: immediate shutdown to stopped or run inhibit
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Immediate Shutdown to Stopped or Run Inhibit
Running
Immediate Shutdown Non-Latching Diagnostic
Immediate Shutdown Latching Diagnostic
Front Panel Immediate Shutdown
Run Inhibit
or
Stopped
De-Energize
Compressor
De-Energize
Condenser Water Pump
Evap Pump Off Delay Time (0-30 Minutes)
De-Energize Evaporator
Water Pump Relay
Confirm No Compressor Currents
8 Seconds after compressor is de-energized
Stopped
Run Inhibit
Shutting Down
Energize Unload
Solenoid for 60 mins
Open EXV
De-Energize Primary Oil
Line Solenoid Valve
Energize Oil Heater
Open EXV (0-20 Seconds)
Close EXV (20 Seconds)
Shutting Down
Shutting Down
Close EXV
EXV Closed and Evap
Pump Off Delay Complete