Trane Optimus RTHD - Satisfied Setpoint Sequence

60
RTHD-SVX01L-EN
Satisfied Setpoint
The Satisfied Setpoint diagram shows the normal transition
from Running to shutting down due to the Evap Leaving
water temp falling below the differential to stop setpoint.
Figure 32. Sequence of events: satisfied setpoint
Running
Auto
Preparing to Shutdown
Energize Unload
Solenoid
Shutting Down
Enforce All Running Mode Diagnostics
De-Energize
Compressor
De-Energize Condenser
Water Pump Relay
Energize Unload Solenoid
(40 Seconds)
Confirm No Compressor Currents
Within 0 - 30 Seconds
Satisfied Setpoint
Open EXV
Open EXV
(0-20 Seconds)
De-Energize Primary Oil
Line Solenoid Valve
Continue to Energize Unload
Solenoid for 60 Mins
Energize Oil Heater
Shutting Down
Close EX V
Close EX V
(20 Seconds)
Pre-Position EXV
to 38% Open for
Next Start
Start-Up and Shutdown