Unit Shutdown; Normal Shutdown To Stopped; Seasonal Unit Shutdown - Trane AdaptiR RTHD Installation Operation & Maintenance

Unit Shutdown

Normal Shutdown to Stopped

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 69. Normal Shutdown
Note: For variable vi compressor units, no unload solenoid valve cycle during the process of

Seasonal Unit Shutdown

9. Perform the normal unit stop sequence using the <Stop> key.
Note: Do not open the starter disconnect switch. This must remain closed to provide control
10. Verify that the chilled water and condenser water pumps are cycled off. If desired, open the
11. Drain the condenser piping and cooling tower, if desired.
12. Remove the drain and vent plugs from the condenser headers to drain the condenser.
13. Verify that the Crank Case heater is working.
14. Once the unit is secured, perform the maintenance identified in the following sections.
RTHD-SVX04K-EN
AdaptiR™ with AFD option Sequence of Operation:
Normal Shutdown to Stopped/Run Inhibit
shutdown, and the unload solenoid valve shall be activated for 30 minutes after shut-
down.
power from the control power transformer to the oil sump heater.
disconnect switches to the pumps.
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