100 RTHD-SVX02H-EN
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 71. Normal Shutdown
Seasonal Unit Shutdown
1. 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 power
from the control power transformer to the oil
sump heater.
2. Verify that the chilled water and condenser water
pumps are cycled off. If desired, open the disconnect
switches to the pumps.
3. Drain the condenser piping and cooling tower, if de-
sired.
4. Remove the drain and vent plugs from the condenser
headers to drain the condenser.
5. Verify that the Crank Case heater is working.
6. Once the unit is secured, perform the maintenance
identified in the following sections.
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