AC-SVX002C-EN
67
Normal Shutdown to Stopped or Run
Inhibit
The following diagram shows the Transition from
Running through a Normal (friendly) Shutdown. The
dashed lines on the top attempt to show the final mode
if stop is selected via various inputs.
Figure 49.
Sequence of operation: normal shutdown to shopped or run inhibit
Running
Local Stop
Normal Shutdown Diagnostic*, Latched
Normal Shutdown Diagnostic*, Non-Latched
BAS Stop
External Auto-Stop
Local Schedule Stop
Stopped
or
Run Inhibit
Shutting Down
(Operational Pumpdown)
Shutting Down
(Evaporator Water
Pump Off Delay)
De-Energize Pumpdown
Compressors
Waiting for EXV to Close
(0 to 10 Seconds)
Time out Evap Pump Off Delay
(adj 0-30 minutes)
De-Energize Evaporator
Water Pump
De-Energize all Non-
Pumpdown
Compressors **
De-Energize All Fans
*Normal Shutdown Diagnostic:
- Chiller Level Diagnostic
- Circuit Level Diagnostic on only running circuit
- Compressor Level Diagnostic on only running compressor
**Pumpdown Compressor is:
- One compressor on each circuit running during Operational Pumpdown
***If normal pumpdown termination does not occur within the Pumpdown Timeout
Close EXV
Confirm Pumpdown
Termination. See Note***
Shutting Down
(Operational Pumpdown)
Waiting for Saturated Suction
Temperature to fall to 0 Degrees F
(Less than 30 Seconds)
