Trane Ascend ACR C Series User Manual

AC-SVX003A-EN
89
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 35. Sequence of events: normal shutdown to stopped or run inhibit
* & ** Operational Pumpdown Requirement and Termination - See
Satisfied Setpoint Operational Pumpdown sequence diagram for
specific criteria.
Note: If Free Cooling is active, the last stage of cooling to turn off
will be Free Cooling.
Shutting Down
Running Circuit Modes: Shutting Down
SubMode: Operational Pumpdown
*
Operational Pumpdown
(See max allowed time below)
Fully Close EXV
Perform Operational
Pumpdown for All
Running Circuits if
Required
*
IF*
Close EXV
(0 to 25 Seconds)
Check for
Normal Pumpdown
Termination Criteria Met
**
No Pumpdown Required
Pumpdown
Required
Evaporator Pump Off Delay
(Adjustable 1 to 30 Minutes)
Send Stop Command to
All
Running Compressors
Energize All Heaters
Fully Close Both EXVs
Turn Off All Running
Circuits Condenser Fans
De-Energize Evaporator
Water Pump Relay
Stopped
or
Run Inhibit
One or
More
Circuits
Running
Normal Pumpdown Termination
**
Criteria is Met for All Circuits
Local Stop
Chiller Level Diagnostic – Normal Shutdown Latched
Chiller Level Diagnostic – Normal Shutdown Nonlatched
Building Automation System Stop
External Auto-Stop
Shutting Down
Circuit Modes:
Auto
Stopped or Run Inhibit
Circuit Modes:
Stopped or Auto
Start-up and Shutdown

Trane Ascend ACR C Series Specifications

General

Brand	Trane
Model	Ascend ACR C Series
Category	Chiller
Language	English