Trane CCAF User Manual

CGWF-SVX01A-EN 81
Unit Shutdown
Normal Unit Shutdown
Extended Shutdown Procedure
If the system is taken out of operation for long periods of time, use this procedure to
prepare the system for shutdown.
1. Perform "Manual Pumpdown" procedure described in this section. Be certain to
perform this procedure for both circuits.
2. Test condenser and high side piping for refrigerant leakage.
3. Open electrical disconnect switches for evaporator water pump. Lock the discon-
nect in open position.
4. Open the unit main electrical disconnect and unit-mounted disconnect 1S1 (if
used) and lock in open position.
Figure 24 Normal Unit Shutdown
Energize
Cprsr B
( p p )
Chiller
Level
Lead
Circuit
Lag
Circuit
Stopped
or Run
Inhibit
De-Energize
Cprsr B
Shutting Down
(Operational Pumpdown)
De-Energize
Cprsr A
De- Energize
Cprsr B
Auto
Running
De-Energize
Cprsr A
Close Liquid Line
Solenoid Valve
30 Seconds or Low Suction Rfgt Pressure
De-Energize Condenser
Water Pump Relay
Shutting Down
(Operational Pumpdown)
Local Stop
Normal Latching Diagnostic
Chiller Level Non-Latching Diagnostic
Tracer Stop
External Auto-Stop
Run Inhibit
Stopped
30 Seconds or Low Suction Rfgt Pressure
Close Liquid Line
Solenoid Valve
Evap Pump Off Delay Timer
(0 to 30 Minutes)
De-Energize Evaporator
Water Pump Relay
Shutting Down
Auto

Trane CCAF Specifications

General

Brand	Trane
Model	CCAF
Category	Chiller
Language	English