Unit Shutdown; Normal Unit Shutdown; Extended Shutdown Procedure - Trane CGWF Installation Operation & Maintenance

Local Stop
Normal Latching Diagnostic
Chiller Level Non-Latching Diagnostic
Tracer Stop
External Auto-Stop
Chiller
Level
Lead
Circuit
30 Seconds or Low Suction Rfgt Pressure
De- Energize
Cprsr B
Close Liquid Line
Solenoid Valve
Lag
Circuit
30 Seconds or Low Suction Rfgt Pressure
De-Energize
Cprsr B
Close Liquid Line
Solenoid Valve
Figure 24

Normal Unit Shutdown

CGWF-SVX01A-EN

Unit Shutdown

Normal Unit Shutdown
( p
Running
Shutting Down
(Operational Pumpdown)
Shutting Down
(Operational Pumpdown)

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.
p )
Shutting Down
Evap Pump Off Delay Timer
(0 to 30 Minutes)
De-Energize Condenser
Water Pump Relay
Auto
De-Energize
Energize
Cprsr A
Cprsr B
Auto
De-Energize
Cprsr A
Stopped
Run Inhibit
Stopped
or Run
Inhibit
De-Energize Evaporator
Water Pump Relay
81