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Trane CenTraVac CVHE - Page 79

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CVHE-SVX005C-EN
79
Figure 56. Sequence of operation: Fast restart within postlube
External Auto-Stop
Tracer Stop
Normal Non-Latching Diagnostic
Local Stop
Preparing Shutdown Shutting Down Waiting to Start
Stop Command
Removed and Need to Cool
Running
Starting
Compressor
Close IGV (0 to 50 seconds) Postlube:
(CVH: 0 to 3 minutes)
(CVG: 0 to 1 minute)
Establish Condenser Water Flow
(6 seconds minimum)
Enforce Restart Inhibit Timer
Evaporator Pump Off Delay Time
(0 to 30 minutes)
Close IGV
Energize Condenser
Water Pump Relay
Confirm Condenser Water Flow
Within 4 minutes 15 seconds
(6 seconds Filter)
Energize Evaporator Water Pump
Relay (Only if Evaporator Pump
Off Delay Timer has Expired)
De-Energize
Compressor
Confirm Evaporator Water Flow
Within 4 minutes 15 seconds
(6 seconds Filter)
Confirm No Compressor
Currents Within
0 to 30 seconds
De-Energize Condenser
Water Pump Relay
Start-Up and Shutdown

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