Emerson Vilter VilTech, Руководство по эксплуатации и обслуживанию

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Stopping the Compressor
The stopping sequence is as follows:
1. The Motor is stopped, the capacity stages are unloaded, and Cooling Control outputs are de-
energized.
2. When the motor starter auxiliary contact opens within 15 seconds, the compressor will transition to the
STOPPED state.
3. Once the compressor is stopped, oil temperature regulation may begin using the Oil Heater output and
Oil Temperature input.
The RECIP compressor can be stopped manually or automatically depending on the operating mode. Any failure
will automatically stop the compressor.
Manual Stop
A
M
ANUAL
S
TOP
is accomplished by using the stop button on the Viltech panel. The stop button
is active on all screens and causes an immediate shutdown of the motor. Use of the manual Stop
button will also take the compressor off-line.
Automatic Stop
When the
A
UTO
S
TART
/S
TOP
feature is enabled and the compressor is in the Automatic mode, the
compressor will stop automatically when the control parameter falls below the cut-out setpoint.
Remote/Auto Remote Stop
I/O Control
When remote operation is desired using discrete I/O signals, the Remote Start/Stop input signal is used to stop the
compressor for the Auto-Remote mode. When the Remote Start/Stop input is de-energized, the compressor will
stop but remain on-line. A failure or manual stop command will stop the compressor and force it off-line.
Network Control
When the NETWORK COMMUNICATIONS option is enabled, stopping in the Remote and Auto-Remote modes is
performed using messages from a remote computer. Separate messages are available to stop the compressor and
leave it on-line, or to stop the compressor and force it off-line. For more information on network operation, please
refer to Appendix C.
Sequenced Stop
When the STOP command is received from the master sequencer, the Viltech will stop the RECIP
compressor automatically and leave it on-line for sequenced operation. While stopped on-line, the
compressor is available for sequencing and in standby waiting for commands.