Start-Up/Recycle Operation

If the machine is not running when ice build activates, then the PIC checks the following

parameters, based on the ICE BUILD TERMINATION value, to avoid starting the compressor

unnecessarily:

if ICE BUILD TERMINATION is set to the TEMPERATURE ONLY OPTION and the ENTERING CHILLED WATER temperature is less than or equal to the ICE BUILD SETPOINT;

if ICE BUILD TERMINATION is set to the CONTACTS ONLY OPTION and the remote contacts are open;

if the ICE BUILD TERMINATION is set to the BOTH (temperature and contacts) option and ENTERING CHILLED WATER temperature is less than or equal to the ICE BUILD SETPOINT and remote contacts are open.

The ICE BUILD RECYCLE OPTION determines whether or not the PIC will go into a

RECYCLE mode. If the ICE BUILD RECYCLE OPTION is set to DSABLE (disable) when the

ice build terminates, the PIC will revert back to normal temperature control duty. If the ICE

BUILD RECYCLE OPTION is set to ENABLE, when ice build terminates, the PIC will go into an

ICE BUILD RECYCLE mode and the chilled water pump relay will remain energized to keep the

chilled water flowing. If the entering CHILLED WATER/BRINE TEMPERATURE increases

above the ICE BUILD SETPOINT plus the RECYCLE DELTA T value, the compressor will

restart and control the CHILLED WATER/ BRINE TEMPERATURE to the ICE BUILD

SETPOINT.

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Carrier PC211 specifications Start-Up/Recycle Operation