Carrier 17/19EX - Manual (Page 105)

The Ice Build Time Schedule defines the period during which ice build is active if the ice build
option is ENABLED. If the Ice Build Time Schedule overlaps other schedules defining time, then
the Ice Build Time Schedule shall take priority. During the ice build period, the WATER/BRINE
CONTROL POINT is set to the ICE BUILD SETPOINT for temperature control. The ICE BUILD
RECYCLE OPTION and ICE BUILD TERMINATION entries from a screen in the Config
(configuration) table provide options for machine recycle and termination of ice build cycle,
respectively. Termination of ice build can result from the ENTERING CHILLED WATER/BRINE
temperature being less than the ICE BUILD SETPOINT, opening of the REMOTE CONTACT
inputs from an ice level indicator, or reaching the end of the Ice Build Time Schedule.
Ice Build Initiation
The Ice Build Time Schedule provides the means for activating ice build. The ice build time
table is named OCCPC02S.
If the Ice Build Time Schedule is OCCUPIED and the ICE BUILD OPTION is ENABLED, then
ice build is active and the following events automatically take place (unless overridden by a
higher authority CCN device):
1. Force CHILLER START/STOP to START.
2. Force WATER/BRINE CONTROL POINT to the ICE BUILD SETPOINT.
3. Remove any force (Auto) on the ACTIVE DEMAND LIMIT.
Note: Items 1-3 (shown above) shall not occur if the chiller is configured and operating as a lag