CDHF-SVU01C-EN
26
General
Information
Ice Machine Control
UCP provides a service level “Enable
or Disable” menu entry for the Ice
Building feature when the Ice
Building option is installed. Ice
Building can be entered from “Front
Panel”, or if hardware is specified the
UCP will accept either an isolated
contact closure (1A19 Terminals J2-1
and J2-2 (Ground) ) or a remote
communicated input (Tracer) to
initiate the ice building mode where
the unit runs fully loaded at all times.
Ice building will be terminated either
by opening the contact or based on
entering evaporator fluid
temperature. UCP will not permit the
Ice Building mode to be entered
again until the unit is switched to the
Non-ice building mode and back into
the ice building mode. It is not
acceptable to reset the chilled water
setpoint low to achieve a fully loaded
compressor. When entering ice-
building the compressor will be
loaded at its maximum rate and
when leaving ice building the
compressor will be unloaded at its
maximum rate. While loading and
unloading the compressor, all surge
detection will be ignored. While in
the ice building mode, current limit
setpoints less than the maximum will
be ignored. Ice Building can be
terminated by one of the following
means:
1. Front panel disable.
2. Opening the external Ice. Contacts/
Remote communicated input
(Tracer).
3. Satisfying an evaporator entering
fluid temperature setpoint. (Default
is 27°F)
4. Surging for 7 minutes at full open
IGV.

Figure 18. Sequence of operation: ice making: running to ice making

Figure 19. Sequence of operation: ice making: stopped to ice to ice building

complete