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CVHE-SVU01E-EN
20
General
Information
Ice Machine Control
The control panel 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 1) from the
“Front Panel”, 2) if hardware is
specified, will accept either an
isolated contact closure (1A19
Terminals J2-1 and J2-2 (Ground) ) 3),
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, or
2. Opening the external Ice. Contacts/
Remote communicated input
(Tracer), or
3. Satisfying an evaporator entering
fluid temperature setpoint (Default
to 27°F).
4. Surging for 7 minutes at full open
IGV.
Figure 14. CVHE, CVHF and CVHG sequence of operation: ice making: running
to ice making
Figure 15. CVHE, CVHF and CVHG sequence of operation: ice making:
stopped to ice to ice building complete