ClimaCool UCR Remote Air Cooled - Manual (Page 29)

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CoolLogic Control System
Remote Master Control system shall be fully
compatible with the Building Automation System
via native BACnet and LonWorks, Modbus and N2
communication. Scheduling of the various compressors
shall be performed by the master microprocessor
based controller. A compressor run time equalization
sequence is provided to ensure even distribution of
compressor run time. A load limit control shall be
available to limit the number of compressors that can be
energized at one time.
The CoolLogic Control System shall monitor and report
the following for each refrigeration circuit in each
module:
• Discharge pressure and temperature faults
• Suction pressure and temperature faults
• Compressor winding high temperature fault
• Low evaporator leaving chilled water temperature
fault
The Master Controller shall monitor and report the
following system parameters for the chiller system:
• Chilled water entering and leaving temperature
• Evaporator
water fl ow availability
Any module failure condition shall cause a “fault”
indication at the Master Control Panel and shutdown
of that compressor circuit with the transfer of the load
requirements to the next available compressor circuit.
In the case of a System “fault” the entire chiller will
be shut down. When any fault occurs, the CoolLogic
Control System shall record conditions at the time of
the fault, and store the data for recall. This information
shall be capable of recall through the keypad of the
Master Control Panel and displayed on the 4 line by
40 character, back-lit LCD. A history of faults shall be
maintained including date and time for each fault (up to
the last 100 occurrences). Internal leaving chilled water
reset control will insure that the parallel evaporators are
operated above the freeze point for part load operation.
Factory Testing
Each remote air cooled chiller module shall be pressure-
tested, evacuated and charged with nitrogen.
Engineering Guide Specifi cations