Chillers
ULTIMA 2000
Chillers
30
Installation & Maintenance Manual : 903-099 IM E 05/00
Commissioning Procedure
PRE COMMISSIONING CHECKLIST (CONT..)
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Check capacity control timing as detailed previously.
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Check that each circuit trips on low pressure. The alarm should appear within
3 minutes.
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The alarm will be recognised at the display circuit trip, clear the alarms as detailed
in the microprocessor manual.
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RECORD
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Reduce the flow rate to 75% of design and ensure that the evaporator pressure
differential switch or flow switch trips off this flow rate, adjust if necessary.
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Ensure this alarm is recognised at the display and disengages the circuits operation
immediately. Restore flow rate to the design and check the alarm has self-cleared.
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Turn the unit OFF by setting SWITCH 1, enable unit to the OFF position.
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Fully open all liquid line and discharge service ball valves on each circuit.
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Re-instate both the liquid injection and liquid line solenoid valves.
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CAUTION
Remove the link from the MCCB for the auxiliary alarm contact.
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