Airedale Ultima Compact UCC 300 [42/53] Ultima compact chillers

ULTIMA COMPACT Chillers

Chillers

Installation & Maintenance : 903-129 IM E 10/04/C

Commissioning Procedure

PRE COMMISSIONING CHECKLIST

• Check that each circuit trips on low pressure. The alarm should appear within

3 minutes.

• The alarm will be recognised at the display circuit trip, to clear the alarms refer

Alarm Handling.

CAUTION

Prior to the chiller compressors being allowed to start, the Water Flow Fail and

Pump Interlock features MUST both be proven to work correctly.

• To check the water flow fail safety protection is working satisfactorily:

RECORD

Reduce the flow rate to 75% of design and ensure that the evaporator pressure or

flow protection switch trips at this flow rate, adjust as necessary.

With compressors off, ensure this alarm is recognised as “Water Flow Fail” at the

display and disengages the circuits operation immediately. Restore flow rate to the

design and check the alarm has self-cleared.

• To check the pump interlock safety feature works satisfactorily:

RECORD

Switch off the chiller water pump and check the interlock wiring connections at the

chiller are open circuit.

To switch the unit OFF, use the microprocessor keypad as follows:

Press

Prg

, press , press , press & finally .

Fully open all liquid line and discharge service ball valves on each circuit.