Airedale Ultima FreeCool UFC 575 [35/46] Ultima freecool chillers

ULTIMA FREECOOL Chillers

Chillers

Installation & Maintenance Manual : 903-125 IM E 05/04/A

Commissioning Procedure

PRE COMMISSIONING CHECKLIST (CONT..)

Waterflow

Commissioning

• Drive the 3-way valve fully open by raising the return water temperature above the

ambient and measure the pressure drop across the free cooling coils.

• Lower the return water temperature to below the ambient to close the valve fully.

• Adjust the bypass DRV to achieve equivalent pressure drop as across the coils.

• Recheck again during valve fully open and closed checking pressure drop across

the unit to ensure equal pressure drops are achieved.

• Reduce the flow rate to 75% of design and ensure that the evaporator flow switch

trips at this flow rate, adjust as necessary.

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

Press

Prg

, press , press , press & finally .

RECORD

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

Re-instate both the liquid injection and liquid line solenoid valves.

CAUTION

Remove the link from the MCCB for the auxiliary alarm contact.