Airedale Ultima FreeCool UFC 225 [34/46] Chillers ultima freecool
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Airedale Ultima FreeCool UFC 225 [34/46] Chillers ultima freecool

Airedale Ultima FreeCool UFC 575 [34/46] Chillers ultima freecool
Chillers ULTIMA FREECOOL
Chillers
Installation & Maintenance Manual : 903-125 IM E 05/04/A
33
Commissioning Procedure
GENERAL
To be read in conjunction with the commissioning sheets provided, items highlighted
should be recorded.
CAUTION
Please ensure all documents have been completed correctly and return to Airedale
Service immediately to validate warranty.
PRE COMMISSIONING CHECKLIST
ALL work MUST be carried out by Technically Trained competent personnel.
The equipment contains live electrical and moving parts, ISOLATE prior to
maintenance or repair work.
Prior to carrying out the following, in order to prevent liquid entering the
compressor whilst the mains MCCB are in the OFF position, isolate the liquid
injection and liquid line solenoid valves at the terminal blocks.
CAUTION
The door interlocking MCCB should be in the OFF position and the auxiliary alarm
contact from the MCCB should be linked out.
Ensure all items listed in the Pre commissioning section are complete.
RECORD
• The unit should be visually inspected and any damage noted.
• Secure commissioning gauges to the high side of the system, check for a
positive charge.
• Check tightness of electrical components.
• Check that the remote on/off switch (if fitted) is in the off position.
• With the MCBs in the off position measure the incoming voltage.
• Check Phase Rotation.
• Check voltage at permanent supply.
• Measure and record the primary (230V) and secondary (24V) voltages at each of
the transformers and record on the commissioning document.
• Check all timer settings are correct.
• Check Sump Heater.
• Check oil level.
• Check design water flow is available.
• Check pump interlocks are fitted to the water system and wired directly to the
chiller.
• Switch on the controls and individual circuits, primary and secondary, MCBs to the
ON position. At this stage the control display panel should be illuminated.
• Record Optional Extras.
• Record Controller Data.
Disable remote ON/OFF to ensure the unit does not start unintentionally.
The chiller will not start until microprocessor control SWITCH 1 is in the ON
position. DO NOT SWITCH TO ON AT THIS STAGE
• Adjust the water temperature supply and return set points (if necessary) to call for
100% cooling (refer to the
Controls section).
• Ensure all parameters are adjusted to suit the design requirements (refer to the
Controls section).
CAUTION
• To switch the unit ON, use the microprocessor keypad as follows:
Press
Prg
, press , press , press & finally .
There will always be a delay between the enabling of the unit and the energising of
the compressor contactors, anything up to 10 minutes. Be patient.
CAUTION
• Check that there is a 5 seconds delay between the Star and Delta contactor
energising on each circuit.
This delay period would be 0.7 seconds in Closed Transition Starting.
• Check capacity control solenoid is 12% energised (red).
• Check that each circuit trips on low pressure. The alarm should appear within
3 minutes.
CAUTION
• The alarm will be recognised at the display circuit trip, to clear the alarms refer to
Alarm Handling.

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