Section 6 - Commissioning; Commissioning; Preparation - Power Off - York YCAE065 Manual

COMMISSIONING

Commissioning of this unit should only be carried out by YORK Authorized
personnel.
Commissioning personnel should be thoroughly familiar with the information contained in this
literature, in addition to this section.
Perform the commissioning using the detailed checks outlined in the START-UP CHECK LIST as the
commissioning procedure is carried out.
PREPARATION – POWER OFF
The following basic checks should be made with the customer power to the unit switched OFF.
Inspection
Inspect unit for installation damage. If found, take action and/or repair as appropriate.
Refrigerant Charge
Packaged units are normally shipped as standard with a full refrigerant operating charge. Check that
refrigerant pressure is present in each system and that no leaks are apparent. If no pressure is present,
a leak test must be undertaken, the leak(s) located and repaired. Repaired systems must be
evacuated with a suitable vacuum pump/recovery unit as appropriate to below 100 microns before
charging.
Do not liquid charge with static water in the cooler. Care must also be taken to
liquid charge slowly to avoid excessive thermal stress at the charging point.
Once the vacuum is broken, charge into the condenser coils with the full operating charge as given
in the Technical Data section.
Liquid subcooling measured at the liquid line should be between 5℃ and 8℃ when unit is operating
in cooling mode and fully loaded. Subcooling is determined by the level of refrigerant charge in each
system.
Compressor Oil
The units are charged with sufficient oil to ensure the effective and reliable operation in full envelope.
However, the units may need additional oil charge in field in case leakage is detected or the
compressor is being replaced.
Cooke Industries - Phone: +64 9 579 2185
SECTION 6 – COMMISSIONING
Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz