To add oil to a circuit – connect a YORK hand oil pump to the 1/4” oil charging connection before the
accumulator with a length of clean hose or copper line, but do not tighten the flare nut. Using clean
oil of the correct type, pump oil until all air has been purged from the hose then tighten the nut.
Stroke the oil pump to add oil to the oil system. Approximately 1.6 liters is present in single compressor
system and 5.0~5.5 liters in tandem compressor system. Too much oil may cause excessive oil
carryover in the system. High oil concentration in the system may cause nuisance trips resulting from
incorrect readings on temperature sensors. Temperature sensor errors may result in poor liquid
control and resultant liquid overfeed and subsequent damage to the compressor.
Fans
Check that all fans are free to rotate and are not damaged. Ensure blades are at the same height
when rotated. Ensure fan guards are securely fixed.
Isolation / Protection
Verify all sources of electrical supply to the unit are taken from a single point of isolation. Check that
the maximum recommended air switch sizes given in the Technical Data section has not been
exceeded.
Control Panel
Check the panel to see that it is free of foreign materials (wire, metal chips, etc.) and clean out if
required.
Power Connections
Check that the customer power cables are connected correctly to the terminal blocks or circuit breaker.
Ensure that connections of power cables within the panels to the circuit breaker or terminal blocks
are tight.
Grounding
Verify that the unit’s protective ground terminal(s) are properly connected to a suitable grounding point.
Ensure that all unit internal ground connections are tight.
Supply Voltage
Verify that the site voltage supply corresponds to the unit requirement and is within the limits given in
the Technical Data section.
PREPARATION – POWER ON
Apply power to the unit.
Water System
Verify the chilled liquid system has been installed correctly, and has been commissioned with the
correct direction of water flow through the cooler. The inlet should be at the higher end of the cooler.
Purge air from the top of the water system using the plugged air vent mounted on the top of the piping.
Flow rates and pressure drops must be within the limits given in the Technical Data section. Operation
Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz
To Next Page
Loading...
