Airedale EasiCool 6kW 64kW - Manual (Page 21)

21 EasiCool EZRE Operational Manual 7610207 V1.0.0_02_2013
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Precision Air Conditioning EasiCool™ EZRE
Unit Operation Checks
Record the following operating conditions of the unit at stable conditions:
•
Suction pressure (Bar)
• Liquid pressure (Bar)
• Discharge pressure (Bar)
• Suction temperature (°C)
• Liquid temperature (°C)
• Discharge temperature (°C)
• Superheat (°C)
• Sub cooling (°C)
• Water return temperature (°C) (CW Units)
• Water supply temperature (°C) (CW units)
• Return air temperature (°C)
• Return air humidity (%RH)
Liquid line sight glass
Record the status of the liquid line sight glass
•
Clear / Flashing
• Wet / Dry
The sight glass is used to indicate:
•
The condition of the refrigerant in the system
• Lack of refrigerant
• Moisture content of the refrigerant
The colour of the sight glass depends on the moisture content of the refrigerant. The recommended moisture levels of a
system should be below 75ppm.
An indication of green / dry are to be considered as perfect conditions meaning full protection by the filter drier against
effects from moisture.
If the green colour starts to fade, the colour change from green to yellow has begun and the indicator should therefore
be watched carefully. If the colour changes to yellow it is a clear signal that the capacity of the filter drier is exceeded
and should be replaced as soon as possible.
F-Gas Leak Detection Checks
Perform an F-Gas refrigerant leak detection on the unit and ensure no refrigerant leaks are visible.
Maintenance
System
System
Task Frequency
3 Mths 12 Mths 60 Mths
Check the following against the commissioning records.
Record operating conditions.
●
Water on / off temperatures. ●
Water pressure drop. ●