Refrigeration Components
Standard Features
Oil Separator
Fitted to ensure higher than usual levels of circulatory oil of the variable speed compressor stay within the unit, and are
not lost to external pipe work causing damage to the compressor.
The component is tted in the discharge line of the compressor and used to separate the oil from the unit’s refrigerant.
The separated oil is then fed back into the suction line to ensure adequate amounts return to the compressor.
Sight Glass
A liquid line sight glass is tted to give an indication of the state of the refrigerant within the system. If the sight glass
becomes yellow it is an indication that the lter drier requires changing.
Optional Features
Refrigerant Leak Detection
If the leak detector reaches the alarm set point, a leak alarm will be set and a message displayed. By default after
detecting a leak, the unit will give an alarm but will continue to run normally. This can be changed to give an alarm and
also shut down the unit and isolate it by closing the liquid line solenoid valve.
If pump-down features are present on the unit, it can be set to give an alarm and also pump-down when a leak is
detected.
Indirect Detection
As well as optional direct leak detection the unit also has indirect refrigerant leak detection as standard. This uses
intelligent monitoring in the software to establish if there is a leak.
If all the following conditions are present then a leak alarm will be generated:
• High superheat with the expansion valve fully open and superheat not reducing.
• High discharge superheat.
• Low sub cool.
Pump-down
Pump-down is used to pump all the refrigerant in the circuit into the outdoor coil and contain it there either when a leak is
detected or when the unit turns off. Containing all the refrigerant in one outdoor area is good practice for safety reasons
as well as being the best way of preventing liquid ood-back to the compressor on restart.
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