C6.1.6/0117-1017/E
37
Figure 25: Service valves for refrigerant charging
An additional Schraeder connection is fitted on the liquid line
below the filter drier in the compressor chamber. It is also possible
to use this connection for charging or servicing.
Recommendation is to break vacuum in the system with partial
charge of refrigerant, then start the system.
For charge adjustment it is recommended to check the liquid sight
glass just before the expansion valve.
Figure 26: Liquid line service port
NOTE: During the charging process on low temperature ZXLE units, an error message E47
and/or E48 could occur. Both warnings indicate a lack of refrigerant charge in the system.
The operation of the unit is not affected by the warning signals. Continue charging the
system: as the quantity of refrigerant increases, the warning signals will automatically switch
off.
4.2.2 Oil charging procedure
Copeland EazyCool ZX condensing units are pre-charged with oil. After commissioning, the oil level
should be checked and topped up if necessary.
NOTE: The oil level should be approximately halfway up the sight glass.
Emerson recommends charging the oil with one of the following oil types:
▪
Emkarate RL 32 3MAF
▪
Mobil EAL Arctic 22 CC
Charging is done through the Schraeder valve located on the suction valve.
4.2.3 Oil separator
ZXDE & ZXLE units are equipped with an oil separator. This separator is pre-charged with 0.5 liter
of oil.
4.3 Rotation direction of Scroll compressors
Scroll compressors, like several other types of compressors, will only compress in one rotational
direction. Direction of rotation is not an issue with single-phase compressors since they will always
start and run in the proper direction. Three-phase compressors are protected against wrong rotation
field by the unit controller.
Service valves
Hexagone socket wrench
Valve covers
Schraeder valves
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