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Unit operation
Oil compressor load
Checking the oil charge
All Trane units compressors are charged with oil at the
factory. The scroll compressors are equipped with an oil
sight glass from which you can control the level. The
precise level should be between two marks that indicate
the minimum and maximum allowable levels. In tandem or
trio performances, pay particular attention to oil level. Not
perfectly leveled sight glasses between compressors in
parallel, but falling in the upper and lower limits, are
considered normal.
Next to the lamp there is a connection on every
compressor for draining the oil and a connection for
refilling.
To refill oil, there is a ¼" Schrader connection.
To refill oil, it is necessary to discharge the refrigerant in
the unit, recovering it in adequate cylinders. Then vacuum
until you reach a pressure of about 6 Pa to remove any
trace of humidity from the circuit. Then load the unit with a
small amount of refrigerant and fill oil from the proper
connection for refilling.
Add oil until the oil sight glass is flat within the upper and
lower limits indicated by the corresponding notches. At
this point refill the previously discharged amount of
refrigerant as in the indications above. Restart the
compressor. Run for 20 minutes at full load and check the
If available
oil level.
Power supply to the auxiliary circuit
The power supply to the auxiliary circuit is 220V for all the units. Connection to the power circuit is inside the panel and is
carried out in the factory. The compressor oil heaters, the protections against compressor over temperature and the
cooling water safety indicator are connected so as to always be operative, as long as the electrical panel is power sup-
plied
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