Unit Operation; Operator Responsibilities - Trane CGCN Installation Operation & Maintenance

Unit operation

Operator responsibilities

It is important that the operator is properly trained and become familiar with the equipment before working on the
unit. In addition to reading this manual, the operator must study the manual operation of the microprocessor and
the wiring diagram to understand the sequence of start-up, operation, shutdown sequences, and the criterion of
operation of all safety devices. During the initial start-up of the unit an authorized technician is available to answer
any questions and educate on the proper functioning. We recommend the operator to maintain a record of the
operating data for each unit installed Moreover, another record should be maintained for all maintenance activities
and periodic service. If the operator checks abnormal or unusual operating conditions, it is recommended to
consult the authorized technician.
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
oil level.