Trane Flex II Series Installation Operation & Maintenance page 33

13.2 STARTING UP
All the compressors are factory charged with oil whose chemical characteristic of stability are very good, so it is not
necessary to change frequently the lubricant oil.
The scroll compressors are equipped with an oil sight glass from which you can control the level. 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. Units use POE oil.
In case of burns for the electrical motor or fault of the compressor, it is necessary to make a test to check the acidity of
the lubricant oil and, eventually, clean the circuit to reduce the acidity to correct values, mounting for instance an
antiacid filter and changing the oil in the circuit.
13.3 WARM UP OF THE PLANT
In order to keep all the machine components in good condition and to optimise their use, during the warm up it is necessary
to bring the circuit to the right temperature before releasing cooling energy to the utilities.
The following steps must be followed for this to be carried out:
•
start up the machine
•
wait for the water in temperature to reach the running temperature
•
start up the consumers
Follow the above mentioned procedure every time the plant is stopped long enough for the water temperature contained
in it to rise.
13.4 CONTROL OF THE OIL CHARGE
All the compressors mounted on Trane units are factory charged with oil whose chemical characteristic of stability are
very good, so it is not necessary to change frequently the lubricant oil.
The scroll compressors are equipped with an oil sight glass from which you can control the level. 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.
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