Trane CXAO Installation Operation & Maintenance page 34

Oil compressor load
Resistance is not have direct contact with the oil, its
possible repositioning is made extremely easy. The
heating of the oil is necessary in all cases:
- Compressor Downtime
- Danger of condensation of the refrigerant inside the
compressor
- High refrigerant charge
- Installations in cold environments
At the fi rst start-up and subsequent closure period starts
after far the resistance should be on 24 hours before
starting the compressor.
Lubricating monitoring
Flow switch
The control of the fl ow of oil in the internal circuit of the
compressor can be controlled by the fl ow switch through
Oil Compressor temperature control
The compressors are fi tted with a device for monitoring
the oil temperature. The compressors are designed
to monitor the correct oil temperature through a PTC
sensor installed directly into the cup of oil.
A special protection of the compressor in addition to
monitoring the temperature of the electric motor and
the oil (T. outlet), through the proper operation of the
thermistor chain, the verifi cation module:
34
a pair of connections the fl ow switch is connected to the
oil circuit and monitors signaling the actual passage of
oil in the circuit irrespective of the quantity of oil in the
sump. Connected in series with the chain of alarms, this
device provides a high degree of safety to the operation
of the compressor.
• Calibration set to 4 liters / min
• Contact type reel (electromagnetic), open contact
on the correct fl ow, fl ow properly closed contact
• It is necessary that the fl ow switch has the
appropriate delays (not supplied by the
manufacturer)
- In Ignition (between 10 and 20 seconds)
- In operation (5 seconds)
• The presence of the phases
• The direction of rotation at start
• The start-up delay (5 minutes) in the case of
motor overheating
• The maximum number of starts per hour (10 in a
rolling window of 60 minutes)
RF-SVX003A-GB