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e-MovAir-IOM-20.04-EN
VENTILATING SECTION
Before performing any operations on the motor-fan assembly, check that the
power supply has been disconnected.
Fan
With the fan off, check that the fan impeller is centred on the shaft, that the blades
do not rub on the scroll and that the blades are securely fastened and do not
vibrate.
The above-mentioned phenomena may appear over time due, for example, to the
unintended presence of metal residues in the ducting or the natural loosening of
the fastening bolts.
The checks can be performed by turning the impeller manually.
The ball bearings used on the smaller standard fans are self-aligning radial bearings,
with lifetime seal and lubrication, and consequently do not require maintenance.
Their theoretical life, in normal operating conditions, is around 20,000 hours.
VARIOUS CHECKS
Check the condition of the electrical cables.
Check that the vibration damping supports, the panels and the inspection doors
do not allow the air to leak.
Check for any water leaks from the tanks and the supply pipes.
REFRIGERANT CIRCUIT SECTION
Check the level of the refrigerant gas controlling the evaporative pressures and the
condensation pressures of the circuit in summer and winter mode (heat pump).
Check the proper operations of the carter resistances for each compressor.
Check the proper operations of the pressure switch for the high pressure and the
low pressure.
Take care of the filters cleaning (if any) and of the condensation coils.
List of the suggested maintenance operations/controls and their frequency:
•
Cleaning of the internal and external coils
•
Cleaning of the elicoidal fans
•
Cleaning of the centrifugal fan
•
Control of the piping and their supports
•
Control of the insulation of the piping
•
Control of the level of the refrigerant gas through the verification of the
proper operating pressures
•
Control of the oil level on the proper warning light both with the
compressors turned off and with the compressors switched on
•
Control of the electrical terminals on the control panel, tightened terminals
•
Control alarms and blocks (alarm list on the PLC)
•
Control of the remote signals
•
Control of the solenoid coils
•
Control of the air filters
•
Control of the bearings
•
Control of the electrical absorption of the compressors
•
Controls of the operations of the carter resistors for each compressor
•
Control of the electrical absorption of the fans
•
Control of the voltage supply of the unit
e-MovAir-IOM-20.04-EN
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