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e-MovAir-IOM-20.04-EN
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Power the compressors with the air handling unit turned off for at least 8 hours before the
start-up of the refrigerant section, in order to obtain the oil heating by mean of the internal
electric resistance inside the compressor.
•
Check the opening of the valves in the delivery or the aspiration of the compressor (if present).
•
Start-up the unit according to the specifics of the controller.
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Check the oil level from the proper control light.
•
Once the unit has been activated check the correct exchange between Freon/air and air/
water (if present water coils) by measuring the thermo-hygrometric conditions in the input
of the coil and in the air flow
7.0. GENERAL INFORMATION ON MAINTENANCE
BEFORE PERFORMING ANY MAINTENANCE OPERATIONS, MAKE SURE THAT THE MACHINE
IS NOT AND CANNOT BE ACCIDENTALLY POWERED. CONSEQUENTLY, THE POWER SUPPLY
MUST BE DISCONNECTED FOR ALL MAINTENANCE.
The purchaser is responsible for ensuring that all maintenance operations are performed.
The maintenance operations must be performed by trained and qualified personnel only.
ALWAYS USE WORK GLOVES TO PROTECT THE HANDS DURING THE MAINTENANCE
OPERATIONS.
The number and the frequency of the operations to be completed for the correct maintenance of the
air handling unit depends mainly on the quality of the fluids treated, that is, air and water.
The air may be particularly damaging if it contains significant amounts of pollutants or aggressive
substances:
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Industrial exhausts
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Salinity
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Chemical fumes
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Heavy dust
These substances, on coming into contact with the inside and outside surfaces of the unit, via the air
flow or by direct exposure, may over time and in the event of insufficient regular maintenance, cause
the structural and functional deterioration of the unit
8.0. MAINTENANCE INSTRUCTION
A chart should be prepared and filled in listing the procedures and the date of the inspections and the
regular maintenance operations.
The following is a list of the most important inspection and maintenance operations required, with
the corresponding typical frequency. It should be noted that the frequency of the operations depends
on the type of installation, and therefore must be evaluated by the maintenance personnel and, if
necessary, suitably increased according to the effective use of the unit.
The checks performed before starting the unit should also be repeated after each extended period of
inactivity.
9.0. TROUBLESHOOT
10.0. SERIOUS MALFUNCTIONING
These are failures of the refrigerating group and are signaled with various alarms levels up to the
e-MovAir-IOM-20.04-EN
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