Maintenance - List Of The Recommended Periodic Interventions - AERMEC WRL 200 Installation Manual

MAINTENANCE - LIST OF THE RECOMMENDED PERIODIC INTERVENTIONS

MAINTENANCE - LIST OF THE RECOMMENDED
PERIODIC INTERVENTIONS
DESCRIPTION
Check of any refrigerant leaks (this must be done respecting the deadlines recom-
mended by the current European regulations)
Check of the unit power supply voltage
Check of the compressors' power supply voltage
Check of the fan power supply voltage if present
Check of the solenoid valves
Functioning and calibration check of the pressure switches, if and where present
Check and reading of the pressure/temperature probes
Check and possible replacement of the dehydrating fi lters
Check of compressors contactors
Check of fans contactors, where present
Exchanger coils cleaning (preferably from the inside to the outside)
Check and cleaning of shell and tube heat exchangers if necessary where present
Check of electric resistances of the heat exchangers
Check for rust and corrosion in components, paying particular attention to under
pressure containers. In this case replace them of intervene with specifi c products
General cleaning of the unit
Bleed the hydraulic circuit and the heat exchangers, the simultaneous presence of air
and water reduces yield and can benefi t the arising of rust
Overheating temperature measurement
Subcooling temperature measurement
Exhaust gas temperature measurement
Fans absorption measurement
Compressors absorption measurement
Check oil level
Check oil acidity
Check the proper functioning of the casing resistance
Check oil level sensor, if any
Pumps absorption measurement
Check the pump rotor gasket
Check the fl exible joints
Check the seal of the shell and tube heat exchanger heads, where present
Check the proper functioning and calibration of the fl ow switch, where present
Check the proper functioning of the diff erential pressure switch, where present
Check the concentration of glycol solution, if provided
Cleaning the water fi lter
1 we do not recommend swabbing as it can ruin the inner lining of the
pipes, we recommend using appropriate chemicals.
* To replace the glycol, refer to the documentation provided by the
supplier.
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RECOMMENDED PERIODIC MAINTENANCE INTERVENTIONS
GENERAL INTERVENTIONS
INTERVENTIONS TO COOLING CIRCUIT Functioning at full load
COMPRESSOR CHECKS
CHECKS ON HYDRAULIC CIRCUIT
FREQUENCY
3/4 6 12
months months months
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3 months*
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The frequency of the operations described herein is a
guideline one and they may vary depending on how the unit
is used and the type of system where it is installed. However,
if the unit is installed in harsh environments, we recommend
reducing the time of intervention
24
functioning hours
months