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10 LIST OF THE RECOMMENDED PERIODIC INTERVENTIONS
General interventions
DESCRIPTION FREQUENCY
Note
3/4 Mths 6 Mths 12 Mths 24 Mths
GENERAL INTERVENTIONS
Refrigerant leak control (this operation must be performed with the frequency suggested by current European regulations) •
Unit supply voltage control •
Compressor supply voltage control •
Fan supply voltage control, if applicable •
Solenoid valve control •
Pressure switch operation and calibration control, if applicable •
Safety valve replacement •
Pressure/temperature probe control and reading •
Control and replacement, if necessary, of the lter driers •
Compressor contactor control •
Fan contactor control, if applicable •
Heat exchanger coil cleaning (preferably from the inside towards the outside) •
Leak detector control 1) • •
Heat exchanger electric heater control •
Check for the presence of rust or signs of corrosion in the components, paying particular attention to pressurised containers. In
that case, replace them or use specic products
• •
General unit cleaning •
Vent the hydraulic circuit and the heat exchangers, the coexistence of air and water reduces performance and can promote the
formation of rust
(1) For the device maintenance policies and the correct execution of the calibration procedures, please refer to the leak detector user manual available on the manu-
facturer’s website or contact AERMEC.
Calibration is to be performed after 6 months after starting the system, then every 12 months. Alternatively, a pre-calibrated sensor can be ordered as a spare and replaced
according to the instructions in the leak detector manual.
The typical operational life of the sensor is 4 years, then it must be replaced.
WARNING: The detection elements of the semiconductors must be checked after exposure to signicant gas concentrations, which can shorten the duration of
the sensor and/or reduce its sensitivity.
Interventions on the circuit
DESCRIPTION FREQUENCY
3/4 Mths 6 Mths 12 Mths 24 Mths
INTERVENTIONS ON THE COOLING CIRCUIT OPERATING WITH FULL LOAD
Measurement of the overheating temperature •
Measurement of the undercooling temperature •
Measurement of the exhaust gas temperature •
Measurement of fan input •
Measurement of compressor input •
COMPRESSOR CONTROLS
Oil level control •
Oil acidity control •
Control of proper operation of the carter heater •
Control of the oil level sensor, if present •
HYDRAULIC CIRCUIT CONTROLS
Measurement of pump input •
Control of pump rotor gaskets •
Control of exible joints •
Control of the seal of the tube core exchanger heads •
Control of the proper operation and calibration of the ow switch, if present •
Control of the proper operation of the dierential pressure switch, if present •
Control the concentration of the glycol solution, if applicable 1) 3 Mths
Cleaning the water lter •
(1) If the glycol must be changed, refer to the documentation provided by the supplier.
The frequency of the operations described here is only approximate, they can vary based on how the unit is used and the type of system where it is installed. If the unit is installed in aggressive envi-
ronments, we recommend reducing the intervention times.
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