M08P40G16-00 WSH-XEE2 10.2-120.2 37
8 Maintenance
8.1 General description
Maintenance must be done by authorized centres or by qualied personnel.
The maintenance allows to:
•
maintain the unit eciency
•
increase the life span of the equipment
•
assemble information and data to understand the state of the unit eciency and avoid possible damages
Before checking, please verify the following:
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the electrical power supply line should be isolated at the beginning
•
the unit isolator is open, locked and equipped with the suitable warning
•
make sure no tension is present
After turning o the power, wait at least 5 minutes before accessing to the electrical panel or any other electrical component.
Before accessing check with a multimeter that there are no residual stresses.
8.2 Inspections frequency
Perform an inspection every 6 months minimum.
The frequency, however, depends on the use.
In the event of frequent use it is recommended to plan inspections at shorter intervals:
•
frequent use (continuous or very intermittent use, near the operating limits, etc)
•
critical use (service necessary)
√ intervention frequency (months) 1612
1 presence corrosion X
2 panel xing X
3 water lter cleaning X
4 water: quality, ph, weight of glycol (%) X
5 check the exchanger eciency X
6 circulating pumps X
7 check of the xing and the insulation of the power lead X
8 check of the earthing cable X
9 electric panel cleaning X
10 capacity contactor status X
11 termina closing, cable insulation integrity X
12 voltage and phase unbalancing (no load and on-load) X
13 absorptions of the single electrical loads X
14 test of the compressor crankcase heaters X
15 Checking for leaks *
16 survey of the refrigerant circuit operating parameters X
17 safety valve *
18 protective device test: pressure switches, thermostats, ow switches etc.. X
19 control system test: setpoint, climatic compensations, capacity stepping, water / air ow-rate variations X
20 control device test: alarm signalling, thermometers, probes, pressure gauges etc.. X
* Refer to the local regulations; and ensure correct adherance. Companies and technicians that eect interventions of installation, maintenance/re-
pairs, leak control and recovery must be CERTIFIED as expected by the local regulations. The leak control must be eected with annual renewal.
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