9 Maintenance
9.1 General description
Maintenance must be done by authorized centres or by qualified personne
l
.
The maintenance allows to:
•
maintain the unit efficie
ncy
•
increase the life span of the equipment
•
assemble information and data to understand the state of the unit efficie
nc
y and avoid possible damages
Before checking, please verify the following:
•
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 off the p
o
wer, 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.
9.2 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)
1
6
12
1
presence corrosion
X
2
panel fixing
X
3
4
5
water filter cleaning
X
6
water: quality, ph, weight of glycol (%)
X
7
check the exchanger efficiency
X
8
circulating pumps
X
9
check of the fixing and the insulation of the power lead
X
10
check of the earthing cable
X
11
electric panel cleaning
X
12
capacity contactor status
X
13
termina closing, cable insulation integrity
X
14
voltage and phase unbalancing (no load and on-load)
X
15
absorptions of the single electrical loads
X
16
test of the compressor crankcase heaters
X
17
Checking for leaks
*
18
survey of the refrigerant circuit operating parameters
X
19
safety valve
*
20
protective device test: pressure switches, thermostats, flow switches etc..
X
control system test: setpoint, climatic compensations, capacity stepping, water / air flow-rate variations
X
control device test: alarm signalling, thermometers, probes, pressure gauges etc..
X
* Refer to the local regulations; and ensure correct adherance. Companies and technicians that effect interventions of installation, maintenance/re-
pairs, leak control and recovery must be CERTIFIED as expected by the local regulations. The leak control must be effected with annual renewal.
46
Summary of Contents for MSE-XSC3 100.4
Page 1: ...MSE XSC3 90 4 160 4 Installation and operating manual...
Page 3: ...Index of contents 1 4 2 6 3 8 4 10 5 14 6 18 7 26 8 35 9 47 10 52 11 53 12 54 57 3...
Page 19: ...Connections performed by the Customer 19...
Page 50: ...9 15 Compressor replacement 50...
Page 51: ...9 16 Exchanger replacement 51...
