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14.
MAINTENANCE
14.1 Routine maintenance
This unit must be maintained by qualified technicians. Before beginning any work on the system, the personnel shall
assure that all security precautions have been taken.
Neglecting unit maintenance could degrade all parts of the units (compressors, frames , pipes, etc.) with negative effect
on performances and functionality.
There are two different levels of maintenance, which can be chosen according to the type of application
(critical/noncritical) or to the installation environment (highly aggressive).
Examples of critical applications are process cooling, data centres, etc.
Highly Aggressive Environments can be defined as follows:
• Industrial environment (with possible concentration of fumes result of combustion and chemical process).
• Coastal environment.
• Highly polluted urban environment.
• Rural environment close to of animal excrement and fertilizers, and high concentration of exhaust gas from diesel gener-
ators.
• Desert areas with risk of sandstorms.
• Combinations of the above.
• Unit exposed to a highly aggressive environment can face corrosion in a shorter time than ones installed on a
standard environment. Corrosion causes a rapid rusting of the frame core, consequently, decreases unit structure
lifetime. To avoid that, it is necessary to wash periodically the frame surfaces with water and suitable detergents.
• In case of part of unit frame paint came off, it is important to stop its progressive deterioration by repainting the
exposed parts using proper products. Please contact the factory to get the required products specifications.
• In case of just salt deposits are present, it is enough to rinse the parts with fresh water.
All electrical maintenance activities must be performed by qualified personnel. Make sure the system is switched
off and the main switch of the unit open. Failure to observe this rule could result in serious personal injury. When
the unit is turned off, but the disconnection switch is in the closed position, the unused circuits will still be active.
The maintenance of the electrical system consists of the application of some general rules as follows:
the current absorbed by the compressor must be compared to the rated value. Normally the value of the absorbed current
1.
Table 6-R410A Pressure / temperature table
°C
Bar
°C
-13
5.22
14
-12
5.41
15
-11
5.60
16
-10
5.79
17
-9
6.00
18
-8
6.20
19
-7
6.42
20
-6
6.63
21
-5
6.86
22
-4
7.09
23
-3
7.32
24
-2
7.56
25
-1
7.81
26
0
8.06
27
1
8.32
28
2
8.59
29
3
8.86
30
4
9.14
31
5
9.42
32
6
9.71
33
7
10.01
34
8
10.32
35
9
10.63
36
10
10.95
37
11
11.27
38
12
11.61
39
13
11.95
40
Bar
°C
Bar
12.30
41
24.95
12.65
42
25.56
13.02
43
26.18
13.39
44
26.81
13.77
45
27.45
14.15
46
28.10
14.55
47
28.77
14.95
48
29.44
15.37
49
30.13
15.79
50
30.84
16.22
51
31.55
16.65
52
32.28
17.10
53
33.02
17.56
54
33.78
18.02
55
34.55
18.49
56
35.33
18.98
57
36.13
19.47
58
36.95
19.97
59
37.78
20.48
60
38.62
21.01
61
39.48
21.54
62
40.36
22.08
63
41.25
22.63
64
42.16
23.20
65
43.09
23.77
66
44.04
24.36
67
45.01
D-EIMHP01501-22_01EN 13/20
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