Routine Maintenance; Electrical Installation; Table 8-R410A Pressure / Temperature Table - Daikin EWLQ025KCW1N Installation, Operation And Maintenance Manual

13 MAINTENANCE
13.1

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 (coils, 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 the 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
generators.
• 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 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.
13.2

Electrical Installation

All electrical maintenance activities must be followed 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:

Table 8-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
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