Daikin EWWT100Q - Pressure; Temperature Table; Routine Maintenance; Electrical Maintenance; Service and Limited Warranty

D-EIMHP01702-23_00EN- 64/72
Pressure / temperature table
Table 6 – Pressure / Temperature of the R32
°C
Bar
°C
Bar
°C
Bar
°C
Bar
-28
2.97
-2
7.62
24
16.45
50
31.41
-26
3.22
0
8.13
26
17.35
52
32.89
-24
3.48
2
8.67
28
18.30
54
34.42
-22
3.76
4
9.23
30
19.28
56
36.00
-20
4.06
6
9.81
32
20.29
58
37.64
-18
4.37
8
10.43
34
21.35
60
39.33
-16
4.71
10
11.07
36
22.45
62
41.09
-14
5.06
12
11.74
38
23.60
64
42.91
-12
5.43
14
12.45
40
24.78
66
44.79
-10
5.83
16
13.18
42
26.01
68
46.75
-8
6.24
18
13.95
44
27.29
70
48.77
-6
6.68
20
14.75
46
28.61
72
50.87
-4
7.14
22
15.58
48
29.99
74
53.05
Routine maintenance
This chiller 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.
9.2.1 Electrical maintenance
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:
1. the current absorbed by the compressor must be compared to the rated value. Normally the value of the absorbed current is
lower than the rated value that corresponds to the absorption of the full load compressor at the maximum operating conditions.
2. at least once every three months all the security checks must be made to verify their functionality. Each appliance, with agi ng,
can change its point of operation and this must be monitored to adjust it or replace it. The pump interlocks and flow switches
must be checked to make sure that they interrupt the control circuit if they intervene.
9.2.2 Service and limited warranty
All the units are tested at the factory and guaranteed for a specific period of time.
These units have been developed and constructed according to high quality standards ensuring years of failure-free operation.
However, it is important to ensure proper and periodical maintenance in accordance with all the procedures listed in this manual
and with good practice of machines maintenance.
We strongly recommend stipulating a maintenance contract with a service authorized by the manufacturer. The experience and skill
of the personnel, in fact, can ensure an efficient operation without problems over time.
The unit must be covered by a suitable maintenance program from the time it is installed and not just from the start-up date.
Keep in mind that operating the unit in an inappropriate manner, beyond its operating limits or not performing proper maintenance
according to this manual will void the warranty.
Observe the following points in particular, in order to conform to warranty limits:
1. The unit cannot function beyond the specified limits
2. The electrical power supply must be within the voltage limits and without voltage harmonics or sudden changes.
3. The three-phase power supply voltage must not have an imbalance between the phases greater than 2% in accordance with
EN 60204-1:2006 (Chapter 4-Par.4.3.2).
4. In case of electrical problems, the unit must remain
5. off until the problem has been solved.
6. Do not disable or cancel the safety devices,
7. whether mechanical, electrical or electronic.
8. The water used for filling the water circuit must be clean and suitably treated. A mechanical filter must be installed at the
point closest to the evaporator inlet.
9. Unless specifically agreed at the time of the order, the flow of water of the evaporator must never exceed 120% or be below
80% of the nominal capacity and in any case within the limits provided in this manual.