Draining The Cooling Circuit - Siemens SINAMICS S120 Manual
Cabinet modules liquid cooled
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- Function manual (1094 pages) ,
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Table 5- 7
Dew point temperature as a function of relative air humidity ϕ and room temperature at an installation altitude
of 0 m.
T room
φ=20%
φ=30%
[° C]
10
<0
<0
20
<0
2
25
0.6
6.3
30
4.7
10.5
35
8.7
14.8
38
11.1
17.4
40
12.8
19.1
45
16.8
23.3
50
20.8
27.5
The dew point also depends on the absolute pressure, i.e. the installation altitude.
The dew points for low atmospheric pressure are lower than those at an altitude of 0 m, i.e. it
is always acceptable to calculate the coolant supply temperature for an altitude of 0 m.
5.7
Draining the cooling circuit
To empty the internal deionized water circuit, the accessories pack for the electrical cabinet
includes a piece of hose and a quick-release coupling.
You can connect this hose to the lower water pipe (intake); this allows you to drain the
internal deionized water circuit to a very large extent.
Draining the internal deionized water circuit
1. At the shutoff valve (65.4) in the Heat Exchanger Module, connect a 1/2 "hose to drain
the coolant (for option W01, also at shutoff valve 65.5).
2. Remove the quick-release coupling at the intake to the internal deionized water circuit at
one of the points in the cabinet line-up opposite the Heat Exchanger Module.
3. Connect the hose with the quick-release coupling (from the accessory pack) at the intake
to the internal deionized water circuit.
4. Route the hoses to a suitable tank to drain the coolant.
5. Open all of the vent valves (at the power units and/or heat exchangers) and shutoff
valves (65.4, 65.5), and allow the coolant to drain.
6. At the filling connection points (65.1) of the Heat Exchanger Module, connect a hose with
dry compressed air with a maximum pressure of 6.0 bar.
7. Wait until coolant no longer drains from all of the hoses.
Cabinet Modules liquid cooled
Equipment Manual, 04/2020, A5E37067587A
φ=40%
φ=50%
φ=60%
<0
0.2
2.7
6
9.3
12
10.5
13.8
16.7
14.9
18.4
21.3
19.3
22.9
26
22
25.7
28.8
23.7
27.5
30.6
28.2
32
35.3
32.6
36.6
40
Commissioning the cooling circuit
φ=70%
φ=80%
φ=85%
4.8
6.7
7.6
14.3
16.4
17.4
19.1
21.2
22.2
23.8
26.1
27.1
28.6
30.9
32
31.5
33.8
34.9
33.4
35.8
36.9
38.1
40.6
41.8
42.9
45.5
46.6
5.7 Draining the cooling circuit
φ=90%
φ=95%
φ=100%
8.4
9.2
18.3
19.1
23.2
24.1
28.1
29
33
34
36
36.9
37.9
38.9
42.9
43.9
47.8
48.9
10
20
24.9
29.9
34.9
37.9
39.9
44.9
49.9
135
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