INSTALLATION
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5
Figure 5-19. Example: PI-diagram of the cooling system and the connections
In tables below you will find the specifications related to the cooling agent and its circulation. See also on
page 25.
Min. liquid flow per
element (drive)
[dm
3
/min]
Nom. liquid flow per element
(drive)
[dm
3
/min]
Max. liquid flow per
element (drive)
[dm
3
/min]
Liquid volume/
element
[l]
Chassis
A
A
B
C
A
A
CH3
3 (3)
5 (5)
5,4 (5,4)
5,8 (5,8)
20 (20)
0.11
CH4
8 (8)
10 (10)
11 (11)
12 (12)
20 (20)
0.15
CH5
10 (10)
15 (15)
16 (16)
17 (17)
40 (40)
0.22
CH61
20 (20)
25 (25)
27 (27)
29 (29)
40 (40)
0.38
CH62
20 (20)
25 (25)
27 (27)
29 (29)
40 (40)
0.38
CH63
20 (40)
25 (50)
27 (54)
29 (58)
40 (80)
0.38
CH64
20 (60)
25 (75)
27 (80)
29 (86)
40 (120)
0.38
CH72
20 (20)
35 (35)
37 (37)
40 (40)
40 (40)
1.58
CH74
20 (60)
35 (105)
37 (112)
40 (121)
40 (120)
1.58
Table 5-6. Information about cooling agent and its circulation
A = 100% water; B = Water/Glycol mixture 80:20; C = Water/Glycol mixture (60:40)
Definitions:
Min liquid flow = Minimum flow rate to ensure of total venting of the cooling element
Nom liquid flow = Flow rate that allows running the drive at I
th
Max liquid flow = If flow rate exceeds max liquid flow, risk of cooling element erosion increases
Liquid ref temperature, input: 30ºC
Max temperature rise during circulation: 5ºC
Note: Unless minimum liquid flow rate is ensured, air pockets may develop in the cooling elements.
The following table will help you to determine the appropriate flows of cooling agent (l/min) with given
power losses (see chapter 4.2).
Cooling water inlet
Frequency converters
Cooling water outlet
