38
■
In the delivered condition, the minimum pump rate
and the maximum pump rate are set to the following
values:
Rated heating output
in kW
Speed settings in the de-
livered condition in %
Min. pump
rate
Max. pump
rate
19 40 100
25 40 100
■
In the following system conditions, the internal circu-
lation pump is operated at a constant speed:
–
Constant operation
Residual head of integral circulation pump
Residual head
0
kPa
0 200 400 600 800 1000
Flow rate in l/h
100
200
300
400
0
10
20
30
40
500
50
mbar
1200100 300 500 700 900 1100
5
50
150 15
250 25
350 35
450 45
600
550 55
60
C
D
E
F
G
H
B
A
K
L
Fig. 26
Curve Pump rate of circulation pump
A
10 %
B
20 %
C
30 %
D
40 %
E
50 %
F
60 %
G
70 %
H
80 %
K
90 %
L
100 %
Commissioning, inspection, maintenance
Adjusting the integral circulation pump rate (cont.)
6179762
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