52
3061344_201509
Modulating pump (class A)
Function description
modulating pump
(modulating pump not for 24 kW)
(class A)
In heating mode:
The heating circuit pump modulates in proportion to the burner
output, i.e. at max. burner load, the pump operates with the
maximum selected pump speed for „Heating mode“. At minimum
burner load, the pump operates with the minimum selected pump
speed for „Heating mode“. In other words, the burner and pump
output are regulated subject to the required heating load. The
power consumption is reduced by the pump modulation.
In DHW mode:
The heating circuit pump will not modulate, but operates con-
stantly with the selected „DHW“ pump speed (see table).
In standby mode:
The heating circuit pump operated with the selected „Standby
mode“ pump speed.
Factory settings
„Pump speed“
Boiler
Heating mode
DHW
Standby
Max.
Min.
CGB-11
56 %
27 %
56 %
20 %
CGB-(K)-20
77 %
48 %
74 %
20 %
CGB-(K)-24
82 %
48 %
90 %
20 %
Residual height of the modulating pump (class A)
Residual height in mbar
Flow rate in l/h
0
50
100
150
200
250
300
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
Fördermenge [l/h]
R
es
tför
de
rhöhe
in
[m
ba
r]
27 %
10W
74 %
43W
82 %
51 W
20 %
9 W
77%
44W
100 %
69 W
56 %
25W
48 %
20W
90 %
65W
