Heating Circuit Pump Function Description - Wolf CGS-2-14/120L Installation Instructions Manual

Residual head of the high efficiency pump (EEI ≤ 0.23)
650
600
550
500
450
400
350
300
250
200
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50
0
0 100
High efficiency pump function
description (EEI ≤ 0.23)
Operating setting
3064816_201804
33. Heating circuit pump function
description
20 % 30 %
40 %
2,8 W 4,5 W
6,5 W
200 300 400
Pump rate in [l/h]
Heating mode
DHW mode
Standby mode
The pump control can be set with parameter HG37.
50%
60 %
10 W
14,5 W
500 600
Fördermenge in [l/h]
3 operating modes are possible with the modulating
heating circuit pump:
1. Pump speed linear to burner output (Linear)
The heating circuit pump modulates in proportion to the
burner output, i.e. for maximum burner load the pump
will run at the maximum set pump speed for "heating
mode"; for minimum burner output at the minimum set
pump speed for "heating mode". In other words, the
burner output and pump rate are regulated subject to the
required heat load. Modulating the pump reduces the
power consumption.
2. Spread control (dT)
This type of control aims to utilise the condensing effect
as fully as possible while minimising the electrical energy
required by the pump. This is achieved by constantly
maintaining a prescribed spread.
3. Fixed speed setting (Constant)
The heating circuit pump runs at the fixed set speed, both
for minimum and maximum burner output. The pump rate
is not controlled in relation to the required heat load and
the power consumption is not reduced.
The heating circuit pump does not modulate, it
continuously operates at the selected "DHW" pump
speed. (See table)
The pump does not run when the boiler is in standby
mode.
70% 80 %
90 %
21,1W 29,5 W 40,6 W
700 800 900
100 %
46,6 W
1000
65