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Residual head of the high efficiency pump (EEI ≤ 0,20)
800
700
600
500
400
300
200
100
0
0
200
High efficiency pump function description (EEI ≤ 0,20)
Possibilities
Operating setting
58
26. High efficiency pump function
description
40 %
400
600
Pump rate in [l/h]
Heating mode
2 operating modes are possible with the modulating
heating circuit pump:
1. Spread control (ΔT)
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.
2. 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 subject to the required heat-
ing load and power consumption is not reduced.
DHW mode
The heating circuit pump does not modulate, it continu-
ously operates at the selected "DHW" pump speed. (See
table "Factory settings for pump speed".)
Standby mode
The pump does not run when the boiler is in standby
mode.
The pump control can be set with parameter H37.
60 %
50 %
800
1000
1200
Overflow valve
450 mbar
100 %
90 %
80 %
70 %
1400
1600
3064458_201811
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