High Efficiency Pump Function Description - Wolf CGB-2 Series Installation Instructions For Contractors

Residual head of the high efficiency pump (EEI ≤ 0.23)
650
600
550
500
450
400
350
300
250
200
150
100
50
0
0 100
High efficiency pump function
description (EEI ≤ 0.23)
Operating setting
66
34. High efficiency 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 max. 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 and pump output are
regulated subject to the required heat load. Modulating the
pump reduces 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 heating load and power
consumption is not reduced.
The heating circuit pump does not modulate, it continuously
operates at the selected "DHW" pump speed.
(See table "Factory settings for pump speed".)
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
3064810_201804
100 %
46,6 W
1000