Boiler circulator
55
Greenstar FS/Combi FS – 6 720 810 590 (2020/04)
10 Boiler circulator
10.1 Pump anti-seize protection
This function prevents the heating zone pump from seizing up following
longer idle periods.
The appliance will briefly run the pump at least every 24 hours after its
last activation.
10.2 Changing the pump curve of the boiler pump
The speed of the boiler pump can be changed using the dial on the pump.
Fig. 68 Pump curve of the boiler pump heating boiler KBR..-3A
Fig. 69 Pump curve of the boiler pump combi boiler KWB..-3A
Key to figures 68 and 69:
[1] Residual head pressure at speed 1
[2] Residual head pressure at speed 2
[3] Residual head pressure at speed 3 (default setting)
[4] Head pressure of the boiler pump by itself (at speed 3)
H Head pressure in feet of head (m)
V Circulating water volume in gallons per minute (l/h)
In order to save as much energy as possible and keep any water
circulation noises to a minimum, select the lowest possible pump speed.
02 5781436
15
20
25
10
5
0
H / ft
.
V / gpm
1
2
3
4
400 800 1200 1600200 600 1000 1400
7
0
6
5
4
3
2
1
0
H / m
.
V / l/h
6 720 641 933-59.1O
1
2
3
4
0213546 87
15
20
25
10
5
0
H / ft
.
V / gpm
1
2
3
4
400 800 1200 1600
7
0
6
5
4
3
2
1
0
H / m
.
V / l/h
6 720 641 933-61.1O
1
2
3
4
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