Bosch KBR42-3 - 10 Boiler Circulator; Pump Anti-Seize Protection; Changing the Pump Curve of the Boiler Pump

Boiler circulator | 55
6 720 810 590 (2015/05)
Greenstar FS
10 Boiler circulator
10.1 Pump anti-seize protection
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. 66 Pump curve of the boiler pump heating boiler
KBR..-3A
Fig. 67 Pump curve of the boiler pump combi boiler
KWB..-3A
Key to Fig. 66 and Fig. 67:
[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)
Circulating water volume in gallons per minute (l/h)
This function prevents the heating zone pump from
seizing up following longer idle periods.
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
In order to save as much energy as possible and keep any
water circulation noises to a minimum, select the lowest
possible pump speed.
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
V