Boiler Circulator; Pump Anti-Seize Protection; Changing The Pump Curve Of The Boiler Pump - Bosch ZBR16-3A Series Installation And Service Instructions Manual

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.
25
20
15
10
1
5
0
0 1 2 3
V / gpm
7
6
5
4
3
1
2
1
0
0 200 400 600
Fig. 72 Pump curve of the boiler pump heating boiler
ZBR..-3A
Greenstar
4
3
2
4 5 6 7 8
.
4
3
2
800 1000 1200 1400 1600
.
V / l/h
6 720 641 933-59.1O
25
20
15
10
5
0
0 1 2 3
7
6
5
4
3
2
1
0
0 400
Fig. 73 Pump curve of the boiler pump combi boiler
ZWB..-3A
Key to Fig. 72 and Fig. 73:
[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.
Boiler circulator | 57
4
3
2
1
4 5 6 7 8
.
V / gpm
4
3
2
1
800 1200 1600
.
V / l/h
6 720 641 933-61.1O
6 720 806 992 (2015/03)