Viessmann B2HF - Adjusting the pump rate of the integral circulation pump

50
Operation of the integral circulation pump as heating circuit pump for heating circuit 1
The pump speed and consequently the pump rate are
controlled subject to the outside temperature and the
switching times for heating mode or reduced mode.
The minimum and maximum speeds for heating mode
can be matched to the existing heating system at the
control unit.
Speed in %
100
+20 -20
Outside temperature in °C
-30+30
Min
Max
Fig. 35
Setting (%) in Heating circuit 1 group:
■
Min. speed: Parameter 1102.0
■
Max. speed: Parameter 1102.1
■
In the delivered condition, the minimum pump rate
and the maximum pump rate are set to the following
values:
Rated heating output
in kW
Speed settings in the
delivered condition in %
Min. pump
rate
Max. pump
rate
11 60 60
19 60 65
25 60 75
32 60 100
■
In the following system conditions, the internal circu-
lation pump is operated at a constant speed:
–
Low loss header or heating water buffer cylinder
and heating circuits with mixer
–
Continuous operation
Speed setting (%): Parameter 1100.2 in the Boiler
group
Commissioning, inspection, maintenance
Adjusting the pump rate of the integral circulation pump
5593201