Viessmann VITODENS 200-W Type B2HA Technical Manual page 16

Vitodens 200-W
When balancing the low loss header, adjust the flow rate on the
boiler side (V primary A) to approx. 10 to 30 % below the flow rate
on the system side (V secondary B) (reducing the return tempera-
ture).
1
The low loss header separates the heat generator circuit (boiler cir-
cuit) from the subsequent heating circuits.
100%
130%
B
130%
A V primary
B V secondary
Adjust the functioning of the primary side circulation pump during commissioning
Hydraulic connection/connection requirements
Single boiler system
Connection of heating circuits with connection set with inte-
gral low loss header
Circulation pump VI PARA 25/1-11
Pressure drop on the heating water side
For sizing a cylinder loading pump (on site)
VIESMANN
16
(cont.)
100%
A
High efficiency circulation pump in the heating circuit connec-
tion set (accessories)
The highly efficient circulation pump uses significantly less power
compared to conventional pumps.
Matching the pump rate of the circulation pump to the individual sys-
tem conditions reduces the power consumption of the heating sys-
tem.
Circulation pump VI PARA 25/1-11
Rated voltage
Power consumption
– max.
– min.
Control unit setting
Coding address/group
30:0/boiler/2
V~
W
W
Circulation pump setting
Ext. In
2 2
6 6
12 12
Recommendation
– 80 kW (Δt = 16 K):
≙ 4.03 m
3 /h
– 99 kW (Δt = 20 K):
≙ 4.02 m
3
/h
VITODENS 200-W
230
140
8
= 6
= 6