Technical data

Boiler Connections
30
Installation Examples (continued)
System layout 2
Vitodens 200-W, WB2B with a direct-connected heating circuit and low-loss header
Legend
AV Air vent (models WB2B 19, 26, 35)
PRV Pressure relief valve
TPV Temperature and pressure relief valve
Vitodens 200-W WB2B boiler with
Vitotronic 200, HO1 outdoor reset
control
Outdoor temperature sensor
Remote control Vitotrol 300 (optional)
Heating circuit
Boiler pump sÖ*
DHW circulating pump sA*
DHW storage tank
DHW tank temperature sensor
I
Expansion tank
J
Flow check valve
DHW recirculation pump sK*
Power/Pump Module
M Low-loss header
N Optional purge tee (field supplied)
O Viessmann temperature sensor for
low-loss header
P Heating circuit pump
20A
*
* See pages 52 and 56.
Installation of ...
H radiator heating circuit (high-temp. circuit)
H DHW production
... with the following flow conditions:
The flow rate of the heating circuit is
greater than the maximum possible water
flow rate of the Vitodens 200-W WB2B
boiler (see page 28 for maximum water flow
rate of boiler).
The use of a low-loss header is strongly
recommended if the maximum water flow
rate in the application concerned exceeds
the values shown on page 28, or if the
system flow rates are unknown.
The low-loss header is available as
accessory part.
Please note location of expansion tank
I
and flow check valve
J
.
DHW circulating pump must pump into
the Vitodens 200-W WB2B boiler (as
illustrated).
5369 297 v1.6
1
PRV
TPV
5
A
B
C
K
M
D
E
F
G
H
L
N
O
AV
5 J
I
P
Fig. 24
IMPORTANT
IMPORTANT