Viessmann WB2B 45 - System Layout 5

Boiler Connections
33
Installation Examples (continued)
System layout 5
Vitodens 200-W, WB2B with...
– DHW storage tank
– one heating circuit with mixing valve
– one heating circuit without mixing valve and with low-loss header
Legend
AV Air vent (WB2B models 45, 60)
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)
Under floor heating circuit
Radiator heating circuit
Heating circuit pump
20A
*
F1
Heating circuit pump
Mixing valve temperature sensor
Kit for heating circuit with mixing valve
I
Domestic hot water storage tank
J
DHW tank temperature sensor
Expansion tank
Optional purge tee (field supplied)
DHW supply and return piping
DHW circulating pump sK*
O Power/Pump module
P Boiler pump sÖ*
Q DHW circulating pump sA*
R Low-loss header
S Viessmann temperature sensor for
low-loss header
T Flow check valve
* See pages 53 and 57.
Installation of different heating circuits...
H radiator heating circuit (high-temp. circuit)
H under floor heating circuit with 3-way
mixing valve (low-temp. circuit)
H DHW production
... with the following flow conditions:
The total flow rate of the two heating
circuits 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. The low-loss header is
available as accessory part.
The 3-way mixing valve, built-in to achieve
the low-temperature level of the under floor
heating circuit, is controlled by an accessory
kit for a heating circuit with mixing valve.
Please note location of expansion tank
and flow check valve T.
DHW circulating pump Q must pump into
the Vitodens 200-W WB2B boiler (as
illustrated).
5418 909 v1.6
PRV
TPV
A
B
C
K
M
D
E
F
H
L
N
O
T
AV
5
1
2
5
G
I
R
Q
M
P
S
F1
Fig. 27
J
IMPORTANT
IMPORTANT