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Installation Examples
System Layout 8
Vitodens 200 (model WB2 11-44 and up) with...
– DHW storage tank
– low-loss header
– one heating circuit with mixing valve
AV
PRV
TPV
O
Y
P
Please note!
The use of a low-loss header is
recommended if the water flow rate is less
than 1.3 GPM / 300 ltr/h or more than 15.4
GPM / 3500 ltr/h.
The low-loss header is available as
accessory part.
See page 29 in this manual for details on
the low-loss header.
Model No.
Max. flow rate
(GPM/ltr/h)
Vitodens 200,
WB2 11-44
15.4/3500
WB2 15-60
15.4/3500
40
H1
M
~
I
The radiator heating circuit is supplied by a
circulation pump (field supplied). An
expansion board (optional) must be ordered
from Viessmann to control this pump.
The underfloor heating circuit is supplied by
a circulation pump installed on site which is
controlled by the accessory kit.
The DHW circulation pump is field supplied.
AV Air vent
PRV Pressure relief valve
TPV Temperature and pressure relief
valve
Vitodens 200 gas-fired condensing
boiler with Comfortrol programming
unit for weather-responsive
operation
Outdoor temperature sensor of
control unit for weather-responsive
operation
Remote control
Primary pump (boiler circuit, field
supplied)
H2
Underfloor heating circuit
Radiator heating circuit
Mixing valve temperature sensor
Heating circuit pump (field supplied)
H1
Heating circuit pump (field supplied)
H2
I
Accessory kit for heating circuit with
mixing valve
Low-loss header
Temperature sensor for low-loss
header
DHW circulating pump (field supplied)
DHW storage tank
O
DHW tank temperature sensor
P
Expansion tank
IMPORTANT
Pumps
and
must pump into the
Vitodens 200 boiler (as illustrated).
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