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System Layout 9
Vitodens 200 (model WB2 11-44 and up) with...
– DHW storage tank
– two heating circuits with a mixing valve
AV
PRV
TPV
P
5
O
Q
Installation of different heating circuits...
H radiator heating circuit
H underfloor heating circuit with 3-way
mixing valve (low temperature circuit)
H DHW production
...with the following flow conditions
1. The total flow rate of the two heating
circuits is greater than the maximum
possible flow rate of the Vitodens 200 (see
following table).
2
H1
M
~
I
5
Model No.
Vitodens 200,
WB2 11-44
WB2 15-60
The use of a low-loss header is therefore
recommended.
The low-loss header is available as
accessory part.
See page 29 in this manual for details on
the low-loss header.
AV Air vent
PRV Pressure relief valve
1
TPV Temperature and pressure relief
valve
R
Vitodens 200 gas-fired condensing
boiler with Comfortrol programming
unit for weather-responsive
operation with 2-wire BUS expansion
module
Outdoor temperature sensor
2
Remote control for Comfortrol
programming unit
Primary pump (boiler circuit, field
H2
supplied)
Underfloor heating circuit
M
~
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
Vitotronic 050/Dekamatik-HK1 control
with communication module
Low-loss header
Temperature sensor for low-loss
header
DHW circulating pump (field supplied)
O
DHW storage tank
P
DHW tank temperature sensor
Q
Expansion tank
R
Vitotrol 200 remote control
The 3-way mixing valve, built-in to achieve
Max. flow rate
the low temperature level of the underfloor
(GPM/ltr/h)
heating circuit, is controlled by an accessory
kit for a heating circuit with mixing valve.
15.4/3500
15.4/3500
The underfloor and radiator heating circuits
are supplied by circulation pumps installed
on site which are controlled by the
accessory kit or the Vitotronic 050/
Dekamatik-HK1 control.
If more than two heating circuits with
mixing valves are to be connected, they can
be controlled by the Vitocontrol.
Contact your local Viessmann Technical
Sales Representative for details.
The DHW circulating pump is field supplied.
Installation Examples
41
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