Viessmann Vitodens 200 WB2 Series Technical Data Manual page 44

Installation Examples
System Layout 7
Vitodens 200 (model WB2 11-44 and up) with...
– DHW storage tank
– one heating circuit with mixing valve and system separation
TPV
PRV
Y
Y
I
Please note!
The use of a low-loss header is
recommended if the system 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 34 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
44
AV
M
~
Please note!
System separation is required of underfloor
heating systems employing non-oxygen
diffusion barrier tubing.
All components on the secondary side of
the heat exchanger must be made of
corrosion-resistant materials.
AV Air vent
PRV Pressure relief valve
TPV Temperature and pressure relief
F1
F1
F2
F2
I
IMPORTANT
DHW circulation pump I must pump into
the Vitodens 200 boiler (as illustrated).
IMPORTANT
Sizing of field-supplied pump
the proper boiler operation in system layout
7 (above). The selected pump performance
curve must be at least equivalent to those
shown on page 10 of this manual, or better.
An undersized pump may cause
short-cycling and/or improper operation of
the boiler. Viessmann STRONGLY
recommends using a low-loss header and a
boiler pump in system layout 7 (above).
valve
Vitodens 200 gas-fired condensing
boiler with programming unit for
weather-responsive operation
Outdoor temperature sensor of
control unit for weather-responsive
operation
Remote control
Underfloor heating circuit
Mixing valve temperature sensor
Heating circuit pump (field supplied)
Heating circuit pump (field supplied),
located upstream of heat exchanger
(see Important below)
Plate heat exchanger for system
separation
Accessory kit for heating circuit with
mixing valve
DHW circulating pump (field supplied)
DHW storage tank
DHW tank temperature sensor
Expansion tank
is critical to
F2