Technical data

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Vitodens 200-W B2HA 100 to 150 Technical Data
Installation Examples
System Layout 3
36
Vitodens 200-W, B2HA with...
- DHW storage tank
- one heating circuit with mixing valve and system separation
Installation of ...
■ underfloor heating circuit with 3-way mixing valve
and system separation (low-temp. circuit)
■ DHW production
... with the following flow conditions:
The flow rate of the heating circuit is less than the
maximum possible water flow rate of the Vitodens
200-W B2HA boiler.
See page 30 for maximum water flow rate of the Vitodens
200-W B2HA boilers. The use of a low-loss header is
recommended if the system water flow rate is unknown.
The low-loss header is available as accessory part.
See following pages for installation examples with a
low-loss header.
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.
Sizing of field-supplied pump P is critical for proper boiler
operation in this system layout. See page 9 for the supply
head pressure drop of the boiler. 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 this system layout.
IMPORTANT
IMPORTANT
IMPORTANT
Legend
A Vitodens 200-W B2HA boiler with
Vitotronic 200, HO1B outdoor reset
control
B Outdoor temperature !
C Vitotrol remote (optional)
D Underfloor heating circuit
E Mixing valve temperature sensor ?
F Pressure relief valve
G Plate heat exchanger for system
separation
H Accessory kit for heating circuit with
mixing valve
I DHW circulating pump sA
J DHW storage tank
K DHW tank temperature sensor %
L Expansion tank
M DHW recirculation pump 28/20 *
N Temperature and pressure relief valve
O Flow check valve
P Heating circuit pump 20
Q Heating circuit pump
* Function based on coding of address 33
DHW circulating pump must pump I into the Vitodens
200-W B2HA boiler (as illustrated).