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Vitodens 222-F, B2TB 19, 35, 68, 125 Installation
Installation Examples
System Layout 3
Vitodens 222-F, B2TB with...
- Integrated DHW production
- 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
222-F B2TB boiler.
See page 30 for maximum water flow rate of the Vitodens
222-F B2TB 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.
IMPORTANT
Legend
A Vitodens 222-F B2TB boiler with
Vitotronic 200, HO1B outdoor reset
control
B Outdoor temperature sensor !
C Vitotrol remote (optional)
D Underfloor heating circuit
E Mixing valve temperature sensor ?
F Pressure relief valve outlet
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 Integral expansion tank
L Boiler pump 20
M Temperature and pressure relief valve outlet
N DCW inlet
O DHW outlet
P Expansion tank
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