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Vitodens 222-F, B2TB 19, 35, 68, 125 Installation
Installation Examples
System Layout 6
Vitodens 222-F, B2TB with...
- Integrated DHW production
- one direct-connected heating circuit
- one heating circuit with system separation
Installation of different heating circuits...
■ two heating circuits with 3-way mixing valve
(low-temp. circuit)
■ DHW production
... with the following flow conditions:
The total flow rate of the two heating circuits is greater
than the maximum possible water flow rate of the
Vitodens 222-F B2TB boiler (see page 30 for maximum
water flow rate of boiler).
The use of a low-loss header is strongly recommended.
The low-loss header is available as accessory part.
The 3-way mixing valve, built-in to achieve the low-
temperature level of the under floor heating circuit, is
controlled by an accessory kit for a heating circuit with
a mixing valve.
Legend
A Vitodens 222-F B2TB boiler with
Vitotronic 200, HO1B outdoor reset control
B Outdoor temperature sensor !
C Vitotrol remote (optional)
D Under floor heating circuit
E Mixing valve temperature sensor ?
F Accessory kit for heating circuit with mixing valve
G Heating circuit pumps
H DHW storage tank
I Integral expansion tank
J Pressure relief valve outlet
K Temperature and pressure relief valve outlet
L Radiator heating circuit
M Boiler pump
20
N DHW circulating pump sA
O Plate exchanger for system separation
P DCW inlet
Q DHW outlet
R Expansion tank
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