Viessmann B2TB004 Installation Instructions Manual page 38

Installation Examples
System Layout 7
Vitodens 222-F, B2TB with...
- one direct-connected heating circuit
- three heating circuits with mixing valve and integrated DHW production
Legend
A Vitodens 222-F B2TB boiler with Vitotronic 200,
HO1B outdoor reset control
B Outdoor temperature sensor !
C Vitotrol remote (optional)
Under floor heating circuit
D
E Radiator heating circuit
Heating circuit pump
F
Mixing valve temperature sensor ?
G
H Accessory kit for heating circuit with mixing valve
DHW storage tank
I
J Integral expansion tank
K Temperature and pressure relief valve outlet
Pressure relief valve outlet
L
M Boiler pump
20
DHW circulating pump sA
N
Low-loss header
O
P Low-loss header sensor ?
DCW inlet
Q
R DHW outlet
S Vitotronic 200-H HK1B
38
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Vitodens 222-F, B2TB 19, 35, 68, 125 Installation
Installation of different heating circuits...
radiator heating circuit (high-temp. circuit)
■
under floor heating circuit 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 less 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 if
the maximum water flow rate in the application concerned
exceeds the max. boiler flow rate, or if the system flow
rates are unknown. The low-loss header is available as
accessory part.