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Boiler Connections
System Layout 6
Vitodens 200-W, B2HB with...
- DHW storage tank
- one heating circuit without a mixing valve
- two heating circuits with a mixing valve
- low-loss header
Legend
Vitodens 200-W B2HB boiler with
A
Vitotronic 200, HO1B outdoor reset control
Outdoor temperature sensor !
B
Vitotrol remote (optional)
C
D
Under floor heating circuit
Heating circuit pump
E
F
Mixing valve temperature sensor ?
G
Accessory kit for heating circuit with mixing valve
Heating circuit pumps
H
I
DHW storage tank
DHW tank temperature sensor %
J
Expansion tank
K
L
Temperature and pressure relief valve
Low-loss header
M
N
Viessmann temperature sensor for low-loss header ?
O
Pressure relief valve
DHW recirculation pump
P
Q
Radiator heating circuit
Boiler pump
R
20
DHW circulating pump sA
S
*
Function based on coding of address 33
38
*
28/20
*
28/20
Vitodens 200-W B2HB 45, 57 Installation
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 200-W B2HB boiler (see page 31 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.
IMPORTANT
DHW circulating pump S must pump into the Vitodens
200-W B2HB boiler (as illustrated).
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