Viessmann Vitodens 200-W B2HA 80 Installation Instructions Manual page 38

Boiler Connections
System Layout 6
Vitodens 200-W, B2HA with...
- DHW storage tank
- one heating circuit without a mixing valve
- two heating circuits with a mixing valve
- low-loss header
Legend
A Vitodens 200-W B2HA boiler with
Vitotronic 200, HO1B outdoor reset control
B Outdoor temperature sensor !
Vitotrol remote (optional)
C
Under floor heating circuit
D
E Heating circuit pump
Mixing valve temperature sensor ?
F
Accessory kit for heating circuit with mixing valve
G
H Heating circuit pumps
DHW storage tank
I
J DHW tank temperature sensor %
K Expansion tank
Temperature and pressure relief valve
L
M Low-loss header
Viessmann temperature sensor for low-loss header ?
N
Pressure relief valve
O
P DHW recirculation pump
Radiator heating circuit
Q
R Boiler pump
20
S DHW circulating pump sA
* Function based on coding of address 53
38
*
28/20
*
28/20
Vitodens 200-W B2HA 80 to 100, 285 to 352 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 B2HA 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.
IMPORTANT
DHW circulating pump S must pump into the Vitodens
200-W B2HA boiler (as illustrated).