Viessmann B2HB009 Installation Instructions Manual page 37

Vitodens 200-W B2HB 19 to 35, 68 to 125 Installation
System Layout 5
Vitodens 200-W, B2HB with...
- DHW storage tank
- one heating circuit with mixing valve
- one heating circuit without mixing valve and low-loss header
Legend
Vitodens 200-W B2HB boiler with
A
Vitotronic 200, HO1B outdoor reset control
B Outdoor temperature sensor !
Vitotrol remote (optional)
C
D Under floor heating circuit
E Radiator heating circuit
Boiler circuit pump
F
20
G Mixing valve temperature sensor ?
Kit for heating circuit with mixing valve
H
Domestic hot water storage tank
I
J DHW tank temperature sensor %
Expansion tank
K
Temperature and pressure relief valve
L
M Pressure relief valve
DHW recirculation pump
N
O DHW circulating pump sA
P Heating circuit pump
Low-loss header
Q
R Viessmann temperature sensor for low-loss header ?
Heating circuit pump
S
* Function based on coding of address 53
*
28/20
*
28/20
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 greater
than the maximum possible water flow rate of the
Vitodens 200-W B2HB 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
mixing valve.
IMPORTANT
DHW circulating pump O must pump into the Vitodens
200-W B2HB boiler (as illustrated).
Boiler Connections
37