Viessmann Vitodens 200-W B2HA 80 Installation Instructions Manual page 39

Vitodens 200-W B2HA 80 to 100, 285 to 352 Installation
System Layout 7
Vitodens 200-W, B2HA with...
- direct-connected heating circuit
- one heating circuit with system separation
Legend
Vitodens 200-W B2HA boiler with Vitotronic 200,
A
HO1B outdoor reset control
B Outdoor temperature sensor !
Vitotrol remote (optional)
C
D Under floor heating circuit
E Radiator heating circuit
Plate heat exchanger for system separation
F
G Heating circuit pump
Mixing valve temperature sensor ?
H
Accessory kit for heating circuit with mixing valve
I
J DHW storage tank
DHW tank temperature sensor %
K
L Expansion tanks
M Temperature and pressure relief valve
Pressure relief valve
N
O DHW recirculation pump
Boiler pump
P
20
DHW circulating pump sA
Q
* Function based on coding of address 53
IMPORTANT
DHW circulating pump Q must pump into the Vitodens
200-W B2HA boiler (as illustrated).
*
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 less 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 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.
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 I. The boiler pump
radiator heating circuit and the plate heat exchanger
for system separation.
IMPORTANT
The pressure drop (secondary circuit) of the plate heat
exchanger F must be less/equal to the pressure drop of
the 3-way mixing valve. This must be taken into account
when sizing the plate heat exchanger.
Boiler Connections
supplies the
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