System Layout 7 - Viessmann VITODENS 200-W Technical Data Manual

Vitodens 200-W, B2HB 19 to 35 Technical Data

System Layout 7

Vitodens 200-W, B2HB with...
- direct-connected heating circuit
- one heating circuit with system separation
Legend
A
Vitodens 200-W B2HB boiler with Vitotronic 200,
HO1B outdoor reset control
B Outdoor temperature sensor !
C
Vitotrol remote (optional)
D
Under floor heating circuit
E
Radiator heating circuit
F
Plate heat exchanger for system separation
G
Heating circuit pump
H Mixing valve temperature sensor ?
I
Accessory kit for heating circuit with mixing valve
J
DHW storage tank
K DHW tank temperature sensor %
L
Expansion tanks
M
Temperature and pressure relief valve
N
Pressure relief valve
O
DHW recirculation pump
P
Boiler pump
20
Q DHW circulating pump sA
* Function based on coding of address 33
IMPORTANT
DHW circulating pump Q must pump into the Vitodens
200-W B2HB 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 B2HB boiler (see page 8 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.
Installation Examples
supplies the
20
35