System Layout 7 - Viessmann Vitodens 200-W Series Installation Instructions Manual

Boiler Connections
Installation Examples

System layout 7

Vitodens 200-W, WB2B with...
– direct-connected heating circuit
– one heating circuit with system separation
R
J
TPV
K
5
N
O
N
Fig. 29
Legend
PRV Pressure relief valve
TPV Temperature and pressure relief valve
Vitodens 200-W WB2B boiler with
Vitotronic 200, HO1 outdoor reset
control
Outdoor temperature sensor
Remote control Vitotrol 300 (optional)
Under floor heating circuit
Heating circuit pump
Plate heat exchanger for system
separation
Heating circuit pump
Mixing valve temperature sensor
I
Accessory kit for heating circuit with
mixing valve
DHW storage tank
J
DHW tank temperature sensor
Expansion tanks
Optional purge tee (field supplied)
DHW supply and return piping
O DHW recirculation pump sK*
P Boiler pump sÖ*
Q DHW circulating pump sA*
R Power/pump module
S Flow check valve
* See pages 54 and 58.
36
(continued)
B
A
PRV
V
S
M
P
Q
L
Installation of different heating circuits...
H radiator heating circuit (high-temp. circuit)
H under floor heating circuit with 3-way
mixing valve (low-temp. circuit)
H 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
WB2B boiler (see page 29 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 sÖ supplies the
radiator heating circuit and the plate heat
exchanger for system separation.
1
C
2
G
I
F
E
D
IMPORTANT
The pressure drop (secondary circuit) of the
plate heat exchanger 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.
IMPORTANT
Please note location of expansion tanks
and flow check valve S.
IMPORTANT
DHW circulating pump Q must pump into
the Vitodens 200-W WB2B boiler (as
illustrated).