Viessmann Vitodens 200 Technical Manual page 112

3.2 Installation examples
System design 20
343
System design 20
Vitodens 343 with one heating circuit without mixer and one heating circuit with mixer
P
O
WW
3
Required electrical connecting cables
2/K Number of cores/low voltage
3/230 V Number of cores/230 V~
Required equipment
Item Description
A Vitodens 343 with weather-compensated control unit
C Vitotrol 200
or
Vitotrol 300
F Temperature limiter for limiting the max. temperature of underfloor heating systems
Immersion thermostat
or
Contact thermostat
H Heating circuit pump
M Extension kit for one heating circuit with mixer plus flow temperature sensor
O Solar collectors
P Collector temperature sensor
112
B
A
2/K
2/K
2/K
2/K
3/230V
M
KW
N
System with various heating systems
H unregulated radiator circuit
H regulated underfloor heating circuit
with three-way mixer.
Standard defaults
1. The volume flow (output) of the
radiator circuit is at least 30 % greater
than the volume flow of the underfloor
heating circuit.
2. The total volume flow of both heating
circuits less the bypass volume of the
underfloor heating circuit is less than the
max. possible volume flow of 1 000 l/h of
the Vitodens.
Install a low loss header, if the max.
volume flow of an individual design is
greater than 1 000 l/h.
Installation diagram, see page 111.
D
C
F
G
2/K
H
3/230V
K
L
M
~
E
A Vitodens 343 with weather-
compensated control unit
and Vitosolic 100
B Outside temperature sensor
C Vitotrol
D Underfloor heating circuit
E Radiator heating circuit
F Maximum temperature
limiter
G Flow temperature sensor
H Heating circuit pump (on site)
K Regulating valve
L Three-way mixer
M Extension kit for one
heating circuit with mixer
N Solar cylinder
O Solar collector
P Collector temperature
sensor
KW Cold water
WW DHW
The three-way mixer provided to achieve
the low temperature level of the
underfloor heating circuit is controlled by
the extension kit for one heating circuit
with mixer.
The circulation pump integrated into the
Vitodens supplies the radiator heating
circuit. The underfloor heating circuit is
supplied by an on-site circulation pump,
which is controlled by the extension kit.
The volume flow of the underfloor
heating circuit, which is subject to
individual design criteria, is balanced by
an adjustable bypass.
Quantity Part no.
1 as per pricelist
1 7450 017
1 7179 060
1 7151 728
1 7151 729
1 on-site
1 7178 995
or
7178 996
1 as per pricelist
1 7814 617
VITODENS