Viessmann Vitodens 200 Technical Manual page 113

System design 21
Vitodens 343 with one heating circuit without mixer and one heating circuit with mixer plus system separation
R
P
2/K
WW
Required electrical connecting cables
2/K Number of cores/low voltage
3/230 V Number of cores/230 V~
System with various heating systems
H unregulated radiator circuit
H regulated underfloor heating circuit
with three-way mixer and system
separation for permeable plastic pipes
(DIN 4726).
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
N Plate heat exchanger Vitotrans 100
P Solar collectors
R Collector temperature sensor
VITODENS
B C
F
A
G
2/K
2/K
2/K
2/K
3/230V
3/230V
M
M
~
N
KW
O
Standard defaults
The total volume flow of both heating
circuits is less than the max. possible
volume flow of the Vitodens.
Balance the pressure differential (Dp)
between the radiator heating circuit E
and the plate heat exchanger N via the
regulating valves K.
3.2 Installation examples
D E
A Vitodens 343 with
B Outside temperature sensor
C Vitotrol
D Underfloor heating circuit
H E Radiator heating circuit
K
F Maximum temperature
G Flow temperature sensor
L
H Heating circuit pump (on site)
K Regulating valve
L Three-way mixer
M Extension kit for one
K K
N Plate heat exchanger for
O DHW storage cylinder
P Solar collectors
R Collector temperature
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 and the plate heat exchanger for
system separation. The underfloor
heating circuit is supplied by an on-site
circulation pump, which is controlled by
the extension kit.
*1
Note!
The secondary pressure drop of the
plate heat exchanger N must be
less/equal (x) than/to the pressure drop
of the three-way mixer.
Please observe this when sizing the
plate heat exchanger (mixer has control
priority).
Quantity Part no.
1
1
1
1
1
1
1
1
1
1
System design 21
weather-compensated
control unit and
Vitosolic 100
limiter
heating circuit with mixer
*1
system separation
sensor
as per pricelist
7450 017
7179 060
7151 728
7151 729
on-site
7178 995
or
7178 996
as per pricelist
as per pricelist
7814 617
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