Viessmann Vitodens 200 Technical Manual page 90

3.2 Installation examples
System design 2
200
System design 2
Vitodens 200 or 300 with/without DHW heating with one heating circuit without mixer and one heating circuit with mixer
300
A
O
N
System with various heating systems
H unregulated radiator circuit
H regulated underfloor heating circuit
3
with three-way mixer.
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 200 or 300 or 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
L 3 way mixer
M Extension kit for one heating circuit with mixer plus flow temperature sensor
N Cylinder temperature sensor
O DHW cylinder
90
B C C D
F
J
2/K
G
2/K
2/K
J
2/K
3/230V
H
K
M
M
~
L
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 the Vitodens.
Boiler
Vitodens 200
Vitodens 300,
4.2 kW 13.0 kW
Vitodens 300,
6.6 kW 26.0 kW
Vitodens 300,
8.7 kW 35.0 kW
E
A Vitodens with weather-compensated
control unit
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 Cylinder temperature sensor
O DHW cylinder
Install a low loss header, if the max.
volume flow of an individual design is
greater than the values shown in the
above table.
Installation diagram, see page 94.
The three-way mixer provided to achieve
the low temperature level required by the
underfloor heating circuit is controlled by
the extension kit for one heating circuit
with mixer.
Max. volume flow
The circulation pump integrated into the
l/h
Vitodens supplies the radiator heating
1 400
circuit. The underfloor heating circuit is
1 000
supplied by an on-site circulation pump,
which is controlled by the extension kit.
The volume flow of the underfloor
1 400
heating circuit, which is subject to
individual design criteria, is balanced by
1 600
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 as per pricelist
1 7178 995
or
7178 996
1 Standard
delivery
connection set
for DHW
cylinder
1 as per pricelist
VITODENS