Viessmann Vitodens 200 Technical Manual page 91

System design 3
Vitodens 200 or 300 with/without DHW heating with one heating circuit without mixer and one heating circuit with mixer plus
system separation
A
P
O
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 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 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 Extension kit for one heating circuit with mixer plus flow temperature sensor
M Plate heat exchanger Vitotrans 100
O Cylinder temperature sensor
P DHW cylinder
VITODENS
D
B C
F
J
2/K
G
2/K 2/K
J
2/K
3/230V
H
K
M
L
~
M
N
Standard defaults
The total volume flow of both heating
circuits is less than the max. possible
volume flow of the Vitodens.
The pressure differential (Dp) between
the radiator heating circuit E and the
plate heat exchanger M is balanced via
the regulating valves N.
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
3.2 Installation examples
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 Three-way mixer
L Extension kit for one heating circuit
with mixer
M Plate heat exchanger for system
separation
N Regulating valve
O Cylinder temperature sensor
P DHW cylinder
N
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
Max. volume flow
circulation pump, which is controlled by
l/h
the extension kit.
1 400
*1
1 000
Note!
The secondary pressure drop of the
plate heat exchanger M must be
1 400
less/equal (x) than/to the pressure drop
of the three-way mixer.
1 600
Please observe this when sizing the
plate heat exchanger (mixer has control
priority).
System design 3
*1
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 Standard delivery
connection set for
DHW cylinder
1 as per pricelist
91
300
3