Viessmann vitodens Technical Manual page 82

3.2 Installation examples
System design 11
333
System design 11
Vitodens 333 with one heating circuit with mixer (with extension kit), one heating circuit with mixer (with Vitotronic 050)
and low loss header
A
WW
R
3
A Vitodens 333 with
weather-compensated control unit
and LON communication module
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)
System with various heating systems
H regulated radiator heating circuit
H regulated underfloor heating circuit
with three-way mixer.
82
LON
B
C
F
G
H
K
O
L
M
~
M
P
KW
K Regulating valve
L Three-way mixer
M Extension kit for one heating circuit
with mixer
N Vitotronic 050 (type HK1M)
O Flow temperature sensor for
low loss header
P Low loss header
R DHW loading cylinder
Standard defaults
The total volume flow of both heating
circuits less the bypass volume of the
underfloor heating system is greater than
the max. possible Vitodens volume flow
of 1 400 litres/h.
Therefore the low loss header needs to be
installed.
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.
E
D
230V~
G
H
L
M
~
N
KW Cold water
WW Hot water
The circulation pump integrated into
Vitodens supplies the heating circuit up to
the low loss header.
The underfloor and the radiator heating
circuits are supplied by on-site circulation
pumps, which are controlled by the
extension kit or Vitotronic 050
(type HK1M).
If more than two heating circuits with
mixers are to be connected, these may be
regulated by Vitotronic 050 (type HK3W).
The volume flow of the underfloor
heating circuit, which is subject to
individual design criteria, is balanced by
an adjustable bypass.
Low loss headers are available in
conjunction with Modular Divicon or
individually as accessory.
See price list Vitotec or Vitoset.
For further details regarding low loss
headers, see page 92.
VITODENS