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Boiler Control Alternatives
VITOROND 200, VD2A
17
Installation Example: Single-Boiler System, Vitorond 200, VD2A with Therm-Control
Fig. 12
A
Heating circuit with mixing valves
B
DHW tank
Plug
!
Outdoor temperature sensor
(only for Vitotronic 200 and 300)
?
M2
Flow temperature sensor, mixing
valve (only for the Vitotronic
300)
?
M3
Flow temperature sensor, mixing
valve
§
Boiler water temperature sensor
%
DHW tank temperature sensor
(accessory for the Vitotronic 100)
aJ
A
Therm-Control temperature
sensor
sÖ
M2
Heating circuit pump, mixing
valve (only for Vitotronic 300)
sÖ
M3
Heating circuit pump, mixing
valve (only for Vitotronic 300)
sÖ
A1
Closing the mixing valves with
external heating circuit control
units
sA
DHW primary pump
sK
DHW circulation pump (only for
the Vitotronic 200 and 300)
fA
Burner (stage 1)
gS
M2
Mixing valve motor (only for
Vitotronic 300)
gS
M3
Mixing valve motor (only for
Vitotronic 300)
lÖ
Burner
(burner stage 2 / mod.)
Please refer to the control
manuals Vitotronic 100, GC1
and Vitocontrol-S, VD2/CT3.
5
3
5
4
7
8
7
v
1
.2