Viessmann VITOTRONIC 100 GC1 Installation And Service Instructions Manual page 8

Heating system types
Circuit Diagram 1
Single-boiler system with Therm-Control and three-way mixing valve
in conjunction with Vitorond 200, VD2A
A Heating circuit with mixing valves
B DHW tank
Plug
!
Outdoor temperature sensor
(only for Vitotronic 300)
?M2
Flow temperature sensor,
mixing valve (only for the
Vitotronic 300)
?M3
Flow temperature sensor,
mixing valve (only for
Vitotronic 300)
§
Boiler water temperature
sensor
%
DHW tank temperature sensor
(accessory for the Vitotronic
100)
aJA
Therm-Control temperature
sensor
8
sÖM2
Heating circuit pump, mixing
valve (only for Vitotronic 300)
sÖM3
Heating circuit pump, mixing
valve (only for Vitotronic 300)
sÖA1
Closing the mixing valves with
external heating circuit control
units
sA
DHW primary pump
sK
DHW circulation pump (only
for the Vitotronic 300)
fÖ
Power supply, 120 VAC
60 Hz
Install the main isolator in
accordance with regulations
fA
Burner (stage 1)
gSM2
Mixing valve motor (only for
Vitotronic 300)
gSM3
Mixing valve motor (only for
Vitotronic 300)
lÖ
Burner
(burner stage 2 / mod.)
aVD/aVH External connections
Please refer to the control
manual Vitotronic 300 GW2.