Heating system types
11
Circuit Diagram 3
Single-boiler system with shunt pump for elevating the return temperature
in conjunction with Vitorond 200, VD2
A
Boiler with Vitotronic 100, GC1
B
Domestic hot water tank
C
Heating circuit with mixing valve
Plugs
§
Boiler temperature sensor
%
DHW tank temperature sensor
(accessory)
aJ
A
Temperature sensor T1
aJ
B
Temperature sensor T2
sÖ
A1 Close mixing valves with
external heating circuit
controls
sA
DHW pump
sL
Shunt pump
fÖ
Power supply connection,
120 VAC
fA
Burner (1st stage)
lÖ
Burner (2nd stage/modulating)
aVD
Connection of external
equipment (see page 60)
aVH
Connection of external
equipment (see page 60)
*1
On the Vitorond the boiler supply and return are at the rear of the boiler.
5
3
5
1
3
3
8
v
1
.8
B
C
C
A
9
0
4
1
4
0
1
4
6
1
4
3
3
17A
17B
T1
T2
*1
2
9
5
21
A
1
2
0
