Heating system types
25
Circuit Diagram 10
Single-boiler system with several heating circuits and one mixing valve heating circuit
in conjunction with Vitocrossal 300
A Boiler with Vitotronic 100, GC1
B Domestic hot water tank
C Heating circuit with mixing valve
D Mixing valve heating circuit
or
E Underfloor heating circuit with
mixing valve
F Limit thermostat (max. limit)
G Neutralizing unit
Plugs
§ Boiler temperature sensor
% DHW tank temperature sensor
(accessory)
sÖ A1 Close mixing valves with
external heating circuit controls
sA DHW pump
fÖ Power supply connection,
120 VAC
fA Burner (1st stage)
lÖ Burner (2nd stage/modulating)
aVD Connection of external
equipment (see page 51)
aVH Connection of external
equipment (see page 51)
5351 338 v1.6
3
B
C D
A
90
41
40
146
143
G
or
E
F
5
21
A1
20
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