Viessmann VITOTRONIC 300 GW2, Инструкция по установке и обслуживанию

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Heating system types
14
Heating system types for condensing boilers
(continued)
System type 4 - Single-boiler system with Vitocrossal 300 with several heating circuits and one modulating supply
temperature heating circuit
A Boiler with Vitotronic 300
B
Domestic hot water tank
C Heating circuit with mixing valve
D Modulating supply temperature
heating circuit
or
E
Underfloor heating circuit
F High limit thermostat (max. limit)
G
Neutralizing unit
plugs
!
Outdoor temperature sensor
? M2 Supply temperature sensor,
mixing valve circuit 2
?
M3 Supply temperature sensor,
mixing valve circuit 3
§
Boiler temperature sensor
% DHW tank temperature sensor
sÖ
A1 Heating circuit without mixing
valve (if installed)
sÖ
M2 Heating circuit pump, mixing
valve circuit 2
sÖ
M3 Heating circuit pump, mixing
valve circuit 3
sA
Circulation pump for heating
the DHW tank
sK DHW re-circulation pump
fÖ
Power supply connection
120 VAC
fA
Burner (1st stage)
gS M2 Mixing valve motor, mixing
valve circuit 2
gS M3 Mixing valve motor, mixing
valve circuit 3
lÖ Burner (2nd stage/modulating)
aVD
Connection of external
equipment (see page 38)
aVH Connection of external
equipment (see page 39)
5285
941
-
0
1
20 2 20 52 2 20 52
A1 M2 M3
3
5
21
28
1
B
C D
2
20
52
M3
A
90 41 40
146 143
G
or
E
2
M3
20
52
2
20
52
M2
F