Installation - Vitotronic; Summary Of Electrical Connections - Viessmann Vitotronic 100 GC1 Installation And Service Instructions Manual

Summary of electrical connections

145
17 B
17 A
5
3/2
21
15
52
143
20
146
29
50
40
156
156
Low voltage connections (motherboard)
§
Boiler temperature sensor
%
No function
aG
Flue gas temperature sensor
(accessory)
aJA Therm-Control temperature
sensor
or
return temperature sensor T1
(accessory)
aJB Return temperature sensor T2
(accessory)
aVD
External connection
aVG
KM BUS participant, e.g. plug-in
adaptor for external safety
equipment
aVH
External connection (Page 39)
A1/M1
A1/M1
150
Line voltage connections (motherboard)
sÖA1 DHW recirculation pump –
or
switched output
sA
No function
sL
Shunt pump (on site)
or
boiler circuit pump (on site)
fÖ
Power connection
fA
Burner (burner stage 1)
gÖ
Central fault message
gSA1 Isolation valve
or
actuator for three-way mixing
valve for return temperature
control
Installation – Vitotronic 100, GC1
151
90
41
lÖ
Burner (burner stage 2/mod.)
aBÖ
External connections,
e.g. supplementary safety
equipment
aBA
Safety circuit, potential free
aBH
Power supply for accessories
27