Viessmann Vitotronic 300 Installation And Service Instructions Manual page 81

Vitotronic 300, GW5B Installation and Service
Connection and Wiring Diagram
Low voltage PCB
Outdoor temperature sensor (ATS)
!
%A DHW temperature sensor
%B DHW temperature sensor 2 for primary store
system (optional accessory, not used)
) Supply temperature sensor, low loss header
(optional accessory)
aJ B Temperature sensor primary store system
(optional accessory, not used)
External hook-up
aVD
aVG KM BUS participant e.g Vitotrol Remote (accessory)
aVH External connection
(continued)
LON Cable for data exchange between control units
(accessories)
S3 Emissions test switch
V1 Fault indicator (red)
V2 On indicator (green)
X Electrical interfaces
Designs
81