Connect Sensors; Connecting Sensors - Viessmann Vitotronic 300 Installation And Service Instructions Manual

Vitotronic 300, GW5B Installation and Service

Connecting Sensors

Legend
Main PCB, low voltage
Outside temperature sensor (ATS)
!
%A DHW temperature sensor 1
%B DHW temperature sensor 2 (optional accessory,
not used) for primary store system
aJB Temperature sensor T2 (optional accessory,
not used)
) Supply temperature sensor, low loss header
(accessory).
Fitting location for outside temperature sensor
North or north-westerly wall, 6-8 ft. (2 to 2.5 m)
above ground level; in multi storey buildings, in the
upper half of the second floor.
Not above windows, doors or ventilation outlets.
Not immediately below balconies or gutters.
Never render over.
Outside temperature sensor connection
Make connection using 2 wire 18 awg communication
cable to connect outdoor sensor to #1 plug [maximum
length 100 ft. (35 m)].
Installation Sequence
15