Viessmann GC1 - Connecting Sensors

Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service
5793 309 - 05
76
Vitotronic 300-K, Installation
Installation point for outside temperature sensor
H North or north-western wall, 6.6 to 8.2 ft. (2 to 2.5 m)
above ground level; in multi storey buildings, in the
upper half of the second floor
H Not above windows, doors or ventilation outlets
H Not immediately below balconies or gutters
H Never render over
Legend
! Outside temperature sensor
§/? Common supply temperature sensor
%A DHW tank temperature sensor 1
%B DHW tank temperature sensor 2 for primary
store system (optional accessory, not used)
aJB Return temperature sensor T2
or
Temperature sensor primary store system
(optional accessory, not used)
Connecting Sensors
Outside temperature sensor connection
Two wire communication cable 16 AWG
(maximum length 95 ft. (30 m)