Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 228

Connection and wiring diagrams
Overview of the PCBs and connection options
Controller and sensor PCB
F21
F23
F18
F20
F.. Plug for sensor
LON Slot for LON module
Sensors
Plug Sensor
F0 Outside temperature sensor
Connect on site
F2 Flow temperature sensor, primary circuit
Factory connection
F3 Return temperature sensor, primary circuit
Factory connection
F4 Buffer temperature sensor above
Connect on site
228
F16 F11
F17 F12
F13 F8
F14 F9
X31
F6 F0
F7 F2
F3
aVG
F4
"X31" Coding card slot
aVG KM BUS
(cont.)
L
G
N
Type
Ni 500
Pt 500
Pt 500
Pt 500