Viessmann Vitoligno 250-S Installation And Service Instructions For Contractors page 66

Connection and wiring diagram
230 V plugs
(cont.)
Plug
aBÖ
Fig. 45
Assignment
1
2
3
4
5
6
7
LV plugs
Plug : Lambda probe
a:K
Fig. 46
Assignment
1
2
3
4
Note
Test point: Assignment 3 and 4
66
Function
230 V (HLSC)
—
STB
230 V (jumper L)
N (jumper N)
N (jumper N)
230 V (jumper L)
Function
Lambda probe 14 V +
Lambda probe 14 V -
Lambda probe +
Lambda probe GND
Additional information
—
—
—
—
—
—
—
198
Additional information
Heating (white)
Heating (white)
Actual value + (black) l
GND - (grey)