nest Learning thermostat - Configuring Nest with Pro Setup; What is Pro Setup?; How do I enter Pro Setup?; How do I use Pro Setup?

230 V combi boiler
L
N
Boiler
12 V
3 A
230 V AC/50 Hz
N L 1 2 3 4 5 6 OT1 OT2 T1 T2
LN
Input power
20