General specs
Terminal
Specification
Notes
L
230 V AC/50 Hz mains voltage
Live wire
N
230 V AC/50 Hz mains voltage
Neutral wire
1
Heating relay normally closed/satisfied
3 A resistive, 1 A inductive
2
Heating relay common
3 A resistive, 1 A inductive
3
Heating relay normally open/call for heat
3 A resistive, 1 A inductive
4
Hot water relay normally closed/satisfied
3 A resistive, 1 A inductive
5
Hot water relay common
3 A resistive, 1 A inductive
6
Hot water relay normally open/call for heat
3 A resistive, 1 A inductive
OT1
OpenTherm wire 1
42 V DC max .
OT2
OpenTherm wire 2
42 V DC max .
If using T1 and T2, connect to earth
T1
12 V DC power output to Nest
T2
12 V DC power output to Nest
Note: T1 and T2 have no polarity at the thermostat .
Maximum cable thickness = 2 mm²
AC power adaptor
Input: 100-240 V AC, 50/60 Hz, 0 .2 A | Output: 5 V DC, 1 .4 A
Heat Link
W
ir
in
g s
p
ec
s
EN
21
Содержание Learning thermostat
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