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D
NC
NA
C
E
NC
NA
C
F
NC
NA
C
NC
NA
C
N
N
U1
LOAD
OPEN
U1
N
N
LOAD
OPEN
M
CLOSED
U2
M
U2
Electrical connections
The connections are made ac-
cording to the type of equipment
controlled by the programmable
thermostat.
KEY
L
Mains power supply wires
N = neutral
L = live
OFF
Relay contacts
L
C = common
230V~
NA = normally open contact
50 Hz
NC = normally closed contact
Loads
U1 = burner, circulation pump,
solenoid valve, etc.
OFF
U2 = motorised valve
NOTE. For connection details, refer
OFF
to the technical documentation of
L
the device to be controlled.
230V~
50 Hz
L
OFF
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