13
L
N
NC
NA
C
1 2
U2
LOAD
M
CLOSED
OPEN
Relay contacts
C
= common
NO
= normally open contact
NC
=normally closed contact
Remote control inputs
1
input
2
input
Loads
U1
= boiler, circulation pump, solenoid valve, etc.
U2
= motorised valve
L
N
NC
NA
C
1 2
U1
LOAD
L
N
NC
NA
C
1 2
Fig. 9
Fig. 7
Fig. 8