21
NCNA C
1
2
L
N
TH350
U2
M
LOAD
OPEN
CLOSED
20
NCNA C
1
2
U1
L
N
TH350
19
LOAD
NCNA C
1
2
L
N
TH350
21
2
-
ELECTRICAL CONNECTIONS
Wiring will depend on the type of equipment controlled
by the programmable thermostat: refer, therefore, to the
diagram in fig. 19, 20 or 21.
KEY
Mains power supply wires
N =
neutral
L =
phase
Relay contacts
C
= common
NA
= normally open contact
NC
=normally closed contact
TH350 EN 05_08.indd 21
TH350 EN 05_08.indd 21
30-05-2008 8:20:49
30-05-2008 8:20:49
