• Perform polarity check to have the LIVE wire connected to the
mains fuse:
• Turn OFF the mains room switch.
• Turn OFF the system mains switch.
• Connect an AC voltmeter between the LIVE and GROUND
points on the mains input block.
• Turn ON the mains room switch and system mains switch.
• If full line voltage is measured the wiring is correct.
If not, turn OFF the mains room switch and turn OFF the
system mains switch, reverse “live in” and “neutral in” wires,
then repeat the measurement.
• No voltage or very low voltage has to be read between “neutral”
and GROUND. If not check line voltage distribution.
• Turn OFF the mains room switch and system mains switch
• Connect the power supply cable to the mains line block on the wall,
permanently.
• The actual connection on the wall is recommended to be made at
column side, about 80 cm (31”) from the floor, so the mains cable
is free to move up and down.
• Apply fuse label for selected mains voltage close to the mains fuse
holder or check the applicable box on the existing label
• Put back the top metal cover on the power supply unit making sure
the cables of the buzzer are properly connected.
NOTE: Tic the box in the
fuse label to indicate the
actual line voltage as set on
the unit, either 115 V or 230
V
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