SMS SenTRI2, Руководство по установке, Страница: 5 / 44

5
SenTRI4 fire system
Earth continuity
All earth connection points should
be clean to provide a good electrical
conductivity path. To maintain the earth
continuity: all earth leads and fittings
provided should be installed. The loop
cable screen must be continued through
each system device on the loop circuit,
whether the earth is connected to the
device or not.
Do not use any part of
building structure for
earthing.
Some of the system products having
metal enclosures have a zinc coating
around the cable termination points,
the coating provides a good electrical
conductivity path for cable earth
termination. The zinc coating on metal
enclosures should not be damaged. Any
damage will expose bare metal, which
can corrode and make a poor earth
connection.
Power supply
The power to the system is derived from
the mains and battery supplies. Before
removal of a card or disconnection of
cable from the panel ensure both mains
and battery supplies are disconnected.
Mains supply
Mains supply to any fire alarm control
and indicating equipment must be via
an unswitched 5A fused spur unit. A
disconnect device must be provided to
disconnect both poles and must have a
minimum gap of 3mm. The disconnect
device should be available as part of the
building installation and must be easily
accessible after installation is complete.
All mains powered
equipment must be
earthed.
Local Manual Call Point
To comply with the requirements of
EN54-2 : 1997 a conventional manual call
point must be installed near the Control
panel. The call point must be wired to a
monitored line input of an interface unit.
During commissioning of the system a
Command Build No 250 associated with
the monitored line input must be set up to
evacuate all sectors without delay.
Failure to install and
configure a local manual
call point in the manner
described above when
delays are set up on the
system will result in the
panel not complying to
EN54-2 : 1997 .