| STANDARD SPECIFICATION Construction
The
shutter curtains are constructed from continuously interlocking
51 x 0.9mm thick flat-faced laths securely held in place
by endlocks. The bottom rail is also formed from a reinforced
lath to give uniformity of appearance.
Guides
Vertical guides are fabricated
from cold rolled galvanised steel channels 40 x 25mm which
are attached to the supporting
structure. Roller
The roller is made from seamless
steel tube of adequate diameter to avoid deflection and is
supported on steel endplates
on bearings. Coil Casing
Constructed from galvanised
steel and attached to the structure by M6 fixings. Drive/Controls
The shutter is driven
by a 24 volt DC flat armature motor mounted on one endplate
and covered by a galvanised casing.
It is operated from batteries contained within the local
control panel. The motor drives the shutter upwards with
the downward motion being gravity failsafe. A pair of terminals is provided in the
control panel to accept a normally closed volt-free contact
from the client's
fire detection or building management system.
When the mains supply is removed or
the control panel receives a fire signal, a sounder and LED
on the low-level control
station are activated for 15 seconds, following which the
shutter will close. The standard system is supplied pre-wired
in our factory thus avoiding the expense of a site electrician
and merely
needs a 13 amp three pin socket within one metre of the motor
position.
The motor is hidden within the casing and easily accessed
from underneath for maintenance purposes.
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