3.2.2 Torque
The maximum torque (twisting force) that must be handled by the mounting systems
occurs at start up. For a 24' BloBlades Fan the starting torque is potentially 220 N.m.
Maximum. We say "potentially" because with the standard electrical controls supplied,
the
maximum
is
never
even
approached
because
the
controls
employ
soft
start
technology. This prevents full torque from being applied at startup. But there is always the
possibility of failure of the soft start technology. It is important that the mount is
adequate to withstand 220 N.m.
3.2.3 Safety Cable
Because of the obvious risk of a falling fan, whatever mounting method is used to suspend
the fan, it should always be backed up with a safety cable.
Safety cable, along with all required hardware, is supplied with every fan. An HVLS fan
should never be run without a properly installed safety cable. Refer to fig. 3.1 for
proper installation of safety cable.
3.2.4
Clearance and Guy Cables
In some cases space
considerations dictate that
blades swing
close
to
beams,
column, lights, etc. Anything less
than 12" can be considered "close
clearance”because these fans
have the potential to move around
quite a
bit.
Fig3.2 Install methods of Guy Cables
10
Fig3.1
OOD
NO G
GOOD