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GENERAL DANGER WARNINGS
AND PREVENTIVE SAFETY
According to the VDE 0113 booklet, the emergency stop
devices must also be perfectly efficient regardless of the
gearmotor operation mode. Any release of the emergency
stop device must absolutely not cause an uncontrolled or
undefined restarting.
OVERTURNING MOMENT: The fall of the balanced door
wings by weights can be avoided if the gearmotor is still able
to support the wing weight even if the spring breaks.
A separate parachute device is necessary on doors not
balanced by weights!
This provision is based on the regulations of the National Insurance
Institute for Industrial Accidents BGR 232. The static overturning
moment is the maximum load allowed for the mechanism at the
time the spring breaks.
The Mstat static overturning moment is calculated with the following
formula:
Mstat [Nm] = Wing weight [N] × cable winder drum radius [m]
Considering that two balancing springs can yield at the same time,
the Commission of experts on the subject of building devices
recommends sizing the gearmotor so that it is able to support
the total weight of the wing when there are one or two springs
2/3 of the weight of the wing when there are three springs
1/2 of the weight of the wing when there are four springs.
Pursuant to the directives mentioned above, the considerably
greater gearmotor breaking load is not to be contemplated in
defining the gearmotor sizing.
In the case of cable winder drums of the scalar type, the greater
winding diameter is to be considered.
Consider the allowed forces of the cables!
ASSEMBLY INSTRUCTIONS / FIXING THE MECHANISM
Gearmotors with chain transmission
The gearmotors are installed on the wall with appropriate brackets
(fig. 1 and 2).
The standard fixing brackets of the gearmotor enable assembly both
horizontally (vertical gearmotor) and vertically (suspended motor).
For different positions of assembly and/or fixing of the mechanism
(reaction arms and accessories for chain systems, parachute device,
etc.), contact the Manufacturer.
During gearmotor assembly and subsequent application and chain
tensioning, make sure that the entire system is correctly positioned
and can be moved without obstacles; if necessary, tension the chain
more!
Check that the welded shafts are concentric and aligned with
the central axis of the main winding shaft since otherwise the
unbalances and angle defects that occur in this case could damage
the gearmotor or be the cause of excessive abrasion.
4 – English
EMERGENCY MANUAL RELEASES
The manual emergency release is envisaged for opening and closing
the door in case of power failure, so it is to be used only in emergency
situations.
- Avoid regular use!!
Warning! Danger of injury in the case of incorrect use!
Deactivate the main switch before using the manual emergency
release.
The manual emergency release is to be executed only with the
motor stopped.
The manual emergency release manoeuvre is to be executed
from a safe place.
With a gearmotor equipped with brake (pressure), the main door
must be opened and closed with the brake open (released).
On doors not balanced with weights, the brake is to be released
only for checking purposes with the door in the low position for
safety reasons.
An undesirable brake release must be prevented with an adequate
check (measurement) on site.
The manual emergency release must not move the door beyond
the final positions because in this case the main switch would
activate.
Therefore, operation of the door in electrical mode is no
longer possible.
Handle-operated manual emergency release (fig. 3)
Insert the handle exerting moderate pressure, then turn it up
to when it clicks in position. In this way the control voltage is
interrupted and the door can no longer be activated electrically.
Open and/or close the door turning the handle
The control voltage is reset and the door can again be activated
electrically by removing the handle.
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