TABLE OF CONTENTS
SKYFOLD CLASSIC, ZENITH AND MIRAGE RETRACTABLE WALLS
14
COMPONENTS
Without power, the electromagnetic brake can be released manually by pulling the
brake release lever. This allows the wall to descend under its own weight. Its speed is
controlled by the hydraulic checking device. The system must be recalibrated before it
can be used again. Leave the control box disconnect switch in the OFF position until it
can be recalibrated by a certified Skyfold installer.
Spring-Cushioned Torque Arm
A spring-cushioned torque arm supports the motor assembly in order to soften the starts
and stops of the system. As part of this assembly, a sensor on the torque arm detects higher
than normal torque levels. In the event of a mechanical jamming in the system, or if the
upper limit switch fails to operate, the over-torque sensor quickly cuts power to the motor
(see
Figure 5
).
Line Shaft
The line shaft that rotates all of the cable drums is continuous through the gear motor
without a coupling. A better interface between the gearbox and the line shaft ensures a
higher degree of safety (see
Figure 5
).
Hydraulic Checking Device (Safety Motor)
A hydraulic checking device, also known as a hydraulic parachute, is separate from the gear
motor assembly and is powered by the line shaft itself (see
Figure 5
).
When the wall is traveling downwards, this hydraulic checking device builds up a certain
hydraulic pressure that is dependent on the wall’s travel speed. In normal operation, the
pressure is very low, thus the checking device offers no appreciable braking force on the
wall. If the wall speed becomes substantially higher than normal, the checking device offers
sufficient braking force to lower the wall at a speed of approximately 150% of the normal
operating speed.
Electrical Control Box
Skyfold’s electrical control box meets Underwriters Laboratories (UL), Canadian Standards
Association (CSA) and European Conformity (CE) requirements. The enclosure itself is
constructed of heavy-gauge steel. It is typically located within 15 feet (4.5 meters) of the
motor unit and is accessible via an access panel in the ceiling. For warranty protection, it has a
manufacturer’s seal, thereby deterring unauthorized tampering.
There is a main power switch on the cover of the electrical control box (see
Figure 5
).
In the event that your Skyfold wall does not operate at all, verify that the main power
switch is in the ON position. Any other type of maintenance or repair work must be
performed by your authorized local Skyfold dealer. Unauthorized work will void the
Skyfold warranty, as stated in the warranty section of this owner’s manual. In case of a
system failure or fault, the illuminated push button will repeatedly flash one to ten times
while activated. The number of flashes is representative of the error encountered (fault
code). If equipped with the optional touch screen operator station, the touch screen
will display a written fault code. The fault code must be relayed to the Skyfold dealer in
order for them to take the necessary action.
