Limit Switch Adjustments
CAUTION: Be sure all switches are in “off” position before adjusting limit switches
Always be prepared to shut lift off manually when new adjustment is being tested.
Limit switches for the AeroLift 35 are preset at the factory. The “Up” (closed) limit switch
is set for fully closed. The “down” (show) limit switch is set for fully lowered. Once unit is
in place, the “down” limit switch may need to be changed to stop the AeroLift 35 closer
to the ceiling (that is, to raise the “down” position). Limit switches are located on the end
of roller, and are accessible by removing the cover of the junction box at the left end of
the unit. To adjust the limit switches, use a 5/32" screwdriver/allen wrench.
Caution: It is not uncommon to overheat the motor during initial installation
when setting limits. The motor is thermally protected and will stop working until it
has cooled to a safe temperature before it will start operating again. DO NOT
physically pull the unit down when this occurs.
Adjusting “Down” (SHOW position)
“Down” position may be adjusted by turning the DOWN limit switch adjustment socket
(see Fig. 2 below). Turning the socket clockwise will stop the AeroLift 35 closer to the
ceiling. Turning it counter-clockwise will cause the lift to stop at a lower point.
Adjusting “Up” (CLOSED position)
Because the “up” (“closed”) position is preset at the factory, Draper does not recommend
changing this position using the limit switch. The “up” position of the closure may be
changed by changing the length of threaded rod (see Fig. 5). If necessary, however,
“up” position may be adjusted by turning the UP limit switch adjustment socket (see Fig.
2 below). Turning the socket counterclockwise creates a higher, or more fully closed
position. Turning it clockwise creates a lower ‘UP” (closed) position.
Caution: Make sure limit switch is set so that the AeroLift 35 motor is NOT still
running after the lift is closed. If it continues to cycle once the lift is closed, a
failure may occur, making the unit descend rapidly and causing damage and/or
injury.
Please Note: If load is off-center of pan, you may need to adjust the pitch of the
fabric rollers. One setscrew is provided on each end of both fabric rollers (see
above drawing). Use these to adjust roller pitch to keep entire fabric panel taut, so
load is evenly distributed. Use
1
/
8
" hex key to adjust.
Operation
When unit is first operated, be cautious! If unit fails to operate when the switch
is flipped “down”, return switch to “off” and re-check electrical connections
before proceeding. Cycle unit down and up several times to confirm satisfactory
operation.
110-120V Single Station Control
3-position up-off-down switch permits operation to be stopped at any point. Factory
adjusted limit switches automatically stop AeroLift when fully down or fully up.
Optional 110-120V Multiple Station Control
Switches are similar in appearance to 110-120V Single Station Control. AeroLift
stops when switch is released and may be restarted in either direction. Factory
adjusted limit switches automatically stop AeroLift when up or fully down.
Optional 24V Control
Three-button up-stop-down switches stop at any point desired, operate in any
sequence. Factory adjusted limit switches automatically stop AeroLift when fully up
or fully down.
Optional Infrared or Radio Frequency Remote Control
If ordered, a three-button transmitter is provided, with “up”, “down” and “stop”
buttons. Unit starts up or down when appropriate button is pressed, and may be
stopped by pressing “off” button. Factory set limit switches stop unit automatically
when projector is in “show” position. Multiple Station Control required for this
option.
Optional RS232/Ethernet
Serial communication and network communication optionally available.
Optional Key Operated Switching
Two kinds of key-operated switches are optionally available with this unit.
1 The key-operated power supply switch controls power to the AeroLift 35 and
switches. When it is “off”, the switches will not operate lift. Key may be removed
from the switch in either “on” or “off” position.
2 A three-position key switch permits the AeroLift 35 to be
operated directly by key.
In this case, the screen’s operator must always have a key
.
AeroLift 35 by Draper, Inc. page 2 of 4
Testing the Safety Limit Switches
The AeroLift 35 are equipped with two Safety Limit Switches (see "AeroLift—
Limit Switch Adjustment (Bottom View)" diagram on page 3). These switches
may be damaged during shipping or by rough handling on the job site.
Once the AeroLift has been installed in the ceiling, but
before the projector and closure are attached, the Safety
Limits must be tested.
Use a screwdriver or other tool to press and hold the limit switch. While hold-
ing down the limit switch, have someone operate the unit. If the unit runs up
while the limit switch is depressed, the limit switch is broken and must be
replaced. Operating the unit without a functioning Safety Limit Switch could cause
the unit's motor to continue operating after the lift is closed, leading to a failure and
the possibility of damage or injury. Make sure to test BOTH switches.
Please Note: As weight is applied to the AeroLift, the projector plate may
shift slightly. If this occurs, use setscrews on bottom of fabric roller brackets
to compensate for shift and level projector plate (see page 3).
Figure C
JUNCTION BOX
UP LIMIT DOWN LIMIT
Fabric Roller Adjustment Setscrew
