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 #1 limit switch adjustment socket. 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. 6). If necessary, however,
“up” position may be adjusted by turning the #2 limit switch adjustment socket. 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 3mm 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.
220V 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 220V Multiple Station Control
Switches are similar in appearance to 220V 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 with wall
switches, RF or IR remote.
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
(220V)
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).
JUNCTION BOX
UP LIMIT
DOWN LIMIT
Fabric Roller Adjustment Setscrew
Figure
(2)
Electrical Connections
Unit operates on 220V AC current. The AeroLift 35 is shipped closed, with a
temporary field connection provided in the form of a pigtail temporarily wired
to the unit. After hanging the unit, make sure power is off and use this pigtail to
temporarily connect the unit to power and to a switch, so the unit can be lowered
to allow access inside.
Please note: Make sure electrical supply has been disconnected before
attempting to connect AeroLift to electricity.
Terminal strip for field connections is located inside a junction box on the end
of the unit. Unit is shipped with internal wiring complete to the terminal strip.
Once the unit has been lowered,
turn off power
and remove the J-box cover.
The terminal strip is attached to the cover. Disconnect temporary pigtail from
unit, then complete permanent wiring to electricity and to switches. Wire to
connect unit to power supply and to switches should be furnished by installer.
Connections should be made in accordance with wiring diagram, and wiring
should comply with national and local electrical codes. All operating switches
should be “off” before power is connected. AeroLift should be operated and
checked prior to installing projector and/or optional ceiling closure.
