SVS
Lifts![]() Frequently Asked Questions |
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2.
How many positions does
a SVS Lift
have?
3. How is the projector/flat
panel display
attached to the SVS Lift?
4. Is there a cable
management
systems for the projector cables on SVS Lifts?
5. How do I control a SVS
Lift?
6. What safety features do SVS
Lifts have?
7.
What are the advantages of
purchasing a SVS Lift?
8. What is the minimum
ceiling opening
I need for a SVS Lift?
9. What is the different between
the Mini 4
2X2 Lift Series and the Mini
4 Standard Lift Series?
10. What is the normal lead
time for a
SVS Lift?
11. Which SVS Lifts can I use
with a 2X2
ceiling grid?
12. How do I connect my SVS
Lift to an
external controller?
13. How do I adjust the Accessory
#4 or #5
Power Sensor on my SVS Lift?
| Please Email comments to SVS Sales | Copyright SVS, Inc. 2008 All Rights Reserved |
| 1. Which SVS Lift will work best for my installation? This
assesment is based on the following information:
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2. How many positions does a SVS Lift have? All
SVS Scissor Lifts feature three positions:
SVS Plasma
One,
Plasma Two, & LCD-1S Lifts have two positions:
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3. How is the projector/flat panel display attached to the SVS Lift? Projectors
can be
attached to the lift using an Accessory #9 Projector
Mount if the
projector is to be inverted. If there is no projector
mount available
or the projector is not inverted, the projector can be
placed on an
Accessory #13 Platform (a metal
shelf used to support projectors or other equipment).
Flat
panel displays can be attached to the lift using an
Accessory PMT-9
Flat Panel Display Mount.
The SVS
LCD-1S
is supplied with a mounting bracket (included with the
lift) that
will accomodate most projectors.
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4. Is there a cable management system for the projector cables on SVS lifts? For SVS Scissor Lifts
with
lowering distances less than 15-feet, SVS Lifts feature
Cable
Retainers located
in the rear of the lift to keep the projector cables out
of the way
during lift operation.
For SVS Scissor Lifts with lowering distances of 15-feet or more, SVS Lifts feature a Cable Retractor System. The Cable Retractor is a spring-loaded reel located in the rear of the lift that allows automatic cable release as the lift lowers or gathering as the lift is raised. |
5. How do I control a SVS Lift? SVS Scissor Lifts are
supplied with a standard wall plate controller
(24VAC) with a three position (Off/Service/Show) key
switch & a
toggle switch to raise & lower the lift.
To operate the lift in the Show mode, turn the key switch to the Show position and press the toggle switch down to lower the lift to the Show position. To operate the lift in the Service mode, turn the key switch to the Service position and press the toggle switch down to lower the lift pass the Show position to the Service position (its maximum lowered position).The lift can be raised in either the Show or Service modes by pressing the toggle switch up SVS Lifts can be easily integrated with external control systems for seamless automation. SVS also provides a series of optional electronic power sensing & triggering accessories for integrating the operation of the lift with the projector, screen, or other equipment.
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6. What safety features do SVS Lifts have?
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8. What is the minimum ceiling opening I need for a SVS Lift? The minimum
recommended ceiling opening for SVS Lifts are:
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9. What is the different between the SVS Mini 4 2X2 Lift Series and the Mini 4 Standard Lift Series? The Mini 4 2X2 Lift
Series is designed
to be used with 2X2 ceiling grids. The Mini 4 2X2 Lift
Series is
normally sold as a package including
the Mini 4 Series Lift, Accessory
#16 Compact Cable Management, and a M4#1A 2X2 Ceiling
Closure. The
M4#1A Ceiling Closure comes in two
sizes to accomodate 9/16" or 15/16" ceiling grids. The
2X2
ceiling grid limits the size of the projectors that can
be used with
the Mini 4 2X2 Lift Series. |
10. What is the normal leadtime for a SVS Lift? All SVS Lifts
are
built-to-order. The standard production lead time
averages from 2 to 2
1/2 weeks (possibly longer depending on the production
schedule). Large
or custom orders may require longer lead times as well. |
11. What SVS Lift can I used with a 2X2 ceiling grid? You
can use
either the SVS TL1 (2X2),
SVS M2X or Mini 4
(2X2) Series Lifts with 2X2 ceiling
grids. |
12. How do I connect my SVS Lift to an external controller? SVS
Lifts
are
control with 24vac contact closure. To contect to an
external controller please see these drawings: For 110V lifts at the wall plate control terminal strip the control wires are:
The
lift is
lowered to the Show position by connecting the white
wire to the
brown wire
For 220V lifts at the wall plate
control terminal strip the control wires are:
The
lift is
lowered to the Show position by connecting the white
wire to the
black wire
The lift is lowered to the Service position by
connecting the white wire to the greem wire
The lift is raised by
connecting the white wire to the red wire.
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13. How do I adjust the Accessory #4 or #5 Power Sensor on my SVS Lift? Keep the wall plate
controller key
switch in the Service position when plugging the Wall
Plate Controller
cable into the lifts gray control box. This will prevent
the power sensor from immediately activating the motor
and defaulting
to the Up position. The power sensor will
operate in both the Auto and Off key switch positions.
The power sensor circuit is designed to monitor the current that is supplied to the projector, and lower the lift to the Show position when the projector is turned on. The power sensor will trigger a relay on the motor control board when the current exceeds a preset level. The power sensor has a variable resistor on the wall plate controller to adjust the current trigger level. The power sensor is factory adjusted to lower the lift when the current exceeds .9 amps (100 watts). This setting will work for most projectors, but can be adjusted for your projector if necessary. The proper field adjustment should be done with the Wall Plate Controller key switch in the Auto position, the projector plugged into the power outlet on the lifts gray control box, the lift plugged into wall power, and no video signal present. The current should be approximately 150 to 800 watts. Turn the variable resistor located on the Wall Plate Controller clockwise until the lift lowers to the Show position. This sets the trigger level at the exact current that the projector is using. Turn the variable resistor clockwise approximately three more turns to set the threshold below the normal projector current. The variable resistor has thirty turns end-stop to end-stop for accurate adjustment. If you have a high impedance digital voltmeter, you can monitor the approximate 1.1 VDC that is required to turn on the transistor and trigger the lift to lower when the projector is turned on. Connect one voltmeter lead to the Violet wire and the other voltmeter lead to the Black wire of the variable resistor at the wall plate controller. Note: If the three turns are not adjusted away from the threshold level, the relay will not latch and the lift will not go up or down until the relay sees an increase in the pull up voltage. If
screen control is used, see the schematic
and Wall Plate Controller
pin out description.
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14. How do I adjust the Show position on my SVS Lift? POSITIONING Using the Key Switch Controller, lower the lift (with Key Switch in Service position) to where your Show position. The Show microswitch is adjusted by loosening the thumb screw on the Show microswitch bracket, located on the lifts top frame. Position the bracket along the roller guide so that the microswitch touches the large retainer washer. You should be able to see or hear the microswitch on the bracket compress and make contact. Make sure the microswitch is not positioned too close to the washer because the washer must pass under the microswitch when going to the Service position. OPERATION OF SHOW POSITION
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15. Are SVS Lifts Underwriters Laboratories (UL) listed? SVS
Lifts
are
not
Underwriters
Laboratories
(UL) listed. A list of UL
listed parts are available for SVS Scissors Lifts,
Plasma One Lifts,
and Plasma Two Lifts
and for the SVS LCD-1S Lift.
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16. How fast do SVS scissor lifts lower/raise? SVS
scissor
lifts
lower/raise
at
the
speed of one inch per second. For
example the SVS Mini 4-6 lift has a lowering distance
of six feet or
72-inches. For the Mini 4-6 lift to travel from the
raised position to
the service position would require 72 seconds or 1
minute 12 seconds.
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17. How much projector cabling do I need for SVS scissor lifts? SVS
scissor
lifts
require
1.4
feet
of projector cabling per foot of
lowering distance. For example the SVS Mini 4-6 has a
lowering distance
of six feet and would require 8-feet 5-inches of
projector cabling. Not
applicable to the Mini 4 2X2 series Lifts.
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18. Where do I find the Lift Model and Serial Number on my SVS scissor lift? The Lift Model and Serial Number can be found on the Lift Identification Tag located on the left side of the lift's lower frame. The Serial Number is also written on the bottom of the lift control box attached to the lift's top frame. |