SVS Lifts

Frequently Asked Questions



1. Which SVS Lift will work best for my installation?

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?

14. How do I adjust the Show position on my SVS Lift?

15. Are SVS Lifts Underwriters Laboratories (UL) listed?

16. How fast do SVS scissor lifts lower/raise?


17. How much projector cabling do I need for SVS scissor lifts?

18. Where do I find the Lift Model and Serial Number on my SVS Scissor lift?

Please Email comments to SVS Sales Copyright SVS, Inc. 2017 All Rights Reserved




























1. Which SVS Lift will work best for my installation?

This assesment is based on the following information:
    • Projector model and lens
    • Lowering distance needed for Show and Service positions
    • Available space above the false ceiling
    • Ceiling-to-floor distance
    • Finished ceiling type





















2. How many positions does a SVS Lift have?

All SVS Scissor Lifts feature three positions:
  1. Closed position: the lift and projector are concealed in the ceiling when not in use.
  2. Show position: operating position of the projector below the false ceiling. The Show position is adjustable anywhere between the closed and the Service position. The Show microswitch is manually adjusted by loosening the thumb screw on the Show microswitch bracket, located on the upper lift frame.
  3. Service position: maximum lowering distance of the lift to easily service/access the projector.













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).
























4. Is there a cable management system for the projector cables on SVS lifts?

SVS Lifts feature Cable Retainers located in the rear of the lift to keep the projector cables out of the way during lift operation.





























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.
















6. What safety features do SVS Lifts have?

  • Redundant limit switches (two up/two down) for safe and secure motor shutdown.

  • USA patented drum lock systems to ensure safety in event of a mechanical failure (100% safety record after 26 years of manufacturing).

  • The projector weight is suspended by two 3/16-inch steel cables capable of supporting 1780 lbs [807kg] each.

  • The use of channel scissors, heavy steel, grade 5 fasteners and other heavy duty components, combined with the precision grooved drum and other manufacturing techniques ensure safe level, accurate tracking with properly mounted equipment at lowering distances to 33-feet.




















8. What is the minimum ceiling opening I need for a SVS Lift?

The minimum recommended ceiling opening for SVS Lifts are:
(dimensions do not include projector or other accessories which may increase the minimum ceiling opening size. Please
 contact SVS  for the exact ceiling opening for your application.)

  • Mini 4 Standard Series: 23" wide by 29" deep

  • SVS 4 Series: 28.5" wide by 40" deep

  • Mini 5 Seires: 28" wide by 38" deep

  • Mini 7 Series: 38" wide by 40" deep

  • Mini 7EX Series: 43.5" wide by 40" deep

  • SVS 7 Series:

    • up to SVS 7-13: 38" wide by 50" deep

    • SVS 7-15 and above: 41.5" wide by 52.5" deep

  • SVS 7EX Series

    • up to SVS 7EX-13: 43.5" wide by 50" deep

    • SVS 7EX-15 and above: 47" wide by 52.5" deep

  • please contact svs for all other lifts




































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.

The Mini 4 Standard Lift Series can be used with the Accessory #1 or FP1 Ceiling Closures. The Accessory #1 and FP1 Ceiling Closures allow larger projectors to be used with the Mini 4 Standard 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 4 to 6 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 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

For 220V Lifts

For 110V lifts at the wall plate control terminal strip the control wires are:

  • White wire is the common (24VAC supplied by the lift)
  • Red wire is the up
  • Brown wire is down to Show position
  • Green wire is down to Service position
  • Orange wire is the Motor LED positive
  • Black wire is the Motor LED negative

The lift is lowered to the Show position by connecting the white wire to the brown wire
The lift is lowered to the Service position by connecting the white wire to the green wire
The lift is raised by connecting the white wire to the red wire.

        For 220V lifts at the wall plate control terminal strip the control wires are:

      • White wire is the common (24VAC supplied by the lift)
      • Red wire is up
      • Black wire is down to Show position
      • Green wire is down to Service position
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.


















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.

Instructions (pdf format)








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

  • The key switch controller operation for the Show position operates by switching the key switch to Show and pressing the toggle switch down. When the lift reaches the Show microswitch, it will stop.
  • To lower to the Service position, switch the key switch to the Service position and press the toggle switch down. The lift will lower to its maximum drop length, until the down limit microswitch stops the motor.
  • Pressing the toggle switch up works in both the Service and Show position on the key switch. The lift will not stop at the Show position when using pressing the toggle switch up.
Show Adjust Image
Show Position Adjust (PDF)










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.















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.













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.













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.

Copyright SVS, Inc. 2008 All Rights Reserved