Knoll VC220PI Installation Instructions

Installation Instructions Warning: To be installed and/or used in accordance with appropriate electrical codes and regulations. Caution: Do not install these keypads in an electrical junction box with 110V or higher unless an approved barrier separates the high and low voltage sections. Description: The Knöll VC220pi digital volume control attenuates stereo speaker signals in 17 steps. It contains Powermatch circuitry allowing connection of up to eight VC220pis to a receiver. A non Powermatch version, model VC220 is available. The VC220pi includes mute and start-up functions. The VC220pi is controlled with a VC201, a RB8 remote control (requires a VC201i keypad) or an external controller such as the VCI-28 interface. Up to three VC201 (not VC201i) keypads can be connected (daisy chained) to a VC220pi. The VC201i keypad contains an internal infrared receiver (no extra wiring is necessary) to control the stereo and other systems. The VC220pi requires a 12VDC power supply, is usually wall-mounted and works best if mounted vertically. Basic System Layout and Pre-Wiring: See “Typical Wiring Diagram” on the back page. The VC220pi makes a noticeable “click” sound when changing volumes. We suggest mounting it in a low voltage panel, electrical room, closet, etc. From one to eight VC220pi’s can be connected to a single amp or receiver (that has 4 ohm capability). Only one VC201i can be connected to a single VC220pi. The VC200 keypad does not work with the VC220pi. Use the standard T568A wiring practices to run a cat 5 or cat 3 wire from the keypad or controller to the VC220pi. If more than one keypad controls a single VC220pi daisy chain the wire from keypad to keypad. If the VC220pi(s) are not located next to the stereo, run a single eight-conductor cat 3 or cat 5-wire run from the stereo to the VC220pi(s) for the power supply, the infrared system and future upgrades such as paging override. From each VC220pi run a fire rated two-conductor speaker wire to each speaker. To save time and money, most installers run a four-conductor speaker wire from the VC220pi to the closest appropriate speaker and then run a short two-conductor speaker wire to the other speaker. If there is more than one pair of speakers connected to a single VC220pi, the speakers can be wired in series or parallel whichever makes the impedance closest to 4 or 8 ohms. Do not attempt to make the final combined speaker impedance less than 4 ohms. If the VC220pi(s) are not located next to the stereo, run a single fire rated four-conductor (or two two-conductor) 14-18 gauge speaker wire from the stereo to the VC220pi(s). Connecting VC201/VC201i keypads to VC220pi controllers: Use a single cat5 wire using all eight conductors (usually run inside a wall). Always use standard T568A Cat 5 wiring practices (shown below). Use the correct wire pairs. Polarity is VERY important! The stereo signal is not routed to the keypad, just the digital control signals. Signals from an infrared receiver (if used) are routed down the same Cat 5 wire. If more than one keypad (VC201, not VC201i) is to be connected to a VC220pi controller, the wires to the keypads are paralleled. VC201i keypads are connected to VC220pi controllers, the same as other keypads, the only difference is extra power supply and IR emitter wiring are required (see Infrared connection diagram below). Connection to Stereo Equipment: Remove the VC220pi eight-position speaker connector. The stereo amplifier or receiver outputs (left and right) are connected to the VC220pi connector labeled “TO AMP”. Be very careful to observe the correct polarity. The VC220pi uses independent floating grounds so bridged amplifiers can be used safely. ***The VC220pi is rated for use with maximum 120 watt per channel amplifiers. DO NOT use higher-powered amplifiers with this product for safety reasons.*** Up to eight VC220pi controllers can be connected to a single amplifier or receiver if it rated for 4-ohm use. If the amplifier or receiver is rated for 8-ohm use, up to three VC220pi controllers can be connected. Wire from the amplifier speaker terminals are always wired in parallel to the VC220pi controllers “TO AMP” terminals either by stripping and soldering, using a speaker wire paralleling board (our model WT6), or daisy chaining from one VC220pi connector to the next VC220pi connector etc. Connect all VC220pi’s to amplifier speaker A or speaker B terminals, but not both. Wire the VC220pi connectors labeled “SPEAKER” directly to the correct speakers, again strictly observing polarity. Power Requirements: The VC220pi needs a 12vdc power supply. The VC220pi controller also supplies power to the keypads. A maximum of 60mA is needed for each VC220pi. If possible, connect the 12vdc power supply to the switched outlet on the rear of the amplifier or receiver. This wiring causes the VC220pi to reset to its selectable “boot up” every time the brown 8 white/brown 7 orange 6 white/blue 5 blue 4 white/orange 3 green 2 white/green 1 Stereo 12VDC power supply plugged into stereo switched outlet POWER INFRARED +12V G 12V SIG Infrared emitter(s) 12VDC power supply plugged into power full time + - + - VC220/VC220pm

to be cut off and discarded. The wire is stripped off and connected to the VC220pi terminal labeled +12V and G (ground is the negative terminal). To connect more than one VC220pi to a receiver, daisy chain the 12vdc power supply wires to the other VC220pi controllers. If one 12vdc power supply powers both the VC220pi and the VC201i infrared receiver, wire the unswitched 12VDC supply to the “POWER” +12V and G terminals on the VC220pi, then run a jumper wire from the “POWER” +12V to the “INFRARED” 12V terminals. Installer Selectable “BOOT UP”: The VC220pi allows the installer to select how the volume control “boots up” when it first receives 12vdc power. If this feature is required, be sure to plug the 12vdc power supply to the switched AC outlet on the rear of the receiver or amplifier. The VC220pi default is start muted when the 12VDC power is first turned on. •To always start muted and in the lowest volume step (off) make sure the right side shunt on the VC220pi controller labeled "start muted" is in place. •To always start up in a quiet position #6 (of 17). Remove the right shunt labeled "start muted" and make sure the left shunt labeled "#12 #6" is in place. •To always start up in a louder position #12 (of 17). Remove the right shunt labeled "start muted" and remove the left shunt labeled "#12 #6". •To restore the boot up defaults, replace the appropriate shunts. Operation: The Knöll digital volume control is very easy to use. It has a total of 17 different volume settings. Volume settings only affect the room that they are in. After the stereo is turned on, you may or may not have sound depending on how the system was set up during installation. To increase the volume (in this room only), push the rocker button up. Hold the button up continuously and the volume will increase until maximum. To lower the volume, push the rocker button down. Hold the button down continuously and the volume will decrease until it mutes. At any time firmly press the center of the switch to mute the volume. To restore the volume press the rocker button up or down. The RB8 remote control source buttons do not work on the VC201/VC220pi as it has no source selection capabilities. If infrared emitters where installed other (source) remote controls aimed at the VC201i keypads will control the source components. On VC201 keypads the lower led indicates that power to the system has been switched on. The six side leds show the relative volume. When in mute (center of rocker has been pushed) one of the side leds blinks. To restore the volume press the rocker button up or down. Note: If the stereo is on and the Knöll digital volume control has lost power, it defaults to position #12. Warranty Knöll Systems warrants its products sold in the USA and Canada by authorized Knöll dealers to be free of defects in materials and workmanship. This warranty extends for two full years from the date of purchase by the original consumer. Any products returned to Knöll Systems and found to be defective by Knöll Systems within the warranty period will be repaired or replaced at Knöll Systems option, at no charge. Knöll Systems will not be responsible for the actual cost of installation or removal of the product, nor for any incidental or consequential damages. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation may not apply to you. This warranty gives you specific legal rights. You may have additional legal rights that vary from state to state. The VC200, VC201 and VC220pi have no user replaceable parts. Knoll Systems 145 Tyee Drive Point Roberts, WA 98281 11791 Machrina Way, #120 Richmond BC V7A 4V3 tel (604) 272 4555, fax (604) 272 5595 www.knollsystems.com Made in Canada VC220pi  1999-2000 Knoll Systems All Rights Reserved L R Digital Speaker Volume Control syst ems VC200 Room 1 Room with stereo VC220pm 2 conductor speaker wires from amp to VC200pm 2 conductor speaker wires from VC200pm to speakers Stereo Speakers 4-16 ohm 8 conductor cat 3 or cat 5 wire 12vdc power supply plugged into stereo switched outlet Typical Wiring Diagram Note: VC220pm can be located in a remote closet, electrical room etc. Note: Speaker wires from amp to VC220pm and for 12Vdc are looped to multiple VC220pm’s Start mute and boot-up level shunts