Knoll VC220PI Installation guide

Brand: Knoll

Model: VC220PI

Category: Musical Instrument Amplifier

Type: Installation guide

VC220pi

Digital Volume Control

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

receiver or amplifier is turned on. The plug on the end of the 12vdc power supply needs

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

L R

Digital Speaker

Volume Con trol

syst ems

VC200

Room 1 Room with stereo

VC220p m

2 conductor speaker wires

from amp t o VC200pm

2 conductor speaker wires

from VC2 00pm to speakers

Stereo

Speakers 4-16 oh m

8 conductor

cat 3 or cat 5

wire

12vdc power supply plugged

into stereo switched outlet

Typical

Wiring

Diagram

Note:

VC220p m can be

located in a remote

closet, electrical room etc.

Note:

Speaker wires from

amp to VC220pm and for

12Vdc are looped t o

multiple VC220pm’s

Start mute and

boot-up level

shunts

Knoll VC220PI Installation guide

Brand: Knoll

Model: VC220PI

Category: Musical Instrument Amplifier

Type: Installation guide

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Knoll VC220PI Installation guide

Knoll VC220PI Installation guide

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