VC220pmi
Warranty
Digital Volume Control
Knoll Systems warrants its products sold in the USA and Canada by
authorized Knoll 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 Knoll
Systems and found to be defective by Knoll Systems within the
warranty period will be repaired or replaced at Knoll Systems option,
at no charge. Knoll 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.
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 Knoll VC220pmi digital volume control attenuates stereo
speaker signals in 17 steps. It contains Powermatch
circuitry allowing
connection of up to eight VC220pmi’s to a receiver. A non Powermatch
version, model VC220 is available. The VC220pmi includes mute and start-up
functions. The VC220pmi is controlled with a VC201, a RB8 remote control
(requires a VC201i keypad). Up to three VC201 (not VC201i) keypads can be
connected (daisy chained) to a VC220pmi. The VC201i keypad contains an
internal infrared receiver (no extra wiring is necessary) to control the stereo
and other systems. The VC220pmi requires a 12VDC power supply, is usually
wall-mounted and works best if mounted vertically.
The VC201 and VC220pmi have no user replaceable parts.
L
R
Digital Speaker
Volume Control
syste ms
VC201i
Ro om 1
Room with stereo
VC220pmi
2 conductor speaker wires
from amp to VC220pmi
2 conductor speaker wires
from VC220pmi to speakers
Stereo or
Receiver
Speakers 4-16 o hm
8 conductor
cat 3 or cat 5 wire
12vdc power supply plugged
into stereo switched outlet
Note :
Speaker and power
supply wires can be looped
from VC220pmi to VC220pmi
Basic System Layout and Pre-Wiring
:
See “Typical Wiring Diagram” on
the back page. The VC220pmi 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 VC220pmi’s can be connected to a single amp or
receiver (that has 4 ohm capability). Only one VC201i can be connected to a
single VC220pmi.
Use the standard T568A wiring practices to run a cat 5 or cat 3 wire from the
keypad or controller to the VC220pmi. If more than one keypad controls a
single VC220pmi daisy chain the wire from keypad to keypad. If the
VC220pmi(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 VC220pmi(s) for the power
supply, the infrared system and future upgrades such as paging override.
From each VC220pmi 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 VC220pmi 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 VC220pmi, 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.
Knoll Systems
145 Tyee Drive Point Roberts, WA 98281
If the VC220pmi(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 VC220pmi(s).
12140 Horseshoe Way Richmond, BC V7A 4V5
tel (604) 272 4555, fax (604) 272 5595
www.knollsystems.com
Made in Canada
VC220pmi
1999-2007 Knoll Systems All Rights Reserved
