Niles VCS-2D Istruzioni operative originali

VCS-2D

INSTALLATION & OPERATION GUIDE

MODEL

VCS-2D

PREMIUM STEREO VOLUME CONTROL

VCS-2D

DS00101C/VCS-2D 2/5/99 1:32 PM Page 12

Introduction

The VCS-2D is a wall-mount, Decora®style speaker volume

control. It connects between the speaker-level output of an

amplifier, speaker selector, etc. and a pair of speakers.

A perfect application for the VCS-2D is adjusting the volume

of remotely located speakers.The VCS-2D adjusts the volume

of speakers connected to it by attenuating the amplifier signal.

Niles volume controls use autoformers instead of L-pads for the

volume controlling element. This assures minimal internal

power dissipation with virtually no power wasted as heat.

Features and Benefits

The VCS-2D offers a number of improvements over other

volume controls.

●Interchangeable Decora-style inserts for fast, easy color

change. Inserts and knobs (sold separately) are available

in a variety of colors.

●The VCS-2D uses a 12 position control, which is superior

to 10 position designs. You get a broader range of adjust-

ment—there are 10 steps of attenuation instead of 8.

TABLE OF CONTENTS

Introduction 1

Features and

Benefits 1

Installation

Considerations 3

Installation 8

Operation 10

Specifications 10

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VCS-2D

Premium Stereo

Volume Control

DS00101C/VCS-2D 2/5/99 1:32 PM Page 1

Steps 11-6 attenuate -3 dB per step; steps 5-2 are -6 dB

per step. Step 12 is “full-on” and step 1 is “full-off”.

●Greater dynamic range—you get 42 dB of total attenua-

tion instead of the typical 20 or 30 dB.

●POP-FREE switching between all steps.

●100% tested, electronically and acoustically, for frequency

response, distortion and power handling.

●The connectors on the VCS-2D are removable and

accommodate up to 14 gauge speaker wire. The

connectors simplify your installation:

• The speaker wires are easier to attach—no heavy

control to hold onto.

• The control may be removed without disconnecting

any wiring.

• ”Wire-Guard” barriers between each connector

terminal reduce the chance of a short-circuit.

●Mounting depth of only 2 9/16”. Fits into standard 18cu.in.

1-gang electrical boxes.

●Printed circuit board construction uses no hand wiring,

assuring high reliability.

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DS00101C/VCS-2D 2/5/99 1:32 PM Page 4

●Isolated left and right channel grounds make it safe for

use with any amplifier.

●May be used with 4, 6, or 8 ohm speaker systems.

●Ideal for both home and commercial sound installations.

●Only screwdriver and wire stripper required for installation.

●Power handling: 60 watts/channel peak music power.

●Frequency response: 20 Hz to 20 kHz ±1.2 dB.

●Available colors: White, Bone, Almond, or Black.

●Ten year parts and labor warranty.

●Proudly made in the USA.

Installation Considerations

The VCS-2D is a Decora-style module and is designed to

use standard Decora-style faceplates and mounting

hardware. Decora faceplates (up to 6-gang) with color-

matched plate screws are available from your Niles dealer.

P-Rings and Electrical Boxes

The mounting depth of the VCS-2D is 2 9/16”. When

installed, the unit extends 2 1/16” behind the sheetrock wall

(assuming 1/2” sheetrock). For installation, you must choose

between a standard light switch plaster ring (p-ring) or a

standard 18 cu. in. (or larger) electrical box. Suitable p-rings

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*Only required if changing color of unit.

TOOLS REQUIRED

• No. 2 Phillips

Screwdriver

• 1/8" Standard

Slotted Screwdriver

• 1/4" Standard

Slotted Screwdriver

• Wire Stripper

• 5/64" Allen Wrench*

DS00101C/VCS-2D 2/5/99 1:32 PM Page 5

and electrical boxes are available from your Niles dealer or

local electrical supply company. Using the p-ring is best

because it gives you unobstructed access to the full depth

of the wall. In some instances, the use of a p-ring may be

inappropriate, such as in a retro-fit (existing) installation, or

when building codes require that wall devices be enclosed

in electrical boxes. Contact your local building code and

inspection department if unsure.

Type of Speaker Wire

For most applications, we recommend you use 16 or 18

gauge, stranded copper speaker wire for the VCS-2D con-

nections. For wiring runs longer than 80 feet, 14 gauge wire

is recommended. Using speaker wire larger than 14 gauge

for the VCS-2D connections is not recommended—the

wire may not fit into the connectors. Never use solid-core,

aluminum, or “Romex” type wire with the VCS-2D. When

running speaker wires inside walls, most states and munici-

palities in the U.S. specify that you must use a special type

of speaker wire. Usually, the requirement is that the wire

has a specific “CL” fire rating, such as “CL-2” or “CL-3”.

Consult your Niles dealer, building contractor, or local

building and inspection department if unsure about which

type of wire is best for your application.

VCS-2D Mounting Location

Convenient mounting locations for the VCS-2D are:

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"Tech Tip"

Wire size is

expressed by it's

AWG (American

Wire Gauge)

number. The lower

the AWG number,

the larger the wire,

i.e., 12 AWG wire is

physically larger than

14 AWG.

DS00101C/VCS-2D 2/5/99 1:32 PM Page 8

●Near entryways or exits

●Near a desk

●At your bedside

●Close to a telephone

●Near other wall controls (see caution next below)

DO NOT INSTALL THE VCS-2D INTO ELECTRICAL BOXES

WITH 110 VOLT DEVICES

Some states or municipalities allow devices such as the

VCS-2D to be installed into the same electrical box as 110

volt devices, provided a “low-voltage partition” is used

between the devices. We do not recommend this. Speaker

wires can act as an “antenna” for electrical noise. Locating

speaker wires too close to a light switch or dimmer may

cause a “popping” or “buzzing” sound to be heard through

the speakers. If you must locate the VCS-2D near electrical

devices, install it in a separate metal electrical box, ground

the box to the electrical system ground, and route the

speaker wires several feet away from the electrical wiring.

Changing the Color of the VCS-2D

The Decora-style insert and knob on the VCS-2D are

removable, allowing fast and easy color changes as needed.

Inserts and knobs are available in a variety of colors. If you

need to change the color of the VCS-2D:

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Figure1

Removing the Knob

DS00101C/VCS-2D 2/5/99 1:32 PM Page 9

1. Obtain the VCS-2D knob and Decora-style insert in the

desired color from your Niles dealer.

2. Holding the VCS-2D control as shown in (Figure 1),

make sure that the knob is turned completely counter-

clockwise, to the off position. Note the current position of

the knob; this will ensure that you install the new knob in

the same position as the old one. Next, using a 5/64” allen

wrench/driver, locate the two set screws on the side of the

knob and carefully loosen both screws until the knob may

be removed. It is not necessary to completely remove the

screws from the knob.

3. Next, holding the control as shown in (Figure 2), locate

the two plastic mounting tabs at the top rear of the Decora-

style insert. Using two fingers, simultaneously press both

tabs down (towards the center of the insert) and forward

(away from you) until the insert pops free from its mount-

ing slots.

4. Locate the new Decora-style insert. Hold the control so

that it is facing you. Insert the two bottom tabs into the

bottom slots first, followed by the two tabs on the top. Snap

the insert into place by carefully pressing on the front of the

insert.

5. Locate the new knob. Place the new knob onto the shaft

and align it to the same position as the old one. Secure the

knob to the shaft by tightening the two set screws on the

side of the knob. Holding the VCS-2D as shown in (Figure1),

check the alignment of the knob by turning it through all

positions. 6

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Figure 2

Removing the

Decora-style Insert

"TECH TIP"

Do not exert

excessive pressure on

the plastic

mounting tabs.

DS00101C/VCS-2D 2/5/99 1:32 PM Page 10

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(a) Electrical Box

(b) Speaker Wire

(d) Snap-on Color Insert (supplied)

(e) Knob (supplied)

(f) Device Screws (2 supplied)

(g) Decora Wallplate (supplied)

(h) Faceplate Screws (2 supplied)

DS00101C/VCS-2D 2/5/99 1:32 PM Page 7

Installation

If you are installing the VCS-2D into an existing wall, take

time to consider any possible obstructions which may be

hidden inside the wall, such as wood and metal studs; elec-

trical, telephone or other types of wiring; plumbing; con-

duit; old wall safes; etc.

1. Install the electrical box or p-ring in the usual manner.

2. Run all the necessary wiring to the VCS-2D. Label the

wires for future reference.

3. Make the connections to the VCS-2D. Locate the con-

nectors for the VCS-2D (remove them if they are plugged

in). Next, strip 1/4” of insulation from the end of each wire.

Tightly twist the end of each wire until there are no frayed

ends. Insert each wire into the appropriate hole on the

removable connector blocks; secure the wiring to the con-

nectors by tightening the small connector screws. Be cer-

tain that proper phasing is observed—connect the positive

terminals on the VCS-2D to the positive terminals on the

amplifier and speakers; the negative terminals on the VCS-

2D to the negative terminals on the amplifier and speakers.

See (Figures 3 and 4).

4. Plug the connectors into the VCS-2D as shown in(Figure 5)

on next page.

The inputs of the VCS-2D are the connector pins

labeled “AMPLIFIER”. The outputs are the connector

pins labeled “SPEAKERS”. Be sure not to reverse these

connections or the VCS-2D will not function properly. 8

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Figure 3

Wiring the Connectors

VCS-2D

Amplifier (Input)

Speakers (Output)

Speakers

Receiver

Figure 4

Wiring Diagram

DS00101C/VCS-2D 2/5/99 1:32 PM Page 6

5. Secure the VCS-2D to the electrical box or p-ring. Insert

the 11/4” long device screws into the oblong-shaped screw

holes on the top and bottom of the VCS-2D. Note that the

oblong shape of the screw holes allow you to position the

VCS-2D so that it is vertical. Position the VCS-2D so that the

screws are aligned with the threaded holes in the electrical

box or p-ring. Tighten the screws using a phillips screwdriv-

er. DO NOT OVER-TIGHTEN. In some instances, you may

need to loosen these screws several turns to allow the VCS-2D

to fit flush with the Decora cover plate. See (Figure 6).

6. Use the shorter plate screws to fasten the Decora faceplate

to the VCS-2D. DO NOT OVER-TIGHTEN THE PLATE

SCREWS OR YOU MAY DAMAGE THE FACEPLATE. Line up

all the screws in the same direction for a finished look.

NOTE: Certain “old work” or “retro-fit” boxes, such as the

Carlon B225R, have a plastic “lip” which interferes with the

Decora faceplate screws. This lip prevents you from being

able to tighten these screws completely. To make the clear-

ance necessary for these screws, you must remove the parts

of the lip causing the interference. There are two ways to

accomplish this:

1. Drill through the lip of the box at the screw points.

2. Cut notches into the lip with a pair of diagonal cutters.

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Figure 6

Loosening the Screws

for a Flush Fit

Figure 5

Installing the

Connectors

DS00101C/VCS-2D 2/5/99 1:32 PM Page 3

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