M&S Systems Dmc3-4 Manuel utilisateur

dmc3-4 Installation

Instructions

dmc3-4

2861 Congressman Lane | Dallas, Texas 75220 | 800.877.6631 | www.mssystems.com

Page 2

Introduction

Designed to update older intercom systems, the dmc3-4 is a whole-

house music communications system that uses your existing intercom

3 or 4 conductor system wire. It is designed to provide years of

enjoyment and service to the homeowner.

M&S audio products are backed with more than 50 years of experience

in the design and manufacture of precision acoustical equipment for

the home. To ensure that the homeowner receives the high-quality

music and voice reproduction that the system is designed to deliver, it

is important that each step of the installation be done carefully. In the

event you need troubleshooting installation assistance, please call our

technical staff at 1-800-366-9422.

Prior to installing the dmc3-4 system, read and observe the Important

Safety Instructions beginning on page 3.

Our web address is www.mssystems.com. The M&S Systems web site

contains additional information that will be of assistance in the

installation and support of the dmc3-4 system and all other M&S

Systems products. Including installation guides, configuration

recommendations, brochures, product specifications and a frequently

asked questions section.

dmc3-4

2861 Congressman Lane | Dallas, Texas 75220 | 800.877.6631 | www.mssystems.com

Page 3

Important Safety

Instructions

READ ALL INSTRUCTIONS CAREFULLY BEFORE

INSTALLING OR USING THE DMC3-4 SYSTEM

THE dmc3-4 MUST BE INSTALLED BY A M&S SYSTEMS DEALER

OR INSTALLER, AND MUST CONFORM TO ALL LOCAL BUILDING

AND ELECTRICAL CODES.

Warning: Always follow these safety instructions.

Retain these instructions for future system reference.

• Read ALL safety and operating instructions before installing the

dmc3-4.

• Adhere to all warnings on the dmc3-4 and in these instructions.

Follow all operating and installation instructions.

• CAUTION: These installation instructions are for use by qualified

personnel only. To reduce the risk of electric shock, do not perform

any servicing other than that contained in the operating instructions

unless you are qualified to do so.

• DO NOT attempt to service the dmc3-4 yourself as opening or

removing covers may expose you to dangerous voltage or other

hazards. Refer all servicing to qualified service personnel.

dmc3-4

2861 Congressman Lane | Dallas, Texas 75220 | 800.877.6631 | www.mssystems.com

Page 4

The lightning flash with arrowhead

symbol within an equilateral

triangle is intended to alert the

user to the presence of uninsulated

“dangerous voltage” within the

product’s enclosure that may be of

sufficient magnitude to constitute a

risk of shock to persons.

The exclamation point within an

equilateral triangle is intended to

alert the user to the presence of important operating and maintenance

(servicing) instructions in the literature accompanying the product.

• Locate the system away from heat sources such as radiators, heat

registers, stoves, or other heat producing products.

• Do not locate the dmc3-4 master or room stations in an outside

wall.

• Do not expose the dmc3-4 to moisture. Doing so can create fire or

shock hazards and impair the warranty.

• Do not place the dmc3-4 master or room stations in any wall cavity

with any other electrical wiring in the cavity.

• Do not expose the dmc3RW, dmc4RW or dmc1RW outdoor patio

speakers to significant water contact. The patio speakers are

weatherproof but not waterproof. Continuous, direct water exposure

will cause system problems.

• Do not attach devices unauthorized for use with this system.

Authorized devices include:

• Audio components connected via a line level input

• dmc1CD 6-disc player

• Use only M&S Systems certified replacement parts and have them

installed by an M&S Systems dealer or installer. Unauthorized

substitutions can result in fire, electric shock, or other hazards.

dmc3-4

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• Upon completion of any service or product repair, have the M&S

Systems dealer or installer conduct a safety check to ensure the

system is in proper operating condition.

• Use only a damp cloth to clean the dmc3-4 master and room

stations. Do not use liquid cleaners or aerosol cleaners.

Cautions: Wiring

• A qualified electrician must run a 120V AC line to the dmc3-4

retrofit transformers.

• Individual wire runs should not exceed more than 350 FEET of wire

from any single room station to the dmc3-4 master or 1000 total

feet for the entire system.

• LABEL all wiring runs. Connecting the wires to the dmc3-4 master,

room station or door stations incorrectly may result in system

damage.

• Run a single cable from the master unit location to each room

station and door station in a “home run” fashion. Do not loop cable

from one room station to another.

• DO NOT STAPLE CABLES! Staples cause shorts.

• DO NOT SPLICE CABLES. Splices are unreliable and defeat the

signal isolation properties of the cables.

• DO NOT RUN ELECTRICAL WIRES THROUGH THE DMC WALL

HOUSINGS. If you encounter 120VAC wires running through a wall

housing during a retrofit you must have a qualified electrician rerun

those wires around the wall housing.

• KEEP CABLES AT LEAST 18 INCHES FROM FLORESCENT LIGHT

FIXTURES, DIMMER CONTROLS, AND ALL OTHER WIRING. This

includes AC wiring, security cable, cordless phone units, and other

control wires. These can cause a “hum” or “buzzing” sound.

dmc3-4

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Page 6

• KEEP cables away from objects such as heating and air conditioning

ducts, metal construction plates, and anything else with sharp

edges that can damage the cables.

Cautions: Room Station Rough-In

Careful consideration should be used when determining the location of

the room stations and master. Since this is a retrofit system you will

not be able to control the location of the existing system. But please

follow the guidelines below if you install any new locations:

• DO NOT install room stations in return air ducts.

• DO NOT install room stations in exterior walls. Insulation materials

will change speaker range and efficiency. Temperature changes in

the wall will reduce speaker life.

• DO NOT install room stations in saunas. They will not withstand the

extreme heat and moisture.

• DO NOT install room stations underneath cabinets or over counter

tops.

• DO NOT install room stations in stud cavities with other wiring or

appliances.

• DO NOT install room stations within 18” of dimmers, fluorescent

light fixtures, security wiring, cordless phone units, and other

control wiring.

• DO NOT install room stations within 10 feet of other room stations

or the dmc3-4 master unit. This will cause acoustic feedback.

• DO NOT install room stations in stud cavities with other room

stations or the dmc3-4 master unit. This will cause acoustic

feedback.

• DO NOT install room stations facing other room stations or the

dmc3-4 master unit. This will cause acoustic feedback.

• DO make sure all mounting rings are level and oriented as shown in

these instructions.

dmc3-4

2861 Congressman Lane | Dallas, Texas 75220 | 800.877.6631 | www.mssystems.com

Page 7

Installation Overview

The dmc3-4 retrofit installation is completed using the following steps:

• Develop the job estimate

• Removal of the old intercom system

• Install the dmc1H or dmc1HC housing

• Replace the room stations (note do not remove the existing

room station mounting rings)

• Install the optional dmc1CD player

• Install the dmc3-4 master and make all room station

connections

• Test the system

The following tools are required for the dmc3-4 installation. The use of

these or other tools is dependent on the existing intercom system

installation:

• #2 Phillips screwdriver

• Wire stripper/cutter

• Tape measure

• Level

• Tin Snips

• Digital Multimeter (dmm)

• Small (or precision size) Philips/Flat head screw driver

• Power drill with 1" auger

• Small Crowbar

• Large Flat head screw driver

• Rubber mallet

• Extension cord

dmc3-4

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Page 8

• Wood chisel

• Dry wall saw

You may not need to use all these tools on each install but having

them handy will make the overall installation process easier.

Develop the Job Estimate

It is critical that you determine the complexity of each retrofit

installation prior to developing the job estimate. It is hard to predict all

the unique situations you will encounter in the field. For this reason

M&S Systems recommends you visit each retrofit site prior to

developing a job estimate and ordering equipment. During this onsite

visit it is recommended that you complete the items listed below:

• Determine the model number and manufacturer of the existing

intercom system.

• Count the number of room, patio, and door stations.

• Determine if the door and patio stations are surface or flush

mount.

• Remove the master from the wall to see if any non-standard

installation situations might exist, including:

o Electrical running through the wall housing

o Telephone wires running through the wall housing

o Stud spacing that varies from a standard 16” on center

spacing

o The type of wire used for room, door and patio station runs

(M&S, NuTone or other such as telephone wire) - If you

encounter non-standard wire contact our Technical

Support team at 1-800-366-9422 for assistance.

o A remote transformer

o A remote door chime

The answers to the above information will help you scope, price and

install the retrofit system.

dmc3-4

2861 Congressman Lane | Dallas, Texas 75220 | 800.877.6631 | www.mssystems.com

Page 9

Removing the Old System

Prior to removing the existing intercom system make sure all power is

turned off at the intercom location. Remove the screws from the

intercom master and while removing the intercom, make sure to

carefully label each wire with its corresponding room location.

Disconnect all the room station and door station wires from the

master. Then carefully remove the existing wall housing and

transformers.

If the existing system was not working prior to replacement, check

each wire run between the room stations and master for shorts and

wiring integrity. If one of these room station to master wire runs has a

short, re-run that wire prior to installing the dmc3-4. When replacing

wire runs use M&S Systems MS4XSC shielded wire. This wire will work

for both 3 and 4-wire installations. On 4-wire installations use the wire

as is and on 3-wire runs do not use the white wire.

Note: if you encounter 120VAC running through the existing wall

housing, have a qualified electrician reroute the 120VAC around the

wall housing.

If you encounter a remote transformer, an additional electrical run

may have to be made by a qualified electrician to power the dmc

master and/or optional CD player. Also check to make sure that the

area around the housing is clear of any additional 120VAC runs or

other obstructions.

Installing the Wall

Housing

The dmc1H and dmc1HC housings are

designed for 16” on center studs. You

may encounter stud spacings that vary

from this standard. Use the dmc1H housing

when you are replacing an existing system

with an intercom only system. The dmc1HC housing is used for

Figure 1– Transformer location

dmc3-4

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Page 10

Figure 2 - dmc1H or dmc1HC wall

housing placement

Figure 3 - Transformer

120VAC/60Hz run

combination systems only – or those that include the dmc3-4 master

and the optional dmc1CD 6-disc CD player.

Locate wall housing dmc1H or dmc1HC (combo). The housing must be

positioned so that the transformers are on the bottom of the wall

housing as shown in figure 1. If you are replacing the existing master

only system with a combination dmc3-4 system you will have to cut

the rough-in opening larger to

accommodate the larger wall

housing. Prior to making the cutout

check the stud cavity for obstructions

or items in the wall that may prevent

the transformers from fitting in the

wall. The dmc1H and dmc1HC

transformers drop in from the bottom

of the housing. Refer to Figure 2 for

wall housing placement.

The wall housing is designed to fit

between 16" on center (OC) studs. In

retrofit applications you may encounter stud

spacing that varies from this standard.

Connect the existing, dedicated 120VAC/60Hz

line with ground connection from the power

panel to the wall housing as shown in Figure 3.

The dmc3-4 requires a dedicated power source

to assure no interference from other equipment

caused by looped power circuits. The ground is

necessary for proper radio reception.

Place transformer enclosure from the inside of the wall housing into

the transformer enclosure opening at the bottom of the wall housing

as shown in Figure 4. Do not run the 120VAC through the wall

housing.

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