M&S Systems MC350A Instrucciones de operaciones descargar pdf (Pagina 4)

DEVELOP THE JOB ESTIMATE

It is critical that you determine the complexity of each retroﬁ t

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

predict all the unique situations you will encounter in the ﬁ eld.

For this reason M&S Systems recommends you visit each

retroﬁ t site prior to developing a job estimate and ordering

equipment. During this on site 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 ﬂ ush mount.

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

installation situations might exist, including:

✔ Electrical running through the wall housing

✔ Telephone wires running through the wall housing

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

spacing

✔ 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 1-800-421-1587 for assistance.

✔ A remote transformer

✔ A remote door chime

The answers to the above information will help you scope,

price, and install the retroﬁ t system.

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 22 AWG twin pair

shielded wire with drain wires (Belden 7838A, Belden 9184,

or equivalent). This wire will work for both 3-wire 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 120 VAC running through the existing wall

housing, have a qualiﬁ ed electrician reroute the 120 VAC around the

wall housing.

If you encounter a remote transformer, an additional electrical

run may have to be made by a qualiﬁ ed electrician to power

the DMC3-4 Master Station and/or optional DMCMP3 CD/

MP3 player. Also check to make sure that the area around

the housing is clear of any additional 120 VAC runs or other

obstructions.

Retroﬁ t Frame Reference

• DMCFM – Replacing a master only system with a

DMC3-4 Master Station

• DMCFC – Replacing a combination system with a

DMC3-4 Master Station and a DMCMP3 player

• DMC1F – Replacing a master only system with a

DMC3-4 Master Station and a DMCMP3 player

(requires the hole in the wall to be made larger)

• DMCFR – Used on all indoor room station

replacements

• DMCFRW – Used on all outdoor or high sun area

ﬂ ush mount room station replacements

• DMC1HRWS – Used on all outdoor surface

mount room station replacements

• DMCFD – Used on NuTone door station

replacements, not required for M&S replacements

Retroﬁ t Installation Reference

• The DMC3-4 is for retroﬁ t intercom installations

replacing 3-wire, 4-wire, and 5-wire intercom

systems.

• 6-wire, 7-wire, & 8-wire retroﬁ t intercom

installations require using the DMC1 Master

Station and DMC1 room and patio stations.

• Please refer to Appendix A in the back of this

manual for a table showing which Linear DMC

conﬁ guration to use when retroﬁ tting various older

models of NuTone and M&S Systems intercoms.

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M&S Systems MC350A Instrucciones de operaciones Pagina 4

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