Step 1: Remove the Old Intercom 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 themaster. 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.
Step 2: Install New Units
Install New Master Housing
The dmc1H and dmc1HC housings aredesigned 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 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.
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. 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. Do not run the 120VAC through the wall housing.
Install New Master Unit
The dmc3-4 ships configured for a 3-wire retrofit system. If you are replacing a 4-wire system you must change the jumper setup on the dmc3-4 master. The jumper change must be completed before any cables are connected. To change the jumpers just pull them off the existing connection and place them in the 4-wire position Suspend the master unit from the wall housing by looping the third hand wire (thick green wire) over the hook at the top of the housing. Be careful not to damage the wall surface. If the dmc3-4 system has more than 9 room stations, some room selector switches will control two room stations. Connect each Green wire (except patio Green) to a single green terminal on the master. Each numbered Green terminal corresponds to a remote station selector switch. Note: No more than 3 Green wires can be connected to any Green terminal and not to exceed 15 speakers for the 4-wire or 13 speakers for the 3-wire system. This limitation does include remote controls and volume controls but not door stations. The station location can be marked on the inside of the door access panel on the left side of the dmc3-4 master. Connect the green wire(s) from the patio station(s) to the Patio green terminal. Connect the patio Black wire(s) to the patio Black terminal. Note: Only two patio stations can be connected to the patio terminals. Connect the Red wire with the other Red wires to the Red terminal. Connect the White wire with the other White wires to the White terminal. Refer to Figure 14 for wire placement. Connect the red and black wires of the door station cables (MS4DCX/MS4DCXSC) to the red and black door speaker terminals on the dmc3-4 master as shown in Figure 15. When using MS4DCXSC shielded wire, insulate the bare wires using some of the jacket material to prevent shorting to the circuit board. Connect this wire to terminal labeled shield. Connect all orange wires from the door stations to the common terminal on the MC3 or MC8. Connect each yellow wire to a note selection terminal. (Do not connect more than one yellow wire per note terminal.) Plug in the modular chime plug to the 4 pin connector labeled as CHIME on the dmc3-4 master unit. Connect the optional dmc1CD player RCA cables and control wire.
Install New Chime Module
Install the optional chime module MC3 or MC8 in the wall housing by pressing the chime module over the 4 plastic standoffs attached to the wall housing. Refer to the instructions shipped with the chime module.
Install Optional CD Changer
Connect the audio cables to the audio outlets of the dmc1CD player. After connecting the audio cables and main cable, connect the power cord from the TE2C transformer to the power connector on thedmc1CD. Ensuring that nothing is between the CD player and the back of the wall housing (including cables), place the dmc1cd player into the lower opening of the finish out frames including the dmc1F or dmcFM frames. Use the screws provided to secure the unit in place.
Step 3: Replacing Room Stations
The DMC room and door speakers use the existing wire and speaker rough-in mounting frames or boxes. To replace the speaker, first remove the old speaker. Leave the existing room or door station mounting rings in place. After removing the room station verify the integrity of the wire run. Then install the mounting plate from the DMCFR (finish-out frame for room stations). Align the plate on the wall either vertically or horizontally so that the screw holes line up with those on the mounting ring or box. Use a level to make sure the plate is level. There are several screw hole locations on the mounting plate so it can attach to many rough-in designs. Mount the plate to the wall using the screws provided.
Next connect the wires to the dmc retrofit room station as shown in Figure 7. Match the wire colors to the corresponding screw locations on the dmc3 or dmc4 room stations. Please make sure to use only dmc3 room stations in a 3-wire installation and dmc4 room stations in a 4-wire installation. **All 6 or 8-wire installations use the DMC1 master and DMC1 room stations.
After connecting the room station to the existing wiring using the diagrams above. Place the room station through the DMCFR plastic mounting plate. Position the plate either vertically or horizontally depending on the room station replaced. Place the room station into the roughin ring and align the frame with the room station as shown in Figure 8. Use the screws provided with the room station to screw the room station and frame into place. The holes in the room station align with the holes in the mounting plate. The room station keeps the plastic frame in place on the wall. Note the plastic frames are paintable. Please prime the plastic first and then apply standard room paint. The white plastic may require two coats of paint to get full coverage. It is recommended that you paint the frame prior to mounting it to the wall.
Step 4: Install Patio Speakers
Do not remove the existing patio speaker rough-in. The DMC retrofit system is designed to fit into the existing enclosure. It is important to note that M&S patio speakers are weather resistant not water proof. M&S speakers should not be located in an area that is in direct line of water from sprinklers, rain or other devices such as power washers. Please use the DMCFRW finish-out frame in outdoor and high sun areas. The DMCFRW plastic is designed to withstand sun and resist fading. If a patio requires a surface mount application use the DMC1HRWS. This is a surface mount box and cover that will support the DMC1RW, DMC3RW or DMC4RW patio speakers. To install a patio speaker follow the instructions presented above for interior room stations.
Step 5: Install Doorbell Speakers
Remove the old door station but do not remove the rough-in box or surface mount box. When replacing a NuTone door speaker you must use the DMCFD finish-out frame. The M&S door station sets in the DMCFD and the screws attach to the existing rough-in. Connect the door station with the corresponding color wires. Screw the door station or door station with DMCFD frame into the rough-in box.
Step 6: Add External Music Sources (iPod, CD..)
The DMC retrofit system supports the use of external music sources. You can use an existing connection or run a new wire to support local source connection. To install a new local source follow the steps detailed in the following paragraphs. Choose a location for the IA30WH that will be easily accessible to the sources that are to be connected to the system (close to the receiver, TV or DVD player for example). Note: the external source wire run to the dmc3-4 must not exceed 50 feet. At this location, attach a single gang box to a wall stud at a center height of normal wall outlets. Use a low voltage plaster ring in existing construction installations.
Make sure the single gang box extends past the wall stud and into the room so it will be flush with the sheetrock when it is applied. Run the Red and Black shielded audio cables (included in the IR30K) from the master unit location to the IA30WH location. Connect the cables.