NuTone Intercom System IMA 3033 Series Master Station User Manual

INSTALLATION  
INSTRUCTIONS  
RADIO-INTERCOM SYSTEM  
MODEL: IMA-3303 Series Master Station  
This booklet contains information for installing the Master  
detailed information on wiring and mounting other system  
components (i.e. speakers, remote controls, etc.), refer to  
the installation instructions packaged with each separate  
component.  
Station. All system wiring and rough-in frames should be  
installed before mounting and wiring the master station.  
Refer to the installation instructions packaged with the  
rough-in frame for detailed wiring information. For more  
IMA-3303 SERIES REPRESENTATIVE WIRING ILLUSTRATION  
USE THIS DIAGRAM FOR REFERENCE ONLY –  
SEE IR-104 ROUGH-IN FRAME INSTALLATION  
INSTRUCTIONS FOR DETAILED WIRING  
IMA-3303 SERIES SYSTEM  
WIRING DIAGRAM  
MODEL IMA-3303 SERIES  
RADIO/INTERCOM MASTER  
IN IR-104 ROUGH-IN FRAME  
 
(Continued)  
INSTALLATION  
Wire Matching Chart  
1
2
RED  
SILVER  
NuTone has adopted the use of a 3-wire color-coded cable. If  
you are replacing an older model radio-intercom, use this chart  
to match the copper/center/silver designations of older wiring  
with the blue/grey/red-stripe color-coded wire.  
CENTER  
FOR SYSTEMS  
USING 10-13  
BLUE  
COPPER  
SPEAKERS, MAKE  
DOUBLE  
CONNECTIONS TO  
ONLY TERMINALS  
1, 2, 6, 7.  
OLD CABLE  
Wire  
NEW CABLE  
Insulation  
Blue  
6
7
RED  
Copper  
Center  
SILVER  
Grey  
CENTER  
Silver  
Red Stripe  
BLUE  
COPPER  
Connecting the Remote  
Speaker Wiring  
FIGURE 3  
NOTE: All speaker and door wiring must return directly to  
Master unit. Do not connect wiring from speaker to speaker.  
1. Dress all speaker wiring through the oblong wire holes in the  
rough-in frame. All wiring connections are made to the  
Master unit’s terminal board.  
TERMINAL BOARD  
1
2
3
4
5
CN702  
CN701  
RED  
SILVER  
2. Refer to Figure 6. When routing speaker wires through  
rough-in, run wires through the LEFT-HAND side of the  
upper and/or lower wiring channels.  
3. Refer to Figures 3, 4 & 5. Connect the three-conductor wire  
(IWA-3) from each speaker to a set of terminal screws.  
Connect speaker wiring as follows:  
CENTER  
BLUE  
COPPER  
CN704  
RED STRIPE wire to terminal screw marked RED SILVER.  
GREY wire to terminal screw marked CENTER. BLUE wire  
to terminal screw marked BLUE COPPER.  
6
7
8
9
DOOR  
SPKR  
RED  
SILVER  
4. Refer to Figure 5. The system will accommodate up to 13  
speakers. If more than 9 speakers are connected, use only  
terminals 1, 2, 6 and 7 for double wiring connections.  
When connecting two remotes to screw terminals 1, 2, 6 and 7.  
• Connect both red wires to the RED SILVER terminal screw.  
• Connect one remote’s GREY wire to a CENTER terminal  
screw, and connect the second remote’s center wire to the  
second CENTER terminal screw.  
CN703  
EARTH  
CENTER  
BLUE  
COPPER  
• Connect one remote’s BLUE wire to a BLUE COPPER  
terminal screw, and connect the second remote’s BLUE  
wire to the second BLUE COPPER terminal screw.  
Repeat this procedure for each double remote  
connections. NOTE: Failure to make these double  
connections properly will cause the unit to squeal.  
5. Refer to installation instructions packaged with remote  
speakers or remote controls for wiring of the units.  
6. See “Wire Matching Chart” if you are retrofitting a  
system with the previously used Copper/ Center/  
Silver wire.  
FIGURE 4  
DOUBLE REMOTE CONNECTION  
SINGLE REMOTE CONNECTION  
RED  
1
STRIPE  
RED  
STRIPE  
RED  
SILVER  
RED  
SILVER  
Connecting the Door  
Speaker Wiring  
CENTER  
CENTER  
GREY  
BLUE  
GREY  
1. The door speaker connects to the Master  
terminal board with two conductor (IW-2)  
22 gauge twisted pair wire.  
BLUE COPPER  
BLUE COPPER  
BLUE  
2. Refer to Figure 4. Connect the two wires  
from the door speaker(s) to the two terminal  
screws marked DOOR SPKR on the Master  
Terminal board.  
FIGURE 5  
3
 
(Continued)  
INSTALLATION  
Mounting the Master Panel  
1. Refer to Figure 6. Use two (2) no. 6 x 38" screws to attach  
mounting brackets to rough-in frame Using bottom set  
holes, make sure brackets are flush to wall or rough-in  
and screws are tight.  
3. Refer to Figure 9. Attach master panel to rough-in frame by  
placing keyhole slots in both mounting hinges over screw  
heads in rough-in frame.  
4. Refer to Figure 10. Slide master panel to the right, then  
forward until panel is flush with the wall.  
5. Align master panel with rough-in frame.  
6. Refer to Figure 6. Attach support strap to rough-in by  
attaching onto oblong hole in top of rough-in frame.  
2. Refer to Figures 7 and 8. For rough-in frames which are  
recessed into the wall opening, insert two (2) shoulder  
screws (provided) into the front two holes in the rough-in  
frame. For rough-in frames which are mounted flush with  
the wall, insert two (2) shoulder screws (provided) into the  
back two holes in the rough-in frame.  
ROUTE SPEAKER  
WIRES THROUGH  
LEFT-HAND SIDE  
OF CHANNEL  
AM/FM  
ANTENNA  
HEAT SINK  
SUPPORT STRAP  
FIGURE 6  
FIGURE 7  
FIGURE 8  
FIGURE 9  
FIGURE 10  
4
 
(Continued)  
INSTALLATION  
Connecting Antenna  
1. Connect the AM/FM antenna (supplied with the IR-104  
rough-in) to the 2-pin connector located in the upper right  
corner of the main PC board.  
In most locations, the antenna supplied with the rough-in  
provides adequate AM reception. However, in rural or weak signal  
areas a separate AM antenna may be required. Use the following  
instructions for selecting and connecting a separate AM antenna.  
1. Refer to Figure 11. Move the the auxiliary AM antenna  
selector switch to the AM position.  
2. Connect 50 feet of 22 GA. insulated wire (not supplied by  
NuTone) to the screw terminal marked AUX AM ANTENNA.  
3. Run the wire from the Master location to the attic. Fasten the  
insulated wire at one end of the attic, stretch the wire to its full  
length, and fasten at the opposite end. Fasten the insulated  
wire at several locations between ends to prevent sagging.  
ANTENNA  
GROUND  
AUXILIARY AM  
ANTENNA  
TERMINAL  
AM/FM NOTCH  
DIPOLE ANTENNA  
CONNECTOR  
AUXILIARY AM  
ANTENNA TERMINAL  
SELECTOR SWITCH  
Selecting Remote Radio  
Control Features  
FIGURE 11  
CONTROLLING THE RADIO FROM  
REMOTE STATIONS  
The radio may be turned on/off or a stored radio memory  
channel may be selected at any remote station as follows:  
TUNING  
POWER  
RADIO ON/OFF  
Press and hold the END CALL key for 2 seconds. The radio will  
turn on or off depending on the present state of the radio.  
RADIO MEMORY CHANNEL SELECTION  
Momentarily press the END CALL key. The radio will  
sequentially step through the stored radio memory channels.  
If desired, these functions may be disabled as follows:  
OFF  
ON  
DISABLING REMOTE STATION RADIO ON/OFF  
Refer to Figure 12. Slide the switch labeled POWER located  
on the master station’s main PC board to the OFF position.  
This will disable the remote station radio on/off function at  
ALL remote stations.  
FIGURE 12  
DISABLING REMOTE STATION RADIO  
MEMORY CHANNEL SELECTION  
Refer to Figure 12. Slide the switch labeled TUNING located  
on the master station’s main PC board to the OFF position.  
This will disable the remote station radio memory channel  
selection function at ALL remote stations.  
Installing and Connecting  
Optional Door Release  
Push Button  
Refer to Figure 13.  
1. Open right-hand panel door.  
2. Cut 4 retainer webs from pushbutton hole cover.  
3. Remove cover.  
4. Feed one wire from Door Release Transformer and one  
wire of Door Release mechanism through push button hole.  
NOTE: The door release requires a separate 301T Transformer.  
5. Connect the 2 wires to the pushbutton.  
6. Rotate the pushbutton so the screws are on the top and bottom  
as illustrated, then snap the button into the mounting hole.  
FIGURE 13  
5
 
(Continued)  
INSTALLATION  
9 PIN  
Connecting the Master Panel  
to the Terminal Board  
Refer to Figure 14. Connect the 11, 9, 4 & 2 pin plugs  
from the Master to the appropriate connectors on the terminal  
boards.  
11 PIN  
2 PIN  
4 PIN  
Connecting Optional  
Accessories  
1. Refer to Figure 15. To connect an external audio source  
(CD, Cassette, etc.) to the IMA-3303 Radio Intercom, locate  
the CD/TAPE and AUXiliary input on the lower right side of  
the master station’s main PC board.  
2. Insert the audio source output plug into the appropriate input  
jack on the master station.  
NOTE: The CD/TAPE input has an input level control  
to allow matching of the external audio source to the  
built-in AM/FM tuner.  
FIGURE 14  
3. To use the selected source audio for recording onto a  
cassette recorder, insert the tape recorder’s input plug  
into the master station’s LINE OUT jack.  
4. OPTIONAL HOOK-UP TO PROVIDE RADIO ONLY:  
The radio and optional entertainment sources can be  
channeled through an auxiliary amplifier (purchase NuTone  
Model: IMA-516 separately) to provide uninterrupted music  
(no intercom) to separate speakers. This type of installation  
can be used for a doctor’s office, where intercom and music  
are desired in the office area, but music only in the waiting  
room.  
AUXILIARY  
INPUT  
CD/TAPE INPUT  
NOTE: If an auxiliary amplifier is used, connect the  
master station’s line out jack to the auxiliary amplifier’s  
low-level radio input wires.  
CD/TAPE INPUT  
LEVEL ADJUSTMENT  
LINE OUTPUT  
Connecting the Optional  
Electronic Chime  
Refer to Figure 16.  
FIGURE 15  
1. Connect NuTone IW-2 cable from the chime to the (+) and (-)  
screw terminals.  
2. Refer to the Installation Instructions packaged with the chime  
for complete wiring information.  
IMPORTANT: FAILURE TO USE NUTONE IW-2 CABLE WILL  
CAUSE THE SYSTEM TO HUM AT ALL TIMES.  
FIGURE 16  
ELECTRONIC CHIME INPUT  
6
 
(Continued)  
INSTALLATION  
Connecting the Optional  
Electronic Chime Module  
MODELS IA-28 OR IA-29  
1. Connect wires from door pushbuttons - front, rear and side -  
to chime module.  
2. Refer to the instructions packaged with the chime module  
for complete wiring information.  
3. Refer to Figure 17. Locate the chime module mounting  
bracket.  
4. Align the chime module with the mounting bracket. Apply firm,  
even pressure to each side of the chime module. The chime  
module will snap into place. Fasten module to panel with one  
screw (supplied with chime module).  
5. Plug 4 pin plug from chime module into connector on Master  
board.  
MODEL IA-29 ONLY  
FIGURE 17  
5. Locate the chime selector switch mounting bracket.  
6. Remove the chime selector switch retaining screws.  
7. Position the chime selector switch onto the posts and reinstall  
the retaining screws.  
8. Route the selector switch wires as illustrated to prevent the  
wires from interferring with the front panel mounting bracket.  
Connecting the Transformers  
NOTE: Be sure all intercom wiring has been properly  
terminated to the terminal board and remote stations before  
applying power to the system.  
1. Refer to Figure 18. The transformers’ primary leads should  
already be connected to the 120vAC house supply wiring.  
Be sure power is off to transformer before connecting  
Master.  
TRANSFORMERS  
2. Two sets of low voltage supply leads are located in the  
bottom left corner of the master station. Connect one pair of  
supply leads to each transformer located in the bottom of the  
rough-in.  
FIGURE 18  
7
 
(Continued)  
INSTALLATION  
Securing the Master Panel  
1. Refer to Figure 20. Inspect all wiring connections to make  
sure they are complete and correct.  
2. Make sure all antenna connections are secure.  
3. Position all Remote Speaker wires toward the LEFT-HAND  
side of the wiring channel to prevent interference with the  
unit’s heat sink.  
4. Position Master panel over rough-in frame, and align screw  
holes in Master panel with mounting brackets.  
5. Secure Master panel to rough-in mounting brackets with  
two screws (supplied).  
NOTE: The screws will pierce the wall surface behind the  
mounting brackets. If wall surface is hard, a clearence hole  
must be drilled behind mounting brackets before securing  
Master panel.  
FIGURE 19  
8
 
SYSTEM OPERATING CONTROLS  
Master Station Controls  
1
2
3
4
END CALL: Ends intercom communication and returns system  
13 MEMORY SET: Stores desired radio frequency into a selected  
to audio source.  
memory location.  
DOOR TALK: Initiates intercom communication to the door  
speakers.  
14 TIME SET/HOUR/MIN: Used when setting the timer and  
clock.  
INSIDE/PATIO: Initiates intercom communication to remote  
stations.  
15 TREBLE: Adjusts the high frequency audio content of the  
source audio.  
TIMER: Enables or disables the radio timer. The indicator  
light will illuminate next to the timer button when the Radio  
timer is enabled.  
16 BASS: Adjusts the low frequency audio content of the source  
audio.  
17 SYSTEM VOLUME: Adjusts the program audio level  
5
6
PROGRAM AUDIO SOURCE: Selects the program audio  
source: AM, FM, CD/TAPE and AUX. The indicator light will  
illuminate next to the selected program audio source.  
throughout the system.  
18 LOUDNESS: Compensates for the loss of bass and treble  
response the human ear has when listening to audio at low  
volume levels.  
PROGRAM OFF: Turns off the selected program audio source.  
NOTE: The Program Off key does not affect the intercom  
operation.  
19 INTERCOM VOLUME: Adjusts intercom audio level  
throughout the system.  
7
8
9
MASTER VOLUME: Adjusts the volume at the master  
station.  
20 MASTER STATION STATUS SWITCH: Sets the master station  
in one of the following modes: RADIO INTERCOM,  
INTERCOM ONLY, OFF or MONITOR.  
MEMORY 1-6 KEYS: Provides direct access to stored radio  
frequencies.  
21 REMOTE STATION STATUS SWITCHES: Sets the remote  
stations in one of the following modes: RADIO INTERCOM,  
INTERCOM ONLY, OFF or MONITOR.  
▲ ▼ UP/DOWN TUNING: Provides manual tuning of the  
AM/FM radio.  
10 SCAN: Activates scan tuning during AM/FM operation.  
22 ELECTRONIC CHIME TUNE SELECTION: Selects the tune  
of the optional IA-29 Electronic chime.  
11 DOOR RELEASE KNOCKOUT: Mounting hole for optional  
door release push button.  
12 MICROPROCESSOR RESET: Initiates a reset of the micro-  
processor. NOTE: A reset of the microprocessor will erase the  
system’s memory.  
6
2
1
4
5
7
8
9 10  
3
PM  
12 11  
21  
20  
18  
17  
16 15  
14  
22  
19  
13  
FIGURE 20  
9
 
SYSTEM OPERATING CONTROLS  
6. Release the DOOR TALK key. Audio from the door speakers  
will be heard at all stations in the system.  
Digital Clock  
7. Press and hold the END CALL key. Door communication will  
end, and radio audio will return to all stations in the system.  
SETTING THE TIME  
1. Press the TIME SET key one time. The display will begin  
flashing, and the words SET TIME will be displayed.  
2. Within 5 seconds, press the HOUR key to advance the hours.  
Use the HOUR key  
8. Press and hold the END CALL key for 2 seconds. The radio  
will turn off.  
9. Press and hold the END CALL key for 2 seconds.  
The radio will turn on. See page 5 for information on  
controlling the radio from a remote station.  
to select AM/PM by  
advancing past  
12:00 on the  
display.  
10. Repeat procedure at next station.  
PM  
3. Within 5 seconds,  
press the MIN key to advance the minutes.  
4. After entering the correct time, release the key. The display will  
stop flashing after 5 seconds, and the time will be set.  
Setting System Volume  
The volume levels required at each Station may vary with the  
locations of the speaker and the size of the room where the  
speaker is located. Spend some time experimenting with  
volume levels, and adjust each speaker so that you can clearly  
hear the radio and intercom. Use the following procedures to set  
your system’s volume levels:  
Operational Checkout  
If the Radio-Intercom does not operate according to the  
following instructions, refer to the Installer's Troubleshooting  
Guide.  
1. At each remote station, turn the volume control completely  
clockwise to maximum volume.  
1. Set STATION STATUS SWITCHES to the RADIO/  
INTERCOM position.  
2. Set the MASTER VOLUME control to maximum.  
2. At the master station, set the REMOTE and MASTER  
SPEAKER STATUS switches to the RADIO INTERCOM  
position.  
3. Set each individual station VOLUME control to maximum.  
3. Turn the MASTER VOLUME control to maximum volume.  
4. Turn the SYSTEM VOLUME control on the master station to  
approximately one-third volume.  
4. Set the SYSTEM VOLUME control to 1⁄  
2
position.  
position.  
6. Set the BASS and TREBLE controls to the 1⁄  
5. Set the INTERCOM VOLUME to 3⁄  
4
2
position.  
5. Select an AM or FM radio station with a strong, clear signal.  
7. Tune in a strong FM radio station as follows:  
A. Press the FM key  
B. Use the ▲ ▼ keys to locate a strong FM radio station.  
Beginning with the master station, check each station in the  
system for proper operation using the following procedure:  
6. Adjust the master station's SYSTEM VOLUME control until  
you have enough volume at the remote station that requires  
the highest volume (i.e. a large living room, family room,  
basement, etc.).  
NOTE: The Master Station and all Remote Stations  
(except the door speakers) are equipped with their own  
volume controls. Although the Master Station SYSTEM  
VOLUME sets the System's Volume level, you may adjust  
an individual speaker's volume level as desired.  
1. Adjust the station's Volume Control (Master Volume  
on the master station) between maximum and minimum,  
making sure the audio is completely muted in the minimum  
position and no noise is created by the volume control  
during adjustment.  
7. Adjust the MASTER VOLUME control and all remote  
stations' VOLUME controls to the volume level you  
desire. Do not set the remote stations' volume controls  
2. Press the INSIDE/PATIO key. Radio audio will mute and  
audio from the station will be heard at all stations in the  
system, except the door speaker(s).  
below 1⁄  
volume.  
2
3. Release the INSIDE/PATIO key to hear the reply.  
NOTE: To reply to an intercom call initiated at a remote  
station, the Inside/Patio key must be pressed at the station  
responding to the intercom call. If, however, an intercom  
call is initiated at the master station, the Inside/Patio key  
does not need to be pressed at the station responding to  
the intercom call. Audio from the responding stations and  
all stations in the system will be heard at the master station  
when the INSIDE/PATIO key is released.  
Setting Intercom Volume  
1. Initiate Intercom call from the master station by pressing the  
INSIDE PATIO key.  
2. Speak with a normal voice about 2-3 feet from the station  
speaker.  
3. Adjust the INTERCOM VOLUME control until the initiating  
station’s audio is clearly heard at all stations in the system.  
NOTE: The volume control at all stations should be set  
between 12 to maximum volume for proper intercom  
operation.  
4. Press the END CALL key. Intercom communication will end,  
and radio audio will return to all stations in the system.  
5. Press the DOOR TALK key. Radio audio will mute, and audio  
from the station will be heard at the door speaker(s) and all  
stations in the system.  
4. Repeat the above procedure at several locations until an  
acceptable intercom audio level is achieved at all stations.  
10  
 
OPERATIONAL CHECKOUT  
Diagnostic Tests  
The following diagnostic test have been incorporated into  
the NuTone IMA-3303 Radio Intercom to assist in system  
troubleshooting.  
2. CONTROL LINE VOLTAGE TEST – Displays the voltage  
on the control line.  
To activate: Press and HOLD  
1. key  
1. Master station keyboard test  
2. Control line voltage test  
3. Display test  
2. key  
3. MEMORY 2 key.  
The following applies to all three diagnostic tests:  
Example:  
1. To access any of the diagnostic tests, the system must  
be in the quiescent state (radio off and intercom in the  
standby mode).  
VOLTAGE ON  
CONTROL LINE  
DISPLAY  
2. Pressing the MEMORY SET key will end the current  
diagnostic test.  
2:34  
2:17  
2:06  
3.4 volts  
1.7 volts  
.6 volts  
3. The current diagnostic test will end after one minute of  
inactivity.  
NOTE: An incorrect control line voltage caused by miswiring  
or a defective remote station may prevent the unit from entering  
the diagnostic mode. This condition, however, can  
be circumvented by first placing all station selector switches  
into the OFF mode and then disconnecting CN701 from the  
terminal board. The voltage on the control line can then be  
measured by activating the control line voltage test mode and  
then reconnecting CN701.  
In this mode, the hours represent the diagnostic test,  
and the minutes indicate the voltage on the control line.  
VOLTAGE WINDOW  
MODE  
MAX  
MIN  
End Call  
Door Talk  
Inside/Patio  
4.5V - 2.4V  
2.4V - 1V  
1.0V - 0  
1. MASTER STATION’S KEYBOARD TEST Verifies that  
all keys on the master station are functioning properly.  
To Activate: Press and HOLD  
1. key  
2. key  
3. MEMORY 1 key.  
In this mode the hours in the display represent the current  
diagnostic test and the minutes indicate the current key  
being pressed. The following will be displayed as each key  
is pressed.  
The control line voltage windows for the three intercom modes  
are listed above. For proper intercom operation, the control  
voltage produced when an intercom key is pressed at a remote  
station should fall between the voltages indicated.  
NOTE: Pressing END CALL, DOOR TALK or INSIDE/PATIO  
keys at the master station will not change the voltage on the  
control line.  
KEY  
DISPLAY  
If a remote station does not produce a voltage within the above  
windows for a specific intercom function, check the following:  
• Make sure all connectors from the master station are properly  
installed into the terminal PC board.  
• Check IWA-3 connections at the terminal PC board and at  
each remote station.  
No key pressed  
SCAN  
1:00  
1:01  
1:02  
1:03  
1:04  
1:05  
1:06  
1:07  
1:08  
1:09  
1:10  
1:11  
1:12  
1:13  
1:14  
1:15  
1:16  
1:17  
1:18  
1:19  
1:20  
1:21  
1:22  
PROGRAM OFF  
AM  
FM  
CD/TAPE  
AUX  
TIMER  
INSIDE/PATIO  
DOOR TALK  
END CALL  
MEMORY 1  
MEMORY 2  
MEMORY3  
MEMORY 4  
MEMORY 5  
MEMORY 6  
TIME SET  
HOUR  
• Confirm that the suspect remote speaker station functions  
properly by replacing it with a known good Remote Station.  
3. DISPLAY TEST – Displays all of the segments in the display.  
To Activate: Press and HOLD  
1. key  
2. key  
3. MEMORY 3 key  
Pressing the key toggles the display on and off.  
MIN  
MEMORY SET  
11  
 
INSTALLER'S TROUBLESHOOTING GUIDE  
TROUBLE  
POSSIBLE CAUSE  
No electrical power.  
POSSIBLE REMEDY  
No radio, no intercom.  
(No Display).  
Be certain 120VAC, 60Hz power has been provided to the primaries of  
both 301T Transformers. No less than 16VAC should be measured on  
the secondary of either Transformer.  
Defective transformer.  
Faulty Master Station.  
Replace transformer.  
No radio, intercom working.  
(AM/FM indicator on.).  
Isolate Master Station from installation by removing ribbon cables from  
terminal board and wait one minute for timeout. With power on, radio  
should be playing at Master. If no radio, Master is probably faulty. If  
radio plays, reconnect ribbon cables.  
Installation problem.  
Antenna problem.  
Check terminal board for shorted terminals or miswired cables.  
Remove one 3-wire cable at a time to locate faulty line. When radio  
comes on, check speaker connections and run continuity check of  
speaker wiring.  
Check for shorted antenna connection. Remove antenna connector  
from tuner board and touch each pin with metallic object. If radio plays,  
antenna is not functioning; be sure it is installed properly. In weak  
signal areas, an outside antenna may be necessary. Also see  
Connecting Auxiliary AM Antenna  
Low or distorted radio  
volume.  
Incorrect volume setting.  
Improper operation.  
Follow “Setting Volume” instructions under OPERATIONAL  
CHECKOUT.  
Low or no intercom volume  
from remote speaker in  
MONITOR mode.  
Be sure remote speaker set for MONITOR has its volume control set  
between 1⁄  
2
and max, and receiving speakers have volume controls set  
and max. Follow “SETTING VOLUME” instructions in  
between 1⁄  
2
Operation Checkout.  
Program and Intercom Volume  
Control adjustment.  
Follow these instructions whenever the radio tends to overpower  
transmissions from a remote speaker in the MONITOR mode. These  
instructions will help you get the proper balance between the radio and  
the monitored speaker.  
1. Set system volume control to midpoint.  
2. Set master to CD/TAPE or AUX position.  
3. Adjust volume control for each remote station and speaker in  
master station 3⁄  
position.  
4
4. Set master to AM or FM and tune to a strong AM or FM station.  
5. Adjust program volume control for a desired listening level.  
6. Increase Intercom volume control setting. Adjust clockwise to  
desired monitor volume.  
System squeals when using Shorted wire on master or  
intercom. remote terminal board.  
Check for short between terminals or loose wire.  
Two or more Remote Stations on Make separate cable (IWA-3) runs from each Remote Station to the  
same wire run to Master.  
Master.  
Speakers in adjacent rooms  
mounted on common wall, or  
mounted back to back.  
If speakers are mounted directly back to back, one speaker will have to  
be relocated. If speakers are in a common wall, try placing fiberglass  
insulation behind each speaker, or isolate the speakers from the wall  
by placing rubber washers or weather stripping between speaker and  
wall.  
Improper wire used in  
installation.  
NuTone Model IWA-3-conductor, flat-ribbon cable must be used.  
Improper double connections  
Follow “Connecting the Remote Speaker Wiring” under  
of Remote Stations on terminal INSTALLATION.  
screws 1, 2, 6 & 7.  
12  
 
INSTALLER'S TROUBLESHOOTING GUIDE  
TROUBLE  
Hum in speakers.  
POSSIBLE CAUSE  
POSSIBLE REMEDY  
Intercom wiring run too close to Keep intercom wiring as far as practical from household AC power  
household AC power wiring.  
wiring. Do not run intercom wiring parallel to AC power wiring.  
Shorted intercom power wiring  
or power wiring shorted to  
ground.  
Check power connections to Master and connections to transformers.  
Interference from household  
electrical fixtures.  
A dimmer may cause interference. For dimmer and fluorescent lighting  
interference, use filters (G.E. 89G635 or equivalent; NuTone Part No.:  
1559A-000).  
Static.  
Loose ground connection.  
Check ground connection to Master and connection to earth ground  
source.  
Interference from household  
electrical fixtures.  
A dimmer may cause interference. For dimmer and fluorescent lighting  
interference, use filters (G.E. 89G635 or equivalent; NuTone Part No.:  
1559A-000).  
Interference from household  
electrical appliances.  
Correct interference at the source: fish tank, heater, hand tool, coffee  
pot, etc.  
Remote Station not working. Wire installation.  
Check terminal board for broken wire or loose connection. Check  
continuity of wire.  
Speaker.  
Check continuity of speaker. Clean switch controls. Substitute with  
speaker known to be in working order.  
No door communication.  
Wire installation.  
Check continuity of wiring. Check connections at speaker and Master.  
Speaker.  
Check with a speaker known to be in working order.  
Opitional Electronic Chime  
(Models IA-28 or IA-29) does  
not operate or operates at a  
low level.  
Wire installation.  
Be certain the chime is properly connected to the master station. Also,  
be certain the front, side and rear buttons are properly connected to  
the chime board.  
Improper volume setting.  
Wire installation.  
Adjust the volume of the chime module by turning the volume  
potentiometer located on the chime module. NOTE: Chime Audio will  
NOT be heard at stations selected to the OFF or MONITOR.  
Be certain the electronic chime is properly connected to the master  
station's electronic chime input screw terminals.  
Electronic chime can't be  
heard through the master  
station or remote speakers.  
Adjust the volume of the electronic chime by turning volume  
potentiometer located on the chime.  
Improper volume setting.  
Antenna should be located in attic and connected to tuner in Master.  
Check antenna connector to be sure it is connected to header on tuner  
board.  
Cannot receive radio station Faulty antenna connection.  
which is received by another  
radio in home.  
13  
 
14  
 
15  
 
Two Year Limited Warranty  
WARRANTY OWNER: NuTone warrants to the original consumer purchaser of its products that such products will be free from defects in materials or workmanship for a period  
of two (2) years from the date of original purchase. THERE ARE NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, IMPLIED  
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  
During this two year period, NuTone will, at its option, repair or replace, without charge, any product or part which is found to be defective under normal use and service.  
THIS WARRANTY DOES NOT EXTEND TO FLUORESCENT LAMP STARTERS OR TUBES, FILTERS, DUCT, ROOF CAPS, WALL CAPS AND OTHER ACCESSORIES  
FOR DUCTING. This warranty does not cover (a) normal maintenance and service or (b) any products or parts which have been subject to misuse, negligence, accident,  
improper maintenance or repair (other than by NuTone), faulty installation or installation contrary to recommended installation instructions.  
The duration of any implied warranty is limited to the one year period as specified for the express warranty. Some states do not allow limitation on how long an implied warranty  
lasts, so the above limitation may not apply to you.  
NUTONE’S OBLIGATION TO REPAIR OR REPLACE, AT NUTONE’S OPTION, SHALL BE THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY UNDER THIS  
WARRANTY. NUTONE SHALL NOT BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL OR SPECIAL DAMAGES ARISING OUT OF OR IN CONNECTION WITH  
PRODUCT USE OR PERFORMANCE. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may  
not apply to you. This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state. This warranty supersedes all prior warranties.  
WARRANTY SERVICE: To qualify for warranty service, you must (a) notify NuTone at the address stated below or telephone 1/800-543-8687, (b) give the model  
number and part identification and (c) describe the nature of any defect in the product or part. At the time of requesting warranty service, you must present  
evidence of the original purchase date.  
Date of Installation  
Builder or Installer  
Model No. and Product Description  
IF YOU NEED ASSISTANCE OR SERVICE:  
For the location of your nearest NuTone Independent Authorized Service Center:  
Residents of the contiguous United States Dial Free 1-800-543-8687  
Please be prepared to provide:  
Product model number • Date and Proof of purchase • The nature of the difficulty  
Residents of Alaska or Hawaii should write to: NuTone Inc. Attn: Department of National Field Service, 4820 Red Bank Road, Cincinnati Ohio 45227-1599.  
Residents of Canada should write to: Broan-NuTone Canada, 1140 Tristar Drive, Mississauga, Ontario, Canada L5T 1H9.  
Rev. 03/2001  
Product specifications subject to change without notice.  
4820 Bank Road, Cincinnati, Ohio 45227  
Printed in China, 10/03, Part No. 83068  
 

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