Nutone Ima4406 Users Manual 62377 IMA 4406 I.I.

IMA4406 to the manual 3211274b-75e7-4765-adb0-34416efa29c0

2015-02-03

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INSTALLATION
INSTRUCTIONS

AM/FM
RADIO/CD PLAYER
INTERCOM SYSTEM

This booklet contains information for installing the master
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 frames for detailed wiring information. For more
detailed information on wiring and mounting other system
components (i.e., speaker, remote control, etc.), refer to the
installation instructions packaged with each separate
component.

MODEL: IMA-4406 SERIES MASTER STATION

NUTONE CHIME
TRANSFORMER

Use this diagram for reference only.
See IR-105 Rough-in frame instructions
for detailed wiring.

14/2 WITH GROUND
(OBSERVE LOCAL CODES)
120V 60HZ (CLASS 1)

120V 60HZ
(CLASS 1)
(OBSERVE
LOCAL CODE)

NUTONE
IW-6

18/2 (NUTONE S-143)

(2) 801T
TRANSFORMERS
SECONDARY:
18V, 72VA

PUSHBUTTON FOR
OPTIONAL CHIME
MODULE

EARTH
GROUND

ATTIC

OPTIONAL
ELECTRONIC
DOOR CHIME

14 GA

300´ MAX
NUTONE IW-2

200´ MAX
NUTONE
IW-2

OUTSIDE
REMOTE
CONTROL

INSIDE
REMOTE
CONTROL

INSIDE
ANTENNA
NUTONE IW-6

PUSHBUTTON

IMA-4406 SERIES REPRESENTATIVE WIRING ILLUSTRATION

IW-2

OUTSIDE
SPEAKER

IW-2

INSIDE
SPEAKER

INSIDE
SPEAKERS
W/CONTROLS

IW-6

TRANSFORMER

IMA-4406
MASTER STATION

14 GA
GROUND

301T

120V 60HZ
(CLASS 1)
(OBSERVE
LOCAL CODE)

100´ MAX S-143
100´ MAX S-143

OPTIONAL
MUSIC
SOURCE

IW-2

DOOR
SPEAKER

NUTONE
IW-6

MUSIC
DISTRIBUTION
VOLUME
CONTROL

SHIELDED
AUDIO
CABLES

NUTONE
IW-2

IW-2

5˝ PATIO
SPEAKER
W/CONTROLS

MUSIC
DISTRIBUTION
SPEAKER
120V. 60HZ (CLASS 1)
(OBSERVE LOCAL CODE)

300´ MAX

OPTIONAL WIRING
FOR DOOR
RELEASE

IA-6C
RECEPTACLE

DR-1/DR-2
DOOR RELEASE

DESKTOP
FRAME WITH 5˝
REMOTE
IA-6
PLUG

DOOR SPEAKER MODELS WITH CHIME
PUSHBUTTON ALSO REQUIRE 18/2 (S-143)
TO CHIME LOCATION OR IW-2 TO MASTER
IF CHIME MODULE IS USED.

INSTALLATION
TABLE OF CONTENTS
INSTALLATION

PAGE

Contents of Carton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Precautions and Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Wiring Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Remote Station Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Maximum Number of Remote Stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Mounting the Terminal Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Connecting the Remote Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Connecting Volume Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Connecting Door Speaker Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Preparing Master Station Panel for Optional Door Release Pushbutton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Mounting the Optional Chime Module in the Master Station Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5, 6
Mounting the Master Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Connecting the Power Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Mounting the Transformer Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Connecting the Master Station to the Terminal Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Connecting the Radio Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Connecting the Optional Chime Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Connecting Optional Electronic Chime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Connecting Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Connecting Power to the Optional CP-95 Cassette Player . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Mounting and Connecting Optional Door Release Pushbutton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Connecting the Memory Back Up Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Securing the Master Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Powering Up the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

OPERATIONAL CHECKOUT
System Operating Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Digital Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Setting Program Audio Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13, 14
Setting Intercom Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Setting Internal Intercom Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Setting the BEEP Tone Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Setting the External Audio Source Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Resetting the Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

INSTALLER’S TROUBLESHOOTNG GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16, 17, 18
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

INSTALLATION
CONTENTS OF CARTON

Use NuTone IW-2, 22 ga. twisted pair for connecting:
• Door speakers to master
• Remote controls to speakers
• Speaker volume control (IC901) to master
• Speaker volume control (IC901) to speakers
• Electronic chime audio output to master
• Pushbutton to chime module

Check (3) for the following IMA-4406 carton contents.
o IMA-4406 master station
o Terminal board
o Transformer cover
o Hardware bag assembly containing:
2 - shoulder screws
12 - No. 6 x 3/8 screws
4 - colored panel mounting screws
4 - ‘L’ panel mounting brackets
o Homeowner’s manual with room labels
o Installation instructions
o Product Registration Warranty Card

Use NuTone S-143, 18 ga. twisted pair for connecting:
• Pushbutton to electronic chime
• Electronic chime to chime transformer
Use Nº14/2 power cable with ground, Class 1 UL Listed
(Observe local codes) for connecting:

NOTE TO INSTALLER: Do not discard these
installation instructions. Please transfer all
installation instructions, warranty registration
and homeowner’s manual to the homeowner.

• Transformers to 120v AC
Use shielded audio cable for connecting external audio
sources to the master station.

PRECAUTIONS AND GUIDELINES

REMOTE STATION WIRING

The NuTone IMA-4406 master station has been designed for
ease of installation. Please read and follow ALL installation
instructions, guidelines and precautions. Any deviation from
these instructions or miswiring combinations may result in
unit failure and void of warranty.

An individual 6-wire cable (IW-6) must be connected from
each remote station or remote control location to the master
station’s terminal board.
Maximum station wire length: 750 ft.

WARNING!
120 Volt AC Power to Transformers in the IR-105
Rough-in MUST Remain OFF until ALL System Wiring
at the Master and Remote Stations is Complete.

IMPORTANT! NuTone cannot be responsible for
improper system operation that results from
interference generated by light dimmers, fluorescent
lighting fixtures, and similar electrical products. Such
interference must be corrected at the source. TO HELP
REDUCE THIS INTERFERENCE, ALL WIRING
CONNECTIONS TO THE MASTER MUST BE PLACED
AT LEAST 12 INCHES FROM ANY AC POWER WIRING.
AVOID RUNNING INTERCOM WIRES PARALLEL TO
AC POWER WIRING.

• Observe all local building regulatory codes in your area.
• All screw terminals at the master and remote stations must
be secure.
• Observe all color code connections of wires when
connecting the remote stations to the master.
• The IMA-4406 is designed to be installed with only NuTone
specified wire. No other wire should be used. The use of
wire other than NuTone wire will void all NuTone warranties
and may result in faulty installation and improper operation.

Maximum total length of IW-6 cable per system: 4,000 ft.

MAXIMUM NUMBER OF REMOTE
STATIONS

IMPORTANT WARNING!
THE POWER TRANSFORMER CONTAINS AN
INTERNAL FUSE.
DO NOT SHORT THE LOW VOLTAGE CONNECTING
SCREWS OF THE TRANSFORMER OR THE
TRANSFORMER WILL BE DESTROYED!

The master station will accommodate up to 9 connections
at the terminal board. These connections can be any
combination of remote stations, remote controls or volume
NOTE: NEVER connect more than one remote
station to a set of screw terminals.
controls. It will also accommodate 3 door speaker
connections.
If more than 9 stations are required, use the optional
Model Nº IAA-440 expansion kit. This will allow an additional
6 connections at the master.

WIRING SPECIFICATIONS
See the IR-105 master rough-in frame installation instructions
for detailed wiring information.
Use NuTone IW-6, 3 twisted pair for connecting:
• Remote controls to master
• Remote stations to master

INSTALLATION (Continued)
2. Refer to Figure 2. Connect the IW-6 cable from each
remote to the appropriate set of terminal screws at the
master station’s terminal board. When connecting the
cable to the terminal board, be sure to observe the
matching of all color codes.

WARNING! NEVER EXCEED A TOTAL OF 15 NUTONE
25 OHM SPEAKERS ON THIS SYSTEM.
WARNING! NEVER USE STANDARD 8 OHM STEREO
SPEAKERS ON THIS SYSTEM. USE ONLY NUTONE
SPECIFIED SPEAKERS ON THIS MASTER.

Connect:

RED to RED
RED/WHT to RED/WHT
BLK to BLK
BLK/WHT to BLK/WHT
ORN to ORN
ORN/WHT to ORN/WHT
Only connect one remote to each set of screw terminals.
After completing all connections, check for any shorted
wires. Dress cables flat against the terminal board to allow
space for the master station to be properly secured.

MOUNTING THE TERMINAL BOARD
1. Remove and clean any drywall debris or dust from the
rough-in before beginning installation.
2. Refer to Figure 1. Locate the terminal board in the left
rear section of the rough-in frame.
3. Use four (4) Nº 6 x 3⁄8“ screws supplied to secure the
terminal board to the rough-in frame.
4. Make certain the lower right-hand screw is secure and
snug against the ground lug which covers the mounting
hole in the terminal board. Do not bend ground lug.
Make sure it is positioned between the screw and
terminal board.

IW-6
MOUNTING HOLES

RED
RED/WHT

IMPORTANT
DO NOT APPLY POWER TO THE SYSTEM UNTIL ALL
CONNECTIONS ARE COMPLETE AT THE MASTER
AND REMOTE STATIONS.

BLK
BLK/WHT
ORN
ORN/WHT

FIGURE 2
3. Refer to installation instructions packaged with the remote
stations and remote controls for wiring these units.
4. Refer to Figure 3. Use the Wire Matching Chart if you are
retro-fitting a system with the previously used IW-6R cable.
IMPORTANT – WHEN NUTONE MODEL IW-6R
WIRING IS USED:
CONNECT TO THE
SCREW TERMINALS
ON THE TERMINAL
BOARD MARKED:

FIGURE 1

1
2
3
4
5
6

All Remote Stations, Remote Controls, Speaker
Volume Controls, and Door Speaker Wiring MUST
Return Directly to the Master Station. DO NOT
CONNECT WIRING FROM SPEAKER TO SPEAKER!

CONNECTING THE REMOTE WIRING
1. Dress all remote wiring through the rectangular holes
in the upper right and left sides of the rough-in frame.
All wiring connections are made to the master station’s
terminal board.

ORN
BLK
BLK/WHITE
ORN/WHITE
RED
RED/WHITE

BLUE STRIPE
FIGURE 3

CONNECTING VOLUME CONTROL WIRING
4

INSTALLATION (Continued)
PREPARING MASTER STATION PANEL FOR
OPTIONAL DOOR RELEASE PUSHBUTTON

Refer to Figure 4. If a NuTone Volume Control is installed in
the system, connect the control’s IW-2 wiring to the ORN and
ORN/WHT screw terminals at the master station. Only ONE
NuTone speaker may be connected to each volume
control. Each volume control/speaker counts as a
remote station. Remember: The maximum remote
connections to the Master Station is 9. Adding the
optional IAA-440 expansion module will increase the
system remote capability to 15 stations.
Refer to the installation instructions packed with the speaker

To remove the pushbutton cover, position the master station
face up. Be careful not to damage the cables on the back of
the unit.
1. Refer to Figure 6. Open the left-hand door on the master
station panel.

FIGURE 6
ORN

2. Cut the 4 retainer webs from the pushbutton cover.
3. Remove cover. The door release pushbutton will be
installed and connected after the master panel has been
mounted to the rough-in frame.

ORN/WHT

MOUNTING THE OPTIONAL CHIME
MODULE IN THE MASTER STATION PANEL

FIGURE 4

1. Position the master station panel face down on a soft cloth.
2. Refer to Figure 7. Align the optional NuTone IA-28 or
IA-29 chime module onto the mounting bracket located in
the master station.

NEVER USE 8 OHM STEREO SPEAKERS
WITH THIS SYSTEM!
volume control for wiring this unit.

SNAP IN PLACE

CONNECTING DOOR SPEAKER WIRING
The Door Speakers connect to the Master Station Terminal
Board with twisted pair IW-2 wire.
1. Refer to Figure 5. Connect the two wires from the Door
Speaker(s) to the 2 screw terminals marked DOOR
SPEAKER on the master station terminal board.

RED
WIRE
IA-29 ONLY

DOOR
SPEAKER

FIGURE 7

3. Apply firm, but even pressure to each side of the chime
module until it snaps into place.
4. Plug the 4 pin connector on the module into the connector
located on the master. When properly installed, the ribbon
cable will point away from the master station’s circuit
boards, as illustrated.
5. Connection from the pushbuttons to the master will be
made after the master panel has been mounted.

FIGURE 5

INSTALLATION (Continued)
Model IA-29 Only
1. Refer to Figure 8. Locate the chime selector switch
mounting bracket in the master unit.

2. Refer to Figure 10A and 10B. 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 into the back two
holes in the rough-in frame.

BACK HOLE – FOR
FLUSH MOUNTED
ROUGH-INS
FRONT HOLE –
FOR RECESSED
ROUGH-IN

FIGURE 10A

FIGURE 8
2. Remove and set aside the chime selector switch retaining
screw located in the master unit.
3. Remove and discard the square foam pads on the chime
selector switch PC board connected to the chime module.
4. Slide the PC board into the mounting bracket on the
master station.
5. Fasten the chime selector switch PC board with the
retaining screw (earlier removed).

MOUNTING THE MASTER STATION
NOTE: If an optional IAA-440 expansion module is to be
installed into the IMA-4406 master station, it should be
installed before mounting the master station. Refer the
installation instruction provided with the expansion module
before performing the following mounting steps.
1. Refer to Figure 9. Use two (2) #6x3⁄8˝ screws per bracket
to attach each of the four (4) mounting brackets to the
rough-in frame. Before tightening, slide the bracket so it is
flush with the wall surface (flush with rough-in frame if the
rough-in is installed after the wall board). Tighten all eight
(8) screws.

FIGURE 9

FIGURE 10B

3. Refer to Figure 11. Attach master panel to rough-in
frame by placing mounting hinge keyhole slots over
shoulder screw heads in the rough-in frame.
4. Refer to Figure 12. Slide master station panel to the right,
then forward until it is flush with the wall surface.
5. Align master panel with rough-in frame.

FIGURE 11

FIGURE 12

6. Refer to Figure 13. Attach support strap to rough-in
frame by attaching metal hook into hole in top of rough-in
frame. Using pliers, squeeze hook closed. Hook must not
come loose when master is later secured.
FIGURE 13

INSTALLATION (Continued)
MOUNTING THE TRANSFORMER COVER

CONNECTING THE
POWER TRANSFORMERS
s

IMPORTANT: The transformer cover must be installed
for proper operation of the intercom.
1. Refer to Figure 15. Remove the left front and right rear
screws from the transformer enclosure. Set screws aside
for later installation.
2. Position the transformer cover (with insulator positioned
towards transformers) over the transformer enclosure so
holes in cover align with holes in enclosure.
3. Fasten cover with two (2) screws previously removed.

CAUTION
BE SURE THE AC POWER IS OFF BEFORE
CONNECTING THE POWER TRANSFORMERS. DO
NOT TURN AC POWER ON TO TRANSFORMERS
UNTIL ALL WIRING AT THE REMOTE AND MASTER
STATIONS IS COMPLETE!
1. Refer to Figure 14. The transformers’ primary leads
should already be connected to the 120 volt AC house
supply wiring. Be sure power is off before connecting
IMPORTANT WARNING!
THE POWER TRANSFORMER CONTAINS AN
INTERNAL FUSE.
DO NOT SHORT THE LOW VOLTAGE CONNECTING
SCREWS OF THE TRANSFORMER OR THE
TRANSFORMER WILL BE DESTROYED!
transformers to master unit.
2. Locate the two (2) sets of red/wht transformer leads on
the lower left corner of the master unit. Connect one pair
of low voltage leads to each transformer located in the
bottom of the rough-in.

FIGURE 14

FIGURE 15

INSTALLATION (Continued)
CONNECTING THE MASTER STATION TO
THE TERMINAL BOARD
1. Refer to Figures 16 and 17. Plug all five connectors into
the terminal board.
1. • Insert black ribbon cable with 10 pin plug into CN104
connector.
1. • Insert multi-color ribbon cable with 14 pin plug into
CN102 connector.
1. • Insert multi-color ribbon cable with 9 pin plug into CN106
connector.
1. • Insert brown shielded cable with 12 pin plug into CN101
connector.
1. • Insert gray shielded cable with 11 pin plug into CN116
connector.
1. • No connection is made to connector CN111 unless
IAA-440 expansion module is used.
2. Make sure the alignment keys are properly aligned before
applying pressure to the connector.
3. After all connectors are plugged into the terminal board,
position the extra ribbon cable length toward the top of the
rough-in frame.
4. If an IAA-440 expansion module is included in this
installation, proceed with the connection of the module to
the expansion module terminal board at this time. Refer to
the installation instructions provided with the expansion
module.

FIGURE 16

CN106
MULTI-COLOR
RIBBON CABLE
WITH 9 PIN PLUG

CN101

CN116

GRAY CABLE
WITH 11 PIN
PLUG

BROWN CABLE
WITH 12 PIN
PLUG
CN104

CN102
BLACK RIBBON
CABLE WITH
10 PIN PLUG

CN111
USED WITH
OPTIONAL IAA-440
EXPANSION
MODULE

MULTI-COLOR
RIBBON CABLE
WITH 14 PIN
PLUG

FIGURE 17

INSTALLATION (Continued)
CONNECTING THE RADIO ANTENNA

CONNECTING THE OPTIONAL
CHIME MODULE

1. Refer to Figure 18. Plug radio antenna (supplied with
IR105 rough-in frame) into the 2-pin connector located on
the main circuit board. Be certain the tab on the connector
is facing towards the top of the master unit, as illustrated.

It is now time to connect the optional chime module that you
earlier installed into the master station.
1. Refer to Figure 20. Identify the front chime pushbutton
wires.
2. Connect the front pushbutton wires to the screw terminals
marked FRONT and COMMON on the chime module.
3. Repeat steps 1 and 2 for the REAR and SIDE chime
pushbuttons.
4. Refer to the instructions packed with the chime module
for information on chime volume level and chime tune
selection (IA-29 only).

TAB

FRONT
REAR
SIDE
COMMON

FIGURE 18

CHIME
VOLUME

NOTE: Any excess antenna cable should be located
outside of Rough-in.
In most locations the antenna supplied with the rough-in
frame provides adequate AM reception; however, in rural or
weak signal areas, a separate AM antenna may be required.
Refer to the following instruction when selecting and
connecting an AM antenna.
1. Refer to Figure 19. Move the auxiliary antenna selector
switch to the AM position.
2. Connect 50 feet of 22 ga. insulated wire to the screw
terminal marked AM ANTENNA.
3. Run the wire from the master station 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.

FIGURE 20

CONNECTING OPTIONAL
ELECTRONIC CHIME
1. Refer to Figure 21. Connect NuTone IW-2 cable from the
chime to the (+) and (-) screw terminals on the master
station’s main circuit board.
2. Refer to the instructions packed with the chime for
complete wiring information.
IMPORTANT: Failure to use NuTone IW-2 cable will
cause the system to hum at all times.

AM/FM
AM ONLY

AM ANTENNA

(–)

(+)

ELECTRONIC
CHIME

FIGURE 19

FIGURE 21

INSTALLATION (Continued)
CONNECTING OPTIONAL ACCESSORIES

CONNECTING POWER TO THE OPTIONAL
CP-95 CASSETTE PLAYER

1. Refer to Figure 22. To connect an external audio source
(NuTone Model CP-95 cassette, stereo system, VCR, TV,
etc. with low level audio output) to the IMA-4406 master
station, locate the TAPE and AUXiliary inputs on the
upper center of the master station’s main circuit board.
2. Connect an RCA™ phono type plug to the shielded audio
cable coming from the external audio source. Follow the
phono plug manufacturer’s instructions when connecting
to the cable.
3. Insert the phono plug into the appropriate input jack
(TAPE or AUX) on the master station’s main circuit board.
NOTE: The TAPE and AUX inputs have input audio level
controls to allow matching of the external audio source
with the radio and CD audio of the master.
4. To use the selected source audio for recording onto a
cassette recorder, insert the recorder’s plug into the
master station’s LINE OUT jack.
5. Optional connection to provide program audio only:
• The CD, radio or optional audio sources can be
channeled through an auxiliary amplifier (purchase
a NuTone Model IMA-516 separately) to provide
uninterrupted music (no intercom) to separate
speakers. This type of installation can be used for
example, in a doctor’s office where intercom and
music are desired in the office area, but music only
is desired in the waiting room.
• NOTE: If an auxiliary amplifier is used, connect the
master station’s LINE OUT jacks to the auxiliary
amplifier’s low-level audio input wires using shielded
audio cable (not supplied by NuTone).
• NOTE: When using the LINE OUT for recording
program audio or distributing program audio only
through an external amplifier, the automatic CD PAUSE
should be disabled or the audio present on the LINE
OUT jack will stop when the intercom or chime is used.
To disable the CD PAUSE, refer to the homeowner’s
manual.

1. Refer to Figure 23. Cut the protective sleeving from the end
of the BLK/WHT CP-95 power supply leads.
2. Separate 2 inches of the supply leads.
3. Strip the outer insulation back approximately 5/8˝ from the
end of the cable.
4. Connect the power leads from the CP-95 to the CP-95 power
supply leads of the master station (polarity is not important).
Use wire nuts to protect the bare wires from shorting.

CONNECT CP-95
POWER LEADS

FIGURE 23

IMPORTANT
Be sure the power to the transformers in the IR-105 rough-in
is OFF before connecting the CP-95 power supply leads!!

AUX INPUT
LINE OUT

TAPE INPUT

FIGURE 22

INSTALLATION (Continued)
MOUNTING AND CONNECTING
OPTIONAL DOOR RELEASE PUSHBUTTON

clearance hole must be drilled behind the mounting bracket
before securing the master station panel.

You have previously prepared the master station for the
optional release pushbutton.
1. Refer to Figure 24. Feed one wire from the door release
transformer and one wire from the door release mechanism
through the pushbutton hole in the master station panel.

POWERING UP THE SYSTEM

Once all connections have been completed throughout the
system, it is time to apply power to the master station.
CAUTION
WHEN RAISING THE MASTER PANEL TO ITS FINAL
POSITION, DO IT SLOWLY! BE CAREFUL NOT TO HIT OR
DAMAGE ANY OF THE CIRCUIT BOARDS OR CABLES.

FIGURE 24
2. Connect the two (2) wires to the PB1WHCL pushbutton.
3. Rotate the pushbutton so the screws are on the top and
bottom as illustrated, then snap the button into the
mounting hole.

CONNECTING THE MEMORY
BACK UP BATTERY
Refer to Figure 25. Connect the 2-pin plug from the battery
to the connector located on the control circuit board.

SECURING THE MASTER PANEL
2 PIN PLUG

FIGURE 26

1. Refer to Figure 26. Inspect all wiring connections to make
sure they are complete and correct.
2 PIN
CONNECTOR
2. Make sure all antenna connections are secure.
3. Dress all remote station wires flat against the terminal
board.
4. Position the master station panel over the rough-in frame
and align screw holes in master with mounting brackets.
Two (2) mounting holes are located behind the CD
Player door.
5. Secure the master station panel to the rough-in mounting
brackets with four (4) screws (provided).
NOTE: The mounting screws will pierce the wall surface
FIGURE 25
behind the mounting brackets. If the wall surface is hard, a

1. Apply power to the master station by turning on the circuit
breaker that supplies power to the transformers in the
IR-105 rough-in frame.
2. When power is first applied, the LCD display will flash
1:00 PM. Refer to the Operational Checkout section of
this manual for additional information.

PLEASE NOTE
If permanent AC power has not been connected, or the
AC power will be off for long periods of time, the
battery should not be connected at this time. When the
battery is connected, the correct time and programmed
radio memory stations will be retained for
approximately 30 hours on battery backup.

OPERATIONAL CHECKOUT
SYSTEM OPERATING CONTROLS
st UP/DOWN TUNING: Provides manual tuning of the AM/FM radio.

21 DISPLAY: Sets the LCD display mode: CLOCK, RADIO FREQUENCY,
TRACK NUMBER or TIME PLAYED.

MEMORY 1-6 KEYS: Provides direct access to stored radio
frequencies.

22 INTERCOM VOLUME: Adjusts intercom audio level throughout the
system.

TRACK
tracks.

: Returns to the beginning of the current track and/or previous

TRACK

: Advances the CD Player to the beginning of the next track.

23 MASTER STATION STATUS SWITCHES: Sets the master station in
one of the following modes: RADIO/INTERCOM, INTERCOM ONLY,
OFF or MONITOR.

RDM/RPT: (Random/Repeat) Set the CD play mode to: REPEAT ONE,
REPEAT ALL or RANDOM PLAY.

PLAY/PAUSE: Activates the operation of the CD Player. Pressing the
key during play operation will pause the CD Player.

24 REMOTE STATION STATUS SWITCHES: Sets the remote stations in
one of the following modes: RADIO/INTERCOM, INTERCOM ONLY,
OFF or MONITOR. Note: If the optional expansion module is installed, 6
additional switches will be located on the right side of the master.
25 DOOR RELEASE KNOCKOUT: Mounting hole for optional door
release pushbutton.

: Quickly searches the track in the forward direction.

SCAN: Activates scan tuning during AM/FM operation.

1
2

SEARCH : Quickly searches the track in the reverse direction.
10 CD PLAYER DOOR: Open CD door and snap CD disc onto spindle.

26 END CALL: Ends intercom communication and returns system to audio
source.

11 TIME SET: Used with the s t keys to set the clock and timer.

27 DOOR TALK: Initiates intercom communication to the door speakers.

12 MEMORY SET: Stores desired radio frequencies into a selected
memory location.
13 CLOSE: Press here to close CD Player door.

28 INSIDE/PATIO: Initiates intercom communication to remote stations.

14 TREBLE: Adjusts the high frequency audio content of the source audio.

30 PROGRAM AUDIO SOURCE: Selects the program audio source: AM,
FM, TAPE and AUX. The indicator light will illuminate next to the
selected program audio source.

29 TIMER: Enables or disables the radio timer. The indicator light will
illuminate next to the Timer key when the Radio Timer is activated.

15 STOP: Ends the CD Play mode and turns off the program audio.
16

BASS: Adjusts the low frequency audio content of the source audio.

17 SYSTEM VOLUME: Adjusts the program audio level throughout the
system.
18 OPEN: Causes the CD Player door to open.
19

ELECTRONIC CHIME TUNE SELECTION: Selects the tune of the
optional NuTone IA-29 Chime Module.

32 PROGRAM OFF: Turns off the selected program audio source. The
program Off key does not affect the intercom or chime operation.

LOUDNESS: Compensates for the bass and treble response the human
ear has when listening to audio at low volume levels.

33 MASTER VOLUME: Adjusts the volume at the master station.

20 MICROPROCESSOR RESET: Initiates a reset of the microprocessor.
NOTE: A reset of the microprocessor will erase the system’s memory.
1

33
32
31
30
29
28
27
26

23 22

21 20 19 18 17 16 15 14 13 12 11 10

OPERATIONAL CHECKOUT (Continued)
DIGITAL CLOCK

3. Press the END CALL key. Intercom communication will
end and radio audio will return to all stations in the system.
4. Press the DOOR TALK key. Radio audio will mute and
audio from the initiating station will be heard at the door
speaker(s) and all stations in the system.
5. Release the DOOR TALK key. Audio from the door
speaker(s) will be heard at all stations in the system.
6. Press the END CALL key. Door communications will
end and radio audio will return to all stations in the
system.
7. Press and hold the END CALL key for 2 seconds at any
remote station. The radio will turn off.
8. Press and hold the END CALL key for 2 seconds at any
remote station. The radio will turn on. For additional
information on remote radio control, refer to the
homeowner’s manual.
9. With a CD in the CD player, press and hold the END
CALL key at any remote station until a BEEP BEEP is
heard at the remote station. In a few moments, the CD
will begin playing.
10. Press and hold the END CALL key for 2 seconds at any
remote station. The CD player and audio will stop. For
additional information on remote CD Player control, refer
to the homeowner’s manual.
11. Repeat procedure at all remote stations.

SETTING THE TIME
The proper clock setting procedure is arranged in 4
segments. Each segment must be completed in 5 seconds.
Follow the procedure below.
1. Press the TIME SET key one time. SET
TIME
The ‘Hours’ display will begin
flashing, and the words ‘Set Time’
PM
will display.
2. Within 5 seconds, press the s or t key until the correct
Hour and AM/PM are displayed.
3. Within the next 5 seconds, press the TIME SET key
again. The ‘Minutes’ display will begin flashing.
4. Again, within 5 seconds, press the s and t keys until the
correct minute is displayed.
5. Release the keys after entering the correct time. The
display will stop flashing in 5 seconds, and the time will
be set.
NOTE: Pressing the s or t keys momentarily will cause the
time to advance or reverse one digit. Pressing the s or t
keys continuously for more than 1⁄2 second will cause the
digits to advance or reverse at high speed.

1:00

SYSTEM CHECKOUT
Set the following control settings and perform the indicated
tests.
1. Set all STATION STATUS SWITCHES to the RADIO
INTERCOM position.
2. Set the MASTER VOLUME control to 2⁄3 position.
3. Set each remote station VOLUME control to 2⁄3 position.
4. Set the SYSTEM VOLUME control to 1⁄3 position.
5. Set the INTERCOM VOLUME control to 2⁄3 position.
6. Set the BASS and TREBLE control to 1⁄2 position.
7. Press the OPEN key on the master station. The CD
Player door will open. Complete opening the door by
moving the CD door from left to right.
8. Snap a CD disc onto the spindle of the CD player.

SETTING PROGRAM AUDIO CONTROLS
The volume levels required at each station may vary with the
location of the speaker and the size of the room where the
speaker is located. Spend some time experimenting with the
volume levels, and adjust each speaker so that you can
clearly hear the radio, CD and intercom. Use the following
procedures to set your system’s volume levels.
1. At each remote station, turn the VOLUME control
completely clockwise to maximum volume.
2. At the master station, set the REMOTE and MASTER
SPEAKER STATUS SWITCHES to the RADIO
INTERCOM position.
3. Turn the MASTER VOLUME control to maximum volume.
4. Turn the SYSTEM VOLUME control on the master station
to approximately 1⁄3 volume.
5. Select an AM or FM radio station with a strong, clear signal.
6. Adjust the master station’s SYSTEM VOLUME control
until you have ample volume at the remote station that
requires the highest volume (i.e. a large living room, family
room, basement, etc.)

CAUTION
Never touch the lens of the CD player or damage
will result!
9. Close the CD player door by moving the door from right to
left until the door latches closed.
10. Tune in a strong local FM radio station as follows:
• Press the FM key.
• Locate a strong FM radio signal by using the s t keys.
Beginning with the master station, check each station in the
system for proper operation using the following procedure.
1. Press the INSIDE/PATIO key to initiate a call. Radio
audio will mute.
2. Release the INSIDE/PATIO key to hear the reply.

PLEASE NOTE: The master station and all remote stations
(except door speakers) are equipped with 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.

OPERATIONAL CHECKOUT (Continued)
SETTING PROGRAM AUDIO CONTROLS
(CONTINUED)

SETTING THE BEEP TONE LEVEL
The internal BEEP tone volume control has been factory set
to a normal level for the BEEP tone to be heard when the CD
Player operation is initiated from a remote station by using
the AM/FM/CD CONTROL/END CALL key. Should that level
require adjustment, use the following procedure:
1. Refer to Figure 28. Using a thin-blade screwdriver, adjust
the BEEP TONE volume control counter-clockwise as
viewed from the rear of the master station panel to reduce
the BEEP level.
2. To increase the BEEP level, turn the control clockwise.

7. Adjust the MASTER VOLUME control and all remote
station’s volume controls to the volume level you desire.
In order to have proper intercom audio levels, it is
recommended that the MASTER VOLUME and remote
stations’ VOLUME controls be set at 2⁄3 volume or higher.

SETTING INTERCOM VOLUME
1. Initiate an intercom call from the master by pressing the
INSIDE/PATIO key.
2. Speak with a clear normal voice about 2-3 feet from the
master station’s speaker.
3. Adjust the INTERCOM VOLUME control until the initiating
station’s audio is clearly heard at all stations in the
system.
PLEASE NOTE: The volume control at all stations should be
set between 1⁄2 to maximum volume for proper intercom
operation.
4. Repeat the above procedure at several remote station
locations until an acceptable intercom audio level is
achieved at all stations.

BEEP TONE

SETTING INTERNAL INTERCOM VOLUME
CONTROL

FIGURE 28

SETTING THE EXTERNAL AUDIO
SOURCE LEVEL

The internal intercom volume control has been factory set for
optimum intercom operation. Should the intercom gain need
to be adjusted beyond the range of the Intercom Volume
Control behind the left front door, use the following procedure:
1. Refer to Figure 27. Using a thin-blade screwdriver, adjust
the internal control counter-clockwise as viewed from the
rear of the master station panel. This adjustment will
reduce the intercom gain.
2. To increase the intercom gain, turn the internal control
clockwise.

The TAPE and AUX level controls have been factory set at
maximum. These controls can be adjusted to match the
external audio source level with the built-in radio and CD
Player levels. Use the following procedure:
1. Press the FM key.
2. Tune the radio to a strong local radio station.
3. Turn on the external audio source(s) connected to the
master station.
4. Switch the master station from FM to TAPE or AUX.
5. Refer to Figure 29. Using a thin-blade screwdriver, adjust
the TAPE/AUX control to match the audio level of the
external audio source with the FM radio.

ROUGH-IN

AUX
LEVEL

BOTTOM OF
MASTER

TAPE
LEVEL

FIGURE 27
FIGURE 29

OPERATIONAL CHECKOUT (Continued)
DIAGNOSTIC TESTS

Remote Station Control Voltage Test – Displays the
voltage at the master’s microprocessor control line. To
activate, press and hold the following keys:
1. s key
3. Memory 2 key
4. Release all keys
2. t key
Example:

The following diagnostic tests have been incorporated into
the NuTone IMA-4406 master station to assist in system
troubleshooting.
• Master station keyboard test
• Remote station control voltage test
• Display test
The following applies to all diagnostic tests:
1. To access any of the diagnostic tests, the system must be
in the PROGRAM OFF mode.
2. Pressing the MEMORY SET key will end the current
diagnostic test.
3. The current diagnostic test will end after one minute of
inactivity.

Display
2:3.0
2:1.9
2:0.1

Voltage at Microprocessor
3.0 volts
1.9 volts
.1 volts

In this mode, the hours represent the diagnostic test, and the
minutes indicate the voltage at the master station’s
microprocessor.

PLEASE NOTE: An incorrect voltage caused
by miswiring, shorted wiring or a defective
remote station may cause the radio and/or CD
Player to turn off/on, thus preventing the unit
from entering the diagnostic mode. Should this
occur, the master station’s control timer will stop
the on/off cycling after 30 seconds.

KEY

DISPLAY

KEY

DISPLAY

No key

1:00

Memory 2

1:14

Scan

1:01

Memory 3

1:15

1:02

Memory 4

1:16