Frequently Asked Questions: Intercoms
What type of wire should be used
with the radio intercom systems?
IWA3 wire is to be used with the IM3303 system
IW6 wire is to be used with the IM4406 and IM5000 systems
IW2 and S143 (18/2) may be used with all systems
These are our wire models and are specifically manufactured to our specifications
for optimum performance with our systems. The audio input and output wires
are isolated from one another to allow proper audio and control of your
May "CAT - 5" wire be used to install
No. The NuTone radio intercom systems were designed
for specific wire types to assure proper operation, minimal loss and attenuation
of all the functions of the systems. NuTone specifies 3 wire, 4 wire,
and 6 wire cable for proper installations depending on the system model.
I have an old three (3) wire intercom
system, what may I replace it with?
The IM3303 radio intercom system would be the update
master. More than likely you would be required to replace all speaker
and master station rough ins, the master station and the speaker stations.
The wiring should remain intact. Note: All speaker runs must be home run
back to the master station!
How is it determined if the wiring
infrastructure is looped or home run?
Older systems were designed with either 3 wire, 6 wire
or 8 wire cables connected to the remote speakers. A number count of the
cables at the master station and the number of remotes must be performed.
If the number counts are equivalent, then you have home run wiring. If
the number of wires counted is less than the number of speakers, then
this is a loop wired system.
How many wires are necessary to
install the door speaker?
You will be required to run four (4) wires - IW2 for
the speaker connection and S143 (18/2) for the pushbutton. If this is
just a door speaker, then only the IW2 is required.
The radio and intercom operate properly,
but the chime tones are too loud within the system, what may be done to
decrease the tones?
If using a chime module or an external electronic chime,
there are volume controls on these devices that may be lowered to the
acceptable level for your system.
How do you determine the model number
of a master station?
Most NuTone master units have the model number displayed
in the lower right hand corner of the master station or if on the inside
or outside, there is door on the front panel, then it will be displayed
inside the door(s).
How many speakers may be used with
the IM5000 intercom?
The IM5000 intercom system will accommodate 20 remote
speakers and three (3) door speakers.
Why does the IM3303 master show
"IC" in the display?
The remote stations are attempting to send a control
signal to the master and there is an issue with the send/receive functions.
How can I eliminate the "IC" issue?
Solutions vary depending on the cause, but to temporarily
remedy the issue, you may do either of these techniques. Turn off the
"remote power switch and the remote tuning switch" located on the master
station. Reset of the microprocessor may remedy the issue. This is accomplished
by locating the small hole beside the memory set button (ie: lower front
right side of master) and insert a small cylindrical device into the hole
and depress the recessed button and release. The display should return
to 1:00pm, which will allow you to reprogram the time and radio stations.
For a permanent resolution, the remote station that is causing the issue
must be identified and replaced.
May the IS445 intercom speakers
be used with the IM3303 master station?
No. The IS445 speakers are the six (6) wire system speakers
designed to operate with the IM4406 master station. The IS335 speakers
are the three (3) wire system speakers designed to operate with the IM3303
master station. (Note: The IM5000 uses the IS515 six (6) wire speakers.)
Can a CD Player be connected to
Yes. There are two line level input jacks on the IM3303
to allow multiple peripheral source connections to the system. Standard
"RCA" jacks are used to make the connections. Connect the source
output (a pre-amp level signal) to the IM3303. Amplification will take
place within the IM3303 master station.
Can a "door release" be added to
my IM3303 system?
Yes. The pushbutton in the master and the pushbuttons
near the remotes will be required to operate with their own transformer
and the door release mechanism.
Is the IM3303 master station available
in black like the remote speakers?
No. The IM3303 master station is only available in "Bright
White" and "Biscuit".
Does the IM3303 have the "hands
free" answering feature from the remote speakers?
The IM3303 system has hands free answering only from
the master station. If a call is initiated from a remote station, the
respondent will be required to use the controls.
Can the speakers from an IM3003
system be used with the IM3303 master station?
Yes. The IM3003 system speakers are compatible for use
with the IM3303 master station.
Are you able to "loop" speakers
or have multiple speakers on the same wire run with the IM3204, IM3303,
or the IM4406 systems?
No. These systems are "home run systems" as each speaker
is wired individually back to the master station.
Can additional inside speakers be
installed with the IK15 or the IK25 systems?
No. Additional speakers are not compatible for the amplifier
design and possible failure of the amplifier could occur. An IS-68 door
speaker may be added to these systems.
Can an IS69 be used with the IK25
No. The IS69 is a door speaker designed for our larger
intercom and radio intercom systems.
What is the private button for on
the IS445/IS448 speakers?
This feature allows control for the users so that no
monitoring may occur at those stations when in the "private mode".
Can more than 1 room be monitored
with the IM5000 system?
Yes, multiple rooms may be monitored with this intercom
Can the speakers from an IM4006
system be used with the IM4406 master station?
Yes. The IM4006 system speakers are compatible for use
with the IM4406 master station.
May the 900 series speakers be used
with the intercom systems?
Yes. These are used for music distribution only. Intercom
communication is not compatible with these speakers.