NuTone LB-55 Wiring Instructions

Musical Door Chime
MODEL LB-55
MODEL LB-60 PROGRAMMABLE CHIME
This musical door chime may be connected to a NuTone
Radio-Intercom System to provide the intercom speakers
with the chime tones. If it is acceptable to have the chime
tones override the radio and intercom (chime heard as well
as radio and intercom,) connect chime to intercom as shown
on the primary instruction sheet for the chime. If you wish the
radio and intercom to be muted (silenced) when the chime
is playing, the connections between the chime and intercom
must be as shown here. If you wish the door speakers, as
well as the inside/patio speakers to receive the chime, see
pages 2 and 3 for wiring information.

MODEL N2510 (2500 SYSTEM)

CHIME
1
I-COM
2
EXT.
2
SPKR.
I-COM
CONTROL
22K OHM
RESISTOR

MODEL SM-428 OR IMA-406

CHIME
1
I-COM
2
EXT.
2
SPKR.
I-COM
CONTROL
100 OHM
RESISTOR

MODEL IMA-303, IMA-323, OR IMD-313

CHIME
I-COM 1
EXT.
2
SPKR.
I-COM
CONTROL
100 OHM
RESISTOR
MUTING as shown in this page and page 4, it should be
considered that music will remain muted after a chime
tune completion – until either an "END CALL" switch is
pressed or the automatic end call timer resets the IM-806
control circuit.

MODEL IMA-203

N2510
CHIME
YELLOW
OR BRN/
YELLOW
PAIR
ANY
BLK/WHT

MODEL IMA-516

INTERCOM
MASTER
CHIME
CHIME
METAL
CHASSIS
GROUND
SCREW
BLACK

MODEL IM-806

INTERCOM
MASTER
CHIME
COMMON
(CENTER)
INPUT
(COPPER)

CHIME WIRING INSTRUCTIONS

READ & SAVE THESE INSTRUCTIONS!
*SPECIAL NOTE: In IMA-806 systems connected for
I-COM 1
EXT.
2
SPKR.
I-COM
CONTROL
100 OHM
RESISTOR
DOOR SPEAKER CONTROLLED BY "DOOR ON/OFF"
SWITCH ON IMA-203 MASTER
CHIME
1
I-COM
2
EXT.
2
SPKR.
I-COM
CONTROL
100 OHM
RESISTOR
CHIME
I-COM 1
EXT.
2
SPKR.
I-COM
CONTROL
6800 OHM
RESISTOR
INPUT
(COPPER)
COMMON
(CENTER)
ORANGE
WIRE
(PLUG P1,
PIN 7)
IMA-516
CHIME
CHIME
RED/WHT
BLACK
IM-806
EXT.
}
CHIME
EXT.
CHIME
GROUND
REMOTE
HOOK-UPS
(BLK)
* SEE SPECIAL NOTE