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INSTALLATION INSTRUCTIONS
READ & SAVE THESE INSTRUCTIONS!
Two-Note Door Chime
MODEL: LB-18, LB-76 SERIES
• Designed for two-door operation.
• Model LB-76 is designed to be used with a NuTone
Radio-Intercom system.
WIRING CAUTIONS: Before installing the transformer
and chime, turn off the house power and leave it off until
installation is complete.
Carefully fasten wiring to wall studs and ceiling joists
– avoid short circuits caused by staples or clips cutting
through the wiring's insulation. When drilling into walls,
be careful not to damage existing electrical cables.
All wiring must comply with local codes or the
National Electrical Code. If you are unfamiliar with
electrical wiring installation methods, secure the
services of a qualified electrician.
NOTE: NuTone Model 101T (16V - 15VA) transformer
is included with Model LB-76 Door Chime.
INSTALLATION
1. NuTone chimes are designed to be seen as well as heard.
Locate the chime on a wall at eye level.
2. Mount the transformer to a convenient junction box or
panel box. Connect the 120v AC house power leads to
the transformer wires as follows: black to black;
black to white.
NOTE: Label all wires as they are run.
3. Run 20-gauge, 2-conductor wire from the transformer
terminals to the chime site.
4. Wire and mount the pushbuttons. Run 20-gauge,
2-conductor wire from the pushbutton to the chime site.
5. If connecting Model LB-76 chime to a NuTone Radio-
Intercom, run NuTone IW-2 cable (22-gauge, 2-conductor)
from the Radio-Intercom to the chime site. For
connections to the Radio-Intercom, see instructions
packaged with the Radio-Intercom Master Unit.
6. Pull all of the wires which have been run to the chime site
through chime baseplate. Mount baseplate with supplied
screws.
7. Connect wires as shown in Figure 1. Where applicable,
make connections to Radio-Intercom as shown
in Figure 2.
8. Be certain the wires are not touching the chime tone bars
or the power unit.
9. Restore the house power to transformer and test chime.
If chime does not respond to pushbutton, check wire
connection.
10. Install the chime over the baseplate.
FIGURE 2
FIGURE 1
CHIME WIRING DIAGRAM
CAUTION: DO NOT USE THIS TRANSFORMER
FOR INTERCOM OR OTHER APPLIANCE
FRONT
TRANS
REAR
FRONT DOOR
PUSHBUTTON
20-GAUGE INSULATED
2-CONDUCTOR WIRE
COMMON
WIRES
120v AC
WIRING
NUTONE 101T
TRANSFORMER
REAR DOOR
PUSHBUTTON
INTERCOM CHIME VOLUME CONTROL
TERMINAL BOARD
1
2
NUTONE IW-2 CABLE
FROM RADIO-INTERCOM TO MODEL LB-76
HOMEOWNER'S INFORMATION
“Sluggish” chime plungers
If chime plungers should ever get “sluggish” in their
movement, clean the plungers with a non-flammable
cleaning fluid and wipe dry.
CAUTION: Never oil chime plungers.