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5
CONNECTING VOLUME CONTROL WIRING
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 IA-440 expansion module will increase the
system remote capability to 15 stations.
Refer to the installation instructions packed with the speaker
volume control for wiring this unit.
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.
PREPARING MASTER STATION PANEL FOR
OPTIONAL DOOR RELEASE PUSHBUTTON
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.
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.
MOUNTING THE OPTIONAL CHIME
MODULE IN THE MASTER STATION PANEL
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.
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.
INSTALLATION (Continued)
NEVER USE 8 OHM STEREO SPEAKERS
WITH THIS SYSTEM!
FIGURE 5
FIGURE 6
FIGURE 4
FIGURE 7
SNAP IN PLACE
RED
WIRE
IA-29 ONLY
ORN
ORN/WHT
DOOR
SPEAKER