NuTone Door LA 174 User Manual

INSTALLATION INSTRUCTIONS  
READ & SAVE THESE INSTRUCTIONS!  
Built-In Electronic Chime  
WIRING  
MODEL: LA-174  
INSTALLATION HINTS  
• This Door Chime is recessed into the wall. The white louvered grille  
is flush-mounted to the wall surface and may be painted.  
• IMPORTANT: If the door chime is connected to a NuTone Radio-  
Intercom System, the chime tones will be heard at all inside and  
outside speaker locations (chime will not sound at door speaker).  
The Door Chime must be wired in accordance with the Chime-To-  
Intercom information that is included in this literature.  
• If a NuTone Radio-Intercom System is not used, a door speaker  
may be installed at the outside of the front door  
IMPORTANT: Be certain all wiring complies with local and  
state codes.  
Disconnect the house power when installing the transformer.  
Keep electricity off until all wire connection have been made.  
When securing the wiring to wall studs or ceiling joist, avoid  
possible shorts that may occur if staples or clips penetrate the  
protective wiring insulation.  
1. Mount the supplied transformer to any junction or panel box.  
Connect the white and black wires from the transformer to the  
matching colors of house supply wires. Use approved wire  
connectors to make all connections.  
2. Refer to Figure 1. Run 18-2 gage wire from the transformer and  
pushbutton(s) to the chime location.  
so chime tones will be heard at that location.  
• Use the NuTone transformer that has been supplied with the door  
chime.  
3. If applicable, run NuTone IW-2 cable (No.22 twisted pair) from the  
intercom master station to the chime location.  
4. If applicable, run NuTone IW-2 cable (No. 22 twisted pair) from  
remote speaker(s) to door chime location.  
LOCATION  
5. Pull wires through knockout in housing. Position the housing flange  
flush to the finished wall surface and carefully secure the housing  
with screws. CAUTION: The printed circuit board is fragile; DO  
NOT use nails or hammer.  
• Select a central location so the door chime will be heard throughout  
the house.  
• Select pushbutton location(s). This door chime can accommodate  
up to three (3) door operations.  
MOUNTING THE CHIME  
MAKING CONNECTIONS  
3
1
Required cutout dimensions: 5 ⁄8" wide x 7 ⁄4" high.  
1. Refer to Figure 1. Make wire connections to terminals shown as  
1
applicable.  
Housing: 2 ⁄4" deep  
2. Upon completion of installation, check whether chime is functioning  
properly by pressing each door pushbutton, if the chime does not  
operate, recheck your installation and the pushbutton(s) for poor  
contact or loose connections.  
Refer to Figure 2. Locate wall stud and prepare wall opening at  
desired location.  
OPTIONAL CONNECTIONS  
HOOK-UP TO RADIO-INTERCOM  
18-22 GA. INSULATED WIRE  
1ST DOOR  
NUTONE IW-2  
PRINTED CIRCUIT BOARD  
Radio-Intercom connections to  
provide chime functions in  
intercom speakers. See Standard  
Chime-to-intercom section for  
specific connections.  
2ND DOOR  
GREEN  
(COM)  
3RD DOOR  
WIRE  
CONNEC-  
18-22 GA.  
TORS  
INSLUATED  
WIRE  
WIRE  
NUTONE IW-2  
YELLOW  
(TRANS)  
CONNECTOR  
HOOK-UP TO EXTENSION  
SPEAKERS (MAX. 3)  
TRANSFORMER HOOK-UP  
120/110 VOLT  
AC WIRING  
Use NuTone IW-2 (22 GA  
Insulated 2-Conductor cable) –  
200 Feet Maximum. Connect  
Speaker to “EXTENSION  
SPKR.” No. 1 and No. 2.  
18-22 GA. INSULATED WIRE.  
MAX. OF 100 FT. EACH WIRE  
FOR 22 GA.  
16 VOLT, 10 VATT TRANSFORMER  
FIGURE 1  
 

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