This Video shows how a NuTone 478 Apartment Intercom System would be wired, for use in a 2 Entry apartment building when a NuTone Model 469 Auto Call Transfer Module is used. The NuTone 469 Auto Call Transfer Module included both the Model 467 Main Door Timer Module and the Model 468 Second Door Timer Module. The 469 Auto Call Transfer Module allows fro greater building security because it automatically detects which entrance the visitor is located at and locks out the communication and door release from the unused 2nd entry door. A 2 Entry System has lots of additional wiring (depending on how many apartments are in the building) and understanding how the system is wiring is essential if you are working on or repairing this system. We have 2 additional Videos which cover: The wiring of a basic, single entry NuTone 478 System: https://www.youtube.com/edit?video_id=jtag7GsY_so If you are working on a NuTone 478 System - You should watch this video to have a good understanding of how it is wired. Troubleshooting lack of entry communication: https://www.youtube.com/watch?v=bJ633rYgigo&list=PLsTvqKsBnGYe5jX_32rhJuUKjHDPgMBId&index=5&t=3s This video covers the most common problem with NuTone apartment intercom systems For more detailed information about NuTone Intercom Systems: You Can: Visit our web site: http://northsideforyourhome.squarespace.com Or you can email use at: nscompany@msn.com Or you can call us at: 925-743-8236 ... https://www.youtube.com/watch?v=LNg7m0TAXJQ

While many NuTone Intercom Systems have small, 1 piece outdoor Patio Intercom Stations - there are some installations that include the more expensive, deluxe 2 piece Patio Stations. These types of installation will have a small Patio "Remote Control" mounted in a convenient to operate location (like next to the Patio Door) and then there will be a separate large 8" Patio Speaker. The Patio Speaker can be mounted directly above the Remote Control or it can be mounted further away - near the Bar-B-Que , Spa or Pool. Where ever you really wanted to hear the sound. One of the choice for the 8" Patio Speaker was a Surface Mounted speaker in a self-contained enclosure, model IS77 or ISA77 As with all types of outdoor speakers, over time the sun and weather take their toll on the equipment and they will need to be rebuilt. In this Video I take you through the step-by-step of how to rebuild a NuTone ISA77 (this also applies to the earlier Model IS77) For more detailed information about NuTone Intercom Systems and NuTone Door Chimes: You Can: Visit our web site: http://northsideforyourhome.squarespace.com Or you can email use at: nscompany@msn.com Or you can call us at: 925-743-8236 ... https://www.youtube.com/watch?v=ZhNZpmPqgFw