NuTone 478-76.478-77 Leaflet
Apartment House
Intercoms
Intercoms
MODELS: 478-76 & 478-77
INSTALLATION INSTRUCTIONS
READ & SAVE THESE INSTRUCTIONS!
(Please see other side for Model 478-77)
Model 478-76
Use as a replacement control amplifier for the former Direct-A-Com 1 System,
Model 476 amplifier:
Model 476 amplifier:
1. Install the Model 467 Postal/Main Door Timer module as described in the instructions
packaged with the unit.
2. Wire the amplifier-adapter to the system as shown in the wiring diagram.
TO APT. NO 3
TO APT. NO 2
DIR.
1
2
3
TWISTED
PAIR
DOOR REL.
POSTAL LOCK
LOBBY SPKR.
478-76
INLCUDES:
467
478
478
ADAPTOR
A2
A1
486B
APT. NO 1
R
A2
A1
C
TWISTED
PAIR
TWISTED
PAIR
ADAPTOR BOX
RING SWITCH
REMOTE COMMON
A2
A1
A2
A1
301
TRANSFORMER
RING COMMON 1
CONTROL
GROUND
16VAC
16VAC