INSTALLATION INSTRUCTIONS
READ & SAVE THESE INSTRUCTIONS!
Apartment House
Intercoms
MODELS: 478-76 & 478-77
Model 478-76
Use as a replacement control amplifier for the former Direct-A-Com 1 System,
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
1
2
3
DIR.
486B
APT. NO 1
TWISTED
PAIR
478-76
INLCUDES:
DOOR REL.
R
467
478
ADAPTOR
A2
A1
TWISTED
PAIR
POSTAL LOCK
LOBBY SPKR.
A2
A1
TWISTED
PAIR
ADAPTOR BOX
C
A2
A1
A2
A1
RING COMMON 1
CONTROL
GROUND
RING SWITCH
REMOTE COMMON
16VAC
16VAC
301
TRANSFORMER
(Please see other side for Model 478-77)
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