NuTone 478-76.478-77 installation instructions Apartment House Intercoms, Models 478-76

INSTALLATION INSTRUCTIONS

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Apartment House

Intercoms

MODELS: 478-76 & 478-77

TWISTED

PAIR

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

DIR.	1
	2
	3

478-76

DOOR REL.	INLCUDES:
POSTAL LOCK	467	A2			TWISTED
	478
		A1
	ADAPTOR			TWISTED	PAIR
LOBBY SPKR.
				PAIR
					ADAPTOR BOX
				A2
				A1
		RING COMMON 1			A2
					A1
		CONTROL			RING SWITCH
		GROUND
			16VAC		REMOTE COMMON
			16VAC

301

TRANSFORMER

486B

APT. NO 1

R

A2

A1

C

(Please see other side for Model 478-77)