5
LOW-RISE GARDEN APARTMENTS
A typical system includes an entrance directory (with pushbuttons and speaker), apartment
speakers (with built-in door buzzer or a separate door chime), and an electric door release.
OUTPUT
HI RED
DOOR BLK
DOOR
BLK / WHT
CHIME
AC
INPUT
ORN
AC
CHIME
MODEL 301T
TRANSFORMER
481B OR
N482-BX
APART-
MENT
SPEAKER
TO 3RD FLOOR
APARTMENTS
TO 3RD FLOOR
APARTMENTS
DOOR RELEASE
WIRE
TO APT. SPEAKER
1ST FLOOR
BUZZER WIRE
TRANSFORMER WIRE
IW-6
2ND FLOOR
BUZZER
WIRE
TO
DOOR
RELEASE
IMA-516
CENTRAL
AMPLIFIER
NUTONE IW-6, 4000 FT. MAX. PER SYSTEM.
500 FT. MAX. ANY ONE RUN
NUTONE IW-2
(400 FT. MAX.)
481-B or 482-BX
APARTMENT
SPEAKER
BLK/W
RED
ORANGE
BLACK
120vAC,
60Hz HOUSE
POWER
OBSERVE
LOCAL CODE
2500 FT. MAX. TO
LAST SPEAKER BUZZER
(18GA.) 2000 FT.
MAX. BETWEEN DOOR RELEASE
AND LAST SPEAKER
FIELD
GROUNDING
WIRE
14 GA.
DR-1 DOOR
RELEASE
(OPTIONAL) POSTAL LOCK
SWITCH (MODEL 499).
DOTTED LINE WIRING
MAIN ENTRANCE
DIRECTORY MODEL 498
OR INDIVIDUAL DOOR
SPEAKERS WITH
PUSHBUTTONS
18 GA.
18/2
(NUTONE S-143)
18 GA.
1ST FLOOR
18 GA. SINGLE CONDUCT
OR OR MUL
TI-CONDUCT
OR CABLE
18 GA.
1
2
3
RADIO
VOLUME
CONTROL
INTERCOM
VOLUME
CONTROL
OUTPUT
LO
RED WHT
INPUT
ORN/WHT
DECREASE
INCREASE
DECREASE
INCREASE
RED/W
ORANGE
TO
TRANSFORMER
(For systems using 481-B or N482-BX speakers with buzzers)
TYPICAL SYSTEM LAYOUT
The IMA-516 system can be used for two types of apartment layouts: (1) low-rise garden apartments that have a single entrance,
(2) townhouse apartments that have separate entrances for each apartment.