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LUG
SMOKE
ALARM
B
LK
1
W
HT
1
1
R
ED / YEL
10
VIO
7
V
IO / BLK
6
BLU
3
O
RN 9
Y
EL 4
B
RN 2
B
RN
5
GRAY
GRAY
8
1
2
HOT
NEUT
P
OWER
T
ANDEM
A
LARM
CONTACTS
ACCESSORY
A
LARM
CONTACTS
I
SOLATED
THERMAL
WIRING TWO OR MORE SMOKE ALARMS
Tandem Installation
NOTICE: All smoke alarms in a tandem installation must be
controlled by the same fuse or circuit breaker. Otherwise tandem units
will not operate. Tandem will operate in the event of AC power failure if
battery is connected to the smoke alarm.
LIMITATIONS: A maximum of 12 smoke alarms (9120/9123 or
9220/9223) may be connected together. Do not exceed 125 feet
between each smoke alarm. Do not exceed 1125 feet between first
and last smoke alarm.
NOTICE: A maximum of six (6) smoke alarms of either model
9120/9123 or 9220/9223 with the relay options (F, TF, HF) may be
tandem interconnected.
Wire used for interconnection shall be in accordance with article
760 of the latest edition of National Electrical Code (NFPA 70) and
must not exceed a resistance of 10 ohms.
VAC
ELECTRICAL
B
OX
SMOKE
ALARM
SMOKE
ALARM
Q
UICK DISCONNECT
T
YPE PLUG
E
LECTRICAL
BOX
H
OT / BLACK
NEUTRAL / WHITE
T
ANDEM WIRE
RED / YEL
1. Run a minimum of 16 gauge, 3-conductor cable, plus ground (4
wires) to the first alarm junction box from a power supply and between
all smoke alarms that are to be connected together. Use ANSI/UL
Listed Class 1 wire. Power limited cable for multiple tandem
connections are available at many commercial electrical retail stores.
2. Make wire connections to the supplied plug-in connector as follows:
black to black, white to white, 3rd conductor to the red/yellow wire.
The red/yellow wire should be stripped to make the connection.
Connect ground wire between metal outlet boxes.
BATTERY INSTALLATION
1. Remove smoke alarm from mounting plate by turning counter-
clockwise.
2. Remove AC power connector and unsnap power leads from top of
the old battery. Snap new battery onto snaps and reinsert battery
through hole in back of smoke alarm. WARNING: Units with battery
back-up will not provide power or transmit an alarm to AC only units
in the event of an AC power failure. All battery back-up units in
tandem with good batteries will operate normally during an AC
power failure for a minimum of 24 hours.
3. Use only Duracell MN 1604 battery with the 9000 Series smoke
alarms. Available at many retail stores.
MOUNTING: PLATE & SMOKE ALARM
1. Lace the connector through the provided mounting plate and secure
the plate to the junction box.
2. Plug the wire connector into the smoke alarm base.
3. Place smoke alarm up to mounting plate, rotating it clockwise until
smoke alarm firmly snap locks into place. Keep smoke alarm
parallel to mounting plate so upper and lower tabs on plate seat
correctly into smoke alarm.
CHECKOUT & TROUBLESHOOTING
1. Turn test knob to NORMAL position and install battery and then
supply house power to smoke alarm. The red indicator light should
flash every 15-30 seconds, showing smoke alarm is Operating
properly.
2. If red light is not flashing or the green LED is not on:
a. Check that the battery is installed.
b. Check the connector plug and wire connections. NOTE: Be sure you
turn off power before checking wire connections.
c. If power supply and wiring check out, but red light does not flash or
green LED is still off, return the smoke alarm to manufacturer. See
TO RETURN A SMOKE ALARM.
d. When powering up smoke alarms in a tandem installation and all
smoke alarms sound immediately, inspect all smoke alarms for
those with an illuminated indicator light. These will be the trouble
units.
3. Testing with Test Knob:
a. Rotate test knob counter-clockwise to TEST 1 position and wait up
to 20 seconds for smoke alarm to sound. If smoke alarm does not
sound after 20 seconds, return smoke alarm for service.
b. After successfully testing smoke alarm, return test knob to NORMAL
(non-test) position and wait 20 seconds for alarm to stop sounding.
550-0093
Page 9-5
TOADDITIONAL
SMOKEALARMS
(MAX 12ALARMS
PER SYSTEM)
LIMITATIONS
Maximum of 12
smoke alarms may be
connected together.
Do not exceed 125
feet between each
smoke alarm. Do not
exceed 1125 feet
between the first and
last smoke alarm.
Smoke Alarm Wiring Diagram
RATED LOAD RESISTIVE
1.0 AMP @ 24VDC MAX
0.6 AMP @ 125VAC MAX
0.56 AMP @ 220VAC MAX
CAUTION
RED/YELLOW wire to be
capped when not in use.
This wire is for tandem
connection only. Do not
connect to any other circuit.
START
FINISH
WORK CONNECTOR WIRES BACK
THROUGH HOLE INADAPTER PLATE
ROTATEALARM TO UPRIGHT
POSITION
NOTES ON TANDEM INTERCONNECTING MODELS
DO NOT connect Gentex smoke alarms to other manufacturers'
smoke alarms.
No more than 12 Gentex models 9120T, H/9123T, H or 9220T, H/
9223T, H may be connected in tandem.
No more than 6 Gentex models 9120F, TF, HF/9123F, TF, HF or
9220F, TF, HF/9223F, TF, HF may be connected in tandem.
All units connected in tandem MUST get their power from the same
circuit, that is, all smoke alarms in tandem must be controlled by the
same fuse or circuit breaker.
After installation to verify proper working conditions all horns must
sound in this system.
NOTICE: If all interconnected alarms do not emit alarm signal during
commissioning test, refer to “WIRING TWO OR MORE SMOKE
ALARMS” section to insure alarm wiring is in accordance with tandem
wiring diagam.
CAUTION: Failure to observe any of the conditions set forth may
cause system malfunction and damage to the smoke alarm.
c. To test smoke alarm for high sensitivity, turn test knob clockwise to
TEST 2 position. Alarm should remain silent.
d. Make sure to return test knob back to its normal position.
e. If your smoke alarm sounds during this test it means the smoke
alarm's sensitivity has become too high and may cause false
alarms.