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Interconnected CO alarms will only respond if a CO alarm / event initiates the alarm.
All other alarms remain silent.
Interconnected smoke alarms, heat alarms and relay modules will only respond if a
smoke alarm / event or heat alarm / event initiates the alarm. All CO alarms remain
silent.
Note that units without battery backup will not respond during an AC power failure.
The yellow wire is used only for multiple station operation with USI ELECTRIC Model alarms
only. Connecting this yellow wire to any other circuits may result in damage. When alarms
are interconnected, all units must be powered from a single AC branch circuit. If local codes
do not permit be sure the neutral wire is common to both phases. The maximum wire run
distance between the first and last alarm/device in an interconnected system is 1,000 feet.
NOTE: Use standard household wire (18 gauge or larger, rated at least 300V, as required by
local codes) available at all electrical supply/hardware stores.
3. Attach the mounting plate to the electrical junction box.
4. To activate the 9 Volt battery and alarm, hold the QUICK DRAW
TM
pull-out
battery drawer closed,
pull and remove the PULL-TAB. Discard PULL-TAB.
5. Plug the AC QUICK CONNECTOR onto the alarm base. Push and turn the alarm clockwise
onto the mounting plate.
6. See "TAMPER LOCKING PIN."
7. Turn on AC power and press the TEST/RESET button and check the LED's for proper operation
(see TESTING YOUR ALARM). After test sequence, the green LED lights to indicate AC power
and blinks off approximately every 20 seconds to indicate proper operation.
OPERATION, TESTING & MAINTENANCE
OPERATION:
The alarm is operating once the power is connected and turned on (for Model USI-
7390, the battery must also be installed). When CO gas is sensed at a high level or at a low level for
a lengthy period of time, the unit sounds a loud alarm which continues until the air is cleared, or the
alarm is reset.
TESTING YOUR ALARM:
Test alarm monthly for proper operation by pushing the test button.
Release the button. The green LED will go off and the yellow LED will come on. The alarm will then
test itself for proper operation and the red LED will flash on two 4-pulse patterns and the alarm will
simultaneously sound two 4-pulse patterns. The alarm then resumes normal operation.
STANDBY CONDITION:
The green LED is on and blinks off approximately every 20 seconds
whenever AC power is turned on.
LOCAL ALARM CONDITION:
The red LED flashes on and the unit emits a loud, pulsating alarm
(4 short beeps, pause/4 short beeps, pause, until reset).
If the local alarm is self-cleared, i.e. the carbon monoxide level returns to normal, the green LED
flashes off and on until manually reset.
REMOTE ALARM CONDITION:
The red LED is off and the unit emits a loud, pulsating alarm
(4 short beeps, pause/4 short beeps, pause, until reset).
INPUT:
120 VAC 60 HZ
100mA
