Operation, Testing & Maintenance - Universal Security Instruments MDS107CN Instructions Manual

Interconnected CO alarms or CO alarm circuit of combination smoke and 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 smoke alarms without battery backup will not respond during an AC power failure.
NOTE: Relay Modules/USI-960 will not respond if a CO alarm / event initiates the alarm.
The yellow wire is used only for multiple station operations with USI ELECTRIC or UNIVERSAL
Model alarms only. Connecting this yellow wire to any other circuits may result in damage
and alarm malfunction. When alarms are interconnected, all alarms 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.
The wiring to be used shall be in accordance with the provisions of the Canadian Electrical
Code. In addition, the resistance of the interconnecting wiring shall be a maximum of 10
Ohms.
2. Attach the mounting bracket to the electrical junction box.
3. To activate 9 volt battery and alarm, hold the QUICK DRAW
remove the PULL-TAB. Confirm that the entire PULL-TAB has been completely removed. Discard
PULL-TAB.
4. Plug the AC QUICK CONNECTOR into the alarm base. Push and twist the alarm clockwise
onto the mounting bracket.
5. See "OPTIONAL TAMPER RESISTANT FEATURES" and "TO ACTIVATE THE LOCKING
FEATURES" instructions on Page 4.
6. Turn on AC power and check the LED's for proper operation. The green LED should be on to
indicate AC power. The red LED blinks on once approx. every 40 seconds to indicate proper
operation.
OPERATION: The smoke alarm is operating once the AC power is connected and turned on (the
battery must also be installed). When products of combustion are sensed, the alarm sounds a loud
alarm which continues until the air is cleared.
This alarm incorporates the NFPA recognized horn signal for evacuation. During alarm mode, the
horn produces three long beeps followed by a two second pause and then continuallyl repeats.
READY/ACTIVE CONDITION: The red LED blinks on once approx. every 40 seconds to indicate
the alarm is properly functioning.
LOCAL ORIGINATING ALARM CONDITION: The red LED blinks on approx. every 2 seconds
and the alarm emits a loud, pulsating alarm sound.
NON-ORIGINATING ALARM CONDITION: The red LED is off and the alarm emits a loud, pulsating
alarm.
GREEN LED: The green LED is on whenever AC power is turned on.
120 VAC 60Hz
100mA Max.
OPERATION, TESTING & MAINTENANCE
Page 6
(R) battery drawer closed, pull and