ESL 320A/350 Series Smoke Alarms
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Installation Instructions
Description
ESL 320A/350 Series smoke alarms are single/multiple station
photoelectric AC smoke alarms designed for use in residential
occupancies including hotels, motels, and dormitories. The
320A/350 Series is compatible with existing ESL 320 Series
wiring. The 320A and the 350 Series models are identical except
the 350 Series provides battery backup and requires a 9-volt
Duracell battery for installation.
The 320A/350 Series smoke alarms cannot be used in
systems with control panels, pullstations, heat sensors,
elevator recall, fire door release, etc.
Depending on the model, the 320A/350 Series smoke alarms
provide the following features:
• Tandem interconnect capability. Allows up to 12 smoke
alarms to be connected together on one circuit.
• Self-diagnostics. Monitors its own sensitivity. If the unit
drifts out of the UL listed sensitivity range, the LED
flashes rapidly.
• Battery backup (350 Series). Offers up to 46 hours of
continuous protection in the event of a power outage.
• Base tamper. Discourages unauthorized removal of the
smoke alarm from the base.
Installation
The smoke alarm uses a mounting base for attaching to walls and
ceilings or directly to standard single-gang, 3-inch round or
4-inch octagonal electrical boxes. Contact a licensed electrictrian
to install permanent concealed wiring.
WARNING Turn off AC power to the electrical
wiring before mounting the alarm.
1. For 350 model alarms: Observing the correct polarity,
install a 9-volt Duracell battery into the battery compartment in the back of the alarm (Figure 1) and slide the
battery door closed.
2. If you are using the base tamper, use pliers to break off the
tip of the tab located on the back of the alarm (Figure 1).
When you use the base tamper, you must insert a screwdriver into a slot on the alarm to remove it from the base.
3. Using an NEC-approved method (see Wiring), attach the
connector assembly provided to the appropriate building
electric wiring (Figure 2).
4. Remove the backing from the adhesive strip (Figure 1) on
the back of the gasket.
5. Line up the straight edges of the gasket with the lines on the
back side of the mounting base and attach the gasket to the
mounting base.
Figure 1. Mounting the alarm
Figure 2. Wiring for tandem connections (maximum of 12)
Models:
320A / 350
black
white
Battery compartment
(350 models only)
SocketBase tamper tab
red
Connector
assembly
320ACC / 350CC
black
white
red
Mounting base Gasket
Models:
blue
orange
yellow
violet
violet
Form A relay
Adhesive strip Electrical box
Models:
320ACX / 350CX
black
white
red
blue
orange
yellow
violet
violet
Form A relay
Unswitched
120 VAC 60 Hz
power supply
Tandem bus
red
black (hot)
white (neutral)
Form C relay
Form C relay
To additional
smoke alarms
2
ESL 320A/350 Series Smoke Alarms
Installation Instructions
6. Insert the connector assembly through the center hole in the
mounting base and gasket (Figure 1) and attach the base to
the mounting surface.
7. Plug the connector assembly into the socket on the back of
the smoke alarm (Figure 1). For 350 Series units, you must
install the battery and close the battery cover before the
connector can be attached.
8. To attach the alarm to its mounting base, line up the arrow
on the mounting base with the tab on the alarm (Figure 3).
Insert the alarm into the base an turn clockwise approximately 15 degrees. It should snap firmly into place.
Figure 3. Arrow and tab alignment
Arrow
Tab
9. Apply AC power to the alarm.
10. To test the installation, press the test/silence button
(Figure 4) for approximately 1 second and release. The unit
should go into alarm, the LED should light steadily, and the
sounder should emit a temporal pattern. Testing of one
alarm will also cause alarms in tandem to sound. W e
recommend that you test each alarm individually.
11. Smoke-test the alarm. See Smoke test.
Figure 4. Alarm parts
T est silence button
Smoke alarm cover
Tab
Smoke chamber
LED
Clear plastic
cover
Wiring
Electrical wiring should be done by a licensed electrician. Use the
following guidelines when wiring the unit:
• Observe all applicable building code requirements.
Installation wiring shall conform with Article 76, Fire
Protective Signaling Systems, of the National Electrical
Code NFPA 70 1996 Edition. The tandem bus qualifies as a
power-limited circuit.
• Use 14 AWG cable or equivalent.
• Supply AC primary power either from a dedicated branch
circuit or the unswitched portion of a branch circuit also
used for power and lighting.
• When replacing a 320 Series alarm with a 320A/350 Series
alarm, use the existing connector.
• When replacing a 320ACX Series alarm, use the existing
320 Series connector and cap the white/red and white/blue
wires. Do not cap them together.
Single-station installation: Cap the red wire. Do not connect
it to any other circuit.
Tandem-station installation:
• Do not connect more than 12 alarms in a tandem circuit per
NFPA 72.
• Do not exceed 5,000 ft. (1524 m) for a tandem circuit.
• Use only 320 Series and 320A/350 Series alarms in tandem
connections.
Alarm test
The alarm power, sounder, and electronic module should be
tested monthly as follows:
Press the test/silence button (Figure 4) for approximately 1
second and release. The unit should go into alarm, the LED
should light steadily, and the sounder should emit a temporal
pattern.
If the alarm successfully goes into alarm, the unit has power and
the electronic module is functioning properly.
If the alarm fails the test, first check that power is present. If
power is present and it still fails, clean the alarm and replace the
smoke chamber. See Smoke chamber r eplacement.
Smoke test
T est smoke alarms in place annually using one of the following
methods:
• Use Smoke! in a can® (SM-200), a canned aerosol
simulated smoke and follow the directions on the can; or
• T est the alarm with smoke. Hold a smoldering punk or
cotton wick close to the smoke entry openings. Gently
direct smoke into the alarm for 20 seconds or until an alarm
is indicated.
Be sure to properly extinguish the smoke source after
testing! The alarm LED should light steadily and the sounder
should activate until the smoke clears or the text/silence button
(Figure 4) is pressed.
Slot
Slot