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Optical Ei186
Sensor: Detects light scattered by smoke.
Sensitivity: Complies with BS5446: Part 1: 2000.
Ambient Light: Chamber design and electronic compensation
overcomes problems with stray light.
Combined Test/Hush Button: Tests and then hushes unit
for 10 minutes. Automatically resets.
Red LED flashes
every 10 seconds while in hush.
Airspeed: No effect.
Insect Screen: Prevents insects and debris entering the
chamber.
Automatic Self Test: Chamber is tested every 40 seconds
and unit beeps if it is degraded (without red light flashing at
same time).
Dimensions: 145mm (d) x 60mm (h). Weight: 380 grams.
Heat Ei184
Sensor: Fast response Thermistor.
o
Sensitivity: 58 +/- 4
C (Response grade 1 as defined in
EN54: Part5).
Combined Test/Hush Button: Tests and then hushes unit
for 10 minutes. Automatically resets. Red LED flashes
every 10 seconds while in hush. At the end of the hush
period unit gives a double beep.
Airspeed: No effect.
Contamination: Much less affected by insects and
contamination than Smoke Alarms.
Dimensions: 145mm (d) x 65mm (h). Weight: 380 grams.
TROUBLESHOOTING
1. FREQUENT NUISANCE ALARMS OCCUR:
(1) Close kitchen / bathroom door when in use.
(2) Ensure that the alarm is sited at least 6m away from
sources of fumes.
(3) Contamination from insects, paint or paint fumes may
have occurred. Clean the alarm as described in this
booklet.
(4) If the problem persists, resiting of the unit should be
considered. Alternatively, replace the unit with an Optical
unit (Ei186/185), assuming that the problem is with an
Ionisation type alarm (Ei181/180).
2. ALARM SOUNDS FOR NO APPARENT REASON:
(1) Identify the alarm source. On interconnected units, the
red light on the cover will flash rapidly only on the unit which
is the source of the alarm.
(2) Check for fumes, steam etc. from the kitchen or
bathroom. Paint and other fumes can cause nuisance
alarms.
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