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in a wall cavity, or if the prevailing air draughts carry the
smoke away. Installing smoke alarms on both sides of
closed doors and installing more than one smoke alarm as
recommended in this leaflet very significantly improve the
probability of early detection.
§The Smoke Alarm may not be heard.
§Radio link may not work due to interference or the signal
being blocked by furniture, renovations etc.
§A smoke alarm may not wake a person who has taken
drugs or alcohol.
§Smoke Alarms may not detect every type of fire to give suf-
ficient early warning. They are particularly ineffective with:
fires caused by smoking in bed, escaping gas, violent
explosions. poor storage of flammable rags and/or liquids,
(for example petrol, paint, spirits etc), overloaded electrical
circuits, arson, children playing with matches.
§Smoke Alarms don t last indefinitely. The manufacturer rec-
ommends replacement after 10 years as a precaution
§Use the Smoke Alarm Test Button to familiarise your family
with the Alarm sound and to practice fire drills regularly with
all family members. Draw up a floor plan that will show each
member at least 2 escape routes from each room in the
house. Children tend to hide when they don t know what to
do. Teach children how to escape, open windows, and use
roll up fire ladders and stools without adult help. Make sure
they know what to do if the alarm goes off.
9.2 Limitations of Radio Frequency Signals
Ei Electronics radio communication systems are very reliable
and are tested to high standards. However, due to their low
transmitting power and limited range (required by regulatory
bodies) there are some limitations to be considered:
(i) Receivers may be blocked by radio signals occurring on or
near their operating frequencies, regardless of the house
coding.
(ii) Radio transceiver equipment, such as the Ei405 or
Ei405TY, should be tested regularly at least weekly. This is
to determine, whether there are sources of interference
preventing communication, that the radio paths have not
been disrupted by moving furniture or renovations, and so
generally protect against these and other faults.
The Ei405 and Ei405TY Transceiver has been tested to EN
300 220-1 V1.3.1 (200-09) in accordance with the require-
ments of EN 300 220V1.1.1 (2000-09). These tests are
designed to provide reasonable protection against harmful
interference in residential installations. This equipment gen-
erates, uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions,