Instruction manual

8. Limitations of Radio Communications
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) Radio equipment, such as the Ei450 controller, should be tested regularly - at least weekly. This
is to determine whether there are sources of interference preventing communication. The radio paths
may be disrupted by moving furniture or renovations, and so regular testing will help identify these and
other faults, so that they can be rectified (see Section 5).
(ii) Receivers may be blocked by radio signals occurring on or near their operating frequencies,
regardless of the House Coding. The Ei450 i-controller has been tested to EN 300 220-1 V1.3.1
(2000-09) in accordance with the requirements of EN 300 220V1.1.1 (2000-09). These tests are
designed to provide reasonable protection against harmful interference in residential installations. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause interference to radio and/or television reception.
However, there is no guarantee that interference will not occur in a particular installation. If the Ei450
controller does cause such interference, it can be verified by turning it on and off.
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