Replacing the Control Centre batteries will not affect the RF code setting. Pressing and holding the SYNC button on
the Receiver will however clear the RF address code saved into the internal memory, and switch the Receiver into
learning mode, as previously described.
TESTING THE RF TRANSMISSION
It is important to site both the Receiver and Control Centre in locations where the RF signal cannot be interrupted.
The receiving range between Control Centre and Receiver is 100 metres in open air, however many factors can
affect the RF transmission and shorten the operating distance, e.g. shielding by thick walls, foil back plasterboard,
metal objects such as filing cabinets, general RF interference, and so on.
The operating range is generally around 30 metres, which is large enough for most household applications, but it
is advisable to test the RF transmission from the intended Control Centre location to the Receiver location before
fixing the Control Centre to the wall. If you are unable to get a stable RF connection between the Receiver and
Control Centre, check that the Receiver is both switched on and has a mains supply (green LED lit).
The RF communication is one way, from the Control Centre to the Receiver – the Receiver does not send any signal
back to the Control Centre. The RF signal indicator only flashes once when a signal is being transmitted. Once
the Receiver has established communication successfully, the green Power LED will flash for 4 seconds to indicate
the process has completed correctly.
The Control Centre will transmit only when there is a need to control the heating system.
11ST620RF INSTRUCTION MANUAL
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