Hitachi ATW-RTU-02 Guia De Instalacion página 3

Installation and Operation Manual
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1. Installation Information
As these products communicate using RF technology special care must be taken during installation.
The location of the RF components as well as the building structure may influence performance of the
RF system. To assure system reliability, please review and apply the information given below.
Within a typical residential building the two products should communicate reliably within a 30m range.
It is important to take into consideration that walls and ceilings will reduce the RF signal. The strength
of the RF signal reaching the RF Receiver depends on the number of walls and ceilings separating it from the Room Unit, as well as the building construction - the diagram below illustrates an example of
typical signal strength reduction. Walls and ceilings reinforced with steel or plasterboard walls lined with
metal foil reduce the RF signal significantly more.
Once a position is selected for the Room Unit this can be checked using the RF Communication Test
mode as described in section 2.2.3 Locating the Room Unit on page 6. If the position is unsuitable the
RF Receiver will not respond and an alternative position for the Room Unit must be selected.
= Signal Strength
Wall Wall Wall
Ceiling
Max. Signal Length 30 metres
Typical example of Building Fabric Signal losses