Page 20 - Fan Coil Unit

FAN COIL UNIT / AIR CONDITIONING

RF Wireless Communication

Radio Frequency Communication

Wireless communication using ISM bands that do not require communication lines

>> Features of RF wireless communication

01 No communication line required for FCU control

① When controlling fan coil units (FCU) individually or as a group, wired RS485 communication requires
the connection of communication lines to the products. However, RF wireless communication does not
require the connection of communication lines.
② No wiring work is needed, reducing the need for checking communication line issues such as wiring
error, disconnection, or poor contact, which shortens commissioning time.

02 Long-distance wireless communication with minimal communication interference

① The use of low-frequency ISM bands allows for communication distances of up to 2 km (in open areas),
with minimal impact from building structures. This enables communication over significant distances
even within buildings, allowing for the control of remote FCUs.
② Internal communication operates in the 447 MHz band, while central control communication operates in
the 424 MHz band. Each band uses 11 channels, minimizing mutual interference.
③ Unique algorithms are applied to minimize interference on the same frequency in close proximity,
ensuring that controlling multiple FCUs within a short range does not lead to interference.

03 Compatibility with existing FCUs

① The RF modem can be used by connecting to the internal or external communication terminal of the
existing FCU. The ID is read and used from the FCU, and there is no need to set the ID again.
② The RF modem can be used by connecting to the RS485 communication terminal of the existing gateway.
③ The RF remote control is capable of two-way communication and has all the functions of a conventional
wired remote control. It can be powered permanently using the power terminal, eliminating the
limitations and inconveniences associated with battery usage (such as limited usage time and frequent
battery replacement).

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