Check Points During The Acp Iv Installation - LG PACP4B000 Installation & User Manual

8 Installing ACP IV
CAUTION
Installing the ACP IV
The ACP IV installation work needs the professional technique. Therefore, the installation
y
described in this chapter should be performed by the certified installation professional.
Consult the service center or the professional installation agency certified by us about any
y
question or request related to the installation.

Check points during the ACP IV installation

• The number of PI485 connected to one RS-485 communication line
ACP IV provides 4 RS-485 ports for indoor unit connection. (CH 1~4)
Up to 16 PI485 for outdoor unit can be connected to one RS-485 port, and up to 31 PI485 for
SINGLE/ERV can be connected.
• The number of the indoor units that can be connected to one ACP IV
One ACP IV can be connected up to 256 indoor units. With ACS I/O interlocking, you can
connect 128 indoor units and 16 I/O modules. And with chiller interlocking, you can connect
128 indoor units and 10 chiller units.
But, to improve the communication performance of RS-485, it is recommended to be divided
and connected to 4 ports.
To one RS-485 port, all of 256 indoor units, which is the maximum number that can be
connected to the ACP IV, may be connected.