Check Points During Installation - LG ACP 5 Installation Manual

Check points during the ACP
5 installation
• The number of PI485 connected to one RS-
485 communication line
ACP 5 provides 4 RS-485 ports for indoor
unit connection. (CH 1~4)
Up to 16 PI485 for outdoor unit can be con-
nected 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 5.
One ACP 5 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. To one RS-485 port, all of 256 indoor
units, which is the maximum number that
can be connected to the ACP 5, may be con-
nected. But, to improve the communication
performance of RS-485, it is recommended
to be divided and connected to 4 ports.
The maximum quantity of connected indoor
unit is different depending on the quantity of
connected I/O modules.
Please refer to following information related
to product connection quantity.
Quantity of
Device
256
128
* Devices: Indoor units, ERV, DI/DOs,
DOKITs, Heatings, AHUs
• RS-485 communication cable connection
There is a polarity in RS-485 communication
cable connection, so be careful not to
reverse the connection of the two cables.
Do not let the length of RS-485 communica-
tion cable exceed total of 1 km.
RS-485 communication cable must be con-
nected with BUS type.
• IP address of the ACP 5
IP address of the ACP 5, address of
Gateway, and Net mask must be requested
to the person in charge of the network of
the corresponding site.
!
RS-485 Connection of the ERV equipment
To connect ERV equipment, it is recom-
mended to use the ports other than RS-
485 communication ports which are con-
nected to air conditioners.
16
Quantity of I/O
Module
INSTALLING ACP 5
CAUTION
Quantity of
I/O Module
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
11
Quantity of
Device
256
248
240
232
224
216
208
200
192
184
176
168
160
152
144
136
128