Installation - Connection To The Air-Conditioning System; Mechanical Installation; Connection Terminals Overview; Distribution Of Module Terminals (Fig. 3) - LG multi V ARUM Series Installation Manual

4. INSTALLATION – CONNECTION TO THE AIR-CONDITIONING SYSTEM

4.1 MECHANICAL INSTALLATION

The communication box is to be installed near to the heat exchanger in
the HVAC system – refrigerant temperature sensors and EEV module at
the exchanger in the HVAC system are connected to the module
(standard cable length of refrigerant temperature sensors on the
evaporator is 3 m, sensors with a length of 6 m - accessories on
request).
The plastic box allows the module to be installed in indoor or outdoor
environments providing that safety installation procedures are observed
(the box integrity is not compromised, suitable cable glands are used).
If the box is installed outdoor, it is necessary to protect the box from
direct UV radiation (shaded area). In this case, we recommend using a
box with increased UV resistance (KM113.22UU-UV).
Preparation:
Remove the front cover from the installation box – loosen the 4 threaded locks at the cover corners. Now you
may access the connection terminals of the communication module and the power supply source.
Have cable glands suitable for your intended application ready.
Attach the communication box to a suitable vertical plane (use the holes and covers at the rear of the box).

4.2 CONNECTION TERMINALS OVERVIEW

Connect a suitable power cable (e.g. CYKY-J 3x1.5) to the power supply terminals of the communication box –
auxiliary terminals 1, 2, 3 (terminal block X1, 230 VAC – "L, N, PE").
Connection terminals are divided into sections:
RS485 terminals (2x) directly on the communication module KM113.22
"POWER COM" terminals for connecting the output limitation module of the
outdoor compressor unit
"MODBUS COM" terminals for connecting MODBUS communication
Fig. 3 – Distribution of
terminals in the box
Separate external terminal block for power
connection
Terminal block directly on the communication module KM113.22
Left part – for connecting refrigerant temperature sensors to the heat
exchanger
Terminal block directly on the communication module KM113.22
Right part – for connecting inputs and outputs from external I&C system
Separate external terminal block X1 for connection of communication with external LG
compressor unit and EEV module
2020/07/23 page 7