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Humidity
0 to 90 % without vapour condensation
Maximum altitude
2000 m
Degree of pollution
2
Storage conditions
Temperature
-25
°C to
+60
°C
Humidity
0 to 90 % without vapour condensation
3.
DESCRIPTION
OF
APPLICATION
The communication module is designed for external control of an outdoor compressor unit called LG Electronics
model range
“MULTI V **“
in applications where the unit serves as the source of cold/heat in HVAC systems.
The superior HVAC control system defines the operational mode and power requirements.
The communication module is installed in a plastic box including the necessary power supply. The delivered
system includes refrigerant temperature sensors installed at the input and output of the heat exchanger in the
HVAC equipment.
The module has an output for controlling a bipolar electronic expansion valve - model EX4--, EX5--, EX6--
(ALCO/Emmerson).
In an application where the compressor unit is used as a source of refrigeration, expansion valves with a one-
way refrigerant flow are used, i
.
e. EX4-M21, EX5-U21, EX6-M21.
In applications where the compressor unit is used as a heat source or as a source for several air handling
units/exchangers, it is necessary to use expansion valves with bidirectional flow, i
.
e. EX4-U31, EX5-U31, EX6-
M31.
The KM113.27UU module has 1 analogy input, 4 digital inputs, 2 digital outputs and 2 communication ports
(RS485) for controlling the compressor unit. The MODBUS input/output is intended for communication with the
superior I&C system. The “POWER“ output is intended for direct synchronous reduction of the compressor unit
output according to the current power requirement.
3.1 GUARANTEED COMPATIBILITY OF THE KM113.22MV2 MODULE WITH COMPR.
UNITS
Model range
Name of the outdoor unit
MULTI V 5
ARUM**LTE5
MULTI V S
ARUN**GSS0 ARUN**LSS0
MULTI V WATER IV
ARWN**LAS4
MULTI V WATER IV HEAT RECOVERY
ARWB**LAS4
MULTI V S WATER
ARWN**GA0
3.2 PERMITTED CAPACITY OF THE HEAT EXCHANGER IN THE HVAC EQUIPMENT
Cooling performance kW
Heat exchanger capacity kW
Expansion valve
kW
kBtu/h
Cooling mode
Heat pump mode
05
18
4.6
5.6
5.1
6.3
EX4-M21 / EX4-U31
07
24
5.7
8.2
6.4
9.2
EX4-M21 / EX4-U31
10
36
8.3
10.6
9.3
11.9
EX4-M21 / EX4-U31
12
42
10.7
12.3
12.0
13.8
EX4-M21 / EX4-U31
14
48
12.4
14.1
13.9
15.9
EX4-M21 / EX4-U31
