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UNIT NOMENCLATURE
Water Source Units
ARW
Family
ARW = MULTI V Water V Water Source Unit (Refrigerant R410A)
Type
M = Inverter Heat Pump & Heat Recovery
Capacity (Mbh)
072 = 72
192 = 192
432 = 432
096 = 96
240 = 240
480 = 480
121 = 120
288, 289 = 288
576 = 576
144 = 144
336, 337 = 336
Electrical Ratings
C = 575V/60Hz/3Phase
Airflow Configuration
A = Not Applicable
T = Top Discharge
System Efficiency
E = High Efficiency
S = Standard Efficiency
Generation
5 = Fifth
For Heat Recovery Unit information, refer to the applicable Engineering Manual on
© LG Electronics Canada, Inc., North York, ON Canada. All rights reserved. "LG" is a registered trademark of LG Corp.
4 | INTRODUCTION
M
072
C
A
S
www.lgvrf.ca
LG Air Conditioner Technical Solution (LATS) Software
5
A properly designed and installed refrigerant piping system is critical to the optimal performance of LG air-conditioning systems. To assist
engineers, LG offers, free of charge, LG Air Conditioner Technical Solution (LATS) software—a total design solution for LG air conditioning
systems.
To reduce the risk of designing an improper applied system or one that will not operate correctly, LG requires that LATS software be used on all
projects.
Formats
LATS is available to LG customers in three user interfaces: LATS HVAC, LATS CAD2, and LATS REVIT. All three LATS formats are available
through an LG Sales Representative.
LATS HVAC is a Windows
®
-based application that aids engineers in designing LG Variable Refrigerant Flow (VRF), Multi F / Multi F MAX,
Single-Zone, and Energy Recovery Ventilator (ERV) systems.
*Windows
is a registered mark of Microsoft
®
LATS CAD2 combines the LG LATS program with AutoCAD
software**. It permits engineers to layout and validate LG Multi V
Variable Refrigerant Flow (VRF), Multi F / Multi F MAX, Single-Zone,
and Energy Recovery Ventilator (ERV) systems directly into CAD
drawings.
LATS Revit integrates the LG LATS program with Revit
It permits engineers to layout and validate Multi V VRF systems
directly into Revit drawings.
**AutoCAD
and Revit
are both registered marks of Autodesk, Inc.
®
®
Features
All LG product design criteria have been loaded into the program,
making LATS simple to use: double click or drag and drop the com-
ponent choices. Build systems in Tree Mode where the refrigerant
system can be viewed. Switch to a Schematic diagram to see the electrical and communications wiring.
LATS software permits the user to input region data, indoor and outdoor design temperatures, modify humidity default values, zoning, specify
type and size of outdoor units and indoor units, and input air flow and external static pressure (ESP) for ducted indoor units.
The program can also do the following:
• Import building loads from a separate Excel file.
• Present options for outdoor unit auto selection.
• Automatically calculate component capacity based on design
conditions for the chosen region.
• Verify if the height differences between the various system
components are within system limits.
• Provide the correct size of each refrigerant piping segment and LG
Y-Branches and Headers.
Features depend on which LATS program is being used, and the type of system being designed.
© LG Electronics Canada, Inc., North York, ON Canada. All rights reserved. "LG" is a registered trademark of LG Corp.
LG AIR CONDITIONER
TECHNICAL SOLUTION (LATS)
Corporation.
®
Figure 1: Example of LATS CAD2.
®
software**.
®
• Adjust overall piping system length when elbows are added.
• Check for component piping limitations and flag if any parameters
are broken.
• Factor operation and capacity for defrost operation.
• Calculate refrigerant charge, noting any additional trim charge.
• Suggest accessories for indoor units and outdoor units.
• Run system simulation.
INTRODUCTION | 5
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