14 | IntroduCtIon
MUL
TI V W
all-Mounted Indoor Unit Engineering Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©
LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
latS MultI v PIPIng
deSIgn SoFtWaRe
The proper design and installation of the refrigerant piping system
is a critical element of a Multi V system. Multi V Heat Pump systems
require two pipes between components – a liquid line and a vapor
line. Multi V Heat Recovery systems require three pipes between the
outdoor unit and the heat recovery unit – a liquid line, a low-pres-
sure vapor line, and a high-pressure vapor line. A properly designed
refrigerant piping system ensures that refrigerant is delivered to the
indoor unit coils for optimal system performance and capacity.
LG Air Conditioner Technical Solution (LATS) software is a total
design solution for LG Multi V air conditioning systems. This
Windows
®
-based application assists the design engineer with
specifying and sizing outdoor and indoor units (by calculating
component capacity based on design conditions), laying out the
refrigeration distribution pipe system, checking piping limitations,
calculating refrigerant charge, and generating equipment schedules
and piping diagrams in (.dxf) format for use on CAD building design
drawings.*
* Windows
®
is a registered mark of Microsoft
®
Corporation.
To ensure that the refrigerant piping design meets LG’s quality standards, a LATS refrigerant piping design must be provided with
every Multi V order. Following the installation, if any changes or variations to the design are necessary, a new LATS file must be
created and provided to LG prior to system commissioning to ensure the proper pipe size has not changed.
design choices
LATS Multi V software is flexible, offering the HVAC system engineer an easy to use Tree mode.
Tree Mode
Using the Tree mode, the engineer can quickly create a one-line schematic drawing of a Multi V system. Integration of the engineered pipe
system into the building drawings is done at a later date by the draftsperson using standard drafting software tools.
•
Import building loads from an external file (.xls format).
•
System components selected using an easy drag and drop process.
•
Automatically analyzes and checks the design complies with most
piping design limitations.
•
Sizes refrigerant piping.
•
Generates a system engineering report (.xls format).
•
Generates an equipment schedule (.xls or .dxf format).
•
Generates a system piping diagram (.dxf format).
latS Report
LATS Multi V software generates a report file (.xls format) containing
project design parameters, cooling and heating design day system
component performance, and capacity data. The report calculates
the system combination ratio, calculates the system refrigerant
charge, and provides detailed bill of material information including a
list of Multi V outdoor units, air handlers, control devices, accesso-
ries, refrigerant pipe sizes segregated by building, by system, by pipe
size, and by pipe segments.
Figure 1: Screenshot of LATS Pipe System Design Tool in Tree Mode.
