Engineering Manual
Table Of Contents
- Convergence of Technology, Innovation, Flexibility, & Style
- Unit Nomenclature
- Outdoor Unit Overview
- Indoor Unit Overview
- Controls and Options Overview
- Art Cool Mirror Indoor Units
- General Data / Specifications
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- Acoustic Data
- Air Velocity and Temperature Distribution
- Refrigerant Flow Diagram
- Wiring Diagram
- Factory Supplied Parts and Materials
- Installation and Best Layout Practices
- Art Cool Gallery Indoor Units
- General Data / Specifications
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- Acoustic Data
- Air Velocity and Temperature Distribution
- Refrigerant Flow Diagram
- Wiring Diagram
- Factory Supplied Parts and Materials
- Installation and Best Layout Practices
- Standard Wall-Mounted Indoor Units
- General Data / Specifications
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- Acoustic Data
- Air Velocity and Temperature Distribution
- Refrigerant Flow Diagram
- Wiring Diagram
- Factory Supplied Parts and Materials
- Installation and Best Layout Practices
- Duct (Low Static) Indoor Units
- General Data / Specifications
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- External Static Pressure
- Acoustic Data
- Refrigerant Flow Diagrams
- Wiring Diagram
- Factory Supplied Parts and Materials
- Installation and Best Layout Practices
- Duct (High Static) Indoor Units
- General Data / Specifications
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- External Static Pressure / Acoustic Data
- Refrigerant Flow Diagrams
- Wiring Diagrams
- Factory Supplied Parts and Materials / Installation
- Installation and Best Layout Practices
- Four-Way Ceiling Cassette Indoor Units
- General Data / Specifications
- Dimensions
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- Acoustic Data
- Air Velocity and Temperature Distribution
- Refrigerant Flow Diagram
- Wiring Diagram
- Factory Supplied Parts and Materials
- Installation and Best Layout Practices
- Vertical-Horizontal Indoor Units
- General Data / Specifications
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- External Static Pressure
- Acoustic Data
- Refrigerant Flow Diagram
- Wiring Diagram
- Factory Supplied Parts and Materials
- Installation and Best Layout Practices
- Equipment Selection Procedure
- Building Ventilation Design Guide
- Placement Considerations
- Refrigerant Piping Design
- Design Guideline Summary
- Creating a Balanced System / Manual Layout Procedure
- LG Engineered Multi F MAX Y-Branch Kit
- Refrigerant Charge
- Installation & Layout Best Practices
- Refrigerant Piping System Layout
- Piping Insulation
- Condensate Drain Piping
- Y-Branch Kit
- Wiring Connections
- Power Wiring (208-230V) and Communications Cable Details
- Indoor Unit Group Control
- Acronyms
INSTALLATION & LAYOUT BEST PRACTICES
Condensate Drain Piping
Outdoor Units
Outdoor unit requires condensate drain piping. Condensate drain pipe is constructed with materials approved by local code. See “Placement
Considerations” on page 185 to page 190 for information on outdoor unit placement and condensate drainage.
Condensate Drain Piping
Indoor Units
All indoor units generate water during cooling operation, therefore, how to properly handle this condensation must be considered. Some
indoor units include factory-installed drain pumps; others apply the gravity drain method.
Depending on the location of the indoor unit, condensation can be drained directly to the outside of the building, or a common indoor unit
drainage piping system can be installed, both incorporating PVC piping.
Indoor Unit Drain Type Drain Pipe Diameter (OD / ID, in.)
Drain Amount
(gal. / min. at 0.033 ft. height)
Art Cool Wall-Mounted Gravity 13/16 / 5/8 —
Art Cool Gallery Gravity 13/16 / 5/8 —
Standard Wall-Mounted Gravity 13/16 / 5/8 —
Ceiling-Concealed Ducted
(Low Static and High Static)
27-1/2 in. Lift Drain Pump,
Factory Installed
Ø1-1/4 / Ø1 0.105
Four-Way Ceiling Cassette
27-1/2 in. Lift Drain Pump,
Factory Installed
Ø1-1/4 / Ø1 0.105
Vertical-Horizontal Air Handling Unit Gravity Ø3/4 / — —
Table 130:Indoor Unit Drain Piping Specications.
Ensure the indoor unit, refrigerant piping, power wiring / communication cables, and drain piping is properly supported with anchor bolts and
clamp hangers positioned at 3.3 to 4.9 foot intervals.
Flexible hose
Drain pump
PVC elbow
PVC
PVC
1/50~1/100 slope
≤Max. 27-1/2 in.
≤11-13/16 in.
Metal clamp
Drain pan
Insulation
Flexible drain hose
Insulation
Figure 291:Diagram of an Indoor Unit with a Gravity Drain. Figure 292:Diagram of an Indoor Unit with a Drain Pump.
Drainage Gradient
The gradient for drain piping should be at least 1/50 to 1/100.
Ensure any holes through ceilings, walls, etc., are large enough to
accommodate both the drain piping and any insulation.
Indoor unit
Gradient of at least 1/50~1/100
Figure 293:Flexible Drain Hose
Connection.
Clamp the Flexible Drain Hose Connection
Flexible Drain Hose
Some indoor units include a
factory-provided flexible drain
pipe for installation.
• Install the flexible drain pipe
as straight as possible; sharp
angles may cause the pipe
to deteriorate and may crack
over time.
• Connect the flexible drain pipe
with a round clamp. If the flex-
ible drain pipe is not installed
properly, water will leak from
the connection.
• Do not include a reverse slope
in the drain connection.
Figure 294:Drain Piping Gradient Recommendation.
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
DESIGN & PRACTICES | 209
Refrigerant Piping Design and Best Practices
MULTI
F
MAX
MULTI
F