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
Material
Polyolefin Foam
UL94 Flame Classication
HF-1
Density
1.84 lbs./ft.
3
Thermal Conductivity
.0208 Btu/h/ft. ºR
Thickness
1/2 inch
Table 131:Fitting Properties.
Liquid and Gas
Pipe Joints
Y-Branch Kit Insulation
Insulation for
Field-Installed Piping
Field-Supplied Insulation Tape
CUT SHEET
Y-Branch Kit
Model Y-Branch Type
Port Identier (inch)
1 2 3
PMBL5620
Liquid Ø3/8 Ø3/8 Ø3/8
Vapor Ø3/4 Ø3/4 Ø3/4
Y-Branch Type
Dimensions (inch)
X Y
Liquid 13.80 3.24
Vapor 12.48 3.02
• LG Y-Branch Kit PMBL5620 is required when installing two branch
distribution units in parallel on one LG Multi F MAX system.
• The kit must be properly installed following instructions in the appli-
cable LG manual. Field-supplied branch fittings are not permitted.
• Kit components must be kept free of debris and be dry before
installation.
• All Y-Branch Kits include a clam shell, peel-and-stick insulation
jacket.
Table 132: Multi F MAX Y-Branch Connection Diameters.
Material
Copper
Design Pressure
551 psig
Table 133: Insulation Jacket Properties.
A
B
X
Y
1
2
3
A = To Outdoor Unit
B = To Branch Distribution Unit
1
2
3
Figure 297:Y-Branch Port Identier Diagram.
Figure 298:Y-Branch Dimensions Diagram.
Figure 299:Y-Branch Insulation Jacket Diagram.
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 | 211
Refrigerant Piping Design and Best Practices
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