LG MULTI V IV ARUN072BTE4 - Page 115

117
Installation
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
REFRIGERANT PIPING DESIGN
Pipe Sizing for Heat Recovery Systems
Other Examples of Y-branch, Header and Heat Recovery Unit Connections
Examples of Improper Connections
Heat
Recovery
Unit 1
Y-branch
Pipe
48,000 Btu/h
Indoor
Unit
*Serial connection of Heat Recovery Units: Total capacity of indoor units ≤192,000 Btu/h.
*Maximum indoor units per Header branch is eight (8).
*
*
Header
Y-branch
Pipe
Heat
Recovery
Unit 2
Heat
Recovery
Unit 3
48,000 Btu/h
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
48,000 Btu/h 48,000 Btu/h 48,000 Btu/h 48,000 Btu/h
Heat
Recovery
Unit 1
Heat
Recovery
Unit 2
Indoor
Unit
Indoor
Unit
48,000 Btu/h
48,000 Btu/h
Y-branch
Pipe
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
12,000 Btu/h 12,000 Btu/h 12,000 Btu/h 12,000 Btu/h
24,000 Btu/h
24,000 Btu/h
Header
Heat
Recovery
Unit 1
Y-branch
Pipe
Indoor
Unit
Indoor
Unit
Indoor
Unit
Heat
Recovery
Unit 1
48,000 Btu/h
Indoor
Unit
Heat
Recovery
Unit 2
48,000 Btu/h
Indoor
Unit
Indoor
Unit
48,000 Btu/h 48,000 Btu/h
Indoor
Unit
Header
*Improper installation: Header branch pipe → heat recovery unit.
7,000 Btu/h7,000 Btu/h7,000 Btu/h
Indoor
Unit
Indoor
Unit
7,000 Btu/h 7,000 Btu/h
Y-branch
Pipe
Indoor
Unit
Indoor
Unit
24,000 Btu/h
24,000 Btu/h
*Improper installation: Heat recovery unit → Header branch pipe →
Y-branch and Header branch pipe.