Refrigerant Piping System - LG AUUW09GA0 Engineering Product Data Book

MULTI/SINGLE CAC

4. Refrigerant piping system

Single type - Synchro
CAUTION
• Please check the product type. Piping installation and refrigerant charge varies depending on the type of
product.
For more information, please refer to the installation manual.
• When installing the branch pipe, direction and angle of installation is not limited.
• Take care so that burrs and foreign material may not enter into the cutting surface when connecting.
• Connect remaining those by cutting or direct insertion to the diameter of pipe.
 Refrigerant additional charge calculation method
Liquid Pipe Diameter (mm)
Additional Refrigerant = (L1 - A) x a + (L2 + L3 + L4 + L5) x b
L1 (m) : Installed Branch Piping Length (Outdoor Unit ~ Branching Kit)
L2~L5 (m) : Installed Branch Piping Length (Branching Kit ~ Indoor Unit)
a (g/m) : Additional charging volume for Main Pipe (Outdoor Unit ~ Branching Kit)
b (g/m) : Additional charging volume for Branch Pipe (Branching Kit ~ Indoor Unit)
* Refer to the specifications for detail information of A, a.
* If total additional charge value after calculation comes out to be negative, then do not consider additional charge.
CAUTION
• Capacity is based on standard length and maximum allowance length is on the basis of reliability.
• Improper refrigerant charge may result in abnormal cycle.
10
L2
Indoor Unit
L3
L4
Indoor Unit
L5
Branch
L1
Notes
L1 (m)
L2~L5 (m) : Branch Piping Length (Branching Kit ~ Indoor Unit)
L6 (m)
H1 (m)
H2 (m)
Refer to the specifications of Outdoor Unit for Maximum limit.
Ø 6.35
Ø 9.52
Indoor Unit
Indoor Unit
L6
: Main Piping Length (Outdoor Unit ~ Branching Kit)
: Length Difference (the Nearest Indoor Unit ~ the farthest Indoor Unit)
: Height Difference (Outdoor Unit ~ Indoor Unit)
: Height Difference (Indoor Unit ~ Indoor Unit)
Installation of Outdoor Units
b (g/m)
35
40