MULTI/SINGLE CAC
4. Refrigerant piping system
10
Installation of Outdoor Units
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
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.
Liquid Pipe Diameter (mm) b (g/m)
Ø 6.35 35
Ø 9.52 40
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
L1
L2
L3
L4
L5
L6
H2
H1
Branch
Notes
L1 (m) : Main Piping Length (Outdoor Unit ~ Branching Kit)
L2~L5 (m) : Branch Piping Length (Branching Kit ~ Indoor Unit)
L6 (m) : Length Difference (the Nearest Indoor Unit ~ the farthest Indoor Unit)
H1 (m) : Height Difference (Outdoor Unit ~ Indoor Unit)
H2 (m) : Height Difference (Indoor Unit ~ Indoor Unit)
Refer to the specifications of Outdoor Unit for Maximum limit.
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