MULTI/SINGLE CAC
4. Refrigerant piping system
13
Installation of Outdoor Units
■ Multiple Piping type
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.
Refrigerant additional charge calculation method
Additional charge (g) = [(L1 + L2 + L3 + L4) – (A x CF1)] x a – (CF2 x 150)
L1~L4 (m) : Installed Piping Length (Outdoor Unit ~ Indoor Unit)
A (m) : Charge-less piping length
a (g/m) : Additional charging volume for Main Pipe (Outdoor Unit ~ Indoor Unit)
CF1 : Total number of connected indoor unit ÷ Max. number of connectable indoor unit
CF2 : Max. number of connectable indoor unit – Total number of connected 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.
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
L1
L2
L3
L4
H2
H1
Notes
L1~L4 (m) : Piping Length (Outdoor Unit ~ 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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