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Installation of Outside Unit
4. Refrigerant Piping System
4.9 Calculation of amount of refrigerant
• The calculation of the additional charge should take into account the length of pipe and CF(correction Factor) value of
indoor units.
• Please refer to the indoor unit's PDB or the outdoor/outside unit's installation manual for the additional refrigerant table of
indoor units.
Additional charge (kg)
= Total length (m) of Liquid pipe : Ø25.4 mm (1 inch)
+ Total length (m) of Liquid pipe : Ø22.2 mm (7/8 inch)
+ Total length (m) of Liquid pipe : Ø19.05 mm (3/4 inch)
+ Total length (m) of Liquid pipe : Ø15.88 mm (5/8 inch)
+ Total length (m) of Liquid pipe : Ø12.7 mm (1/2 inch)
+ Total length (m) of Liquid pipe : Ø9.52 mm (3/8 inch)
+ Total length (m) of Liquid pipe : Ø6.35 mm (1/4 inch)
+ Number of installed HR units(2,3,4 port)
+ Number of installed HR units(6,8 port)
+ CF value of indoor unit(kg/EA)
16
Installation
x
0.480 (kg/m)
x
0.354 (kg/m)
x
0.266 (kg/m)
x
0.173 (kg/m)
x
0.118 (kg/m)
x
0.061 (kg/m)
x
0.022 (kg/m)
x
0.500 (kg/m)*
x
1.000 (kg/m)*
* : For Heat Recovery System Only
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