PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
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ENGLISH
The amount of Refrigerant
The calculation of the additional charge should take into account the length of pipe and CF(correc-
tion Factor) value of indoor unit.
Additional charge(kg) = Total liquid pipe : Ø25.4 mm x 0.480(kg/m)
+ Total liquid pipe : Ø22.2 mm x 0.354(kg/m)
+ Total liquid pipe : Ø19.05 mm x 0.266(kg/m)
+ Total liquid pipe : Ø15.88 mm x 0.173(kg/m)
+ Total liquid pipe : Ø12.7 mm x 0.118(kg/m)
+ Total liquid pipe : Ø9.52 mm x 0.061(kg/m)
+ Total liquid pipe : Ø6.35 mm x 0.022(kg/m)
+ CF value of indoor unit
Amount refrigerant of Indoor units
Example) 4Way Ceiling Cassette 14.5kW -1ea, Ceiling concealed Duct 7.3kW-2ea,
Wall Mounted 2.3kW-4ea
CF = 0.64 × 1 + 0.26 × 2 + 0.24 × 4 = 2.12 kg
Attach the additional refrigerant table of IDU.
CAUTION
Use only 2-series of indoor unit. Ex) ARNU***2
!
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