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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)
Amount refrigerant of Indoor units
Example) 4Way Ceiling Cassette 14.5kW -1ea, Ceiling concealed Duct w7.3kW-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
!
Do not connect 0 or 1 series of indoor unit. ex)ARNU****0(X) , ARNU****1(X)
PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
=
Total liquid pipe : Ø9.52 mm
+
Total liquid pipe : Ø6.35 mm
+
CF value of indoor unit
37
x 0.061(kg/m)
x 0.022(kg/m)
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