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Pipe connections between indoor and outdoor unit
The amount of Refrigerant
The calculation of the additional charge should take into account the length of pipe and CF(correction
Factor) value of indoor unit.
Additional charge(kg)
He
at recovery e i at
v nt l or( X
CAUTION
Use only 2-series of indoor unit. Ex) JRNU***2
42
Outdoor Unit
Total liquid pipe
=
:Ø25.4 mm
Total liquid pipe
+
:Ø22.2 mm
Total liquid pipe
+
:Ø19.05 mm
Total liquid pipe
+
:Ø15.88 mm
Total liquid pipe
+
:Ø12.7 mm
Total liquid pipe
+
:Ø9.52 mm
Total liquid pipe
+
:Ø6.35 mm
CF value of indoor unit
+
-
D )
-
-
-
0.20
0. 0 0.20
2
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
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