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Branch kit 1:3
Additional Refrigerant Amount
<Formula for Calculating Additional Refrigerant Amount>
Do not remove the refrigerant even if the additional refrigerant amount becomes minus result
as a result of calculations by the following formula and operate the air conditioner as it is.
Additional refrigerant amount (kg) = Main piping additional refrigerant amount (kg) +
α:
Additional refrigerant amount per meter of actual main piping length (kg)
γ:
Additional refrigerant amount per meter of actual branch piping length (kg)
L:
Actual length of main piping (m)
a, b, c: Actual length of branch piping (m)
DI 6HP
1. Be certain to write the additional refrigerant amount, pipe length (actual length), head
and other specification on the nameplate put on the outdoor unit for recording.
2. Seal the correct amount of additional refrigerant in the system.
9-EN
Indoor unit C
Branch pipe
c
Main pipe
Connecting pipe diameter
L
a
φ9.5
φ6.4
Indoor unit B
Branch pipe
b
Branch pipe
Distributor
L
Branch piping additional refrigerant amount (kg)
= {α× (L – 28)} + {γ × (a + b + c – 6)}
b
c
φ6.4
φ6.4
CAUTION
– 9 –
Installation Manual
Indoor unit A
a
Additional refrigerant amount per
Meter (kg/m)
α
β
0.04
-
H
γ
0.02
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