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7
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Installation
7.6.5 Charging additional refrigerant
To determine the additional refrigerant amount
Installer reference guide
52
Triple
L2
L3
L4
L1
(a) Assume that the longest line in the illustration corresponds with the actual longest
pipe, and the highest unit in the illustration corresponds with the actual highest
unit.
L1 Main piping
L2~L7 Branch piping
H1 Height difference between the highest indoor unit and the outdoor unit
H2 Height difference between the highest and the lowest indoor unit
Refrigerant branch kit
To determine if adding additional refrigerant is necessary
If
(L1+L2+L3+L4+L5+L6+L7)≤ chargeless
length
Chargeless length=
▪
10 m (size‑down)
▪
40 m (standard)
▪
15 m (size‑up)
(L1+L2+L3+L4+L5+L6+L7)> chargeless
length
INFORMATION
Piping length is the largest one-way length of liquid piping.
To determine the additional refrigerant amount (R in kg) (in case of pair)
L1:
40~50
R:
0.35
(a)
Only for RZAG100~140.
(b)
Only for RZAG71.
(a)
You do not have to add additional
refrigerant.
You must add additional refrigerant.
For future servicing, encircle the
selected amount in the tables below.
Standard liquid pipe size
L1 (m)
50~55
55~60
(a)
(a)
0.7
0.7
(b)
0.55
(a)
Double twin
L4
L2
L5
L6
L3
L7
L1
Then
60~70
70~80
(a)
(a)
1.05
1.4
Sky Air Alpha-series
4P695307-1A – 2024.02
80~85
(a)
1.55
RZAG71~140N
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