Daikin Sky Air Alpha Series, Installation Manual, Page: 15 / 24

5 Installation
Installation manual
15
RZAG71~Y1
Sky Air Alpha-series
4P695306-1 – 2022.05
Triple
(a)
L2
L3
L4
H1
H2
L1
Double twin
(a)
H1
H2
L1
L2
L3
L4
L5
L6
L7
(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
5.4.5 Charging additional refrigerant
To determine the additional refrigerant amount
To determine if adding additional refrigerant is necessary
If Then
(L1+L2+L3+L4+L5+L6+L7)≤
chargeless length
Chargeless length=
▪ 10 m (size‑down)
▪ 40 m (standard)
▪ 15 m (size‑up)
You do not have to add
additional refrigerant.
(L1+L2+L3+L4+L5+L6+L7)>
chargeless length You must add additional
refrigerant.
For future servicing, encircle the
selected amount in the tables
below.
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)
Standard liquid pipe size
L1 (m)
L1: 40~50 50~55 55~60 60~70 70~80 80~85
R: 0.35 0.7
(a)
0.55
(b)
0.7
(a)
1.05
(a)
1.4
(a)
1.55
(a)
(a)
Only for RZAG100~140.
(b)
Only for RZAG71.
Size-up liquid pipe size
L1 (m)
L1: 15~20 20~25 25~30 30~35
R: 0.35 0.7 1.05
(a)
1.4
(a)
(a)
Only for RZAG100~140.
To determine the additional refrigerant amount (R in kg) (in
case of twin, triple and double twin)
1 Determine G1 and G2.
G1 (m) Total length of <x> liquid piping
x= Ø9.5 mm (standard)
x= Ø12.7 mm (size‑up)
G2 (m) Total length of Ø6.4 mm liquid piping
2 Determine R1 and R2.
If Then
G1>40 m
(a)
Use the table below to determine
R1 (length=
G1−40 m )
(a)
and R2
(length= G2 ).
G1≤40 m
(a)
(and G1+G2>40 m)
(a)
R1=0.0 kg.
Use the table below to determine
R2 (length=
G1+G2−40 m )
(a)
.
(a)
In case of size‑up: Replace 40 m by 15 m.
Standard liquid pipe size
Length (m)
0~10 10~15 15~20 20~30 30~40 40~45
R1: 0.35 0.7
(a)
0.55
(b)
0.7
(a)
1.05
(a)
1.4
(a)
1.55
(a)
R2: 0.2 0.4 0.4 0.6 0.8
(a)
1.0
(a)
(a)
Only for RZAG100~140.
(b)
Only for RZAG71.
Size‑up liquid pipe size
Length (m)
0~5 5~10 10~15 15~20 20~30 30~40 40~45
R1: 0.35 0.7 1.05
(a)
1.4
(a)
— — —
R2: 0.35 0.7
(a)
1.05
(a)
1.4
(a)
—
(a)
Only for RZAG100~140.
3 Determine the additional refrigerant amount: R=R1+R2.
Examples
Layout Additional refrigerant amount (R)
L2=7 m
(Ø6.4 mm)
L3=5 m
(Ø6.4 mm)
L1=45 m (Ø9.5 mm)
RZAG100
Case: Twin, standard liquid pipe size
1 G1 Total Ø9.5 => G1=45 m
G2 Total Ø6.4 => G2=7+5=12 m
2 Case: G1>40 m
R1 Length=G1−40 m=5 m
=> R1=0.35 kg
R2 Length=G2=12 m
=> R2=0.4 kg
3 R R=R1+R2=0.35+0.4=0.75 kg
L2=20 m
(Ø6.4 mm)
L3=17 m
(Ø6.4 mm)
L4=17 m
(Ø6.4 mm)
L1=15 m (Ø9.5 mm)
RZAG125
Case: Triple, standard liquid pipe size
1 G1 Total Ø9.5 => G1=15 m
G2 Total Ø6.4 => G2=20+17+17=54 m
2 Case: G1≤40 m (and G1+G2>40 m)
R1 R1=0.0 kg
R2 Length=G1+G2−40 m=15+54−40=2
9 m
=> R2=0.6 kg
3 R R=R1+R2=0.0+0.6=0.6 kg
Charging refrigerant: Setup
See "5.3.1 Checking refrigerant piping: Setup" [ 4 13].