Daikin Sky Air Advance Series, Installation Manual

Page: 11 / 20

4 Installation
Installation manual
11
250D7Y1B
Sky Air Advance-series
4P573384-1 – 2019.04
H2 Height difference between the highest and the lowest
indoor unit
Refrigerant branch kit
4.4.5 Charging additional refrigerant
To determine the additional refrigerant amount
To determine if adding additional refrigerant is necessary
Chargeless length
Ø standard 30 m
Ø size-up of gas piping 30 m
Ø size-up of liquid piping 20 m
If Then
(L1+L2+L3+L4+L5+L6+L7)≤
chargeless length 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 piping size:
Standard piping size
L1 (m)
L1: 30~40 40~50 50~60 60~70 70~80 80~90 90~100
R: 0.45 0.9 1.35 1.8 2.25 2.7 3.15
Size-up piping size:
Size-up piping size
L1 (m)
L1: 20~25 25~30 30~35 35~40 40~45 40~45
R: 0.35 0.7 1.05 1.4 1.75 2.1
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>30 m
(a)
Use the table below to determine
R1 (length=
G1−30 m )
(a)
and R2
(length= G2 ).
G1≤30 m
(a)
(and G1+G2>30 m)
(a)
R1=0.0 kg.
Use the table below to determine
R2 (length=
G1+G2−30 m )
(a)
.
(a) In case of size‑up: replace 30 m by 20 m.
Standard liquid pipe size
Length (m)
0~10 10~20 20~30 30~40 40~50 50~60 60~70
R1: 0.45 0.9 1.35 1.8 2.25 2.7 3.15
Standard liquid pipe size
Length (m)
0~10 10~20 20~30 30~40 40~50 50~60 60~70
R2: 0.2 0.4 0.6 0.8 1 1.2 1.4
Size‑up liquid pipe size
Length (m)
0~5 5~10 10~15 15~20 20~25 25~30
R1: 0.35 0.7 1.05 1.1 1.75 2.1
R2: 0.18 0.35 0.53 0.7 0.88 1.05
3 Determine the additional refrigerant amount: R=R1+R2.
Examples
Layout Additional refrigerant amount (R)
L2=7 m
(Ø9.5 mm)
L3=5 m
(Ø9.5 mm)
L1=35 m (Ø9.5 mm)
RZA200
Case: Twin, standard liquid pipe size
1 G1 Total Ø9.5 => G1=35+7+5=47 m
G2 Total Ø6.4 => G2=0 m
2 Case: G1>30 m
R1 Length=G1–30 m=47–30 m=17 m
=> R1=0.9 kg
R2 Length=G2=0 m
=> R2=0 kg
3 R R=R1+R2=0.9+0=0.9 kg
L2=17 m
(Ø6.4 mm)
L3=17 m
(Ø6.4 mm)
L4=10 m
(Ø6.4 mm)
L1=5 m (Ø9.5 mm)
RZA200
Case: Triple, standard liquid pipe size
1 G1 Total Ø9.5 => G1=5 m
G2 Total Ø6.4 => G2=10+17+17=44 m
2 Case: G1≤30 m (and G1+G2>30 m)
R1 R1=0.0 kg
R2 Length=G1+G2–30=5+44–30=19 m
=> R2=0.4 kg
3 R R=R1+R2=0.0+0.4=0.4 kg
Charging refrigerant: Setup
See "4.3.1 Checking refrigerant piping: Setup" [
4
9].
To charge additional refrigerant
WARNING
▪ Only use R32 as refrigerant. Other substances may
cause explosions and accidents.
▪ R32 contains fluorinated greenhouse gases. Its global
warming potential (GWP) value is 675. Do NOT vent
these gases into the atmosphere.
▪ When charging refrigerant, ALWAYS use protective
gloves and safety glasses.
Prerequisite: Before charging refrigerant, make sure the refrigerant
piping is connected and checked (leak test and vacuum drying).
1 Connect the refrigerant cylinder to both the service port of the
gas stop valve and the service port of the liquid stop valve.
2 Charge the additional refrigerant amount.
3 Open the stop valves.
4.4.6 Completely recharging refrigerant
To determine the complete recharge amount
For the complete charging amount refer to the additional refrigerant
charge sticker mounted on the unit.