Daikin Sky Air Advance Series - Refrigerant Charging Precautions; Piping Length Definitions; Determining Additional Refrigerant Amount

6 Installation
Installer reference guide
21
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
WARNING
The refrigerant inside the unit is mildly flammable, but
normally does NOT leak. If the refrigerant leaks in the
room and comes in contact with fire from a burner, a
heater, or a cooker, this may result in fire, or the formation
of a harmful gas.
Turn off any combustible heating devices, ventilate the
room, and contact the dealer where you purchased the
unit.
Do NOT use the unit until a service person confirms that
the part from which the refrigerant leaked has been
repaired.
6.7.3 Precautions when charging refrigerant
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
6.7.4 Definitions: L1~L7, H1, H2
Pair
(a)
H1
L1
Twin
(a)
H1
H2
L1
L2
L3
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
6.7.5 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.
If Then
(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
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.