Daikin SkyAir RZQG140L7Y1B, Installation Manual

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4 Installation
Installation manual
8
RZQG71~Y1 + RZQSG100~Y1
Split system air conditioners
4P385521-1C – 2019.04
If the pressure… Then…
Does not change There is no moisture in the
system. This procedure is
finished.
Increases There is moisture in the
system. Go to the next step.
3 Vacuum the system for at least 2 hours to a manifold pressure
of −0.1 MPa (−1 bar).
4 After turning the pump OFF, check the pressure for at least
1 hour.
5 If you do NOT reach the target vacuum or CANNOT maintain
the vacuum for 1 hour, do the following:
▪ Check for leaks again.
▪ Perform vacuum drying again.
NOTICE
Make sure to open the stop valves after installing the
refrigerant piping and performing vacuum drying. Running
the system with the stop valves closed may break the
compressor.
4.4 Charging refrigerant
4.4.1 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
4.4.2 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)
▪ 30 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)
L1 (m)
L1 (standard): 30~40 m 40~50 m 50~60 m
(a)
60~75 m
(a)
L1 (size-up): 15~20 m 20~25 m 25~30 m
(a)
30~35 m
(a)
R: 0.5 kg 1.0 kg 1.5 kg 2.0 kg
(a) Only for RZQG100~140.
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>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 15 m.
In case of standard liquid pipe size:
Length
0~10 m 10~20 m 20~30 m
(a)
30~45 m
(a)
R1: 0.5 kg 1.0 kg 1.5 kg 2.0 kg
R2: 0.3 kg 0.6 kg 0.9 kg 1.2 kg
In case of size‑up liquid pipe size:
Length
0~5 m 5~10 m 10~15 m
(a)
15~20 m
(a)
R1, R2: 0.5 kg 1.0 kg 1.5 kg 2.0 kg
(a) Only for RZQG100~140.
3 Determine the additional refrigerant amount: R=R1+R2.