Installation manual
12
RXYSQ6TAV1B
VRV IV-S System air conditioner
4P482260-1 – 2017.03
Pipe siz
e selection
Ho
w to calculate the ad
ditional refrig
erant to be c
har
g
e
d
Additional refr
iger
ant to be charged R (kg)
R should be rounded off in units of 0.1 kg
Piping siz
e (outer diameter x minim
um
thic
kness)
Symbol
Gas pipe
Liquid pipe
Betw
een outdoor and first
refr
iger
ant br
anch kit
a
Ø19.1x1.0
Ø9.5x0.8
Betw
een refr
iger
ant br
anch kit and
refr
iger
ant br
anch kit
b
Ø15.9x1.0
Betw
een refr
iger
ant br
anch kit and
BP unit
c
, d, e
T
otal indoor
capacity Q
Gas pipe
Liquid pipe
Qc
, Qd, Qe
≤
5.0 kW
Ø12.7x0.8
Ø6.4x0.8
Qc
, Qd, Qe
>5.0 kW
Ø15.9x1.0
Ø9.5x0.8
NOTE
■
Qc
, Qd, Qe is total connected indoor capacity
.
■
c
, d, e indicates the symbols in the figure
.
Example
Indoor 4:
2.5 kW
}
Indoor 5:
3.5 kW
Qe=11.0 kW
Indoor 6:
5.0 kW
➡
(Gas pipe) Ø15.9x1.0 and (liquid pipe) Ø9.5x0.8
R=
(
T
otal length (m) of liquid
piping siz
e at Ø9.5
)
x0.054+
(
T
otal length (m) of liquid
piping siz
e at Ø6.4
)
x0.022
Example f
or refrig
erant branc
h using refnet joint
R=[40 x 0.054] + [78 x 0.022] = 3.876
⇒
3.9 kg
a:
Ø9.5x10 m
d
: Ø9.5x10 m
g
: Ø6.4x10 m
j: Ø6.4x10 m
m
: Ø6.4x8 m
b:
Ø9.5x10 m
e
: Ø9.5x10 m
h
: Ø6.4x10 m
k
: Ø6.4x5 m
c:
Ø6.4x10 m
f:
Ø6.4x10 m
i: Ø6.4x10 m
l: Ø6.4x5 m
4PEN482260-1.book Page 12 Monday, March 20, 2017 8:54 PM
