REYQ8~16M8W1B
VRVII System air conditioner
4PW23712-1
Installation manual
8
Pipe siz
e selection
F
or an outdoor unit m
ulti installation (REYQ18~48), mak
e
the
settings in accordance with the f
ollo
wing figure
.
A.
Piping between outdoor unit and refrigerant branc
h kit
•
Match to the siz
e of the connection piping on the outdoor unit.
Outdoor unit connection piping siz
e
Pipe siz
e when o
verall equiv
alent pipe length is 90 m or more
•W
hen o
v
er
all equiv
alent pipe length is 90
m or more
, the siz
e of the main
liquid pipe (outdoor unit branch sections) must be increased.
(Only main
liquid pipe!)
Main liquid pipe siz
e
B.
Piping between outdoor branc
hes
•
Choose from the f
ollo
wing tab
le in accordance with the total capacity of
all the outdoor units connected abov
e
this
.
Between tw
o immediatel
y adjacent refrig
erant branc
h kits and
BS unit
•
Choose from the f
ollo
wing tab
le in accordance with the total capacity of
all the indoor units connected below this
.
•
Do not let the connection piping e
xceed the refr
iger
ant piping siz
e
chosen b
y
gener
al system model name
.
C.
Piping between outdoor branc
h and outdoor unit
D.
Oil-equalizing line (Onl
y f
or REYQ18 or greater)
Between BS unit (refrig
erant branc
h kit) and indoor unit
•
Pipe siz
e f
or direct connection to indoor unit must be the same as the
connection siz
e of indoor unit.
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
Example f
or refrig
erant branc
h using refnet joint and refnet header f
or REYQ34
If the outdoor unit is REYQ34 and the piping lengths are as belo
w
R = [30x0.25]+[10x0.17]+[10x0.11]+[40x0.054]+[49x0.022]x1.15–6 = 9.569
⇒
R = 9.6 kg
A
B
C
D
Outdoor unit
capacity type
Piping siz
e (outer diameter)
Gas pipe
Liquid pipe
Suction
Disc
har
g
e
REYQ8
Ø9.5
Ø19.1
Ø15.9
REYQ10
Ø22.2
Ø19.1
REYQ12
Ø12.7
Ø28.6
16
Ø22.2
REYQ18
Ø15.9
REYQ20
+22
Ø28.6
REYQ24
Ø34.9
REYQ26~34
Ø19.1
REYQ36
Ø41.3
REYQ38~48
Ø34.9
Outdoor
capacity type
Piping siz
e (outer diameter)
Normal siz
e
Siz
e up
REYQ8+10
Ø9.5
Ø12.7
REYQ12~16
Ø12.7
Ø15.9
REYQ18~24
Ø15.9
Ø19.1
REYQ26~48
Ø19.1
Ø22.2
Outdoor
capacity inde
x
Piping siz
e (outer diameter)
Gas pipe
Liquid pipe
Suction
Disc
har
g
e
REYQ18
Ø15.9
Ø28.6
Ø22.2
22
Ø28.6
REYQ24
Ø34.9
REYQ26
Ø19.1
Indoor capacity
inde
x
Piping siz
e (outer diameter)
Gas pipe
Liquid pipe
Suction
Disc
har
g
e
<62.5
(*)
(*)
The BS unit (BSVQ100MV1) por
t and connection
pipe are diff
erent siz
es
. Use the reducing joints
included with the BS unit.
Ø6.4
Ø12.7
Ø9.5
62.5
≤
x
≤
200
Ø9.5
Ø15.9
Ø12.7
200
≤
x<290
Ø22.2
Ø19.1
290
≤
x<420
Ø12.7
Ø28.6
420
≤
x<640
Ø15.9
Ø28.6
640
≤
x<920
Ø19.1
Ø34.9
≥
920
Ø41.3
•W
hen tw
o pipes are connected between tw
o adjacent refr
iger
ant br
anch
kits
, select the proper gas pipe size based on data mentioned under
"suction gas pipe" column in the tab
le abo
v
e
.
Outdoor unit
capacity type
Piping siz
e (outer diameter)
Gas pipe
Liquid pipe
Suction
Disc
har
g
e
REYQ8
Ø9.5
Ø19.1
Ø15.9
REYQ10
Ø22.2
Ø19.1
REYQ12
Ø12.7
Ø28.6
16
Ø22.2
Piping siz
e
Ø6.4
Indoor
capacity inde
x
Piping siz
e (outer diameter)
Gas pipe
Liquid pipe
20, 25, 32,40, 50
(*)
(*)
The BS unit (BSVQ100MV1) por
t and connection
pipe are diff
erent siz
es
. Use the reducing joints
included with the BS unit.
Ø12.7
Ø6.4
63, 80, 100, 125
Ø15.9
Ø9.5
200
Ø19.1
250
Ø22.2
NOTE
If a negativ
e result is gotten f
or R from
the f
o
rm
ula at r
ight, no refr
iger
ant
needs to be added nor remo
v
ed.
R=
{
(
T
otal length (m) of liquid
piping siz
e at Ø22.2
)
x0.35+
(
T
otal length (m) of liquid
piping siz
e at Ø19.1
)
x0.25+
(
T
otal length (m) of liquid
piping siz
e at Ø15.9
)
x0.17+
(
T
otal length (m) of liquid
piping siz
e at Ø12.7
)
x0.11
+
(
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
}
x 1.15–
Model
Amount of refrig
erant
REYQ8~16
0 kg
REYQ18~32
3 kg
REYQ34~48
6 kg
a:
Ø19.1x30 m
d
: Ø9.5x10 m
g
: Ø6.4x10 m
j: Ø6.4x10 m
b:
Ø15.9x10 m
e
: Ø9.5x10 m
h
: Ø6.4x20 m
k
: Ø6.4x9 m
c:
Ø9.5x10 m
f:
Ø9.5x10 m
i: Ø12.7x10 m
