3
1
10
• VRV Systems • Outdoor Units
76
• Outdoor Units • VRV HEAT PUMP • RXYHQ12-36P(8)
10
Installation
10 - 3 Refrigerant pipe selection
RXYQ-P8
RXYQ-P(8)
RXYHQ-P8
4PW48461-1
Pipe
si
ze s
e
le
ct
ion
Fo
r an
ou
td
oo
r u
n
it mu
lti in
st
al
latio
n
(R
X
Y
Q2
0~
54
P +
R
XYH
Q1
6~
36
),
sel
ect
the
pi
pe
size in
acco
rd
an
ce with
th
e fo
llo
wing
figure
.
A,B,C. P
iping betwe
en out
door unit and r
e
friger
ant branc
h kit
•
C
hoose fr
om
the fol
lo
wing t
abl
e
in
accor
dance wi
th the out
door
un
it
tot
al
cap
ac
it
y typ
e, connec
ted downst
ream.
Out
door uni
t connect
ion pip
ing siz
e
D.
Piping be
tw
ee
n
refrige
rant bra
n
c
h ki
ts
•
C
hoos
e f
rom t
he
fol
lo
w
ing
table
i
n
acc
ordan
ce wi
th
th
e t
o
ta
l
cap
ac
it
y o
f
al
l t
he i
ndoo
r
unit
s
conn
ecte
d bel
ow
thi
s.
•
D
o not l
e
t th
e
con
nect
ion pi
pin
g
ex
ceed the ref
riger
ant
pi
pi
ng
s
iz
e
ch
osen
by g
eneral
syst
em model
n
a
m
e
.
E. P
iping betwe
en re
frigera
nt branc
h kit a
nd indoor
un
it
•
P
ipe si
ze for
di
re
ct conne
cti
on to i
ndoor uni
t must
be the
s
a
m
e
as t
he
co
nnect
ion si
ze of i
ndoor
uni
t.
W
hen
th
e e
q
u
iv
a
len
t pip
e le
ngt
h b
e
twe
en
ou
td
oor a
n
d
ind
oor u
n
it
s is 90
m or more
, th
e size
of
the
main
pipe
s (bo
th g
a
s s
id
e
a
n
d
liquid
side
) mu
st be
incre
ased
.
Dep
en
ding
on
th
e len
gth
o
f th
e p
iping
, th
e ca
p
a
city ma
y drop
, b
u
t e
v
en
in su
ch
a ca
se it
is
poss
ib
le to
increa
se
the
size o
f th
e
m
a
in
pi
pe
s
.
How to c
a
lc
ula
te
the
a
dditiona
l re
frigera
nt to
be c
h
arge
d
Ad
di
ti
on
al
r
e
fr
ig
er
an
t to
be
cha
rg
ed
R
(
k
g)
R
sho
ul
d
be
ro
un
de
d o
ff i
n
uni
ts
o
f 0.
1 kg
Ex
ample
for
re
frige
ra
nt
branc
h us
ing re
fne
t joint
and
re
fne
t he
ade
r
fo
r
R
X
Y
Q
34
P
(
(1x
16
) + (1
x
1
8
))
If th
e ou
td
oo
r u
n
it
is
R
X
Y
Q
34
P a
n
d t
h
e p
ipi
ng
le
ng
th
s ar
e
as b
e
low
N
ote
1
Al
lo
w
a
b
le l
e
ngt
h a
ft
e
r th
e fi
rs
t r
e
fri
g
e
ra
n
t b
ra
n
ch
ki
t to
i
n
d
oor
u
n
it
s i
s
40
m
or
l
e
ss, ho
w
e
ve
r
it
can
be
ext
en
ded
up
to
90
m
i
f al
l t
h
e fo
llo
wing
con
d
ition
s are
fulfil
led
.
Require
d conditions
E
x
a
m
ple drawi
n
g
s
It is ne
cessa
ry to incr
ea
se
th
e
pip
e
size
of
th
e liq
u
id and
th
e ga
s pip
e
if
th
e p
ipe
leng
th
be
twee
n t
h
e
fir
s
t a
n
d
th
e f
in
a
l
br
an
ch k
it
is ove
r
40
m
(r
e
duce
rs
m
u
st b
e
p
rocur
e
d
o
n
site
).
If t
h
e
i
n
cr
ea
sed
pi
pe
si
ze
is
la
rger
t
han
th
e p
ipe
si
ze o
f th
e m
a
in
pi
p
e
,
the
n t
he
pi
pe
si
ze o
f t
h
e
ma
in
p
ip
e
nee
ds
to b
e
increa
sed
as we
ll.
in
do
or
un
it
8
:
b
+
c
+d
+e
+f
+g
+p
90
m
in
cr
e
a
se
th
e p
ipe
si
ze
o
f b
, c,
d, e
, f
, g
Incre
a
se
the
pip
e size
as
follows
* If
ava
ila
ble
on
the
site.
Oth
erwise it ca
n
not
be
increa
sed
.
For
cal
cul
a
ti
on o
f tot
al
ext
ensi
o
n
l
eng
th
,
th
e
a
c
tua
l
le
ngt
h of a
b
o
v
e pi
pe
s mu
st be
d
o
u
b
le
d
. (e
xcep
t ma
in
pi
pe
an
d the
pipe
s th
at
no
t incr
ea
se t
h
e
pipe
size)
a
+
b*2
+c*2
+d
*2+
e*2
+
f*2+
g*2
+h+
i+j
+k+l+
m+n
+
p
10
00
m
Ind
oo
r
un
it
to
the
ne
ar
est
br
an
ch ki
t
40
m
h
, i,
j.
.....
. p
40
m
Th
e d
if
fere
n
c
e be
tw
ee
n t
h
e
dis
tan
c
e o
f t
h
e
ou
td
oo
r un
it
t
o
t
h
e f
a
rt
h
e
s
t in
do
or
u
n
it
an
d
t
h
e di
stan
c
e
o
f
th
e
ou
td
oo
r un
it
to
the
ne
ar
est
i
n
d
oor
u
n
it
40
m
Th
e f
a
rt
he
st i
n
doo
r un
it
8
The
ne
ar
es
t ind
o
or u
n
it
1
(a
+
b
+
c+
d+
e+
f+
g+
p)
–
(a
+
h
)
40
m
N
ote
2
If t
h
e
pi
pe
si
ze
abo
ve
the
r
e
fn
et h
e
a
d
e
r
is
Ø34
.9
or
m
o
re
,
KH
R
Q
22
M7
5H
i
s
r
e
qui
re
d
.
B
A
C
DE
B
B
Out
door
uni
t
ca
p
aci
ty
t
y
pe
Pipi
ng
si
ze (out
er di
am
et
er)
(
m
m
)
Gas pi
pe
Li
quid pip
e
RX(
Y)Q5
Ø15.
9
Ø9.5
RX(
Y)Q8
Ø19.
1
RX(
Y)Q10
Ø22.
2
RX(
Y)
Q
12~
16 +
RXY
HQ1
2
+1
6
Ø28.
6
Ø
12.
7
RX(
Y)Q18 +
22 +
RXYHQ18~
22
Ø
15.
9
R
XY(H
)Q
24
Ø34.
9
RXY(
H)Q26~
34
Ø
19.
1
RXYQ36~
54 +
RXYHQ36
Ø41.
3
In
door or out
door unit
tot
a
l ca
p
a
ci
ty
Piping
size
(ou
te
r dia
meter) (mm)
G
a
s
pipe
Liquid pipe
15
0
Ø
1
5
.9
Ø9.
5
15
0
x
20
0
Ø
1
9
.1
20
0
x
29
0
Ø
2
2
.2
29
0
x
42
0
Ø28
.6
Ø12
.7
42
0
x
64
0
Ø
1
5
.9
64
0
x
92
0
Ø
3
4
.9
Ø19
.1
92
0
Ø
4
1
.3
Indoor c
a
p
a
c
ity
ty
pe
P
iping s
ize (outer
diam
et
er)
(
mm)
G
a
s
pipe
Liquid pipe
20
~5
0
Ø
12
.7
Ø6.
4
63
~1
25
Ø15
.9
Ø9.
5
20
0
Ø
19
.1
25
0
Ø
22
.2
G
as si
de
Liqu
id side
R
X
(Y
)Q5
Ø15.9
➞
Ø19.
1
RX
(Y
)Q
5
Ø
9
.5
—
R
X
(Y
)Q8
Ø19.1
➞
Ø22.
2
R
X
(Y
)Q8+
10
Ø9.5
➞
Ø12.
7
R
X
(Y
)Q10
Ø22.2
➞
Ø25.
4
a
a.
If
not
ava
ila
b
le
, i
n
cr
ea
se i
s
n
o
t
al
lo
w
e
d
R
X
(Y
)Q12~
16 +
RXY
HQ12+
16
Ø12.7
➞
Ø15.
9
R
X
(Y
)Q12 +
14 +
RXYH
Q12
Ø28.6
—
R
X
(Y
)Q18 +
RXYQ
2
0
~
24 +
RXYHQ
1
8
~
2
4
Ø15.9
➞
Ø19.
1
R
X
(Y
)Q16 +
18 +
RXYQ
20+
22 +
RXYH
Q16~
22
Ø28.6
➞
Ø31.
8
a
R
XYQ26~
54 +
RX
YHQ26~
36
Ø19.1
➞
Ø22.
2
R
XYQ24 + RXYHQ
24
Ø34.9
—
—
In
creas
e
is
not
al
lo
w
e
d
R
XYQ26~
34 +
RX
YHQ26~
34
Ø34.9
➞
Ø38.
1
a
R
XYQ36~
54 +
RX
YHQ36
Ø41.3
—
—
In
creas
e
is
not
al
lo
w
e
d
1
Ou
td
oo
r u
n
it
2
Mai
n pi
pe
s
3
In
crea
se
4
First re
frig
eran
t b
ra
n
ch
kit
5
In
d
oor
u
n
it
1
6
2
5
4
3
Th
e
re
fr
igera
nt cha
rge of
t
he syst
em
must
be les
s
than
1
0
0
kg. Thi
s m
e
ans tha
t in
ca
se the cal
cul
a
ted
re
fr
igera
nt cha
rge i
s
e
qual
t
o
or m
o
re th
an 100
kg you
must
div
ide
yo
ur m
u
lti
p
le outdoo
r syst
em
in
to
s
m
al
le
r
inde
penden
t syst
ems,
ea
ch contain
ing
le
ss t
han 100
kg
re
fr
igera
nt cha
rge.
Fo
r fac
tor
y char
ge,
r
e
fe
r to th
e
u
n
it name
pl
at
e.
X
1.
..
6
=
T
o
ta
l l
e
n
g
th
(
m
)
of l
iq
u
id p
ipi
ng
si
ze a
t
Øa
A
=
W
e
ight
acco
rd
in
g
to
ta
bl
e
Ø9
.5
➞
Ø1
2.7
Ø
15.9
➞
Ø
19.1
Ø
22.2
➞
Ø2
5.4*
Ø
12.7
➞
Ø1
5.9
Ø
19.1
➞
Ø
22.2
Ø
28.6
➞
Ø3
1.8*
Ø
34.9
➞
Ø3
8.1*
ab
c
d
e
f
g
H1
p
AB
C
D
E
F
G
12
3
4
5
6
7
8
H2
hi
j
k
l
m
n
1
2
3
1
Ou
td
oo
r u
n
it
2
Refn
et jo
int
s
(a~
g)
3
In
d
oor
u
n
it
s (
1
~
8
)
