Installation manual
7
REYQ8~16M8W1B
VRVII System air conditioner
4PW23712-1
6.3.
Example of connection
Branc
h with refnet joint
Branc
h with refnet joint and refnet header
Branc
h with refnet header
One outdoor unit
installed
(REYQ8~16)
When m
ultiple
outdoor units
installed
(REYQ18~...)
Maxim
um
allo
wab
le
length
Betw
een outdoor and
indoor units
Actual pipe length
Pipe length betw
een outdoor and indoor units
≤
150 m
[Example] unit 8:
a+b+c+d+e+s
≤
150 m
[Example] unit 6:
a+b+l
≤
150 m, unit 8:
a+m+n+p
≤
150 m
[Example] unit 8:
a+o
≤
150 m
Equiv
alent length
Equiv
alent pipe length betw
een outdoor and indoor units
≤
175
m (Assume equiv
alent pipe length of refnet joint to be 0.5
m and of the refnet header to be 1.0
m, that of BSVQ100 and BSVQ
160 to be 4
m and that of
BSVQ250 to be 6 m (f
or calculation pur
poses)).
T
otal e
xtension
length
T
otal piping length from outdoor unit
*
to all indoor units
≤
300 m
Betw
een outdoor br
anch
and outdoor unit (Only f
or
REYQ18 or more)
Actual pipe length
Piping length from outdoor br
anch to outdoor unit
≤
10 m.
Appro
ximately length:
max.
13 m
Allo
wab
le
height
Betw
een outdoor and
indoor units
Diff
erence in
height
Diff
erence in height betw
een outdoor and indoor units (H1)
≤
50 m (
≤
40 m if outdoor unit is located in a lo
w
er position).
Betw
een indoor and indoor
units
Diff
erence in
height
Diff
erence in height betw
een adjacent indoor units (H2)
≤
15 m
Betw
een outdoor and
outdoor units
Diff
erence in
height
Diff
erence in height betw
een outdoor unit (main) and outdoor unit (sub) (H3)
≤
5 m
Allo
wab
le length after the branc
h
Actual pipe length
Pipe length from first refr
iger
ant br
anch kit (either refnet joint or refnet header) to indoor unit
≤
40 m
[Example] unit 8:
b+c+d+e+s
≤
40 m
[Example] unit 6:
b+l
≤
40 m, unit 8:
m+n+p
≤
40 m
[Example] unit 8:
o
≤
40 m
Refrig
erant branc
h kit selection
Refr
iger
ant br
anch kits can only be used with R-410A.
Ho
w to select the refnet joint
•W
hen using refnet joints at the first br
anch counted from the outdoor unit side.
Choose from the f
ollo
wing tab
le in accordance with the capacity of the outdoor unit.
•F
or refnet joints other than the fi
rst br
anch, select the proper branch kit model based on the total capacity inde
x.
Ho
w to select the refnet header
•
Choose from the f
ollo
wing tab
le in accordance with the total capacity of all the indoor units connected belo
w the
refnet header.
•
Note:
250 type cannot be connected below the refnet header.
Ho
w to c
hoose an outdoor branc
h kit (needed if the outdoor unit capacity type is
REYQ18 or more
.)
•
Choose from the f
ollo
wing tab
le in accordance with the number of outdoor units
.
Example of do
wnstream indoor units
[Example]
in case of refnet joint C;
indoor units 5+6+7+8
[Example]
in case of refnet joint B;
indoor units 7+8,
in case of refnet header;
indoor units 1+2+3+4+5+6
[Example]
in case of refnet header;
indoor units 1+2+3+4+5+6+7+8
indoor unit
BS bo
x
refnet joint
refnet header
(3 pipes)
(2 pipes)
14
2
33
1
Discharge gas side
2
Suction gas side
3
Liquid pipe
4
Gas pipe
B1
Piping from BS unit to indoor unit and piping
from refr
iger
ant br
anch kit to indoor unit used
as cooling only m
ust be composed b
y 2 pipes
(suction gas pipe and liquid pipe).
*
If the system capacity is
REYQ18
or more
,
measure to the fi
rst outdoor br
anch as seen
from the indoor unit.
A
F
B1
1
h
f
gi
k
b
m
a
l
c
G
2
j
3
4
B
B2
o
n
5
B3
q
p
6
B4
C
D
r
H2
H1
s
7
8
E
d
e
1
~
6
Cool/heat selection possib
le
7
+
8
Cooling only
A
B5
d
c
1
B1
H2
H1
a
b
f
e
2
B2
h
g
3
B3
j
i
4
B4
k
5
l
o
n
p
6
7
8
B
1
~
4,7
+
8
Cool/heat selection possib
le
5
+
6
Cooling only
H2
H1
a
i
h
4
B4
g
f
3
B3
e
d
2
B2
c
b
1
B1
k
j
5
B5
m
l
6
B6
n
7
o
8
1
~
6
Cool/heat selection possib
le
7
+
8
Cooling only
H3
REFNET joint
( ~ )
A
A
G
F
B1
1
h
f
gi
k
b
m
a
l
c
G
2
j
3
4
B
B2
o
n
5
B3
q
p
6
B4
C
D
r
H2
H1
s
7
8
E
d
e
1
~
6
Cool/heat selection possib
le
7
+
8
Cooling only
H3
A
B5
d
c
1
B1
H2
H1
am
b
f
e
2
B2
h
g
3
B3
j
i
4
B4
k
5
l
o
n
p
6
7
8
B
1
~
4,7
+
8
Cool/heat selection possib
le
5
+
6
Cooling only
H3
H2
H1
a
i
h
4
B4
g
f
3
B3
e
d
2
B2
c
b
1
B1
k
j
5
B5
m
l
6
B6
n
7
o
8
1
~
6
Cool/heat selection possib
le
7
+
8
Cooling only
s
r
t
r
≤
10 m (Appro
ximately length:
max.
13 m)
s
≤
10 m (Appro
ximately length:
max:
13 m)
t
≤
10 m (Appro
ximately length:
max 13 m)
Outdoor unit capacity type
Refrig
erant branc
h kit name
REYQ8+10
KHRQ23M29T
REYQ12~22
KHRQ23M64T
REYQ24~48
KHRQ23M75T
Indoor capacity type
Refrig
erant branc
h kit name
<200
KHRQ23M20T
KHRQ22M20T
200
≤
x<290
KHRQ23M29T
KHRQ22M29T
290
≤
x<640
KHRQ23M64T
KHRQ22M64T
>640
KHRQ23M75T
—
Indoor capacity type
Refrig
erant branc
h kit name
In case of 3 pipes
In case of 2 pipes
<200
KHRQ23M29T
KHRQ22M29H
200
≤
x<290
290
≤
x<640
KHRQ23M64H
KHRQ22M64H
>640
KHRQ23M75H
—
Number of outdoor units
Branc
h kit name
2
BHFQ23M907
3
BHFQ23M1357
