9
English
6-5 Example of connection
Heat Pump series (RQ(C)YQ)
Example of connection
(Connection of 8 indoor units)
Single outdoor
system
Example refrigerant branch using REFNET joint
Example refrigerant branch using REFNET joint and REFNET header
Example refrigerant branch using REFNET header
ab
c
d
e
f
g
H1
p
Outdoor unit
REFNET joint (A-G)
Indoor units ( 1 - 8 )
H1
H2
a
a
i
b
cd
e
f
g
h
k
j
78
H1
H2
Outdoor unit
REFNET header
cd
e
f
g
hi
b
12
3
4
5
6
7
8
Multi outdoor
system
(
∗
2)
In case of m
ulti outdoor system, re-read to the first
Outdoor unit m
ulti connection piping kit as seen
from the indoor unit.
Maxim
um
allo
w
ab
le
length
Betw
een outdoor
(
∗
2)
and indoor units
Betw
een outdoor unit and Outdoor unit m
ulti
connection piping kit (Only f
or multi system)
Betw
een outdoor and indoor units
Betw
een indoor and indoor units
Betw
een outdoor and outdoor units
Actual pipe length
Actual pipe length
Actual pipe length
Equiv
alent length
Diff
erence in height
Diff
erence in height
Diff
erence in height
Equiv
alent length
T
otal e
xtension length
Pipe length betw
een outdoor (
∗
2) and indoor units
≤
120m
Example unit 8 :
a + b + c + d + e + f + g + p
≤
120m
Example unit 8 :
b + c + d + e + f + g + p
≤
40m
Equiv
alent pipe length betw
een outdoor (
∗
2) and indoor units
≤
150m (assume equiv
alent pipe length of REFNET joint to be 0.5m, that of REFNET header to be 1m, calculation pur
poses) (See Not
e 1 - Ne
xt page)
Pipe length betw
een outdoor unit and outdoor unit m
ulti connection piping kit
≤
10m, equiv
alent length betw
een outdoor unit and outdoor unit m
ulti connection piping kit
≤
13m
Diff
erence in height betw
een outdoor and indoor units (H1)
≤
50m (
≤
40m if the outdoor unit is belo
w)
Diff
erence in height betw
een indoor units (H2)
≤
15m
Diff
erence in height betw
een outdoor unit (H3)
≤
5m
Pipe length from first refr
iger
ant br
anch kit (either REFNET joint or REFNET header ) to indoor unit
≤
40m
T
otal pipe length from outdoor unit (
∗
2) to all indoor units
≤
300m
Allo
w
ab
le
height
length
Allo
w
ab
le length after the br
anch
Refrig
erant branc
h kit selection
Example unit 8 :
a + i
≤
120m
Example unit 6 :
a + b + h
≤
165m, unit 8 :
a + i + k
≤
120m
Example unit 8 :
i
≤
40m
Example unit 6 :
b + h
≤
40m, unit 8 :i + k
≤
40m
r
≤
10m (Equiv
alent length:
≤
13m)
s
≤
10m (Equiv
alent length:
≤
13m)
t
≤
10m (Equiv
alent length:
≤
13m)
Refr
iger
ant br
anch kits can only be
used with R410A.
Ho
w to select the REFNET joint
•
When using REFNET joint at the first br
anch counted from the outdoor unit side
.
Choose from the f
ollo
wing tab
le in accordance with the outdoor unit capacity type
.
(Example:
REFNET joint A)
Q140·180 type
Q280 type
Q360~540 type
KHRP26A22T
KHRP26A33T
KHRP26A72T
•
Choose the REFNET joints other than that f
or the first br
anch from the f
ollo
wing tab
le in accordance with the total
capacity inde
x of all the indoor units connected belo
w the REFNET joint.
Ho
w to select the REFNET header
•
Choose from the f
ollo
wing tab
le in accordance with the total capacity inde
x of all the indoor units connected
belo
w the REFNET header
.
•
Note:
250 type indoor unit cannot be connected belo
w the REFNET header
.
< 200
200
≤
x< 290
290
≤
x< 640
640
≤
KHRP26M33H
KHRP26M33H
KHRP26M72H
KHRP KHRP26M73HP
Ho
w to select the Outdoor unit m
ulti connection piping kit.
(This is required when the system is m
ulti outdoor unit
system.)
•
Choose from the f
ollo
wing tab
le in accordance with the n
umber of outdoor units
.
2 units
3 units
BHFP22P36C
BHFP22P54C
Example REFNET joint C:
indoor units
Example f
or indoor units connected do
wnstream
Indoor unit total capacity inde
x
Refrig
erant branc
h kit name
Number of outdoor units
Connection piping kit name
Outdoor unit capacity type
Refrig
erant branc
h kit name
A
B
(
∗
1)
“ ” indicate the Outdoor unit multi
connection piping kit.
AB
C
D
E
F
G
12
3
4
5
6
7
8
H2
hi
j
k
l
m
n
12
3
4
5
6
Outdoor unit
REFNET joint (A • B)
REFNET header
3 + 4 + 5 + 6 + 7 + 8
Example REFNET joint B:
indoor units
Example REFNET header
: indoor units
1 + 2 + 3 + 4 + 5 + 6
7 + 8
Example REFNET header
: indoor units
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8
a
bcd
e
f
g
8
H2
H1
H3
p
Outdoor unit
REFNET joint (A-G)
hi
j
k
l
m
n
1234567
First Outdoor
unit m
ulti connection
piping kit
Indoor units ( 1 - 8 )
Indoor units ( 1 - 8 )
Indoor units ( 1 - 8 )
•
When multi outdoor system are installed, be sure to
use the special separately sold Outdoor unit multi
connection piping kit.
The table at right shows how to select the proper kit.
AB
C
D
EF
G
H1
H2
a
i
b
Outdoor unit
cd
e
f
g
h
1
234
5
6
REFNET header
k
j
78
H3
REFNET joint (A • B)
AB
Indoor units ( 1 - 8 )
H2
8
H1
H3
a
Outdoor unit
REFNET header
cd
e
f
g
h
i
b
Indoor units ( 1 - 8 )
1234567
r
t
s
Outdoor unit
< 200
200
≤
x< 290
290
≤
x< 640
640
≤
KHRP26A22T
KHRP26A33T
KHRP26A72T
KHRP KHRP26M73TP
Indoor unit total capacity inde
x
Refrig
erant branc
h kit name
01_EN_3P226891-14T.fm Page 9 Tuesday, September 30, 2014 7:48 PM
