9
English
6-5 Example of connection
Example of connection
(Connection of 8 indoor units)
(*1) “ ” Indicate the Outdoor unit multi
connection piping kit.
(*2) In case of multi outdoor system,
re-read “outdoor unit” to “Outdoor unit
multi connection piping kit” as seen
from the indoor unit.
Branch with REFNET joint
Branch with REFNET joint and header
Branch with REFNET header
Single
outdoor
system
Multi
outdoor
system
1 ~ 8
: Indoor unit
1 ~ 8
: Indoor unit
1 ~ 8
: Indoor unit
1 ~ 8
: Indoor unit
1 ~ 8
: Indoor unit
1 ~ 8
: Indoor unit
Outdoor
unit
REFNET joint
(A, B)
REFNET
header
Function unit
a
b
j
k
H2
de
f
g
h
i
12
34
56
78
c
H4
H1
Outdoor unit
REFNET joint
(A~G)
Function unit
H4
c
de
f
g
h
ij
k
m
n
p
q
H2
H1
1
23
4
5
6
7
8
H3
r
a
b
s
H4
a
b
Outdoor unit
REFNET header
Function unit
H4
H1
12
34
5
6
7
8
H2
d
ce
f
g
h
i
j
r
a
s
b
H3
A
B
C
D
E
F
G
Outdoor unit
REFNET joint
(A~G)
Function unit
a
b
c
de
f
g
h
ij
k
m
n
p
q
H2
H1
12
3
4
5
6
7
8
H4
A
B
C
D
E
F
G
A
B
H2
78
Outdoor unit
REFNET joint
(A, B)
REFNET
header
Function unit
k
d
ef
g
h
i
12
34
56
c
H4
H1
j
H3
r
a
b
s
A
B
Outdoor
unit
REFNET header
Function unit
H1
12
34
5
6
7
8
H2
d
ce
f
g
h
i
j
Maximum
allowable
length
Allowable
height
difference
Between outdoor unit (*2)
and indoor unit
Between outdoor unit and function unit
Between outdoor unit and outdoor unit
multi connection piping kit
Between outdoor and indoor units
Between indoor and indoor units
Between outdoor and outdoor units
Between outdoor unit and function unit
Actual pipe
length
Equivalent
length
Actual and
Equivalent
pipe length
Difference in height
Difference in height
Difference in height
Difference in height
Total extention length
Pipe length between outdoor unit (*2) and indoor unit
≤
165m
Example 8 : a + b + c + d + e + f + g +h +q
≤
165m
Example 6 : a + b + c + i
≤
165m, 8 : a + b + j +
≤
165m
Example 8 : a + b + j
≤
165m
Equvalent pipe length between outdoor unit (*2) and indoor unit
≤
190m (Note 1)
(Assume eqivalent pipe length of REFNET joint to be 0.5m, that of REFNET header to be 1m, that of function unit to be 6m for ca
lculation purposes)
Total piping length from outdoor unit (*2) to all indoor unit
≤
500m
Actual pipe length from outdoor unit to function unit, that from first outdoor unit multi connection piping kit to outdoor unit
≤
10m
Equivalent pipe length from outdoor unit to function unit, that from first outdoor unit multi connection piping kit to outdoor
unit
≤
13m
Actual pipe length from first refrigerant branch kit (either REFNET joint or REFNET header) to indoor unit
≤
40m (Note 2)
Difference in height between outdoor unit and indoor unit (H1)
≤
50m (Max 40m if the outdoor unit is below)
Difference in height between indoor units (H2)
≤
15m
Difference in height between outdoor units (H3)
≤
5m
Difference in height between outodoor unit and function unit (H4)
≤
1m
a
≤
10m
(Equivalent length
≤
13m)
r
≤
10m
(Equivalent length
≤
13m)
s
≤
10m
(Equivalent length
≤
13m)
s
r
a
Outdoor unit
Function unit
Allowable length after the branch
Actual pipe
length
Example 8 : c + d + e + f + g + h + q
≤
40m
Example 6 : c + i
≤
40m, 8 : j +
≤
40m
Example 8 : j
≤
40m
01_EN_3P201178-10P.fm Page 9 Wednesday, September 2, 2009 11:10 AM