Daikin BRC7E61W Service Manual Page 234

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SiENBE34-703 Example of Connection
Appendix 223
g
mn
67
8
H2
H1
P
H1
H2
a
a
i
i
b
cde f
g
h
123456
k
j
78
H1
H2
cde
f
g
h
b
1234567
8
FG
A
B
0
0
*
0
0
*
f 9.5 × 0.8
ø
15.9 × 1.0
ø
9.5 × 0.8
63 · 80 · 100 ·
125 type
ø
12.7 × 0.8
ø
6.4 × 0.8
ø
15.9 × 1.0
ø
9.5 × 0.8
20 · 25 · 32 ·
40 · 50 type
Indoor unit
capacity type
a: × 30m
b: × 10m
c: 09.5
9.5
9.5
× 10m
d: 9.5 × 13m
e: 6.4
6.4
× 10m
f : × 10m
g: 16.4 × 10m
h: 16.4 × 20m
i : 9.5 × 10m
j : 16.4 × 10m
k: 16.4 × 19m
R= 73 0.054 + 69 0.022 = 5.46
a+b+c+d+i e+f+g+h+j+k
5.5
fnet joint
Branch with refnet joint and refnet header
Branch with refnet header
Example for refrigerant branch using refnet joint and refnet header
The piping lengths
are as at right
h
en the size is larger
Piping size (outer diameter × minimum thickness)
Liquid pipe
Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
P
iping size
e
r × minimum thickness)
Piping size
(outer diameter × minimum thickness)
g
erant branch kit
p
iping on the outdoor unit.
Use the pipe size from the following table.
e
Connection pipe size
(Unit: mm)
(Unit: mm) (Unit: mm)
Pipe size for direct connection to indoor unit must be the
same as the connection size of indoor unit.
Indoor unit connection pipe size
Between refrigerant branch kit and indoor unit
Piping between refrigerant branch kits
o
or and indoor units 150m
f
+ g + p
150m
Example unit 6: a + b + h
120m, unit 8: a + i + k
150m
Example unit 8: a + i 150m
outdoor and indoor units
175m (assume equivalent pipe length of refnet joint to be 0.5m, that of refnet header to be 1m, calculation purposes)
t
door unit to all indoor units 10m, 300m
e
n outdoor and indoor units (H1) 50m (Max 40m if the outdoor unit is below)
e
n adjacent indoor units (H2) 15m
e
rant branch kit (either refnet joint or refnet header ) to indoor unit 40m
How to select the refnet header
• Choose from the following table below the REFNET header according
to the number of units on the system.
Example unit 8: i 40m
Example unit 6: b + h
40m, unit 8:i + k
40m
f + g + p
40m
o
llowing table.
KHRP26M22T
RXYSQ4, 5, 6 type
KHRP26M22H (Max. 4 branch)
KHRP26M33H (Max. 8 branch)
Refrigerant branch kit name
Outdoor unit capacity type
Refrigerant branch kit name
type
Refnet headerOutdoor unit
Indoor units (1-8)Indoor units (1-8)(1-8)
Outdoor unit REFNET joint (A • B)
EFNET joint (A-G)
Refnet header
o
tal length (m)
liquid piping
z
e at
ø
6.4
×0.022
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