Daikin RXYQ5PY1, Service Manual

Page: 240 / 355

Heat Pump / Cooling Only 50Hz (RX(Y)Q5~54P) SiEN34-705
234 Installation Manual
3.6.5 E
XAMPLE OF
C
ONNECTION
)
Example refrigerant branch using REFNET joint Exam
a b c d e f
g
H1
p
Outdoor unit
REFNET joint (A-G)
Indoor units ( 1 - 8 )
Between outdoor and indoor units
Between indoor and indoor units
Between outdoor and outdoor units
Actual pipe length
Actual pipe length
Actual pipe length
Equivalent length
Difference in height
Difference in height
Difference in height
Equivalent length
Total extension length
Pipe length between outdoor (
∗
2) and indoor units
≤
165m
Example unit 8 : a + b + c + d + e + f + g + p
≤
165m
Example unit 8 : b + c + d + e + f + g + p
≤
40m
Equivalent pipe length between outdoor (
∗
2) and indoor units
≤
190m (assume equivalen
Pipe length between outdoor unit and Outdoor unit multi connection piping kit
≤
10m, Equ
Difference in height between outdoor and indoor units (H1)
≤
50m (
≤
90m if the outdoo
Difference in height between indoor units (H2)
≤
15m
Difference in height between outdoor unit (H3)
≤
5m
Pipe length from first refrigerant branch kit (either REFNET joint or REFNET header ) to i
Total pipe length from outdoor unit (
∗
2) to all indoor units
≤
1000m
Allowable length after the branch
Refrigerant branch kit selection
Pipe size selection
Exa
Exam
How to select the REFNET joint
• When using REFNET joint at the first branch counted from the outdoor unit side.
Choose from the following table in accordance with the outdoor unit capacity type.
(Example: REFNET joint A)
Temper grade and wall thickness for pipes.
(Temper grade, O type and 1/2H type indicate the material types specified in JIS
H 3300.)
5HP type
8, 10HP type
12~22HP type
24HP type~
KHRP26A22T
KHRP26A33T
KHRP26A72T
KHRP KH
• Choose the REFNET joints other than that for the first branch from the following table in
capacity index of all the indoor units connected below the REFNET joint.
Example REFNET joint C: indoor units Example for indoor units connected downstream
(Unit:mm)
(Se
R= +
Outdoor unit capacity type Refrigerant branch kit n
O
+ +
+
⎛
⎜
⎝
⎞
⎟
⎠
×0.37
⎛
⎜
⎝
⎞
⎟
⎠
×0.26
⎛
⎜
⎝
⎞
⎟
⎠
×0.18
⎛
⎜
⎝
⎞
⎟
⎠
×0.022
For the multi outdoor unit system, select in accordance with the following figure.
A B C D E F G
1 2 3 4 5 6 7
8
H2
h i j k l m n
3 + 4 + 5 + 6 + 7 + 8
Exam
Exam
Caution
The thickness of the pipes in the table shows the requirements of Japanese
High Pressure Gas Control low. (As of Jan. 2003)
The thickness and material shall be selected in accordance with local code.
a b c d e f g
8
H2
H1
H3
p
Outdoor unit
REFNET joint (A-G)
h i j k l m n
1 2 3 4 5 6 7
Indoor units ( 1 - 8 )
Part C
Part B Part A
O type
1/2H type
φ
6.4 0.80
φ
9.5 0.80
φ
12.7 0.80
φ
15.9 0.99
φ
19.1 0.80
φ
22.2 0.80
φ
25.4 0.88
φ
28.6 0.99
φ
31.8 1.10
φ
34.9 1.21
φ
38.1 1.32
φ
41.3 1.43
Pipin
Pipin
bran
• Ch
Pip
Pip
• Ch
the
A B C D E F G
Temper grade Copper tube O.D.
Copper tube W.T.
(Minimum requirement)
< 200
200
≤
x< 290
290
≤
x< 640
640
≤
KHRP26A22T
KHRP26A33T
KHRP26A72T
KHRP KH
Indoor unit total capacity index Refrigerant branch kit n
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 to the first
Outdoor unit multi connection piping kit as seen
from the indoor unit.
Maximum
allowable
length
Allowable
height
length
Between outdoor unit and Outdoor unit multi
connection piping kit (Only for multi system)
Refrigerant branch kits can only be
used with R-410A.
• 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.
Between outdoor (
∗
2)
and indoor units
How to calculate the additional refrigerant to be
charged
Additional refrigerant to be charged R (kg)
(R should be rounded off in units of 0.1Kg.)
Total length (m)
of liquid piping
size at
φ
22.2
Total length (m)
of liquid piping
size at
φ
19.1
Total length (m)
of liquid piping
size at
φ
15.9
Total length (m)
of liquid piping
size at
φ
6.4
First Outdoor unit
multi connection
piping kit
Single outdoor
system
Multi outdoor
system