Example Of Connection (R-410A Type) - Daikin RQYQ140-180PY1 Service Manual

SiBE341001

4. Example of connection (R-410A Type)

Heat Pump series (RQ(C)YQ)
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.
Actual pipe length
Between outdoor (∗2)
and indoor units
Maximum Equivalent length
allowable
Total extension length
length
Actual pipe length
Between outdoor unit and Outdoor unit multi
connection piping kit (Only for multi system) Equivalent length
Between outdoor and indoor units Difference in height
Allowable
Difference in height
height Between indoor and indoor units
length
Between outdoor and outdoor units Difference in height
Actual pipe length
Allowable length after the branch
Refrigerant branch kit selection
Refrigerant branch kits can only be
used with R410A.
• 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.
Example for indoor units connected downstream
Appendix
Example refrigerant branch using REFNET joint
REFNET joint (A-G)
Outdoor unit
Single outdoor
a b c d e f
system
A B C D E
h i j k l
1 2 3 4 5
Indoor units ( 1 - 8 )
Outdoor unit
H3
Multi outdoor
a b c d
system
A B C D
h i j k
First Outdoor
1 2 3 4
unit multi connection
piping kit
Indoor units ( 1 - 8 )
Pipe length between outdoor (∗2) and indoor units ≤ 120m
Example unit 8 : a + b + c + d + e + f + g + p ≤ 120m
Equivalent pipe length between outdoor (∗2) and indoor units ≤ 150m (assume equivalent pipe length of REFNET joint to be 0.5m, that of REFNET header to be 1m, calculation purposes) (See Note 1 - Next page)
Total pipe length from outdoor unit (∗2) to all indoor units ≤ 300m
Pipe length between outdoor unit and outdoor unit multi connection piping kit ≤ 10m, equivalent length between outdoor unit and outdoor unit multi connection piping kit ≤ 13m
Difference in height between outdoor and indoor units (H1) ≤ 50m
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 indoor unit ≤ 40m
Example unit 8 : b + c + d + e + f + g + p ≤ 40m
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)
Outdoor unit capacity type
Q140·180 type
Q280 type
Q360~540 type
• Choose the REFNET joints other than that for the first branch from the following table in accordance with the total
capacity index of all the indoor units connected below the REFNET joint.
Indoor unit total capacity index
< 200
200 ≤ x< 290
290 ≤ x< 640
640 ≤
3 + 4 + 5 + 6 + 7 + 8
Example REFNET joint C: indoor units
Example refrigerant branch using REFNET joint and REFNET header
Outdoor unit
a
g H1
H1
REFNET header
F G
p
m n
6 7
H2
8
Outdoor unit
REFNET joint (A-G)
H1
e f g
H1
REFNET header
E F G
p
l m n
5 6 7
H2
8
Example unit 6 : a + b + h ≤ 165m, unit 8 : a + i + k ≤ 120m
( ≤ 40m if the outdoor unit is below)
Example unit 6 : b + h ≤ 40m, unit 8 :i + k ≤ 40m
Refrigerant branch kit name
KHRP26A22T
KHRP26A33T
KHRP26A72T
Refrigerant branch kit name
KHRP26A22T
KHRP26A33T
KHRP26A72T
KHRP26A73T + KHRP26M73TP
Example REFNET joint B: indoor units
Example REFNET header: indoor units 1 + 2 + 3 + 4 + 5 + 6
Example refrigerant branch using REFNET header
REFNET joint (A • B)
i
A B
k
b
j
7 8
H2
g
c d e f h
1 2 3 4 5 6
Indoor units ( 1 - 8 )
REFNET joint (A • B)
H3
i
a
A B
k
b
j
7 8
H2
g
c d e f h
1 2 3 4 5 6
Indoor units ( 1 - 8 )
Example unit 8 : a + i ≤ 120m
Example unit 8 : i ≤ 40m
How to select the REFNET header
• Choose from the following table in accordance with the total capacity index of all the indoor units connected
below the REFNET header.
• Note: 250 type indoor unit cannot be connected below the REFNET header.
Indoor unit total capacity index
< 200 KHRP26M33H
200 ≤ x< 290
KHRP26M33H
290 ≤ x< 640
KHRP26M72H
640 ≤
KHRP26M73H + KHRP26M73HP
How to select the Outdoor unit multi connection piping kit (This is required when the system is multi outdoor unit
system.)
• Choose from the following table in accordance with the number of outdoor units.
Number of outdoor units
2 units
3 units
7 + 8
Example REFNET header: indoor units 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8

Example of connection (R-410A Type)

REFNET header
Outdoor unit
a
H1
b c d e f g h i
1 2 3 4 5 6 7 H2
8
Indoor units ( 1 - 8 )
Outdoor unit
REFNET header
H3
a
H1
g
b c d e f h i
1 2 3 4 5 6 7 H2
8
Indoor units ( 1 - 8 )
Outdoor unit
r ≤ 10m (Equivalent length: ≤ 13m)
s ≤ 10m (Equivalent length: ≤ 13m)
r
t
t ≤ 10m (Equivalent length: ≤ 13m)
s
Refrigerant branch kit name
Connection piping kit name
BHFP22P36C
BHFP22P54C
216