Selection Of Refrigerant Branch Kits; System Piping (Length) Limitations - Daikin RELQ72TBTJ Series Installation Manual

7.4. Selection of refrigerant branch kits

For piping example, refer to 7.3. Selection of piping size on page 10.
• When using REFNET joints at the first branch from the outdoor
units, choose from the following table in accordance with the capac-
ity of the outdoor unit (example: REFNET joint a - see 7.3. Selection
of piping size).
Outdoor unit capacity type
RELQ 72, 96 T type
RELQ 120-192 T type
RELQ 240 T type
• For REFNET joints other than the first branch (example REFNET
joint b - see 7.3. Selection of piping size), select the proper branch
kit model based on the total capacity of all indoor units connected
after the refrigerant branch.
Indoor unit
capacity index
(for 3 pipes)
KHRP25A22T9
< 72
KHRP25A22TA
KHRP25A33T9
72 ≤ × < 111
KHRP25A33TA
KHRP25M72TU9
111 ≤ × < 246
KHRP25M72TUA
KHRP25M73TU9
≥246
KHRP25M73TUA

7.5. System piping (length) limitations

<Example of refrigerant piping (12 indoor units are connected)>
First outdoor unit
Outdoor unit
multi connection
piping kit (*1)
A
a
b
B
A
e
B1
f g
1 2
(*1) " " represents an outdoor unit multi connection piping kit.
The outdoor unit multi connection piping kit must always be installed horizontally, paying attention to the installation restrictions indicated in
8. Precautions on refrigerant piping on page 15.
11
Kit name
KHRP25A33T9
KHRP25A33TA
KHRP25M72TU9
KHRP25M72TUA
KHRP25M73TU9
KHRP25M73TUA
Kit name
(for 2 pipes)
KHRP26A22T9
KHRP26A22TA
KHRP26A33T9
KHRP26A33TA
KHRP26M72TU9
KHRP26M72TUA
KHRP26M73TU9
KHRP26M73TUA
B1
Outdoor unit
B2 , B3
B4 , B5
D
REFNET joint (A-F)
c d
D
C
k
B2
5
r
h
F
j
i
3 4
• Concerning REFNET headers, choose from the following table in
accordance with the total capacity of all the indoor units connected
after the REFNET header.
Indoor unit
capacity index
(for 3 pipes)
< 72
KHRP25M33H9
KHRP25M33HA
72 ≤ × < 111
KHRP25M72H9
111 ≤ × < 230
KHRP25M72HA
KHRP25M73HU9
≥230
KHRP25M73HUA
INFORMATION
Maximum 8 branches can be connected to a header.
• How to choose an outdoor multi connection piping kit (needed if the
outdoor unit capacity type is 144 or more). Choose from the follow-
ing table in accordance with the number of outdoor units.
Number of outdoor units
2
: Branch Selector unit (multi) 1
: Branch Selector unit (single)
: Branch Selector unit (multi)
connected in pass through
m
B3
n
E
p
o
6 7
u
B4
s t v
8 9 10
Kit name
(for 2 pipes)
KHRP26M22H9/
KHRP26M22HA:
maximum 4 indoor units
or
KHRP26M33H9/
KHRP26M33HA:
maximum 8 indoor units
KHRP26M33H9
KHRP26M33HA
KHRP26M72H9
KHRP26M72HA
KHRP26M73HU9
KHRP26M73HUA
Branch kit name
BHFP26P100U
BHFP26P100UA
- 11 : Indoor units (cooling/heating
selectable)
12 : Indoor unit (cooling only)
(*3)
q
12
B5
w
11
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