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Outside unit multi connection piping kit and
Refrigerant branch kit selection
Pipe size selection
•
Refrigerant branch kits can only be used with R410A.
•
When multi outdoor system are installed, be sure to use the
special separately sold Outside unit multi connection piping
kit. (BHFP22P100U).
(For how to select the proper kit, follow the table at right.)
•
Never use BHFP26M90U, BHFP22M90U for M type of this
series or T joint (field supplyed).
How to select the REFNET joint
Piping between outside unit(*2) and refrigerant branch kit (partA)
How to select the REFNET header
When using REFNET joint at the first branch counted from the outside unit side,
choose from the following table in accordance with the outside unit capacity type.
(Example :REFNET jointA)
Choose from the following table in accordance with the outside units system
capacity type.
Piping between outside unit multi connection piping kit and outside unit (part B)
Choose from the following table in accordance with the capacity type
of the outside unit connected.
Choose form the following table in accordance with the total capacity index of all
the indoor units conncted below the REFNET header.
How to select the outside unit multi connection piping kit
(This is required when the system is multi outside unit system.)
Choose from the following table in accordance with the number of outside units.
Choose the REFNET joints other than the first branch from the following table in a accordance
with the total capacity index of all the indoor units connected below the REFNET joint.
Outside unit capacity type
RXYQ72 · 96PA type
RXYQ108 ~ 192PA type
Indoor unit total capacity index
x < 72
72
≤
x < 111
111
≤
x
Refrigerant branch kit name
KHRP26M33T
KHRP26M72TU
Refrigerant branch kit name
KHRP26M22T
KHRP26M33T
KHRP26M72TU
Indoor unit total capacity index
x < 72
72
≤
x < 111
111
≤
x
Number of outside unit
2 units
Connecting piping kit name
BHFP22P100U
Refrigerant branch kit name
KHRP26M22H or KHRP26M33H
KHRP26M33H
KHRP26M72H
Example for indoor units
connected downstream
Example REFNET joint C : Indoor units 5 + 6 + 7 + 8
Example REFNET joint B : Indoor units 7 + 8
Example REFNET header : Indoor units 1 + 2 + 3 + 4 + 5 + 6
Example REFNET header :
indoor units 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8
The thickness and material shall be selected in
accordance with local code.
For an outside unit installation, make
the settings in accordance with the
following figure.
Outside unit
High side equalizer pipe (part C)
Piping between outside unit
multi connection piping kit
and outside unit (part B)
Piping between outside unit multi
connection piping kits
Piping between outside unit and
refrigerant branch kit (part A)
Outside unit
capacity type
RXYQ72PA type
RXYQ96PA type
RXYQ108PA type
RXYQ144PA type
RXYQ168PA type
RXYQ192PA type
Piping size (O. D.)
Piping size (O. D.)
Gas pipe
φ
3/4
φ
7/8
φ
1-1/8
Liquid pipe
φ
3/8
φ
1/2
φ
5/8
Outside unit
capacity type
RXYQ72PA type
RXYQ96PA type
Gas pipe
φ
3/4
φ
7/8
Liquid pipe
φ
3/8
Piping between refrigerant branch kits
Choose from the following table in accordance with the total capacity type
of all the indoor units connected downstream.
Piping between refrigerant branch kit and indoor unit.
High side Equalizer pipe (part C)(outside multi system only)
Match to the size of the connection pipng on the indoor unit.
*1 Connection piping must not exceed the refrigerant Piping size between outside
unit and refrigerant branch kit (part A)
Indoor capacity index
x < 54
54
≤
x < 72
72
≤
x < 111
111
≤
x < 162
162
≤
x
Indoor unit capacity type
07 · 09 · 12 · 18
24 · 30 · 36 · 48
Gas pipe
φ
1/2
φ
5/8
Liquid pipe
φ
1/4
φ
3/8
Piping size (O. D.)
φ
3/4
(unit : in.)
(unit : in.)
Piping size (O. D.)
(unit : in.)
Piping size (O. D.)
(unit : in.)
(unit : in.)
Low side Equalizer pipe (part D)(outside multi system only)
Piping size (O. D.)
φ
3/4
(unit : in.)
Gas pipe
φ
5/8
φ
3/4
φ
7/8
φ
1-1/8
Liquid pipe
φ
3/8
φ
1/2
φ
5/8
Low side equalizer pipe (part D)
