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EDUS391004-N
Installation
Installation of Outdoor Units
77
Refrigerant branch kit selection
Pipe size selection
•
Refrigerant branch kits can only be used with R410A.
How to select the REFNET joint
Piping between outdoor unit (*2 and refrigerant branch kit (part A)
How to select the REFNET header
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)
Choose from the following table in accordance with the outdoor
units system capacity type.
Choose from the following table in accordance with the total capacity index of all
the indoor units connected below the REFNET header.
Choose the REFNET joints other than the first branch from the following table in accordance
with the total capacity index of all the indoor units connected below the REFNET joint.
Outdoor unit capacity type
REYQ72 · 96P type
REYQ120 · 144P type
Indoor unit total capacity index
x < 72
72
≤
x < 111
111
≤
x
Refrigerant branch kit name
KHRP25M33T
KHRP25M72TU9
3 pipes
KHRP25M22T
KHRP25M33T
KHRP25M72TU9
2 pipes
KHRP26M22T
KHRP26M33T
KHRP26M72TU9
Refrigerant branch kit name
Indoor unit total capacity index
x < 72
72
≤
x < 111
111
≤
x
3 pipes
KHRP25M33H9
KHRP25M72H9
2 pipes
KHRP26M22H9 or KHRP26M33H9
KHRP26M33H9
KHRP26M72H9
Refrigerant branch kit name
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 outdoor unit installation, make
the settings in accordance with the
following figure.
Outdoor unit
Piping between outdoor unit and
refrigerant branch kit (part A)
Outdoor unit
capacity type
REYQ72P type
REYQ96P type
REYQ120P type
REYQ144P type
Piping size (O. D.)
Suction gas pipe
φ
3/4
φ
7/8
φ
1-1/8
HP/LP gas pipe
φ
5/8
φ
3/4
φ
7/8
Liquid pipe
φ
3/8
φ
1/2
Piping between refrigerant branch kits
Piping between refrigerant branch kit and BS unit
Piping between BS unit and refrigerant branch kit
Choose from the following table in accordance with the total capacity type of all the
indoor units connected downstream.
Piping between refrigerant branch kit, BS unit and indoor unit.
Match to the size of the connection piping on the indoor unit.
*1 Connection piping must not exceed the refrigerant Piping size between outdoor
unit and refrigerant branch kit (part A)
*2 When selecting 2 pipes line(gas pipe and liquid pipe), use Suction gas pipe
column for gas pipe and Liquid pipe column for liquid pipe.
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
·
54
72
96
gas pipe
φ
1/2
φ
5/8
φ
3/4
φ
7/8
Liquid pipe
φ
1/4
φ
3/8
(unit : in.)
Piping size (O. D.)
(unit : in.)
Piping size (O. D.)
(unit : in.)
Suction gas pipe
φ
5/8
φ
3/4
φ
7/8
φ
1-1/8
HP/LP gas pipe
φ
1/2
φ
5/8
φ
3/4
φ
1-1/8
Liquid pipe
φ
3/8
φ
1/2
φ
5/8
C: 3P215731-12R
Содержание VRV III REMQ120PBTJ
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