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PIPING WORK AND REFRIGERANT CHARGE
For selecting the pipe sizes between the outdoor unit and the piping connection kit
piping connection kit Ⓐ, refer to the items from "Connection of refrigerant pipes for heat recovery system (3 pipes)" in the manual on
the CD-ROM.
Outdoor
unit A
A
1
3
2
B
C
C
4
4
5
G
G
CH
4
7
Indoor
unit
C
5
G
7
7
Indoor
Indoor
unit
unit
C
5
6
6
CH
D
G
7
6
Indoor
unit
D
7
7
Indoor
unit
(Exclusive use of cooling operation)
E
Header branch
4
5
5
CH
CH
7
7
Indoor
Indoor
unit
unit
C A U T I O N
CH
Change-over box
(Single Branch Type)
Indoor unit
Upstream
23
PMML0479 rev.2 - 02/2018
Outdoor
Outdoor
unit B
unit C
1
1
A
5
5
G
CH
CH
7
7
Indoor
Indoor
unit
unit
CH-M
7
7
Indoor
Indoor
unit
unit
D
7
7
Indoor
Indoor
unit
unit
High/Low pressure gas pipe, low pressure gas pipe, liquid pipe
Terminal
Indoor
Gas pipe, liquid pipe
unit
Low pressure gas pipe, liquid pipe
CH :
CH-Box (Single branch type)
CH-M :
CH-Box (Multiple branch type)
5
6
CH
5
CH
7
Indoor
unit
Header branch
Change-over box
(Multiple Branch Type)
CH-M
CH
Indoor unit
Downstream
, between the piping connection kits
Low pressure
5
gas pipe
High/Low
5
pressure gas pipe
6 7
Gas pipe
CH-Box is not connected to liquid pipe
Three pipes section
Liquid pipe
5
6 7
Gas pipe
6 7
Liquid pipe
Two pipes section
F
Header branch
7
7
7
Indoor
Indoor
Indoor
unit
unit
unit
CH-M
Indoor unit
Upstream
Three pipes section
CH
Liquid pipe
6 7
Two pipes section
High/Low pressure gas pipe
5
Low pressure gas pipe
5
CH-M
6 7
*3
Two pipes section
Change-over box
(Multiple Branch Type)
Header branch
CH-M
Indoor unit
Downstream
and for
Gas pipe
Liquid pipe
6 7
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