Hitachi SET FREE-Serie Bedienungsanleitung Seite 33

PIPING WORK AND REFRIGERANT CHARGE
For heat recovery systems (3 pipes)
For selecting the pipe sizes between the outdoor unit and the piping connection kit , between the piping connection kits  and for
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
Header branch cannot be connected to upstream or downstream piping of CH-Box multiple.
CH
Change-over box
(Single Branch Type)
Indoor unit
Upstream
23 PMML0479 rev.2 - 02/2018
Outdoor Outdoor
unit C
unit B
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
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
5 Low pressure gas pipe
CH-M
6 7
• • •
*3
Two pipes section
Change-over box
(Multiple Branch Type)
Header branch
CH-M
Indoor unit
Downstream
Gas pipe
Liquid pipe
6 7