Hitachi FSG1 Series Technical Catalogue page 294

REFRIGERANT PIPING AND REFRIGERANT CHARGE
13
/18
n
Header Distribution
§ Branch Method
Do not connect two header branches consecutively
Indoor Unit
CORRECT
Main
Pipe
Header
§ Installation Position
Install the header horizontally
Gas Piping (High & Low)
Liquid Piping
To Outdoor Unit
To Indoor Unit
To Outdoor Unit
To Indoor Unit
&
CAUTION:
Seal the end of branch pipes which are not connected,
by brazing factory-supplied closing pipes.
Header Indoor Unit
INCORRECT
Main
Pipe
Header
Horizontally
Horizontally
n
Combination Branch
It is possible to connect the header to the second line
branch, when the first branch is also the line branch.
Do not connect a line branch to a header branch.
CORRECT
Max. 30
Line
Branch
(first
Branch)
Indoor Unit
Header
Max. 30
Line Branch
Header
Line Branch (first Branch)
The Second
Branch
Header
INCORRECT