Hitachi RAS-(4-12)HNP(1)(E) - Installing Distributor

3 Piping work and
refrigerant charge
81
SMGB0087 rev.0 - 12/2013
3

Installing Distributor
1 Install the distributor supplied by HITACHI on request.
A tee can not be installed instead of a branch pipe.
2 Installing the distributor
Fix the branch pipe horizontally to the pillar, wall or ceiling. Piping must not be xed rigidly to the wall as thermal expansion
and contraction can cause pipe fracture.
Horizontal
To indoor
unit
To outdoor unit
Vertical
To Indoor unit
Fixing the branch pipe to the
surface of pillar or wall
Horizontal
Horizontal
Fixing the branch pipe to
ceiling or beam
 N O T E
Fixthepipingfromoutsideofinsulationorinsertingabsorberbetweenthepipeandaxingmetal.
3 Correct position of distributor (available also for quad installation)
Thisisthecorrectposition Thisiswrongposition
Greater
than 0.5 m
Main pipe
Refrigerant direction
Up
Branch pipe
Main pipe
Refrigerant
direction
Down
Main pipe
Refrigerant direction
Branch pipe
Branch
pipe
Refrigerant
direction
Branch pipe
Main pipe
4 Correct position of Triple Branch Pipe (Standard series only).
• Install the header horizontally
Sample: Triple Branch pipe
Gas piping
Liquid piping