Hitachi RAS-3-HVNC - Drain Piping

3. Piping work and refrigerant charge
71
SMGB0079 rev.0 - 01/2013
3
3 Correct position of distributor (available also for quad installation)
• This is the correct position:
G r e a t e r
than 0.5 m
Main pipe
Refrigerant direction
Up
Branch pipe
Main pipe
Refrigerant di-
rection
Down
• This is wrong position.
Main pipe
Refrigerant direction
Branch pipe
Branch pipe
Refrigerant di-
rection
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
3.3.7 Connecting are adapter
Flare nut (accessories)
Pipe (accessories)
Indoor unit
Flare adapter (accessories)
Gas line
Pipe
(eld
supplield)
Liquid line
The piping sizes for indoor unit and outdoor unit are different. Attach the are adapter (accessories) at the indoor piping
union part.
Use the adequate are adapter as follows:
Indoor unit
Flare adapter
Gas pipe Liquid pipe
2.0 HP
Big size
(
∅15.88→∅12.70)
-
2.5 HP
Big size
(
∅15.88→∅12.70)
Small size
(∅9.52→∅6.35)