Hitachi RAS-3HVRNS - Connecting Flare Adapter (Only for RAS-(2;2.5)HVRN1(E)); Drain Discharging Boss

3 Correct position of twin distributor
Correct position of twin branch pipe Wrong position of twin branch pipe
A
B
C
D
E
F
G
A
A
B
B
C
C
C
A. Up.
B. Greater than 0.5 m.
C. Main pipe.
D. Refrigerant direction.
E. Refrigerant Main pipe direction.
F. Branch pipe.
G. Main pipe.
A. Refrigerant direction.
B. Main pipe.
C. Branch pipe.
4 Correct position of triple branch pipe
Install the header horizontally
Example: Triple Branch pipe
1. Gas piping.
2. Liquid piping.
3.4.5 Connecting flare adapter (only for RAS-(2/2.5)HVRN1(E))
1. Liquid line.
2. Flare nut (Accessories).
3. Pipe (Accessories).
4. Indoor unit.
5. Flare adapter (Accessories).
6. Gas line.
7. Pipe (Field supplied).
The piping sizes for indoor unit and outdoor unit are different. Attach the flare adapter (accessories) at the indoor piping
union part.
Use the adequate flare adapter as follows:
Indoor unit
Flare adapter
Gas pipe Liquid pipe
2.0 HP
Big size
(Ø15.88→Ø12.70)
—
2.5 HP
Big size
(Ø15.88→Ø12.70)
Small size
(Ø9.53→Ø6.35)
3.4.6 Drain discharging boss
When the base of the outdoor unit is temporarily used as a drain receiver and the drain water in it is discharged, this drain
boss is used to connect the drain piping.
Model
Applicable Model
DBS-12L (2-3)HVRNM(1)(S)
DBS-26/DBS-26L (4-6)HVRNS1E/(8/10)HRNSE
1
2
1
2
3
4
5
6
7
3 Piping work and
refrigerant charge
79
SMGB0060 rev. 1- 12/2010
3