Refrigerant Piping; Set Refrigerant Pipe Dimension And Joint Pipe Steps; Connecting Pipe Installation - EAS ELECTRIC EDHP220EX Manual De Instalación

4-1 Refrigerant piping

4-1-1 Flaring
Use a pipe cutter to cut the refrigerant pipe and use an expander to make a flaring.
4-1-2 Fastening nut
Align the connecting pipe, tighten it by hand, and then use a wrench to further tighten it
!
Notice
To prevent the copper pipe from internal oxidation, its welding must be done with nitrogen filled.
1.
Otherwise, the oxide skin will plug the refrigeration system!
While the nut is being fastened, too much force will break the flared socket, but too weak force will
2.
result in leakage. Please refer to the tightening torque in the table above to fasten the nuts.

4-2 Set refrigerant pipe dimension and joint pipe steps

Piping name
Main pipe
Main piping for indoor unit
Branch piping for indoor unit
Branch manifold assembly
for indoor unit

4.Connecting pipe installation

Burr
Rough
Inclined
Piping connecting position
Pipe from the outdoor unit to the first indoor branch
Pipe after the first indoor manifold and indirectly
connected to the indoor unit
Pipe after the manifold and directly connected
Piping assembly for connecting the main pipe,
main branch piping and branch piping
External diameter
(mm)
Maximum Minimum
Φ6. 4 8. 7
Φ9. 5 12. 4
Φ12. 7 15. 8
Φ15. 9 19. 0
Φ19. 1 23. 3
Piping size
Φ12 . 7
Φ15 . 9
to the indoor unit
7
A
(mm)
8. 3
12. 0
15. 4
18. 6
22. 9
Tightening torque
(N. m)
( mm)
14. 2～17. 2 N. m
Φ6 . 4
( 144～176 kgf. cm)
32. 7～39. 9 N. m
Φ9 . 5
( 333～407 kgf. cm)
49. 5～60. 3 N. m
( 504～616 kgf. cm)
61. 8～75. 4 N. m
( 630～770 kgf. cm)
97 . 2～118 . 6 N. m
Φ19 . 1
( 1115～1364 kgf. cm)
Code
L 2
a b
, ,
A B
,
L 1
L 5
~
c d e f
, , ,
C D E
, , ,
V.1