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3-4. Prepare the Tubing
● Material: Use seamless phosphorous deoxidized copper
tube for refrigeration. Wall thickness shall comply with the
applicable legislation. The minimal wall thickness must be
in accordance with the table below. For tubes of ø22.22 or
larger, use the material of temper 1/2H or H (Hard copper
tube). Do not bend the hard copper tube.
● Tubing size
Use the tubing size indicated in the table below.
● When cutting the tubing, use a tube cutter, and be sure to
remove any burrs.
The same applies to distribution tubing (optional).
● When bending the tubes, bend each tube using a radius
that is at least 4 times the outer diameter of the tube. When
bending, use sufficient care to avoid crushing or damaging
the tube.
● For flaring, use a flare tool, and be sure that flaring is
performed correctly.
CAUTION
Use sufficient caution during preparation of the tubing.
Seal the tube ends by means of caps or taping to prevent
dust, moisture, or other foreign substances from entering
the tubes.
Refrigerant tubing
Tubing size (mm)
Material Temper - O
(Soft copper tube)
Outer dia.
Thickness
ø6.35
t0.8
ø9.52
t0.8
ø12.7
t0.8
ø15.88
t1.0
ø19.05
t1.2
3-5. Connect the Tubing
● When operating the refrigerant tube installation in the
field, do not apply the flame of welding to the surrounding
sheet-metal parts. If necessary, use a wet rag to prevent
overheating of the heat exchanger.
● Use the supplied connector tubing.
8 HP
4
Refrigerant
1
3
2
Suction tube
1
2 Discharge tube
Liquid tube
3
Balance tube
4
Material Temper - 1/2 H, H
(Hard copper tube)
Outer dia.
Thickness
ø22.22
ø25.4
ø28.58
ø31.75
ø38.1
over t1.35
ø41.28
over t1.45
Connection
tubing
method
connector
Brazing
Flare
Flare
Flare
10/12 HP
10/12 HP
3
Supplied
tube
Supplied
14 HP
14 HP
3
Supplied tube
Supplied tube
16 HP
16 HP
3
t1.0
t1.0
t1.0
t1.1
Supplied
tube
Supplied
tube
In case of 10/12 HP
Use
Supplied
tube?
No
No
No
No
27
4
Refrigerant
1
tubing
2
4
1 Suction tube
1
2
3
Discharge
2
tube
Liquid tube
3
tube
Balance
4
tube
4
Refrigerant
1
tubing
2
4
1
1 Suction tube
2
3
Discharge
2
tube
Liquid tube
3
Balance
4
tube
4
Refrigerant
1
tubing
2
4
1
2
1 Suction tube
3
Discharge
2
tube
Liquid tube
3
Balance
4
tube
Flaring process to the tip of the
supplied tubes
Remove flare nuts attached to the service
valve and reuse them.
Note: Make sure the service valve is
completely closed.
If not, the gas leak will be occurred.
Use the wide area of the outer tubing
surface of the supplied tubes.
• Supplied tubing outer diameter ø19.05
• Local tubing inner diameter ø19.05
Unit: mm
Use
Connection
Supplied
connector
method
tube?
Brazing
No
Service valve
Yes
mounted on the
ø15.88
unit side: Flare
Flare
↓
connection
Tubing side:
ø19.05
Brazing
Brazing
Flare
No
Flare
No
Unit: mm
Use
Connection
Supplied
connector
method
tube?
Brazing
No
Yes
Brazing
ø19.05
→ø22.22
Flare
No
Flare
No
Unit: mm
Use
Connection
Supplied
connector
method
tube?
Yes
Brazing
ø25.4
→ø28.58
Yes
Brazing
ø19.05
→ø22.22
Flare
No
Flare
No
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