3-4. Prepare The Tubing - Panasonic U-72MF2U9 Installation Instructions Manual

3-4. Prepare the Tubing

● Material: Use C1220 phosphorous deoxidized copper as described in JIS H3300, "Copper and copper alloy seamless pipes and
tubes".
● 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
3-5. Connect the Tubing
● Use the supplied connector tubing.
Type 72 (6 Ton)
④
①
Refrigerant
tubing
③ ②
Suction tube
1
Discharge tube
2
Liquid tube
3
Balance tube
4
Type 96 (8 Ton)
④
①
Refrigerant
②
tubing
③
Suction tube
1
Discharge tube
2
Supplied
tube
Liquid tube
3
Balance tube
4
In case of type 96
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.
Use Supplied
Connection
connector
method
Brazing
Flare
Flare
Flare
Use Supplied
Connection
connector
method
Brazing
Service valve
ø5/8" (ø15.88)
mounted on the
unit side: Flare
counection
ø3.4" (ø19.05)
Tubing side: Brazing
Flare
Flare
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 ø3/4 (ø19.05)
• Local tubing inner diameter ø3/4 (ø19.05)
Refrigerant tubing (Existing tubing can be used.)
Material: O
Outer diameter
1/4" (6.35)
3/8" (9.52)
1/2" (12.7)
5/8" (15.88)
3/4" (19.05)
Type 120 (10 Ton)
Type 144 (12 Ton)
④
①
tube?
②
③
No
No
No
No
Supplied
tube
tube?
No
Yes
Flare
↓
Brazing
No
No
26
Tubing size (in. (mm))
Material: O
Wall thickness Outer diameter
0.025 (0.635) 7/8" (22.22)
0.030 (0.762) 1-1/8" (28.58)
0.035 (0.889) 1-3/8" (34.92)
0.040 (1.016) 1-5/8" (41.28)
0.042 (1.0668)
Refrigerant Connection
tubing method
Suction tube Brazing
1
Discharge tube Brazing
2
Liquid tube Flare
3
Balance tube Flare
4
Wall thickness
0.045 (1.143)
0.050 (1.27)
0.055 (1.397)
0.060 (1.524)
Unit: in. (mm)
Use Supplied
connector tube?
Yes
ø1" ø1-1/8"
(ø25.4 ø28.58)
Yes
ø3/4" ø7/8"
(ø19.05 ø22.22)
No
No