Free match split type air conditioner / Installation Manual
23 / 44 EN
Step 4: Connect pipes
Connect the copper pipes to the indoor unit first, then connect it to the outdoor unit. You should first
connect the low-pressure pipe, then the high-pressure pipe.
1. When connecting the flare nuts, apply a thin coat of refrigeration oil to the flared ends of the pipes.
2. Align the center of the two pipes that you will connect.
Indoor unit tubing
Flare nut
Pipe
Fig. 7.6
3. Tighten the flare nut as tightly as possible by hand.
4. Using a spanner, grip the nut on the unit tubing.
5. While firmly gripping the nut, use a torque wrench to tighten the flare nut according to the torque
values in table 7.1.
C
Note:
Use both a spanner and a torque wrench when connecting or disconnecting pipes
to/from the unit.
Fig. 7.7
A
Warning:
•
Ensure to wrap insulation around the piping. Direct contact with the bare piping may
result in burns or frostbite.
•
Make sure the pipe is properly connected. Over tightening may damage the bell
mouth and under tightening may lead to leakage.
7
Refrigerant piping connection