How To Process Tubing; Connecting The Refrigerant Tubing; Outdoor Units - Panasonic U-36LE1U6 Installation Instructions Manual

5. HOW TO PROCESS TUBING

5-1. Connecting the Refrigerant Tubing

Use of the Flaring Method
Many of conventional split system air conditioners
employ the flaring method to connect refrigerant tubes
which run between indoor and outdoor units. In this
method, the copper tubes are flared at each end and
connected with flare nuts.
Flaring Procedure with a Flare Tool
(1) Cut the copper tube to the required length with a
tube cutter. It is recommended to cut approx. 1 –
2 ft. longer than the tubing length you estimate.
(2) Remove burrs at the end of the copper tube with a
tube reamer or file.This process is important and
should be done carefully to make a good flare.
(Fig. 5-1)
NOTE
When reaming, hold the tube end downward and be
sure that no copper scraps fall into the tube. (Fig. 5-2)
(3) Remove the flare nut from the unit and be sure to
mount it on the copper tube.
(4) Make a flare at the end of copper tube with a flare
tool. (Fig. 5-3)
NOTE
A good flare should have the following characteristics:
●
inside surface is glossy and smooth
●
edge is smooth
●
tapered sides are of uniform length
Deburring
Before
Fig. 5-1
Fig. 5-2
Flare tool
Fig. 5-3
26
After
Copper
tubing
Reamer
Flare nut
Copper
tubing