Panasonic 26PEK2U6 26PEK2U6 Service Manual - Page 120
HOW TO PROCESS TUBING, Connecting the Refrigerant Tubing, Use of the Flaring Method
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4-4. HOW TO PROCESS TUBING The liquid tubing side is connected by a flare nut, and the gas tubing side is connected by brazing. 1. Connecting the Refrigerant Tubing Use of the Flaring Method Many 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. 12 - 20 in. longer than the tubing length you estimate. (2) Remove burrs at each end of the copper tubing with 1 a tube reamer or file. This process is important and should be done carefully to make a good flare. Be sure to keep any contaminants (moisture, dirt, metal filings, etc.) from entering the tubing. (Figs. 1-14 and 1-15) NOTE When reaming, hold the tube end downward and be sure that no copper scraps fall into the tube. (Fig. 1-15) (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 the copper tube with a flare tool. (Fig. 1-16) NOTE A good flare should have the following characteristics: inside surface is glossy and smooth edge is smooth tapered sides are of uniform length 1. Specifications Before Deburring After Fig. 1-14 Copper tubing Reamer Fig. 1-15 Flare nut Copper tubing Flare tool Fig. 1-16 1-112