Panasonic R410A service manual Specifications, Flaring Procedure with a Flare Tool, Fig

1. Specifications

8. HOW TO INSTALL THE TIMER WIRED REMOTE CONTROLLER

NOTE

Refer to the Instraction Manual attaehed to the Timer Remote Controller.

1

1-13. 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 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. 1-110 and 1-111)

NOTE

When reaming, hold the tube end downward and be sure that no copper scraps fall into the tube. (Fig. 1-111)

(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. 1-112)

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 After

Fig. 1-110

Copper tubing

Reamer

Fig. 1-111

Flare nut

Copper tubing

Flare tool

Fig. 1-112

1-118