1-95
1
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 of conventional split system air conditioners employ the flaring method to connect refrigerant tubes that 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. 30 – 50 cm
longer than the tubing length you estimate.
(2)
Remove burrs at each end of the copper tubing with a
tube reamer or a similar tool. 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- 33 and 1- 34)
When reaming, hold the tube end downward and be sure that
no copper scraps fall into the tube. (Fig. 1- 34)
(3) Remove the flare nut from the unit and be sure to mount it
on the copper tube.
After
Before
Deburring
Copper
tubing
Reamer
Fig. 1- 33
Fig. 1- 34
Fig. 1- 35
NOTE
NOTE
(4) Make a flare at the end of the copper tube with a flare tool.
(Fig. 1- 35)
A good flare should have the following characteristics:
inside surface is glossy and smooth
edge is smooth
tapered sides are of uniform length
Flare size: A (mm)
A
Copper tubing
(Outer dia.)
A
0
–
0.4
ø6.35
ø9.52
ø12.7
ø15.88
ø19.05
9.1
13.2
16.6
19.7
24.0
Flare nut
Copper
tubing
Flare tool
<Type E2>
SM830252-01_欧州_Single_8・10HP_TD_SM.indb 95
16/10/14 13:58:13
AMP Air Conditioning
www.ampair.co.uk | [email protected]