30
Corrugated Cutting
Wrap Cuttin
g
CONNECTING REFRIGERANT PIPING LINES (Cont.)
16-10 STEPS OF PREPARING REFRIGERANT PIPING LINES BEFORE CONNECTIONS
( IN CASE OF NOT USING THE OPTIONAL FACTORY REFRIGERANT PIPING LINES WITH THE FLARE NUTS )
STEP (1): Cutting refrigerant piping lines
•
Remove protective caps from copper pipe ends.
•
Position tube end downwards, cut the pipe to the
required length with a pipe cutter.
NOTE
•
Take care to ensure that the cut edge remains at a
90° angle with the side of pipe, and refer to the
illustrations for examples of edges cut correctly
and incorrectly.
STEP (2): Removing burrs at the ends
of refrigerant piping lines
with a reamer
This process is important and should be done
carefully to make a good flare and to prevent any
gas leaking out.
NOTE
When reaming, hold the pipe end downward and
be sure that no copper scraps fall into the pipe.
STEP (3): Mounting flare nuts on the ends
of refrigerant piping
•
Mount gas flare nut ( large nut ) on the end of gas
refrigerant piping line.
•
Mount liquid flare nut ( small nut ) on the other
side of liquid refrigerant piping line.
STEP (4): Flaring the Piping
•
Use flare tool to flare ends of both gas and liquid
piping lines and then slide a flare nut on to the
tube and modify the flare.
NOTES
1) Good flare should have the following properties :
•
Inside surface is glossy and smooth.
•
Edge is smooth and must not have any burrs
or imperfections.
•
Tapered sides are of uniform length.
2) Be sure to apply a sealing cap or waterproof tape
to prevent dust or water from getting into the
refrigeration piping lines before they are used.
Debarring
After
Before
Pipe Cutter
Correct Cutting
Inclined Cutting
90°
1
2
1: Connection pipes
2: Reamer
Liquid
Piping Line
Gas
Piping Line
Recommend
Flare tool
Refrigerant
Piping
Flare Nut
Ø
A (+0
÷
–0.4)
1/4” 6.35 mm
9.1 mm
1/2” 12.7 mm
16.6 mm
5/8” 15.9 mm
19.7 mm
Summary of Contents for 38QPCT18C-708
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