Pipe Process Points - Toshiba RAS-07EKH Service Manual

Note:
• Be sure to remove burrs to avoid unevenness on
the flare face which will cause gas leaks.
• Cover the pipe end with a polyethylene bag and
on sheet.
Fig. 3-15
3-2-3. Point of Flaring
(1) The exact length of pipe protruding from the face
of the flare die is determined by the flaring, too.
Fig. 3-16
Note:
• Too long a protrusion of pipe from the flaring tool
will result in too long a flare; If this happens, the
flare nut will not tighten and the joint will not seat.
• Too small a protrusion will cause gas leaks.
CAUTION:
• Too large protrusion of pipe results in impos-
sible tightening of the flare nut.
• Too small a protrusion of pipe will cause gas
leaks due to insufficient flare surface.
• Table 3-1 shows the use of an imperial die and a
rigid die.
Table 3-1
Type of pipe D (mm)
1/4" 6.35
3/8" 9.52
A (mm)
Imperial Rigid
1.3 0.7
1.6 1.0
• Fine flaring work shows even brightness on the
flared surface and uniform thickness of pipe.
• Unsuccessful flaring work causes gas leaks,
therefore rework it.
• The above faulty flaring will cause gas leaks.
3-2-4. Finishing Work
(1) Fix the pipe firmly on the flare die. Match the cen-
ters of both the flare die and the flaring punch,
and tighten flaring punch fully.

3-3. Pipe Process Points

3-3-1. Pipe Bending
(1) Carefully bend by hand.
Note:
• Collapsed pipe cause cooling failure.
(2) Bend with pipe bender. (Since the insulation is
wound on, use the bender by sliding the insula-
tion to one side, or cutting it halfway.)
– 11 –
Fig. 3-17
Fig. 3-18
Fig. 3-19