Fujitsu AOU48RLXFZ1 - Page 15

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Flaring5. 3. 1.
Usespecialpipecutterandaretoolexclusive•
for R410A.
(1) Cut the connection pipe to the necessary
length with a pipe cutter.
(2) Hold the pipe downward so that the cuttings
will not enter the pipe and remove any burrs.
(3)
Insertthearenut(alwaysusethearenut
attached to the indoor and outdoor units
respectively) onto the pipe and perform the
areprocessingwithaaretool.Leakageof
refrigerantmayresultifotherarenutsareused.
(4) Protect the pipes by pinching them or with
tape to prevent dust, dirt, or water from
entering the pipes.
Checkif[L]isareduniformly
and is not cracked or scratched.
B
L
Pipe
A
Die
Pipe outside
diameter
[mm (in.)]
Dimension A (mm (in.))
Dimension B
0
- 0.4
[mm (in.)]
Flare tool for R410A,
clutch type
6.35 (1/4)
0 to 0.5
(0 to 0.02)
9.1 (11/32)
9.52 (3/8) 13.2 (17/32)
12.70 (1/2) 16.6 (21/32)
15.88 (5/8) 19.7 (25/32)
Whenusingconventionalaretoolstoare•
R410A pipes, the dimension A should be
approximately 0.5mm (0.02in.) more than
indicatedinthetable(foraringwithR410A
aretools)toachievethespeciedaring.Use
a thickness gauge to measure the dimension A.
Pipe outside
diameter
[mm (in.)]
Width across ats
of Flare nut
[mm (in.)]
6.35 (1/4) 17 (21/32)
9.52 (3/8) 22 (7/8)
12.70 (1/2) 26 (1-1/32)
15.88 (5/8) 29 (1-5/32)
Widthacrossats
Bending pipes5. 3. 2.
CAUTION
To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of curvature of 100mm (4in.) or •
more.
If the pipe is bent repeatedly at the same place, it will break.•
If pipes are shaped by hand, be careful not to collapse them.•
Do not bend the pipes at an angle of more than 90°.•
Whenpipesarerepeatedlybentorstretched,thematerialwillharden,makingitdifculttobendorstretchthemanymore.•
Do not bend or stretch the pipes more than 3 times.•
Pipe connection5. 3. 3.
CAUTION
Be sure to install the pipe against the port on the indoor unit and the outdoor unit correctly. If the centering is •
improper,thearenutcannotbetightenedsmoothly.Ifthearenutisforcedtoturn,thethreadswillbedamaged.
Donotremovethearenutfromtheoutdoorunitpipeuntilimmediatelybeforeconnectingtheconnectionpipe.•
After installing the piping, make sure that the connection pipes do not touch the compressor or outer panel. If the •
pipes touch the compressor or outer panel, they will vibrate and produce noise.
(1) Detach the caps and plugs from the pipes.
(2) Center the pipe against the port on the outdoor unit, and
thenturnthearenutbyhand.
(3)Tightenthearenutoftheconnectionpipeatthe
outdoor unit valve connector.
(4)
Aftertighteningthearenutbyhand,useatorque
wrench to fully tighten it.
3-way valve (Liquid)
3-way valve (Gas)
Flare nut
Connection pipe
(Liquid)
Flare nut
Connection pipe
(Gas)
9379069342-02_IM.indb 15 17/5/2556 11:49:42