Sanyo ECO R410A - Manual (Page 25)

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3. Cutting and Flaring of Liquid Tube
After determining the position for installation, cut the liquid tube and flare the connecting portion.
(Pay attention to the notes below when flaring the tubes.)
NOTE
• After cutting the tube, deburr and finish the end face smoothly and correctly.
• Do not damage tubes while flaring.
• Take care not to allow dirt and deburred chips into the tube.
• Use the flare nut which came with External Electronic Expansion Valve Kit.
• The flaring dimensions for R410A are different from the conventional dimensions for R407C and R22. For R410A,
the specially created flaring tool is recommended. However a conventional tool can be used by adjusting the
amount of copper tube projection as shown in the table below.
4. Connection of External Electronic Expansion Valve with Tubing
In connection with tubing, take care to fit the external electronic expansion valve in the right direction.
Be sure to install with the
mark on the label pointing upwards. Also when connecting the flare, use the arrow
marks on the label to check the directions of the indoor unit side and outdoor unit side.
(The wiring outlet side faces the indoor unit.) (Refer to Fig. 3-54.)
• Tightening flare nuts
CAUTION
Be sure to use 2 spanners together when removing or tightening
the flare nuts. After connection with the tubing, tighten the flare
nuts by the correct torque. Failure to tighten the nuts correctly
can cause loosening and damage on the flared portion, resulting
in accidents by oxygen deficiency due to refrigerant leaks.
MUST BE INSTALLED AS ARROWS.
SERIAL NO.
SOURCE
EXTERNAL ELECTRONIC EXPANSION VALVE KIT
Do not e
xceed
10 deg
rees
Do not e
xceed
10 deg
rees
DC 12V
UP
INDOOR
SIDE
OUTDOOR
SIDE Do not e
xceed
10 deg
rees
Do not e
xceed
10 deg
rees
Attached label on the unit
85421360XXXXXX
Fig. 3-54
Tubing size Tightening torque
1/4" (Ø6.35)
120 - 160 lbs inch
(140 - 180 kgf cm)
3/8" (Ø9.52)
300 - 360 lbs inch
(340 - 420 kgf cm)
Rigid (clutch type)
R410A R407C, R22
If special R410A
tool is used If conventional
tool is used If conventional
tool is used
B = 0 - 1/64 3/64 - 1/16 0 - 1/64
Unit : in.
B
Copper tube projection for flaring: B (in.)
Fig. 3-53