Sanyo ECO R410A Installation Instructions Manual page 25

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.
Rigid (clutch type)
R410A
If special R410A If conventional
tool is used tool is used
B = 0 - 1/64
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
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.
R407C, R22
If conventional
tool is used
3/64 - 1/16 0 - 1/64
mark on the label pointing upwards. Also when connecting the flare, use the arrow
Unit : in.
Copper tube projection for flaring: B (in.)
Attached label on the unit
EXTERNAL ELECTRONIC EXPANSION VALVE KIT
SOURCE
DC 12V
SERIAL NO.
INDOOR
SIDE
UP
MUST BE INSTALLED AS ARROWS.
Fig. 3-54
Tubing size
1/4" (Ø6.35)
3/8" (Ø9.52)
25
Fig. 3-53
OUTDOOR
SIDE
85421360XXXXXX
Tightening torque
120 - 160 lbs inch
(140 - 180 kgf cm)
300 - 360 lbs inch
(340 - 420 kgf cm)