When cutting the tubing, use a tube cutter, and be
sure to remove any burrs.
(The same applies to distribution tubing (optional).)
When bending the tubes, bend each tube using a
radius that is at least 4 times the outer diameter of
the tube.
When bending, use sufficient care to avoid crushing
or damaging the tube.
For flaring, use a flare tool, and be sure that flaring is
performed correctly.
Use sufficient caution during preparation of the tubing.
Seal the tube ends by means of caps or taping to
prevent dust, moisture, or other foreign substances
from entering the tubes.
Except for 70 type, use the supplied connector tub-
ing. (See figure below.)
Refrigerant tubing
Connection
method
Use supplied
connector tube?
Suction tube
Brazed connection
Yes (ø19.05 ø22.22)
Discharge tube
Brazed connection
Yes (ø15.88 ø19.05)
Liquid tube
Brazed connection
No
Balance tube
Flared connection
No
70 type (8 horsepower)
90 type (10 horsepower)
The tubing can be routed out either from the front or
from the bottom. (Fig. 4-15)
The connecting valve is contained inside the unit.
Therefore, remove the front panel. (Fig. 4-15)
(1) If the tubing is routed out from the front, use cutting
pliers or a similar tool to cut out the tubing outlet slit
(part indicated by ) from the tubing cover.
(Figs. 4-15 and 4-16)
Fig. 4-15
(2) If the tubing is routed out from the bottom, remove the
slit part ( ).
Use a drill bit approximately 5 mm dia. to create holes
at the 4 slit hole indentations (openings).
Be careful not to damage the base plate.
Fig. 4-16
Material: Use C1220 phosphorous deoxidized copper
as described in JIS H3300, “Copper and Copper Alloy
Seamless Pipes and Tubes.”
(For tubes that are ø25.4 or larger, use 1/2H material
or H material. For all others use O material.)
Tubing size
Use the tubing size indicated in the following table.
Remove
11 panel
screws from
front panel
Use cutting pliers or similar
tool to cut cover out
Front
Bottom
Remove 2 screws
Tubing cover
Indentation
(4 locations)
Slit hole
4-12. Routing the Tubing
4-13. Prepare the Tubing
Punch out the slit part ( ).
CAUTION
4-14. Connect the Tubing
1
2
3
4
Refrigerant tubing
Connection
method
Use supplied
connector tube?
Suction tube
Brazed connection
Discharge tube
Brazed connection
Liquid tube
Brazed connection
No
Balance tube
Flared connection
No
No
No
1
2
3
4
Refrigerant tubing (Existing tubing can be used.)
Tubing size (mm)
Outer dia. Thickness Outer dia. Thickness
ø6.35 t0.8 ø25.4 t1.0
ø9.52 t0.8 ø28.58 t1.0
ø12.7 t0.8 ø31.8 t1.1
ø15.88 t1.0 ø38.1 t1.15
ø19.05 t1.0 ø41.28 t1.2
ø22.22 t1.15
2-40
Design of 3-WAY ECO-i SYSTEM
1
2
3
4
5
6
7
8
4. Installation Instructions
TD831143-00W-3WAY.indb40TD831143-00W-3WAY.indb40 2008/12/0116:15:502008/12/0116:15:50