International comfort products DLFLFA, Installation Instructions Manual, Page: 10 / 14

10 32801000401
Specifications subject to change without notice.
Fig. 19
-
Wall mount installation
Interconnecting Piping
Flare Connection
1. Cut the pipe with a pipe cutter at 90 degrees.
90
Slanted crude burr
Fig. 20
-
Cut the pipe
2. Remove all the burrs from the cut cross section of the pipe
avoiding any burrs inside the tubes.
3. Remove the flare nuts attached to the indoor and outdoor units.
4. Insert a flare nut into a pipe and flare the pipe. Refer to Table 4
for specifications.
Table 4—Specifications
OUTER DIAM. IN. (MM)
A Dimension IN.(MM)
MAX. MIN.
Ø 1 /4” (6.35) 0.05 (1.3) 0.03 (0.7)
Ø 3 / 8 ” (9.52) 0.06 (1.6) 0.04 (1.0)
Ø 1 / 2 ” (12.7) 0.07 (1.8) 0.04 (1.0)
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
Fig. 21
-
Clamp Handle
5. Apply a small amount of refrigerant oil to the flare connection
on the tubing.
6. Align the center of the pipes.
Indoor unit tubing Flare nut Pipings
Fig. 22 - Align the pipe center
7. Connect both liquid and gas pipings to the indoor unit.
8. Tighten the flare nut using a Torque wrench as specified in the
Table 5.
Table 5—Tightening
PIPE DIAMETER INCH (mm)
TIGHTENING TORQUE
Ft-lb N - m
1/4 (6.35) 10 to 13 13.6 to 17.6
3/8 (9.52) 24 to 31 32.5 to 42.0
1/2 (12.7) 37 to 46 50.1 to 62.3
5/8 (15.88) 50 to 60 67.7 to 81.3
A150712
Fig. 23
-
Tighten
Fig. 24
-
Flare nut and copper tube