45MAHAQ: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
22
10. Piping:
a. Cut the pipe, with a pipe cutter, at 90 degrees (see Fig. 33).
b. Remove the service connection (if provided with the unit).
Fig. 33 — Pipe Cutting
c. Remove all the burrs from the cut cross section of the pipe
avoiding any burrs inside the tubes.
d. Remove the flare nuts attached to the indoor and outdoor units.
e. Install the correct size flare nut onto the tubing and make the
flare connection. Refer to Table 9 for the flare nut spaces.
Table 9 — Flare Nut Spacing
Fig. 34 — Flare Nut Spacing
f. Apply a small amount of refrigerant oil to the flare connection
on the tubing.
g. Align the center of the pipes and/or service valve.
Fig. 35 — Align Pipe Center
h. Connect both the liquid and gas piping to the indoor unit
i. Tighten the flare nut using a torque wrench as specified in
Table 10.
Table 10 — Tightening Torque
Fig. 36 — Tighten the Flare Nut
OUTER DIAM. (MM)
A (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)
Ø 5/8” (15.88) 0.09 (2.2) 0.08 (2.0)
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Brass Flare Size
Recommended Seating Torque
for Brass Flare Nuts
N-m
Ø1/4 8-10 Ft. - Lbs. 10.8 to 13.6
Ø3/8 15-18 Ft. - Lbs. 20.3 to 24.4
Ø1/2 28-32 Ft. - Lbs. 38.0 to 43.4
Ø5/8 38-42 Ft. - Lbs. 51.5 to 56.9
Ø3/4 50-55 Ft. - Lbs. 68.0 to 74.6
Indoor unit tubing Flare nut Piping
To Next Page
Loading...
