16
|
Refrigerant piping connection continued
Flare pipe ends continued
Place flaring tool onto the form. Turn the handle of the flaring tool clockwise until the pipe is
fully flared. Remove the flaring tool and flare form, then inspect the end of the pipe for cracks
and even flaring.
Connect pipes
When connecting refrigerant pipes be careful not to use excessive torque
or to deform the piping in any way. You should first connect the low-
pressure pipe, then the high pressure pipe. When bending connective
refrigerant piping, the minimum bend radius is 10 cm.
Connecting pipe to indoor unit
1. Align the center of the two pipes being connected.
2.
Tighten the flare nut as tightly as possible by hand.
3. Using a spanner, grip the nut on the unit pipe.
4.
While firmly gripping the nut on the unit pipe, use a torque wrench to
tighten the flare nut according to the torque values in the table below.
Loosen the flare nut slightly then tighten again. DO NOT use excessive
torque, excessive force can break the nut or damage the refrigerant
piping.
Outer diam. of
pipe (mm)
Tightening torque (N•m)
Flare dimension B
(mm)
Ø 6.35 (Ø 0.25 “)
18~20 (180-200 kgf.cm)
8.4~8.7 (0.33~0.34 “)
Ø 9.52 (Ø 0.375 “) 32~39 (320-390 kgf.cm)
13.2~13.5 (0.52~0.53 “)
Ø 12.7 (Ø 0.5 “)
49~59 (490-590 kgf.cm)
16.2~16.5 (0.64~0.65 “)
Ø 16 (Ø 0.63 “)
57~71 (570-710 kgf.cm)
19.2~19.7 (0.76~0.78 “)
Ø 19 (Ø 0.75 “)
67~101 (670-1010 kgf.cm) 23.2~23.7 (0.91~0.93 “)
Connecting pipe to outdoor unit
1. Unscrew the cover from the packed valve on the side of the outdoor unit.
2. Remove protective caps from ends of valves.
3.
Align flared pipe end with each valve, and tighten the flare nut as tightly as possible by
hand.
4. Using a spanner, grip the body of the valve. Do not grip the nut that
seals the service valve. Over tightening of the flare nut can snap off
other parts of the valve.
5.
While firmly gripping the body of the valve use a torque wrench to
tighten the flare nut according to the torque values above.
6.
Loosen the flare nut slightly then tighten again.
7. Repeat steps 3-6 for the remaining pipe.
Radius
≥
10 cm
Indoor unit pipe
Flare nut
Pipe
3.
4.
R0.4~0.8
90°±4
B
45° ±2
Flare shape
