Mitsubishi Electric MFZ-KA09NA Manual De Instalación página 5

2-4. FLARE CONNECTION No g o o d
1) Cut the copper pipe as straight as possible with a pipe cutter. (Fig. 1, 2) Good 9. g90
2) Remove all burrs from the cut section of the pipe, ensuring that precautions are Copper al " : '
taken to avoid getting metal shavings into the piping. (Fig. 3) oe pipe "a g r4
3) Remove flare nuts attached to indoor and outdoor units, then put them on pipe. Sk HE an
4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension shown in the ZB oe " =
table. Select A inch (mm) from the table according to the tool you use. . Tilted Uneven Burred
Fig. 1 Fig. 2
5) Check
* Compare the flared work with Fig. 6.
¢ If flare is defective, cut off the section and repeat procedure. Flaring tool
Burr copper pipe 3
Pipe
Ainch (mm)
Tightening torque
x
_Spare reamer
,
; Nut 7 Pi 72\SPipe cutter BET | \
diameter inch | Clutch type | Clutch type | Wing nut ftelb Py ld
inch (mm) tool tool type tool Nem (kgfeom) :
(mm) for R410A | for R22 | for R22 g Kia 3 Ketch type Wing nut ype Fig. 4
Ig. ig.
@ 1/4 1/4 43.71017.7 10 to 13
(6.35) | G7) 0.06 to 0.08 (140 to 180) Inside i s shi
@ 3/8 3/8
(1.5 to 2.0)
25 to 30
A
Insi eis st in-
(9.52) | (22) | 0 to0.02 [0.04 to 0.06 34:3 1049-21 (360 to 420) sound seratches.
1/2 | 1/2 | (0to9.5) | (1.0 to 1.5) 36 to 42 ta
(12.7) _| (26)
0.08 to 0,101 4-0 © 584 | (500 to 575)
ie"
ck CoPPEr pe s
(
6 5/8
5/8
(2.0 to 2.5)
5A to 58
wy Even length
(15.88} | (29) 73.5 to 78.4 (750 to 800) Elare 'nut | all around
Fig. 5 Fig. 6
2-5. PIPE CONNECTION
* Fasten flare nut with a torque wrench as specified in the table (refer to 2-4.).
« When fastened too tight, flare nut may eventually break and cause refrigerant leakage.
Indoor unit connection
Connect both liquid and gas pipings to indoor unit.
¢ Apply a thin coat of refrigerant oil (J) on the seat surface of pipe.
« To connect, first align the center, then tighten the first 3 to 4 turns of flare nut.
¢ Use tightening torque table above as a guideline for indoor unit side joints, and tighten using two wrenches. Excessive
tightening damages the flare section.
Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit following the same procedure detailed in Indoor unit connection.
* For tightening, use a torque wrench or spanner.
A WARNING
When installing the unit, securely connect the refrigerant
pipes before starting the compressor.
2-6. INSULATION AND TAPING
1) Cover piping joints with pipe cover.
2) For outdoor unit side, insulate the piping, including valves.
3) Apply piping tape (G) starting from the connection on the outdoor unit.
« When piping has to be installed through a ceiling, closet or where the temperature and humidity are high, use additional field-supplied insulation to prevent
condensation.
2-7. PIPE FORMING AND INSTALLATION
Connecting Pipe Installation
¢ Install the connecting pipes so that the piping can move slightly to the front, back, left, and right.
RIGHT DOWNWARD PIPING OTHER PIPING LEFT OR LEFT-REAR PIPING
¢ Bundle the connecting pipes and drain hose together, and then wrap them in
felt tape (11).
¢ Route the conduit pipe above and along the drain hose.
¢ There are conduit pipes that the left or left-rear piping connection cannot be
performed.
Pipe cover (4)
Wrap the felt tape
(11) tightly around K
the pipes and hose
starting near where
the pipes and hose
are routed from the
Start wrapping the piping
tape (G) around the pipes
and hose 3/8 in. (10 mm)
inside the indoor unit.
indoor unit. (The
overlap width of
the felt tape (11)
should not be more
cover. than 1/2 of the tape ~
width.) / Make sure that the drain hose
Fasten the end of the
felt tape (11) with a
po cee bandage stopper.
Remove the
Felt tape (1 1) is not routed upward.
* Be sure to insulate the connecting pipes and place them near the rear of the indoor unit so that they do not contact the front panel.
* Be careful not to crush the connecting pipes when bending them.
Cut and use the lower side panels on the left and right sides of the indoor unit as shown below.
Smooth the cut edges of the side panels so that they will not damage the insulation coating.
« Installing flush against a ¢ For left or right piping
wall with molding
Cut the lower side panels to match the
height of the molding.
En-4