Troy-Bilt MXZ-3A30NA ユーザーズマニュアル

7

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Pipe diameter

[mm (inch)]

Nut

(mm)

A [mm (inch)]

Tightening torque

Clutch type tool

for R410A

Clutch type tool

for R22

Wing nut type tool

for R22

N•m

kgf•cm

ft·Ib

ø6.35 (1/4)

17

0 to 0.5

(0. to 0.02)

1.0 to 1.5

(0.04 to 0.06)

1.5 to 2.0

(0.06 to 0.08)

13.7 to 17.7

140 to 180

10 to 13

ø9.52 (3/8)

22

34.3 to 41.2

350 to 420

25 to 30

ø12.7 (1/2)

26

2.0 to 2.5

(0.08 to 1.0)

49.0 to 56.4

500 to 575

36 to 42

ø15.88 (5/8)

29

73.5 to 78.4

750 to 800

54 to 58

Tilted Uneven Burred

Good

No good

Burr

Copper pipe

Spare reamer

Pipe cutter

Smooth all
around

Even length
all around

Inside is shin-

ing without any
scratches.

Flare nut

Die

Copper pipe

Clutch type

Flaring tool

Wing nut type

•  Fasten flare nut with a torque wrench as specified in the table.

•  When fastened too tight, flare nut may brake after a long period and

cause refrigerant leakage.

Connect pipes to stop valve pipe joint of the outdoor unit in the same
manner applied for indoor unit.

•  For tightening, use a torque wrench or spanner and use the same

tightening torque applied for indoor unit.

1) Cover piping joints with pipe cover.

2) For outdoor unit side, surely insulate every piping including valves.

3) Using piping tape (E), apply taping starting from the entry of outdoor

unit.

•  Stop the end of piping tape (E) with tape (with adhesive agent at-

tached).

•  When piping have to be arranged through above ceiling, closet or

where the temperature and humidity are high, wind additional com-

mercially sold insulation to prevent condensation.

Copper
pipe

1) Cut the copper pipe correctly with pipe cutter. (Fig. 1, 2)

2) Completely remove all burrs from the cut cross section of pipe. (Fig. 3)

•  Put the end of the copper pipe to downward direction as you

remove burrs in order to avoid to let burrs drop in the piping.

3) Remove flare nuts attached to indoor and outdoor units, then put them

on pipe having completed burr removal. (Not possible to put them on

after flaring work.)

4) Flaring  work  (Fig.  4,  5).  Firmly  hold  copper  pipe  in  the  dimension

shown  in  the  table.  Select  A  mm  from  the  table  according  to  the  tool

you use.

5) Check

•  Compare the flared work with Fig. 6.

•  If flare is noted to be defective, cut off the flared section and do

flaring work again.

SG79Y871H02.indb   7

9/7/2007   1:09:41 PM