Mitsubishi Electronics MXZ-2B20NA Air Conditioner User Manual


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6
3. FLARING WORK AND PIPE CONNECTION
3-1. FLARING WORK
Pipe diameter
>PPLQFK@
Nut
PP
$>PPLQFK@ Tightening torque
&OXWFKW\SHWRRO
for R410A
&OXWFKW\SHWRRO
for R22
:LQJQXWW\SHWRRO
for R22
N•m kgf•cm ft·Ib
¡ 17
0to0.5
WR
1.0 to 1.5
WR
1.5 to 2.0
WR
13.7 to 17.7 140 to 180 10 to 13
¡ 22 34.3 to 41.2 350 to 420 25 to 30
¡ 26
2.0 to 2.5
WR
49.0 to 56.4 500 to 575 36 to 42
¡ 29 73.5 to 78.4 750 to 800 54 to 58
&XWWKHFRSSHUSLSHFRUUHFWO\ZLWKSLSHFXWWHU)LJ
&RPSOHWHO\UHPRYHDOOEXUUVIURPWKHFXWFURVVVHFWLRQRISLSH)LJ
 3XWWKHHQGRIWKHFRSSHUSLSHWRGRZQZDUGGLUHFWLRQDV\RX
remove burrs in order to avoid to let burrs drop in the piping.
5HPRYHÀDUHQXWVDWWDFKHGWRLQGRRUDQGRXWGRRUXQLWVWKHQSXWWKHP
on pipe having completed burr removal. (Not possible to put them on
DIWHUÀDULQJZRUN
)ODULQJZRUN)LJ)LUPO\KROGFRSSHUSLSHLQWKHGLPHQVLRQ
shown in the table. Select A mm from the table according to the tool
\RXXVH
&KHFN
 &RPSDUHWKHÀDUHGZRUNZLWK)LJ
 ,IÀDUHLVQRWHGWREHGHIHFWLYHFXWRIIWKHÀDUHGVHFWLRQDQGGR
ÀDULQJZRUNDJDLQ
3-2. PIPE CONNECTION
 )DVWHQÀDUHQXWZLWKDWRUTXHZUHQFKDVVSHFL¿HGLQWKHWDEOH
 :KHQIDVWHQHGWRRWLJKWÀDUHQXWPD\EUDNHDIWHUDORQJSHULRGDQG
cause refrigerant leakage.
Outdoor unit connection
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.
Fig. 1 Fig. 2
Fig. 3 Fig. 4
Fig. 5 Fig. 6
Tilted
Good
No good
Burr
Copper pipe
Spare reamer
Pipe cutter
Smooth all
around
Even length
all around
Inside is shin-
LQJZLWKRXWDQ\
scratches.
Flare nut
Die
Copper pipe
&OXWFKW\SH
Flaring tool
:LQJQXWW\SH
Copper
pipe
Uneven Burred
3-3. INSULATION AND TAPING
&RYHUSLSLQJMRLQWVZLWKSLSHFRYHU
)RURXWGRRUXQLWVLGHVXUHO\LQVXODWHHYHU\SLSLQJLQFOXGLQJYDOYHV
8VLQJSLSLQJWDSH(DSSO\WDSLQJVWDUWLQJIURPWKHHQWU\RIRXWGRRU
unit.
 6WRSWKHHQGRISLSLQJWDSH(ZLWKWDSHZLWKDGKHVLYHDJHQWDW-
WDFKHG
• When piping have to be arranged through above ceiling, closet or
ZKHUHWKHWHPSHUDWXUHDQGKXPLGLW\DUHKLJKZLQGDGGLWLRQDOFRP
-
PHUFLDOO\VROGLQVXODWLRQWRSUHYHQWFRQGHQVDWLRQ
WARNING
When installing the unit, securely connect the refrigerant
pipes before starting the compressor.
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