Mitsubishi MXZ-2B20NA-1 INSTALLATION INSTRUCTIONS

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3. FLARING WORK AND PIPE CONNECTION

3-1. FLARING WORK

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arenutsattachedtoindoorandoutdoorunits,thenputthem

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

afteraringwork.)

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

showninthetable.SelectAinch(mm)fromthetableaccordingtothe

toolyouuse.

5)Check

• ComparethearedworkwithFig.6.

• Ifareisnotedtobedefective,cutoffthearedsectionanddo

aringworkagain.

3-2. PIPE CONNECTION

• Fastenarenutwithatorquewrenchasspeciedinthetable.

• Whenfastenedtootight,arenutmaybrakeafteralongperiodand

cause refrigerant leakage.

• Be sure to wrap insulation around the piping. Direct contact with the

barepipingmayresultinburnsorfrostbite.

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-

ing

withoutany

scratches.

Clutchtype

Flaring tool

Wingnuttype

Copper

pipe

Uneven Burred

3-3. INSULATION AND TAPING

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.

WARNING

When installing the unit, securely connect the refrigerant

pipes before starting the compressor.

Flare nut

Die

Copper

pipe

Pipe diameter

inch(mm)

Ainch(mm) Tightening torque

Clutchtypetool

for

R410A

Clutchtypetool

for R22

Wingnuttypetool

for R22

ft-lb(kgf•cm)

N•m

1/4(6.35) 21/32(17)

0 to 0.02

(0to0.5)

0.04 to 0.06

(1.0to1.5)

0.06 to 0.08

(1.5to2.0)

10to13(140to180) 13.7 to 17.7

ø3/8(9.52) 7/8(22) 25to30(350to420) 34.3 to 41.2

ø1/2(12.7) 1-1/32(26)

0.08 to 0.10

(2.0to2.5)

36to42(500to575) 49.0 to 56.4

ø5/8(15.88) 1-5/32(29) 54to58(750to800) 73.5 to 78.4

JG79A253H04_en.indd 6 2014/03/10 14:12:57

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Mitsubishi MXZ-2B20NA-1 20k BTU - M-Series Outdoor Condenser - For 2 Zones

INSTALLATION INSTRUCTIONS - Page 6