Mitsubishi 864810 User Manual

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En-5

3-2.PIPECONNECTION

1)Applyathincoatofrefrigerationoil(G)tothearedendsofthepipesand

the pipe connections of the outdoor unit.

2) Align the center of the pipe with that of the pipe connections of the outdoor

unit,thenhandtightenthearenut3to4turns.

3)Tightenthearenutwithatorquewrenchasspeciedinthetable.

• Over-tighteningmaycausedamagetothearenut,resultinginrefrigerant

leakage.

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

piping may result in burns or frostbite.

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attached).

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

the temperature and humidity are high, wind additional commercially sold

insulationtopreventcondensation.

WARNING

When installing the unit, securely

connect the refrigerant pipes before

starting the compressor.

CAUTION

When there are the ports which are

not used, make sure their nuts are

tightened securely.

Fig. 1 Fig. 2 Fig.3

Fig. 4 Fig. 5 Fig. 6

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

Copper

pipe

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)

• Aimthecopperpipedownwardwhileremovingburrsto

preventburrsfromdroppinginthepipe.

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 selected.

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.

4-1.PURGINGPROCEDURESANDLEAKTEST

1)Removeserviceportcapofstopvalveonthesideoftheoutdoorunitgaspipe.

(Thestopvalvesarefullyclosedandcoveredincapsintheirinitialstate.)

2)Connectgaugemanifoldvalveandvacuumpumptoserviceportofstopvalve

on the gas pipe side of the outdoor unit.

3)Runthevacuumpump.(Vacuumizeformorethan15minutes.)

4)Checkthevacuumwith gaugemanifoldvalve,thenclosegaugemanifold

valve,andstopthevacuumpump.

5)Leaveasitisforoneortwominutes.Makesurethepointerofgaugemanifold

valveremainsinthesameposition.Conrmthatpressuregaugeshows

–14.7

psi [Gauge] (

–0.101 MPa).

6)Removegaugemanifoldvalvequicklyfromserviceportofstopvalve.

7)Fully open allstopvalves on the gaspipeand the liquid pipe.Operating

without fully opening lowers the performance and this causes trouble.

8)Referto1-2.,andchargetheprescribedamountofrefrigerantifneeded.Be

sure to charge slowly with liquid refrigerant. Otherwise, composition of the

refrigerant in the system may be changed and affect performance of the air

conditioner.

9)Tightencapofserviceporttoobtaintheinitialstatus.

)Leaktest

Gauge mani-

foldvalve(for

R410A)

Compound pressure

gauge (for R410A)

–14.7 psi

(–0.101MPa)

Handle

Low

HandleHigh

Vacuumpump

(for R410A)

Charge hose

(for R410A)

*Close

*Open

Hexagonalwrench

*4 to 5 turns

Stopvalve

forLIQUID

Pressure gauge

(for R410A)

Precautions when us-

ingthecontrolvalve

Whenattachingthecontrolvalve

totheserviceport,valvecoremay

deform or loosen if excess pres-

sure is applied. This may cause

gasleak.

Serviceport

Charge hose

(for R410A)

Body

Open

Controlvalve

Whenattachingthecontrolvalveto

theserviceport,makesurethatthe

valvecoreisinclosedposition,and

then tighten part A. Do not tighten

partA or turnthebodywhenvalve

core is in open position.

Pipe diameter

[inch (mm)]

B

[inch (mm)]

A [inch (mm)] Tightening torque

Clutch type tool for R410A Clutch type tool for R22 Wing nut type tool for R22 ft-Ib N•m kgf•cm

1/4(ø6.35) 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 13.7to17.7 140 to 180

3/8(ø9.52) 7/8(22) 25to30 34.3to41.2 350to420

1/2(ø12.7) 1-1/32(26)

0.08 to 1.0

(2.0 to 2.5)

36to42 49.0 to 56.4 500 to 575

5/8(ø15.88) 1-5/32(29) 54 to 58 73.5to78.4 750 to 800

Stopvalvecap

(Torque 15 to

22 ft-lb, 19.6 to

29.4N•m,200

to300kgf•cm)

Serviceportcap

(Torque 10to13ft-lb,

13.7to17.7N•m,140

to180kgf•cm)

Stopvalve

for GAS

4. PURGINGPROCEDURES,LEAKTEST,ANDTESTRUN

3. FLARINGWORKANDPIPECONNECTION

WG79A686H01_en.indd 5 11/24/2015 9:04:55 AM

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Mitsubishi 864810 Triple Zone M Series Mini Split System with Cooling 24000 BTU, Two 6k BTU Indoor, One 12k BTU Indoor, PACMKA31BC Branch Box, and an Outdoor Unit

User Manual - Page 6