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Mitsubishi Mr.Slim Series User Manual

Mitsubishi Mr.Slim Series
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7
6. Refrigerant piping work
6.1. Refrigerant pipe
[Fig. 6-1]
øB
øA
Indoor unit
Outdoor unit
Model A B
PEA-M100, 125, 140 ø15.88 ø9.52
Refer to the Instruction Manual that came with the outdoor unit for the restrictions on
theheightdi󰀨erencebetweenunitsandfortheamountofadditionalrefrigerant
charge.
Avoid the following places for installation where air conditioner trouble is liable to
occur.
Where there is too much oil such as for machine or cooking.
Salty environment as seaside areas.
Hot-spring areas.
• Wheresuldegasexists.
Other special atmospheric areas.
• Thisunithasaredconnectionsonbothindoorandoutdoorsides.[Fig. 6-1]
Insulate both refrigerant and drainage piping completely to prevent condensation.
Piping preparation
Refrigerant pipes of 3, 5, 7, 10 and 15 m are available as optional items.
(1)Tablebelowshowsthespecicationsofpipescommerciallyavailable.
Model Pipe
Outside diameter
Min wall
thickness
Insulation
thickness
Insulation
material
mm inch
PEA-
M100,
125, 140
For liquid 9.52 3/8 0.8 mm 8 mm
Heat resisting
foam plastic
0.045specic
gravity
For gas 15.88 5/8 1.0 mm 8 mm
(2)Ensurethatthe2refrigerantpipesarewellinsulatedtopreventcondensation.
(3)Refrigerantpipebendingradiusmustbe10cmormore.
Caution:
Using careful insulation of specied thickness. Excessive thickness prevents
storage behind the indoor unit and smaller thickness causes dew drippage.
6.2. Flaring work
• Maincauseofgasleakageisdefectinaringwork.
Carryoutcorrectaringworkinthefollowingprocedure.
6.2.1. Pipe cutting
[Fig. 6-2-1]
90°
Copper tubes
Tilted
Good
Uneven
No good
Burred
Using a pipe cutter cut the copper tube correctly.
6.2.2. Burrs removal
[Fig. 6-2-2]
Burr
Spare reamer
Copper tube/pipe
Pipe cutter
Completely remove all burrs from the cut cross section of pipe/tube.
Put the end of the copper tube/pipe to downward direction as you remove burrs
in order to avoid burrs drop in the tubing.
6.2.3. Putting nut on
[Fig. 6-2-3]
Flare nut
Copper tube
• Remove arenuts attached to indoor and outdoor unit, then put them on pipe/
tube having completed burr removal.
(notpossibletoputthemonafteraringwork)
• Usethearenutincludedwiththisindoorunit.
6.2.4. Flaring work
[Fig. 6-2-4]
A
Flaring tool
Flare nut
Die
Yoke
Copper tube
• Carryoutaringworkusingaringtool.
Pipe diameter
(mm)
Dimension
A(mm)
B(mm)
When the tool for R32/R410A
is used
Clutch type
9.52 0 - 0.5 13.2
15.88 0 - 0.5 19.7
Firmly hold copper tube in a die in the dimension shown in the table at above.
• Whenreconnectingthedetachedrefrigerantpipes,makesuretoarethemagain.
6.2.5. Check
[Fig. 6-2-5]
Smooth all around
Scratchonaredplane
Inside is shining without any scratches
Cracked
Even length all around
Uneven
Too much
Bad examples
Tilted
• Comparethearedworkwithagureinrightsidehand.
Ifareisnotedtobedefective,cuto󰀨thearedsectionanddoaringworkagain.
6.3. Pipe connection
[Fig. 6-3-1]
Apply a thin coat of refrigeration oil on the seat surface of pipe.
• Forconnectionrstalignthecenter,thentightentherst3to4turnsofarenut.
Use tightening torque table below as a guideline for indoor unit side union joint
section,andtightenusingtwowrenches.Excessivetighteningdamagestheare
section.
Copper pipe O.D.
(mm)
Flare nut O.D.
(mm)
Tightening torque
(N·m)
ø9.52 22 34 - 42
ø15.88 29 68 - 82
+0
-0.4

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Mitsubishi Mr.Slim Series Specifications

General IconGeneral
Cooling Capacity9, 000 - 36, 000 BTU/h
RefrigerantR410A or R32 (depending on the model)
Operating Temperature (Cooling)5°C to 46°C
Operating Temperature (Heating)-15°C to 24°C
Noise Level (Indoor Unit)19 - 45 dB
Indoor Unit DimensionsVaries by model
Outdoor Unit DimensionsVaries by model
Weight (Indoor Unit)Varies by model
Weight (Outdoor Unit)Varies by model
FeaturesInverter Technology, Quiet Operation
Power Supply208/230V, 1-phase, 60Hz

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