Installing The Refrigerant Piping - Mitsubishi Electric Mr.SLIM PKA-A12GA Manual De Instalación

4.
Installing the refrigerant piping
4.1. Precautions
4.1.1. For devices that use R410A refrigerant
. Use ester oil, ether oil, a(kyibenzene oil (small amount) as the refrigeration oil
applied to the flared sections.
. Use Cl 220 copper phosphorus, for copper and copper alloy seamless pipes,
to connect the refrigerant pipes. Use refrigerant pipes with the thicknesses
specified in the tab(e to the be(ow. Make sure the insides of the pipes are
clean and do not contain any harmful contaminants such as sulfuric com-
pounds, oxidants, debris, or dust.
®
45o_+2°
®
Fig. 44
@ Flare cutting dimensions
Copper pipe O.D. Flare dimensions
(mm, inch) sA dimensions (mm, inch)
06.35, 1/4" 8.7 - 9.1,11/32-23/64
09.52, 3/8" 12.8- 13.2, 1/2-33/64
o12.7, 1/2" 16.2 - 16.6, 41/64-21/32
el 5.88, 5/8" 19.3 - 19.7, 49/64-25/32
Z_ Warning:
When installing or moving the air conditioner, use only the specified refriger-
ant (R410A) to charge the refrigerant lines. Do not mix it with any other refriger-
ant and do not a((ow air to remain in the (ines. Air enclosed in the (ines can
cause pressure peaks resulting in a rupture and other hazards.
I A12, A18
Liquid pipe e6.35mm, 1/4 inch thickness 0.8 mm, 1/32 inch
Gas pipe e12.7mm, 1/2 inch thickness 0.8 mm, 1/32 inch
Do not use pipes thinner than those specified above.
(inch)
4.2. Connecting pipes (Fig. 4-1)
= When commercially available copper pipes are used, wrap liquid and gas pipes
with commercially available insulation materials (heat-resistant to 100 °C, 212 °F or
more, thickness of 12 ram, 1/2 inch or more).
= The indoor parts of the drain pipe should be wrapped with polyethylene foam insu-
lation materials (specific gravity of 0.03, thickness of 9 ram, 23/64 inch or more).
= Apply thin layer of refrigerant oil to pipe and joint seating surface before tightening
flare nut.
= Use two wrenches to tighten piping connections.
= Use refrigerant piping insulation provided to insulate indoor unit connections. Insu-
late carefully.
(_) Flare nut tightening torque
Copper pipe O.D.
(mm, inch)
06.35, 1/4"
e9.52, 3/8"
o12.7, 1/2"
o15.88, 5/8"
Flare nut O.D. Tightening torque
(mm, inch) (N.m, ft4bs!
17, 43/64 14 - 18, 10-13
22, 7/8 34 - 42, 25-30
26, 1-3/64 49 - 61, 35-44
29, 1-9/64 68 - 82, 49-59
© Apply refrigerating machine oil over the entire flare seat surface.
@ Use correct flare nuts meeting the pipe size of the outdoor unit.
Avaimabmepipe size
Liquid side
Gas side
A12, A18
06.35
o12.7
O : Factory flare nut attachment to the heat-exchanger.
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