Installing The Refrigerant Piping - Mitsubishi Electric CITY MULTI PMFY-P06NBMU-E Manual De Instalación

2. Installing the indoor unit
90°
Fresh air intake hole (Knock out)
4-1/8 in. (ø2.8) burring hole
Fig. 2-8

3. Installing the refrigerant piping

45°±2°
Fig. 3-1
Flare cutting dimensions
A
Copper pipe O.D.
1/4" (ø6.35)
3/8" (ø9.52)
1/2" (ø12.7)
5/8" (ø15.88)
3/4" (ø19.05)
A
Fig. 3-2
Copper pipe O.D. Flare tool for R22
1/4" (ø6.35) 3/64-1/16 (1.0 - 1.5)
3/8" (ø9.52) 3/64-1/16 (1.0 - 1.5)
1/2" (ø12.7) 3/64-1/16 (1.0 - 1.5)
5/8" (ø15.88) 3/64-1/16 (1.0 - 1.5)
3/4" (ø19.05) 3/64-1/16 (1.0 - 1.5)
3.2. Connecting pipes (Fig. 3-1)
When commercially available copper pipes are used, insulate both the liquid and
gas pipes separately with commercially available insulation materials (heat-resistant
to 100 °C, 212 °F or more, thickness of 12 mm, 1/2 inch or more). (Fig. 3-3)
• The indoor parts of the drain pipe should be wrapped with polyethylene foam in-
sulation materials (specifi c gravity of 0.03, thickness of 23/64 in. (9 mm) or more).
Flare nut tightening torque
B
Liquid pipe
Pipe size
(mm, inch)
ODø6.35
P06, P08, P12, P15
1/4"
Apply refrigerating machine oil over the entire fl are seat surface.
C
* Do not apply refrigerating machine oil to the screw portions. (This will make the fl are nuts more apt to loosen.)
Be certain to use the fl are nuts those are attached to the main unit. (Use of commercially-available products may result in cracking.)
D
in. (mm)
9-13/16 (250) 11-3/8 (288.5)
in. (mm)
in. (mm)
Flare dimensions
øA dimensions
11/32-23/64 (8.7 - 9.1)
1/2-33/64 (12.8 - 13.2)
41/64-21/32 (16.2 - 16.6)
49/64-25/32 (19.3 - 19.7)
15/16-61/64 (23.6 - 24.0)
Die
Copper pipe
in. (mm)
A
Flare tool for R410A
Clutch type
0-1/64 (0 - 0.5)
0-1/64 (0 - 0.5)
0-1/64 (0 - 0.5)
0-1/64 (0 - 0.5)
0-1/64 (0 - 0.5)
R22
Gas pipe
Tightening Tightening
Pipe size
torque torque
(mm, inch)
(N·m, ft·lbs) (N·m, ft·lbs)
14 - 18 ODø12.7 49 - 61
10 - 13 1/2" 35 - 44
2.5. Fresh air intake hole (Fig. 2-8)
At the time of installation, use the hole (knock out) located at the positions shown
in following diagram, as and when required.
Note:
Make sure that the fresh air intake is no more than 20% of the entire air intake
(when the air fl ow speed is set to its highest setting).
Caution:
Linkage of duct fan and air conditioner.
If a duct fan is used, be sure to link it with the air conditioner when outside
air is taken in.
Do not run just the duct fan. Otherwise, condensation may form.
3.1. Precautions
3.1.1. For devices that use R22 refrigerant
• Use the refrigeration oil applied to the fl ared sections.
• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to
connect the refrigerant pipes. Use refrigerant pipes with the thicknesses specifi ed
in the table to the below. Make sure the insides of the pipes are clean and do not
contain any harmful contaminants such as sulfuric compounds, oxidants, debris,
or dust.
3.1.2. For devices that use R410A refrigerant
• Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration oil ap-
plied to the fl ared sections.
• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to
connect the refrigerant pipes. Use refrigerant pipes with the thicknesses specifi ed
in the table to the below. Make sure the insides of the pipes are clean and do not
contain any harmful contaminants such as sulfuric compounds, oxidants, debris,
or dust.
Warning:
When installing or relocating, or servicing the air conditioner, use only the
specifi ed refrigerant (R410A) to charge the refrigerant lines. Do not mix it
with any other refrigerant and do not allow air to remain in the lines.
If air is mixed with the refrigerant, then it can be the cause of abnormal high
pressure in the refrigerant line, and may result in an explosion and other hazards.
The use of any refrigerant other than that specifi ed for the system will cause
mechanical failure or system malfunction or unit breakdown. In the worst
case, this could lead to a serious impediment to securing product safety.
P06, P08, P12, P15
Liquid pipe 1/4" (ø6.35) thickness 1/32" (0.8)
Gas pipe 1/2" (ø12.7) thickness 1/32" (0.8)
• Do not use pipes thinner than those specifi ed above.
Fig. 3-3
• Apply thin layer of refrigerant oil to pipe and joint seating surface before tightening
fl are nut.
• Use 2 wrenches to tighten piping connections.
• Use refrigerant piping insulation provided to insulate indoor unit connections.
Insulate carefully.
R410A
Liquid pipe
Tightening
Pipe size Pipe size
torque
(mm, inch) (mm, inch)
(N·m, ft·lbs)
ODø6.35 14 - 18 ODø12.7
1/4" 10 - 13 1/2"
in. (mm)
Liquid pipe
Gas pipe
Insulation
Taping
Flare nut O.D.
Gas pipe
Tightening
Liquid pipe Gas pipe
torque
(mm, inch) (mm, inch)
(N·m, ft·lbs)
49 - 61 17
35 - 44 43/64 1-7/64
26
5