Справочник Пользователя для Mitsubishi Electronics pha-a-kal
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4. Installing the refrigerant piping
90°±0.5°
øA
R1-64~R1/32
A
45±2°
B
C
D
Fig. 4-1
Fig. 4-2
D
2-9/16
3-1/32
5/16
2-5/8
14-3/8
46-1/16
17-15/32 (A)*
4-27/32
18-31/32 (B)
6-1/16
23-1/32 (C)
45-15/32
2-9/16
2-9/16
3-1/32
3-7/16
3-7/16
F
F
3-1/32
3-7/16
3-7/16
2-51/64
13/32
5-9/32
11-5/8
3/16
2-9/16
2-5/8 3-1/32
5/16
G
E
4.1. Precautions
4.1.1. For devices that use R410A refrigerant
• Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration
oil applied to the flared sections.
• Use C1220 copper phosphorus, for copper and copper alloy seamless
pipes, to connect the refrigerant pipes. Use refrigerant pipes with the
thicknesses specified 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.
thicknesses specified 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 moving the air conditioner, use only the specified
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. Air enclosed in
the lines can cause pressure peaks resulting in a rupture and other hazards.
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. Air enclosed in
the lines can cause pressure peaks resulting in a rupture and other hazards.
A24, A30, A36
Liquid pipe
ø9.52 mm, 3/8 inch thickness 0.8 mm, 1/32 inch
Gas pipe
ø15.88 mm, 5/8 inch thickness 1.0 mm, 3/64 inch
• Do not use pipes thinner than those specified above.
PKA-A·KA(L)
Fig. 4-3
Fig. 4-4
PKA-A·KA(L)
B
A
D
C
B
A
(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 mm, 1/2 inch or more).
or more, thickness of 12 mm, 1/2 inch or more).
• The indoor parts of the drain pipe should be wrapped with polyethylene foam
insulation materials (specific gravity of 0.03, thickness of 9 mm, 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.
• Use refrigerant piping insulation provided to insulate indoor unit connections.
Insulate carefully.
A
Flare cutting dimensions
Copper pipe O.D.
(mm, inch)
Flare dimensions
øA dimensions (mm, inch)
ø9.52, 3/8”
12.8 - 13.2, 1/2-33/64
ø15.88, 5/8”
19.3 - 19.7, 49/64-25/32
B
Flare nut tightening torque
Copper pipe O.D.
(mm, inch)
Flare nut O.D.
(mm, inch)
Tightening torque
(N·m, ft·lbs)
ø9.52, 3/8”
22, 7/8
34 - 42, 25-30
ø15.88, 5/8”
29, 1-9/64
68 - 82, 49-59
C
Apply refrigerating machine oil over the entire flare seat surface.
D
Use correct flare nuts meeting the pipe size of the outdoor unit.
4.3. Positioning refrigerant and drain piping (Fig. 4-2)
PKA-A·KA(L)
A
Gas pipe
* Indicates the condition with accessories mounted.
B
Liquid pipe
C
Drain hose
D
Left-side piping knockout hole
E
Right-side piping knockout hole
F
Lower piping knockout hole
G
Mount board 1
4.4. Refrigerant piping (Fig. 4-3)
Indoor unit
1. Remove the flare nut and cap of the indoor unit.
2. Make a flare for the liquid pipe and gas pipe and apply refrigerating machine oil
2. Make a flare for the liquid pipe and gas pipe and apply refrigerating machine oil
(available from your local supplier) to the flare sheet surface.
3. Quickly connect the on site cooling pipes to the unit.
4. Wrap the pipe cover that is attached to the gas pipe and make sure that the
4. Wrap the pipe cover that is attached to the gas pipe and make sure that the
connection join is not visible.
5. Wrap the pipe cover of the unit’s liquid pipe and make sure that it covers the
insulation material of the on site liquid pipe.
6. The portion where the insulation material is joined is sealed by taping.
A
Site-side refrigerant piping
B
Unit side refrigerant piping
4.4.1. Storing in the piping space of the unit (Fig. 4-4)
1. Wrap the supplied felt tape in the range of the refrigerant piping which will be
housed within the piping space of the unit to prevent dripping.
2. Overlap the felt tape at one-half of the tape width.
3. Fasten the end portion of the wrapping with vinyl tape, etc.
3. Fasten the end portion of the wrapping with vinyl tape, etc.
A
Gas pipe
B
Liquid pipe
C
Indoor/outdoor connection cable
D
Felt tape 3
(inch)