Indoor Unit - Mitsubishi Electric Mr.SLIM PKA-M60KA Manuel D'installation

4. Installing the refrigerant piping
E
F
Fig. 4-2
Copper pipe O.D.
Flare tool for R32/R410A
(mm)
Clutch type
ø9.52 (3/8")
ø15.88 (5/8")
 PKA-M60, 71, 100KA(L)
65

4.3. Indoor unit

Refrigerant and Drainage Piping Sizes
Model
Item
Refrigerant Liquid
piping
Gas
Drainage piping
B
Fig. 4-4
 PKA-M60, 71, 100KA(L)
C
Fig. 4-5
8
B
E Die
F Copper pipe
B (mm)
0 - 0.5
0 - 0.5
D
77
F
18.2 87
PKA-M60, 71, 100KA(L)
ODø9.52 (3/8")
ODø15.88 (5/8")
ODø16
A
B
A
D
• After connecting the refrigerant piping to the indoor unit, be sure to test the pipe
connections for gas leakage with nitrogen gas. (Check that there is no refrigerant
leakage from the refrigerant piping to the indoor unit.)
• Use flared nut installed to this indoor unit.
• In case of reconnecting the refrigerant pipes after detaching, make the flared part
of pipe re-fabricated.
Flare nut tightening torque
B
Copper pipe O.D.
(mm)
ø9.52
ø15.88
Apply refrigerating machine oil over the entire flare seat surface.
C
Do not apply refrigerating machine oil to the screw portions.
(This will make the flare nuts more apt to loosen.)
Be certain to use the flare nuts that are attached to the main unit.
D
(Use of commercially-available products may result in cracking.)
1170
444 ( A )* 123
482 ( B ) 154
585 ( C ) 134
1155
77
F
87
Fig. 4-3
4.4. Positioning refrigerant and drain piping (Fig. 4-3)
 PKA-M60, 71, 100KA(L)
Gas pipe * Indicates the condition with accessories mounted.
A
Liquid pipe
B
Drain hose
C
Left-side piping knockout hole
D
Right-side piping knockout hole
E
Lower piping knockout hole
F
Mount board
G 1
4.5. Refrigerant piping (Fig. 4-4)
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
(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
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.
Site-side refrigerant piping
A
Unit side refrigerant piping
B
4.5.1. Storing in the piping space of the unit (Fig.4-5)
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.
Gas pipe
A
Liquid pipe
B
Indoor/outdoor connection cable
C
Felt tape
D 3
Flare nut O.D. Tightening torque
(mm)
22
29
295 5
G
65
E
71.2
(N·m)
34 - 42
68 - 82