4
3. Installing the indoor unit
2
-
2
Lift the indoor unit by hooking the supporting piece (attached to the mount
board) to the ribs on the back of the unit as shown. (Fig. 3-6)
When piping work etc. is complete, replace the supporting piece on the
mount board.
(If the unit is not fixed securely, vibration may occur during operation.)
A
Mount board
B
Supporting piece
C
Rib
3
If the flare pipe is to be embedded into the wall in advance: (Fig. 3-7)
• Determine the length of pipe to be embedded by marking on the mounting plate
as a reference.
L
Mark
1
Wall mounting fixture
3.3. Mounting the unit (Fig. 3-8)
1
Securely place the hanging fixtures for the indoor unit over the catches on the
wall mounting fixture.
A
Indoor unit
B
Wall mounting fixture
C
Catch
2
When piping has been completed, install the indoor unit and wall mounting
fixture with fixing screws.
Fig. 3-6
Fig. 3-7
Fig. 3-8
2
-
2
3
4. Refrigerant pipe and drain pipe
4.1. 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).
• 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.
Insulate carefully. Insulate carefully.
A
Flare cutting dimensions
Copper pipe O.D.
(mm, inch)
Flare dimensions
øA dimensions (mm, inch)
ø6.35, 1/4"
8.7-9.1, 11/32-23/64
ø12.7, 1/2"
16.2-16.6, 41/64-21/32
B
Refrigerant pipe sizes & Flare nut tightening torque
R22
R410A
Flare nut O.D.
Liquid pipe
Gas pipe
Liquid pipe
Gas pipe
Pipe size
(mm, inch)
Tightening
torque
(N·m, ft·ibs)
Pipe size
(mm, inch)
Tightening
torque
(N·m, ft·ibs)
Pipe size
(mm, inch)
Tightening
torque
(N·m, ft·ibs)
Pipe size
(mm, inch)
Tightening
torque
(N·m, ft·ibs)
Liquid pipe
(mm, inch)
Gas pipe
(mm, inch)
P06/P08
ODø6.35
1/4"
14-18
10-13
ODø12.7
1/2"
49-61
35-44
ODø6.35
1/4"
14-18
10-13
ODø12.7
1/2"
49-61
35-44
17
43/64
26
1-7/64
C
Do not apply refrigeranting machine oil to the screw portions.
(This will make the flare nuts more apt to loosen.)
D
Be certain to use the flare nuts that are attached to the main unit.
(Use of commercially-available products may result in cracking.)
E
Apply refrigeranting machine oil over the entire flare seat surface.
90 ±0.5
øA
R1/64
to
R1/32
45 ±2
Fig. 4-1
(inch)