Installation manual

5
3. Installing the indoor unit
4. Installing the refrigerant piping
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 or more,
thickness of 12 mm 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 mm 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.
A Flare cutting dimensions
Copper pipe O.D. Flare dimensions
(mm) øA dimensions (mm)
ø6.35 8.7 - 9.1
ø9.52 12.8 - 13.2
ø12.7 16.2 - 16.6
ø15.88 19.3 - 19.7
B Flare nut tightening torque
Copper pipe O.D. Flare nut O.D. Tightening torque
(mm) (mm) (N·m)
ø6.35 17 14 - 18
ø9.52 22 34 - 42
ø12.7 26 49 - 61
ø15.88 29 68 - 82
ø15.88 36 100 - 120
Indoor unit (Liquid)
Indoor unit (Gas)
Outdoor unit (Liquid)
Outdoor unit (Gas)
RP2.5, 3
Flare nut attached to
indoor liquid valve
Flare nut attached to
indoor gas valve
Flare nut attached to
outdoor liquid valve
Flare nut attached to
outdoor gas valve
RP4
Flare nut attached to
indoor liquid valve
* Flare nut in outdoor
unit accessories
Flare nut attached to
outdoor liquid valve
Flare nut attached to
outdoor gas valve
* In case that the flare nut attached to indoor gas valve is used, gas leakage or even
pipe extraction will occur.
90° ±0.5°
øA
R0.4~R0.8
A
45°±2°
B
C
D
Fig. 4-1
C Apply refrigerating machine oil over the entire flare seat surface.
D Use the flare nuts as follows.
3.4. Mounting the indoor unit (Fig. 3-11)
1 Make sure to hang the metal catches of the indoor unit over the hooks of the wall
mounting fixture.
2 When the piping has been completed, use the securing screws to fix the indoor
unit on the wall mounting fixture.
Note:
Check that the catches of the indoor unit securely fit over the hooks of the wall
mounting fixture.
3 The screw indicated by the bold arrow is used only during transportation and
should be removed. Remove the screw before installation if there is not enough
space at the left side to remove it once the unit has been installed.
A Indoor unit
B Wall fixing bracket 1
C Hook
D Metal catch of the indoor unit
E Securing screws
1
3
2
D
C
4.2. Positioning refrigerant and drain piping
1 Position of refrigerant and drain piping (Fig. 4-2)
2 Determine the position of the knockout holes on the unit body (Fig. 4-3)
• Make the knockout holes using a saw blade or an adequate knife.
Caution:
The side panel must be removed before drilling a knockout hole in it.
If a hole is made with the side panel in place, the refrigerant pipe within the unit
could be damaged.
3 L-shaped connection pipe (for gas piping) (Fig. 4-4)
A 107 mm (RP2.5, 3), 102 mm (RP4) H For lower-side piping
B Drain hose I For right-side piping
C Liquid pipe J L-shaped connection pipe (option)
D Gas pipe K Unit side
E Drain hose in left-side piping L On-site piping side
F Knockout holes on the unit body M Piping
G For left-side piping
25
1110
183
120
55
42
58
111
C
D
A
D
C
B
B
B
E
1
2
3
30
37
74
100
39
4
30
37
74
39
98
32
37
65
100
39
4
GFHI
Fig. 4-2
Fig. 4-3
Fig. 4-4
Fig. 3-11
J
M
K
J
L
340
80
A
E
B