6
4.3. Indoor unit (Fig. 4-3)
Heat insulation for refrigerant pipes:
1 Wrap the enclosed large-sized pipe cover around the gas pipe, making sure
that the end of the pipe cover touches the side of the unit.
2 Wrap the enclosed small-sized pipe cover around the liquid pipe, making sure
that the end of the pipe cover touches the side of the unit.
3 Secure both ends of each pipe cover with the enclosed bands. (Attach the
bands 20 mm from the ends of the pipe cover.)
• 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.)
4.4. For twin/triple combination
Refer to the outdoor unit installation manual.
4. Installing the refrigerant piping
5. Drainage piping work
5.1. Drainage piping work (Fig. 5-1)
• Use VP25 (O.D. ø32 PVC TUBE) for drain piping and provide 1/100 or more
downward slope.
• Be sure to connect the piping joints using a polyvinyl type adhesive.
• Observe the
fi
gure for piping work.
• Use the included drain hose to change the extraction direction.
1
Correct piping
C
Support metal
2
Wrong piping
K
Air bleeder
A
Insulation (9 mm or more)
L
Raised
B
Downward slope (1/100 or more)
M
Odor trap
Grouped piping
D
O.D. ø32 PVC TUBE
H
Downward slope (1/100 or more)
E
Make it as large as possible
I
O.D. ø38 PVC TUBE for grouped piping.
(9 mm or more insulation)
F
Indoor unit
G
Make the piping size large for grouped
piping.
J
Up to 85 cm
1.Connect the drain socket (supplied with the unit) to the drain port. (Fig. 5-2)
(Fix the tube using PVC adhesive then secure it with a band.)
2.Install a locally purchased drain pipe (PVC pipe, O.D. ø32).
(Fix the pipe using PVC adhesive then secure it with a band.)
3.Insulate the tube and pipe. (PVC pipe, O.D. ø32 and socket)
4.Check that drain
fl
ows smoothly.
5.Insulate the drain port with insulating material, then secure the material with a
band. (Both insulating material and band are supplied with the unit.)
A
Unit
G
Drain pipe (O.D. ø32 PVC TUBE)
B
Insulating material
H
Insulating material (purchased locally)
C
Band
I
Transparent PVC pipe
D
Drain port (transparent)
J
O.D. ø32 PVC TUBE(Slope 1/100 or more)
E
Insertion margin
K
Drain socket
F
Matching
Fig. 4-3
Refrigerant pipe and
insulating material
Pipe cover (large)
Pipe cover (small)
Refrigerant pipe (gas)
Refrigerant pipe (liquid)
Band
Cross-sectional view of connection
Pipe
Insulating material
Squeeze
,
Max. 20m
1.5-2m
Max. 15cm
Fig. 5-1
Fig. 5-2
(mm)
11
25
25
25
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2008/12/10 10:42:39
