Filter
Top Products
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, 25/32 inch 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 mm, 1-1/4 inch 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.
Correct piping
Support metal
Wrong piping
Air bleeder
Insulation (9 mm, 23/64 inch or more)
Raised
Downward slope (1/100 or more) Odor trap
Grouped piping
O.D. ø32 mm, 1-1/4 inch PVC TUBE Downward slope (1/100 or more)
Make it as large as possible
O.D. ø38 mm, 1-1/2 inch PVC TUBE for
grouped piping.(9 mm, 23/64 inch or more
insulation)
Indoor unit
Make the piping size large for grouped
piping.
Up to 850 mm, 33-7/16 inch
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. ø32mm, 1-1/4 inch).
(Fix the pipe using PVC adhesive then secure it with a band.)
3.Insulate the tube and pipe. (PVC pipe, O.D. ø32mm, 1-1/4 inch 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.)
Unit
Drain pipe (O.D. ø32mm, 1-1/4inch PVC
TUBE)
Insulating material
Insulating material (purchased locally)
Band
Transparent PVC pipe
Drain port (transparent) O.D. ø32 mm, 1-1/4 inch PVC TUBE (Slope
1/100 or more)
Insertion margin
Drain socket
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. 65 ft
5 to 7 ft
Max. 6 inch
Fig. 5-1
Fig. 5-2
(inch)
7/16
111