Drainage Piping Work; Tions - Mitsubishi Electric PLA-RP-BA Installation Manual

4. Installing the refrigerant piping
,
Fig. 4-3

5. Drainage piping work

Max. 20m
1.5-2m
Fig. 5-1
(mm)
11
25 25 25
Fig. 5-2
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
Refrigerant pipe and
2 Wrap the enclosed small-sized pipe cover around the liquid pipe, making sure
insulating material
Pipe cover (large)
Pipe cover (small) 3 Secure both ends of each pipe cover with the enclosed bands. (Attach the
Refrigerant pipe (gas)
Refrigerant pipe (liquid) • After connecting the refrigerant piping to the indoor unit, be sure to test the pipe
Band connections for gas leakage with nitrogen gas. (Check that there is no refrigerant
Cross-sectional view of connection
leakage from the refrigerant piping to the indoor unit.)
Pipe
Insulating material
4.4. For twin/triple combination
Squeeze
Refer to the outdoor unit installation manual.
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.
Max. 15cm
Grouped piping
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.)
the end of the pipe cover touches the side of the unit.
that the end of the pipe cover touches the side of the unit.
bands 20 mm from the ends of the pipe cover.)
Correct piping
Wrong piping
Insulation (9 mm or more)
Downward slope (1/100 or more)
O.D. ø32 PVC TUBE
Make it as large as possible
Indoor unit
Make the piping size large for grouped
piping.
Unit
Insulating material
Band
Drain port (transparent)
Insertion margin
Matching
Support metal
Air bleeder
Raised
Odor trap
Downward slope (1/100 or more)
O.D. ø38 PVC TUBE for grouped piping.
(9 mm or more insulation)
Up to 85 cm
Drain pipe (O.D. ø32 PVC TUBE)
Insulating material (purchased locally)
Transparent PVC pipe
O.D. ø32 PVC TUBE (Slope 1/100 or more)
Drain socket