Mitsubishi Electronics PLA-A-AA installation manual Indoor unit Fig, Drainage piping work Fig

4. Installing the refrigerant piping

A Refrigerant pipe and insulating ma-

4.3. Indoor unit (Fig. 4-2)

A

terial

Heat insulation for refrigerant pipes:

B Pipe cover (large)

C Pipe cover (small)

D Refrigerant pipe (gas)

E Refrigerant pipe (liquid)

F Band

G Cross-sectional view of connection

H Pipe

I Insulating material

J Squeeze

G F B DE C

F

B,C

IJ

H

1Wrap 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.

2Wrap 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.

3Secure 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.

Fig. 4-2

5. Drainage piping work

		Max. 65ft
		5 to 7ft
		C
			Max. 6inch
	A	B
		F	J
	K
		L
	B
		M
D	E	D
		D
F	F	F
			G
	H
		I
		Fig. 5-1

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 figure 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, 3/8 inch or more)	L Raised
B Downward slope (1/100 or more)	M Odor trap
Grouped piping
D O.D. ø32 mm, 1-1/4 inch PVC TUBE	I O.D. ø38 mm, 1-1/2 inch PVC TUBE for
E Make it as large as possible	grouped piping.
F Indoor unit	(9 mm, 3/8 inch or more insulation)
G Make the piping size large for grouped piping.	J Up to 85 cm, 33-7/16 inch
H Downward slope (1/100 or more)

A					(inch)
B	C K		F
				G	C
					J
7/16
1	1	1		H	I
D E E
				C
				Fig. 5-2

1.Connect the drain socket (supplied with the unit) to the drain port. (Fig. 5-2) (Affix the tube using PVC adhesive then secure it with a band.)

2.Install a locally purchased drain pipe (PVC pipe, O.D. ø32 mm, 1-1/4 inch). (Affix the pipe using PVC adhesive then secure it with a band.)

3.Insulate the tube and pipe. (PVC pipe, O.D. ø32 mm, 1-1/4 inch and socket)

4.Check that drain flows 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
B Insulating material	(O.D. ø32 mm, 1-1/4 inch PVC TUBE)
C Band	H Insulating material (purchased locally)
D Drain port (transparent)	I Transparent PVC pipe
E Insertion margin	J O.D. ø32 mm, 1-1/4 inch PVC TUBE
F Matching	(Slope 1/100 or more)
	K Drain socket

6