Drainage Piping Work - Mitsubishi Electric CITY MULTI PLFY-EP NEMU-E Série Manuel D'installation

3. Installing the refrigerant piping
G
F
B, C
J
I
H
Fig. 3-2
4. Drainage piping work
1 65 ft
5 to 7 ft
A
B
2
K
B
3
D E D
F F
H
I
Fig. 4-1
(inch)
F
A C K F H
1/4 1-3/16 1-3/16
G
D E
C
J
I
Fig. 4-2
A Refrigerant pipe and heat
A
insulation
B Pipe cover (large)
C Pipe cover (small)
D Refrigerant pipe (gas)
E Refrigerant pipe (liquid)
F Band (large)
G Cross-sectional view of
connection
H Pipe
I Heat insulation
J Squeeze
B D
F
E
C
Max. 6 inch
C
J
F
L
M
D
F
G
C
A
9/32
9/32
23/32
B
3.2. Indoor unit (Fig. 3-2)
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.)
4.1. Drainage piping work (Fig. 4-1)
• The indoor parts of the drain pipe should be wrapped with polyethylene foam insula-
tion materials (specific gravity of 0.03, thickness of 9 mm, 11/32 inch or more).
• 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 PVC type adhesive.
• Observe the figure for piping work.
• Use the included drain hose to change the extraction direction.
Correct piping
1
Wrong piping
2
Grouped piping
3
Insulation (9 mm, 11/32 inch or more)
A
Downward slope (1/100 or more)
B
Support metal
C
O.D. ø32 mm, 1-1/4 inch PVC TUBE
D
Make it as large as possible
E
(about 100 mm, 3-15/16 inch)
Indoor unit
F
1. Connect the drain socket (supplied with the unit) to the drain port. (Fig. 4-2)
(Fix the tube using PVC adhesive then secure it with a band.)
2. Install a locally purchased drain pipe (PVC pipe, O.D. ø32 mm, 1-1/4 inch).
(Fix the pipe using PVC adhesive then secure it with a band.)
3. Check that drain flows smoothly.
4. Insulate the drain port and socket with insulating material, then secure the material
with a band. (Both insulating material and band are supplied with the unit.)
5. Insulate the tube and pipe. (PVC pipe, O.D. ø32 mm, 1-1/4 inch)
Main unit
A
Insulating material
B
H
Band
C
Drain port (transparent)
D
Insertion margin
E
Matching
F
G
Make the piping size large for grouped pip-
G
ing.
Downward slope (1/100 or more)
H
O.D. ø38 mm, 1-1/2 inch PVC TUBE for
I
grouped piping
(9 mm, 11/32 inch or more insulation)
Up to 850 mm, 33-7/16 inch
J
Air bleeder
K
Raised
L
Odor trap
M
Drain pipe (O.D. ø32 mm, 1-1/4 inch PVC TUBE)
G
Insulating material (purchased locally)
H
Transparent PVC pipe
I
O.D. ø32 mm, 1-1/4 inch PVC TUBE
J
(Slope 1/100 or more)
Drain socket
K
en
4