Mitsubishi Electric Mr. Slim PM SERIES Manual page 24

CEILING CASSETTE PM SERIES PMH-P1/P1.6/P2BA
E F
D
C
I
D
G
N
A
K
B
E
D
F
F
H
Max. 15cm
F
A-304
C
H
A·B
Max. 20m
0.75–1.5m
C
O
B
L
M
D
D
F
G
I
Max. 50cm
4. Refrigerant piping work
• This unit has the flared connections on both indoor and outdoor
sides.
1) When using commercially available copper pipes:
• When commercially available copper pipes are used, wrap liquid
and gas pipes with commercially available insulation materials (heat-
resistant to 100: or more, thickness of 12 mm or more).
• The indoor parts of the drain pipe should be wrapped with
polyethylene foam insulation materials (specific gravity of 0.03, thick-
ness of 9 mm or more).
Refrigerant and Drainage Piping Sizes
Model
Item
Liquid OD{6.35 (1/4")
Refriger-
ant piping
Gas OD{12.7 (1/2")
Drainage piping
2) Installing procedures
1. Remove the flare nuts and caps from the indoor unit.
2. Flare-cut the liquid and gas pipes then apply refrigerating machine
oil (to be locally procured) over the flare-cut seat surface.
3. Quickly connect the refrigerant piping.
∗ Remember to tighten the flare nuts with a double spanner.
4. Slide the supplied pipe cover 3 over the gas piping until it is pressed
against the sheet metal inside the unit.
5. Slide the provided pipe cover 3 over the liquid piping until it is
pressed against the sheet metal inside the unit.
6. Tighten the pipe cover 3 at the both ends (15 - 20 mm) with the
supplied bands 4.
A Gas piping E Turn the seam upward.
B Liquid piping F Press the pipe cover against the sheet metal.
C Band 4 G Refrigerant piping heat insulating material
D Pipe cover 3 H Wrap tightly
I Cut off excess length of band.
5. Drain piping work
• Use O. D. {26 PVC PIPE for drain piping and provide 1/100 or
more downward slope.
• Be sure to connect the piping joints using adhesive of polyvinyl chlo-
ride family.
• Observe the figure for piping work.
• Use attached drain hose to change the pipe extraction direction.
1 Correct piping
2 Wrong piping
A Insulation (9 mm or more)
B Downward slope (1/100 or more)
C Support metal
K Air bleeder
L Raised
M Odor trap
N Make as little as possible
O Make as great as possible (approx. 10 cm)
Grouped piping
D VP20 (O. D. {26 PVC PIPE)
E Make it as large as possible
F Indoor unit
G Make the piping size large for grouped piping.
H Downward slope (1/100 or more)
I O. D. {38 PVC PIPE for grouped piping.
(9 mm or more insulation)
P1 P1.6, P2
OD{9.52 (3/8")
OD{15.88 (5/8")
PVC pipe: OD{26 (1")