Positioning Refrigerant And Drain Piping - Mitsubishi Electric CITY MULTI PKFY-P-VAM-E Serie Manual De Instalación

4. Refrigerant pipe and drain pipe
1
A
660
C
450
B
520
Fig. 4-2
2
E
I
54
24.4
J
K
H
Fig. 4-3
A
C
G
C
H
A Inclined downwards
B Must be lower than outlet point
C Water leakage
D Trapped drainage
E Air
F Wavy
G The end of drain pipe is under water.
H Drainage ditch
I 5 cm or less between the end of drain pipe and
the ground
Fig. 4-4
D
A
E
F
H
Fig. 4-5
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(mm)
B
C
D
110
116
(mm)
F G
I
L
16
2.5
K
10
45 91.5
34
D
B
E
C
F
I
B
C
(mm)
100
I G

4.2. Positioning refrigerant and drain piping

1 Position of refrigerant and drain piping (Fig. 4-2)
• The drain pipe can be cut midway to meet the on-site conditions.
A (Total length of flexible hose)
B Liquid pipe
2 Determine the position of the knockout holes on the unit body. (Fig. 4-3)
s Cut the knockout holes using a saw blade or an adequate knife.
Take care not to damage other parts of the unit.
• Remove the corner box and drill a knockout hole. If a hole is made without remov-
ing the box, the drain hose could be damaged.
E Left-side piping
F Lower piping
G Right-side piping
H Knockout hole for left-side piping
4.3. Drain piping (Fig. 4-4)
• Drain pipes should have an inclination of 1/100 or more.
• For extension of the drain pipe, use a soft hose (inner dia. 16 mm) available on the
market or hard vinyl chloride pipe (VP-16). Make sure that there is no water leak-
age from the connections.
• If the drain pipe passes indoors it must be covered with insulating material (foamed
polyethylene: specific gravity: 0.03, thickness: 9 mm or more) available on the mar-
ket.
• Do not put the drain piping directly in a drainage ditch where sulphuric gas may be
generated.
• When piping has been completed, check that water flows from the end of the drain
pipe.
Caution:
The drain pipe should be installed according to this Installation Manual to en-
sure correct drainage. Thermal insulation of the drain pipes is necessary to
prevent condensation. If the drain pipes are not properly installed and insu-
lated, condensation may drip on the ceiling, floor or other possessions.
4.4. Completing the piping (Fig. 4-5)
• To prevent condensation from dripping, put felt tape over the insulation materials
on the refrigerant and drain pipes within the unit as shown in the diagram.
• Arrange the drain hose so that it goes to the bottom of the unit.
• The overlapping width of felt tape is one half of the tape width.
A Felt tape
B Liquid pipe
C Gas pipe
D Drain piping
E Viewed from the back
F Take care that the middle of the drain hose is not raised.
G In the case of left piping, the refrigerant pipes and the drain pipe should be taped separately.
H Wrap together the refrigerant pipes and the drain pipe with felt tape so that white felt over-
laps by 20 mm or more.
* The pipes should be wrapped so that they are housed behind the unit.
I Fix the end of the felt tape with a bandage fixture.
C Gas pipe
D Drain hose
I Corner box
J Knockout hole for lower piping
K Through hole for the remote controller's ca-
ble
L Knockout hole for right-side piping
5