Mitsubishi Electric MFZ-KA25VA Notice D'installation page 6

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2-7. PIPE FoRMING AND INSTAllATIoN
Pipe Forming
• Route the drain hose diagonally below the connecting pipes.
• Make sure that the drain hose is not routed upward and that there
are no waves in the hose.
• Do not pull the hose when applying the tape.
• Route the piping so that it does not project past the rear of the
indoor unit. (Refer to the figure to the right.)
Connecting Pipe Installation
• Install the connecting pipes so that the piping can move slightly to
the front, back, left, and right.
• Be sure to insulate the connecting pipes and place them near the rear of
the indoor unit so that they do not contact the front panel.
• Be careful not to crush the connecting pipes when bending them.
FOR LEFT OR LEFT-REAR PIPING
Bundle the connecting pipes and drain hose together, and then wrap
them in felt tape (11).
Cut and use the lower side panels on the left and right sides of the in-
door unit as shown below.
Smooth the cut edges of the side panels so that they will not damage
the insulation coating.
• For left or right piping
• Installing flush against a wall with molding
Wrap the felt tape (11) tightly around the pipes and hose starting near where
the pipes and hose are routed from the indoor unit. (The overlap width of the
felt tape (11) should not be more than 1/2 of the tape width.)
2-8. DRAIN PIPING
• If the extension drain hose has to pass through a room, be sure to wrap it with commercially sold insulation.
• The drain hose should point downward for easy drain flow. (Fig. 1)
• If the drain hose provided with the indoor unit is too short, connect it with drain hose (I) that should be provided at your site. (Fig. 2)
• When connecting the drain hose to the hard vinyl chloride pipe, be sure to insert it securely into the pipe. (Fig. 3)
Drain
hose
Downward
slope
Soft hose
I.D. 15 mm
Fig. 1
Fig. 2
The Drain hose is removed at installation.
• When routing the drain piping, make sure that the drain hose (1) is routed as shown. (Fig. 4)
• Insert the drain hose all the way to the base of the drain pan (end connection). (Fig. 5)
Make sure that the catch of the drain hose is securely hooked onto the projection on the hose fitting of the drain pan.
• After connecting the drain hose, be sure to pull the hose to confirm that it is connected securely.
En-
Drain hose
Hard vinyl chloride
70 cm or
pipe I.D. 30 mm
more
Insert
securely
Different
diameter joint
Fig. 3
50
Fig. 4
The catch should be
located on the underside
of the hose.
Push
Piping bent out-
ward
RIGHT DOWNWARD PIPING
Pipe cover (4)
Band (5)
Remove the cover.
Make sure that the drain hose
is not routed upward.
Felt tape (11)
Do not make drain piping as shown below.
Accumulated
Do not raise
drain water
Air
Water
Water
Waving
leakage
leakage
Refrigerant
piping
Piping
tape
Drain hose
OTHER PIPING
Band (5)
Molding
Cut the lower side panels to match the
height of the molding.
Start wrapping the piping tape (G)
around the pipes and hose 10 mm
inside the indoor unit.
Fasten the end of the felt tape (11) with
a bandage stopper.
Tip of drain
hose dipped
in water
Water
Ditch
leakage
Projection
* This projection is located on the
underside of the hose fitting.
Pull the hose
to confirm it
is connected
securely.
Drain hose
Make sure to hook the catch.
Fig. 5
At least
50 mm
gap

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