Mitsubishi Electric MFZ-KT25VG Installation Manual page 7

2-6. PIPE FORMING AND INSTALLATION
Note: Refer to 3. FLARE CONNECTION, PIPE CONNECTION.
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.
• When the cover is removed, be sure to cover the pipes so that no piping
is exposed to the room after installing the piping.
• Fill the gap after installing the piping.
• Be sure to insulate the connecting pipes so that they do not contact the
panel.
• Be careful not to crush the connecting pipes when bending them.
For MFZ-KT60
• Be sure to use the joint pipe (14), otherwise the extension pipe of ø15.88
cannot be fixed.
• Flare the joint pipe (14) to ø12.7, and attach the pipe cover (15).
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 indoor unit
as shown below.
Smooth the cut edges of the side panels so that they will not damage the insula-
tion 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.)
2-7. 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 (J) 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
Different diam-
eter joint
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.
Use the flare nut attached to the unit.
Be careful about the direction of the nuts.
Drain hose
Hard vinyl chloride
70 cm or
pipe I.D. 30 mm
more
Insert
securely
Fig. 3
Push
Piping bent outward
RIGHT DOWNWARD PIPING
Band (5)
ø
12.7 flare
Pipe cover (4)
Joint pipe (14)
Pipe cover (15)
Make sure that the drain hose
Felt tape (11)
is not routed upward.
Do not make drain piping as shown below.
Accumulated
Do not raise
drain water
Water Water
Waving
leakage leakage
Fig. 4
Refrigerant
Piping
piping
tape
Indoor unit
Drain hose
OTHER PIPING
Pipe cover (4)
Band (5)
Remove the cover.
* Fill the gap after installing the piping.
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
Air
in water
Water
Ditch
leakage
Projection
Pull the hose to
confirm it is con-
nected securely.
Make sure to
hook the catch.
Fig. 5
Drain hose
EN
Band (5)
Molding
At least
50 mm
gap
EN-6