Mitsubishi Electric MFZ-KA50VA / SUZ-KA50VA [8/24] 10 drain piping

4-11 FRONT PANEL INSTALLATION

1 Open the horizontal vane for the upper air outlet.

2 Fit the front panel onto the indoor unit from the front, and then push the upper and lower areas that are

marked with arrows.

3 Push the areas below the upper air outlet and the areas above and below the lower air outlet that are marked

with arrows.

4 After installing the front panel, install the 2 screws below the upper air outlet.

• 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 drain hose, and then wrap tape around it.

• Route the piping so that it does not project past the rear of the indoor unit.

(Refer to the figure to the right.)

200

Fig. 7 Fig. 8

• When routing the drain piping, make sure that the drain hose 1 is routed as shown. (Fig. 7)

• Insert the drain hose all the way to the base of the drain pan. (Fig. 8)

Make sure that the drain hose is securely caught on the projection in the hole in the drain pan.

Piping tape

Piping bent

outward

Drain hose

Refrigerant

piping

Push

4-10 DRAIN PIPING

• Be sure to route the drain piping slightly downward so that the drain water flows easily. (Fig. 1)

Do not route the drain piping as shown in Fig. 2 to 5.

Fig. 1 Fig. 2 Fig. 3

Fig. 4

Fig. 5

Fig. 6

Sloping

downward

No upward

slope

Accumulated

drain water

If the drain hose is routed

indoors, be sure to wrap it

in commercially-available

insulation.

50 mm or

less from

ground

Air

End of drain

hose is

immersed in

water.

Drainage

channel

Drain hose

Flexible PVC

hose (inner

diameter: 15 mm)

or rigid PVC pipe

(VP-16)

• If the drain hose is too short, refer to Fig. 6 to extend the length of the hose.

• If the indoor unit is installed in a high location such as a high-rise apartment, strong winds may cause the

drain water to flow back through the drain hose and leak from the unit. If necessary, contact your nearest

Mitsubishi Electric representative for the optional parts to prevent this problem.

• If the drain hose is routed indoors, be sure to wrap it in commercially-available insulation.

• If embedding the piping in a wall, remove the lower side panels on the left and right sides of the indoor unit

when connecting the drain hose.

• Do not connect the drain piping directly to a septic tank, sewage tank, etc., where ammonia gases or hydro-

gen sulfide are produced.

• If there is slack in the drain hose or the end of the drain hose is raised up, the drain water may not flow

smoothly and some drain water may collect in the hose. This can lead to a strange sound (burbling) being

produced during strong winds or when a ventilation fan, etc., is used in a residence that is well-sealed. If

necessary, contact your nearest Mitsubishi Electric representative for the optional parts to prevent this prob-

lem.

01HM05A309_RAC-IM_en.pm6 4/6/05, 1:38 PM8

Mitsubishi Electric MFZ-KA50VA / SUZ-KA50VA [8/24] 10 drain piping

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