MUZFS18NAU1 User Manual

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2-4-2. DRAIN PIPING

• If the extension drain hose has to pass through a room, be sure to wrap it with insula-

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• The drain hose should point downward for easy drain. (Fig. 1)

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drain hose (I). (Fig. 2)

• When connecting the drain hose to a hard vinyl chloride pipe, be sure to insert it

securely into the pipe. (Fig. 3)

Do not make drain piping as shown below.

Do not raise

Accumulated

drain water

Air

Waving

Water

leakage

Water

leakage

Water

leakage

Tip of drain

hose dipped

in water

Ditch

At least

1-31/32 in.

(50 mm)

gap

Downward

slope

Drain

hose

Soft hose

I.D. 19/32 in.

(15 mm)

Drain hose

Hard vinyl chloride pipe

I.D. 1-3/16 in.

(30 mm)

Insert

securely

Different

diameter

joint

27-9/16 in.

(70 cm)

or more

Fig. 1 Fig. 2 Fig. 3

Liquid pipe

Gas pipe

Felt tape (4)

Indoor/outdoor unit

connecting wire (A)

Piping tape (G)

2-4. PIPE FORMING AND DRAIN PIPING

2-4-1. PIPE FORMING

• Place the drain hose below the refrigerant piping.

• Make sure that the drain hose is not crowded or bent.

• Do not pull the hose when applying the tape.

• When the drain hose passes the room, be sure to wrap it with insulation material

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Note:

Make sure not to damage the cover of refrigerant pipe when attaching it back on with

screws.

Left or left-rear piping

Note:

Be sure to reattach the drain hose and the drain cap if the piping is being installed on

left or bottom left of unit, otherwise, water could drip down from the drain hose.

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from the end.

Felt tape (4) overlap width should be 1/3 the tape width. Use a bandage stopper at the

end of felt tape (4).

2) Pull out the drain cap at the back right of the indoor unit. (Fig. 1)

• Hold the convex section at the end and pull the drain cap.

3) Pull out the drain hose at the back left of the indoor unit. (Fig. 2)

• Hold the claw marked by the arrows and pull out the drain hose forward.

4) Put the drain cap into the section to which the drain hose is to be attached at the rear

of the indoor unit. (Fig. 3)

• Insert a screwdriver into the hole on the cap and insert the cap fully into the

drain pan.

5) Insert the drain hose fully into the drain pan at the back right of the indoor unit. (Fig. 4)

• Check if the hose is hooked securely to the projection of its inserting part at the

drain pan.

6) Insert the drain hose into wall hole sleeve (C), and attach the upper part of indoor unit

onto the installation plate (1). Then, shift the indoor unit completely to the left to make

placing the piping in the back of the unit easier.

7) Cut out a piece of cardboard from the shipping box, roll it up, hook it onto the back rib,

and use it as a spacer to lift the indoor unit. (Fig. 5)

8) Connect the refrigerant piping with the extension pipe (B).

9) Attach the lower part of the indoor unit into the installation plate (1).

Remove panel for piping

on left side of unit.

Drain cap

Drain hose

Drain cap

Drain hose

Fig. 1 Fig. 2

Fig. 3

Fig. 4

Fig. 5

Piping tape (G)

Felt tape (4)

Rear or bottom piping

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(G) from the end.

2) Insert the piping and the drain hose into the wall hole sleeve (C), and attach the upper

part of the indoor unit on the installation plate (1).

3) Check if the indoor unit is attached securely on the installation plate (1) by moving the

unit to left and right.

4) Attach the lower part of the indoor unit into the installation plate (1).

Right piping

Note:

Before performing the following, make sure that wiring is completed, and the conduit

cover is installed. (Refer to 2-3.)

1) Place the refrigerant piping and the drain hose together, shift them to left side of the

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2) Insert the piping and the drain hose into the wall hole sleeve (C), and attach the upper

part of the indoor unit on the installation plate (1).

3) Check if the indoor unit is attached securely on the installation plate (1) by moving the

unit to left and right.

4) Attach the lower part of the indoor unit into the installation plate (1).

To the left

Remove corner

box for piping

on right side

of unit

Remove corner box for piping

on bottom side of unit

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User Manual - Page 5