Mitsubishi MFZKJ12NA-U1 User Manual

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En-6

• Make earth wire a little longer than others. (More than 45 mm)

• For future servicing, give extra length to the connecting wires.

• Do not fold the excess wire, or cram it into small space. Take caution not to damage the

wires.

• Be sure to attach each screw to its correspondent terminal when securing the cord and/

or the wire to the terminal block.

INDOOR UNIT

Terminal block

208/230VAC

1phase,60Hz

Grounding

terminal*

Disconnect

switch

OUTDOOR UNIT

Grounding terminal*

Ground

Power supply

208/230 VAC,

1 phase 2 wires.

60 Hz

Terminal

block 1

Remark:

* Use a ring tongue terminal

in order to connect a ground

wire to terminal.

Terminal block 2

2-6. CONNECTING WIRES FOR INDOOR UNIT

Note: The unit should be installed by a licensed contractor/electrician. If required by applicable national, state and local codes; a disconnect switch will need to

be installed when the indoor unit is powered from the outdoor unit.

1) Remove the electrical cover.

2) Remove the conduit plate.

3) Attach the conduit pipe to the conduit plate with the lock nut. The indoor/outdoor unit connecting wire (A) appearing from the inside of conduit pipe should be

less than 7/8 in. (23 mm). (Fig. 1)

4) Process the end of ground wire (Fig. 2). Connect it to the ground terminal of the electrical parts box.

5) Process the end of indoor/outdoor unit connecting wire (A) (Fig. 2). Attach it to the terminal block. Be careful not to make mis-wiring. Attach the wire to the terminal

block securely so that its core cannot be seen, and no external force affects the connecting section of the terminal block.

6) Firmly tighten the terminal screws. After tightening, verify that the wires are tightly fastened.

7) Reinstall the conduit plate.

8) Reinstall the electrical cover.

Fig. 1

Lead

wire

19/32 in.

(15 mm)

Fig. 2

Terminal block

Lock nut

Electrical cover

Electrical box

Conduit pipe

Grounding

terminal

Screw

Less than 7/8 in.

(23 mm)

Conduit plate

Conduit pipe

Lock nut

Conduit plate

Do not make drain piping as shown below.

Accumulated

drain water

Air

Waving

Water

leakage

Do not raise

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

Fig. 1 Fig. 2 Fig. 3

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ow.(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)

Fig. 5

Projection

Make sure to

hook the catch.

Drain hose

Pull the hose to

conrmit is con-

nected securely.

Fig. 4

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ttingofthedrain

pan.

• After connecting the drain hose, be sure to pull the hose to

conrmthatitisconnectedsecurely.

Conduit pipe

Pipe

cover

RG79Y918H02_en.indd 6 2019/05/10 8:54:08

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Mitsubishi MFZKJ12NA-U1 Air Condition

User Manual - Page 7