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Installation EDUS39-900A-F11_a

20 FXMQ-M

7. DRAIN PIPING WORK

Rig the drain pipe as shown below and take measures

against condensation. Improperly rigged piping could

lead to leaks and eventually wet furniture and belong-

ings.

Insulate the drain hose inside the building.

(1) Carry out the drain piping.

• Keep piping as short as possible and slope it down-

wards so that air may not remaine trapped inside the

pipe.

• Keep pipe size equal to or greater than that of the con-

necting pipe (Vinyl pipe of 1in. nominal diam. and

1-1/4in. outer diam.).

• Insulate the clamp metal with the sealing pad.

• In order to prevent foreign matter from building up

inside the piping, you should avoid curves as much

as possible.

NOTE

• If converging multiple drain pipes, install according to the

procedure shown below.

• A drain trap need not be installed.

• The diameter of the piping is the same as that of the

connecting pipe (PS1B), and should be kept equal to or

greater than that of the connecting pipe.

(2) After piping work is finished, check drainage flows

smoothly.

• Open the water supply port, add appximately 61in

. of

water slowly into the drain pan and check drainage flow.

CAUTION

• Drain piping connections

Do not connect the drain piping directly to sewage pipes

that smell of ammonia. The ammonia in the sewage might

enter the indoor unit through the drain pipes and corrode

the heat exchanger.

8. ELECTRIC WIRING WORK

8-1 GENERAL INSTRUCTIONS

• All field supplied parts and materials and electric works

must conform to local codes.

• Use copper wire only.

• For electric wiring work, refer to also “Wiring diagram label”

attached to the electrical components box lid.

• For remote controller wiring details, refer to the installation

manual attached to the remote controller.

• All wiring must be performed by an authorized electrician.

• This system consists of multiple indoor units. Mark each

indoor unit as unit A, unit B..., and be sure the terminal

board wiring to the outdoor unit and BS unit are properly

matched. If wiring and piping between the outdoor unit and

an indoor unit are mismatched, the system may cause a

malfunction.

• A ground fault circuit interrupter capable of shutting down

power supply to the entire system must be installed.

• Refer to the installation manual attached to the outdoor unit

for the size of power supply wiring connected to the outdoor

unit, the capacity of the ground fault circuit interrupter and

switch, and wiring instructions.

• Be sure to ground the air conditioner.

• Do not connect the ground wire to gas and water pipes,

lightning rods, or telephone ground wires.

• Gas pipes : might cause explosions or fire if gas leaks.

• Water pipes : no grounding effect if hard vinyl piping is

used.

• Telephone ground wires or lightning rods : might cause

abnormally high electric potential in the ground during

lighting storms.

8-2 ELECTRICAL CHARACTERISTICS

MCA: Minimum Circuit Amps (A); MOP: Maximum

Overcurrent Protection; kW: Fan Motor Rated Output (kW);

FLA: Full Load Amps (A)

Bottom of unit

Attached drain hose

Metal clamp

Drain hoseTape

1/8in. or less

Drain hose

Sealing pad

(Field supply)

Metal clamp

(Field supply)

3-15/16in.

or more

Units Power supply Fan motor

Model Hz Volts

Voltage

range

MCA MOP W FLA

FXMQ72MVJU

208-

230

Max. 253

Min. 187

9.5 15

380×2

7.6

FXMQ96MVJU

10.7 15

380×2

8.6

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