Bedienungsanleitung Midea MUED-Serie (Seite 11 von 25) (Englisch)

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installation manual

Bind the connecting pipe and the cables together tightly with

binding tapes.Pass the bound connecting pipe through the

wall conduct from outside. Be careful of the pipe allocation to

do on damage to the tubing.

Connect the pipes. Refer to "How to Connect the pipes" for

details.

Expel the air with a vacuum pump. Refer to "How to expel the

air with a vacuum pump" for details.

Open the stop values of the outdoor unit to make the

refrigerant pipe connecting the indoor unit with the outdoor

unit in fluent flow.

Check the leakage. Check all the joints with the leak detector

or soap water.

Cover the joints of the connecting pipe with the soundproof /

insulating sheath (fittings), and bind it well with the tapes to

prevent leakage.

Be sure to with insulating materials cover all the exposed

parts of the flare pipe joints and refrigerant pipe on the

liquid-side and the gas-side. Ensure that there is no gap

between them.

Incomplete insulation may cause water condensation.

CAUTION

How to Connect the pipes

Flaring

Cut a pipe with a pipe cutter. (Refer to Fig.7-1)

Insert a flare nut into a pipe and flare the pipe.

Refer to Table 7-2 for the dimension of flare nut spaces.

Fig.7-1

Lean crude burr

Bend the tubing in proper way. Do not harm to them.

Connect the indoor unit at first, then the outdoor

unit.

Too large torque will harm the bellmouthing and too small

will cause leakage. Please determine the torque

according to Table 7-2.

After the connecting work is finished, be sure to check

that there is no gas leak.

When connecting the flare nut, coat the flare both inside

and outside with either oil or ester oil and initially tighten

by hand 3 or 4 turns before tighting firmly.

Be sure to use both a spanner and torque wrench

together when connecting or disconnecting pipes to /from

the unit.

Bend the pipe with thumb

min-radius 100mm Fig.7-4

Fig.7-5

Fig.7-6

How to expel the air with a vacuum pump

Stop valve operation introduction

1. Opening stop valve

Remove the cap and turn the valve counter

clock-wise with the hexagon wrench.

Turn it until the shaft stops.Do not apply excessive force

to the stop valve. Doing so may break the valve body,

as the valve is not a backseat type. Always use the

special tool.

Make sure to tighten the cap securely.

CAUTION

Table 7-2

Ø6.35 8.3 8.7

Ø9.52 12.0

Ø12.7 15.4

Ø15.9

Ø19

18.6

22.9

R0.4~0.8

65～67N.m

(663～684 kgf.cm)

45～47 N.m

(459～480 kgf.cm)

35～36 N.m

(357～367 kgf.cm)

25～26N.m

(255～265 kgf.cm)

15～16 N.m

(153～163 kgf.cm)

(mm)

min max

Pipe gauge

Tightening torque

Flare dimensin A

Flare shape

12.4

15.8

19.0

23.3

Remove the Cycle Service Panel and the Cover

Board, unscrewing the screws which secure it to

the structure

Remove the protection cover of stop valve

Fig.7-3

Liquid Valve

Gas Valve

The bending angle should not exceed 90.

Bending position is preferably in the middle of the

bendable pipe. The larger the bending radius the better it

is.

Do not bend the pipe more than three times.

Fig.7-2

Cycle Service Panel

Cover Board

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