Daikin FXHQ32MVE Manual de instalación descargar pdf (Pagina 8)

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FXMQ200 · 250MFV1

Insulate the liquid pipe using the insulation for fitting (Accessory

2)).

(Tighten both edges with clamping material.)

2. Use the attached pipe (Accessory 1)) for connecting the

gas pipes and make sure to insulate the gas pipes (using

field supplied insulation) all the way to the base where they

connect to the unit.

3. The turning torque of the hexagon head bolts (Accessory

7)) to connect the attached pipe (Accessory 1)) to the unit is

21.5 – 28.9 N/m.

CAUTION

Be sure to insulate any field pipe all the way to the pipe con-

nection inside the unit. Any exposed pipe may cause

cndensate or burns if touched.

CAUTION

CAUTION TO BE TAKEN WHEN BRAZING REFRIGERANT PIPING

Do not use flux when brazing refrigerant piping. Therefore,

use the phosphor copper brazing filler metal (BCuP-2:JIS z

3264/B-Cu93P-710/795: ISO 3677) which does not require

flux.

(Flux has extremely harmful infulence on refrigerant piping

systems. For instance, if the chlorine based flux is used, it

will cause pipe corrosion or, in particular, if the flux contains

fluorine, it will damage the refrigerant oil.)

• Before brazing local refrigerant piping, nitrogen gas shall be

blown through the piping to expel air from the piping.

If your brazing is done without nitrogen gas blowing, a large

amount of oxide film develops inside the piping, and could

cause system malfunction.

• When brazing the refrigerant piping, only begin brazing after

having carried out nitrogen substitution or while inserting

nitrogen into the refrigerant piping. Once this is done, con-

nect the unit with a flared or a flanged connection.

•

Nitrogen should be set to 0.02 MPa with a pressure-reducing

valve if brazing while inserting nitrogen into the piping.

7. DRAIN PIPING WORK

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

against condensate. Improperly rigged piping could lead to

leaks and eventually wet furniture and belongings.〉〉

〈〈Insulate the drain pipes inside the building and the drain

sockets.〉〉

(1) Carry out the drain piping.

•

The drain pipe should be short with a downward slope lower

than 1/100 and should prevent air pockets from forming.

• The diameter of the pipe is the same as that of the con-

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

greater than that of the connecting pipe.

NOTE

•

If converging multiple drain pipes, install according to the pro-

cedure shown below. (Select an appropriate central drain

pipe thickness for the units they will be connected to.)

(2)

After piping work is finished, check drainage flow smoothly.

• Open the water supply port, add approximately 1 litre of

water slowly into the drain pan and check drainage flow.

(Refer to Fig. 13)

Pools of drainage can cause the drain pipes to clog.

CAUTION

• Do not connect the drain pipe directly to sewage pipes that

smell of ammonia. The ammonia in the sewage might enter

the unit through the drain pipes and corrode the heat

exchanger.

Fig. 10

Insulation

(Field supplied)

Insulation

(Field

supplied)

Attached pipe

(Accessory 1))

Eliminate

a gap

Eliminate

a gap

Main body

Insulation

(Attached with

main body)

Insulation

(Attached with

main body)

Spring washer (Accessory 6))

Hexagon head bolt (Accessory 7))

Insulation for fitting

(Accessory 2))

Clamps

(Accessory10))

Flare nut

Gas

pipe

Liquid

pipe

Nitrogen

Refrigerant

piping

Part to be

brazed

Taping

Pressure-reducing valve

hands

valve

Nitrogen

Fig. 11

Central drain pipe

100mm

or more

(Install with a downward slope of at least 1/100)

Fig. 12

Water supply port

Fig. 13

1 2 3 4 5 6 7 8 9 10 11 12 13

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Daikin FXHQ32MVE Manual de instalación Pagina 8

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