Daikin BRC1E51A7 Installation Manual download pdf (Page 14)

12 English

CAUTION

For local insulation, be sure to insulate local piping all the way into the pipe connections inside the

machine.

Exposed piping may cause condensation or burns on contact.

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 influence 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 you 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, connect the indoor unit with a flared

or a flanged connection.

Pipe holding

plate screw

(2 points)

Gas piping

Liquid piping

Procedure for thermal insulation of liquid-side piping

Insulating material for

joints (9)(accessory)

Flare nut connection

Piping insulation

material (main unit)

Main unit

Clamp (4)

(accessory)

Sealing pad

(11) Medium-1

(accessory)

Sealing pad

(12) Medium-2

(accessory)

Clamp (4)

(accessory)

Piping insulation

material

(Field supply)

Procedure for thermal insulation of gas-side piping

Insulating material for

joints (8) (accessory)

Piping insulation

material (main unit)

Turn seams up.

Flare nut connection

Piping insulation

material

(Field supply)

Turn seams up.

Do not have the

clearance.

Do not have the

clearance.

Wind around the

pipe until top of the

flare nut connection,

beginning at the

base.

Wind around the

pipe, beginning at

the base.

Do not expose the

pipe in order to

prevent the vapor

condensation.

Do not expose the

pipe in order to

prevent the vapor

condensation.

Tighten the portion

where overlapped

by the piping

insulation material.

Tighten the portion

where overlapped

by the piping

insulation material.

Fig. 17

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 31 32

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Daikin BRC1E51A7 Installation Manual Page 14

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