Daikin FVQ140CVEB Manual de instalación descargar pdf (Pagina 13)

12 English

• Braze the refrigerant piping only after having nitrogen flow through the pipe and substituting nitrogen for air

(Refer to Fig. 17). Once this is completed, connect the indoor unit with flares (Refer to Fig. 13).

1. When brazing after having nitrogen flow through the pipe and substituting nitrogen for air, it is appropriate

to set the nitrogen pressure to about 0.02MPa with a pressure reducing valve. (Refer to Fig. 17)

2. Do not use flux when brazing refrigerant piping. Use the phosphor copper brazing filler metal (BCuP-2: JIS

Z 3264/B-Cu93P-710/795: ISO 3677) that does not require flux.

(Chlorine based flux is extremely harmful to refrigerant piping systems. It will corrode the refrigerant piping

and if it contains fluorine it will deteriorate the refrigerating oil.)

3. When performing the leakage test for the indoor unit and inter-unit piping after the indoor unit is installed,

be sure to refer to the installation manual for the indoor unit or technical guide for the leakage test pressure

and the refrigerant piping installation.

4. Shortage of refrigerant due to air purge or forgetting the additional refrigerant charge may cause

malfunction of the unit (does not sufficiently cool or heat).

For installation of refrigerant piping, be sure to refer to the installation manual for the outdoor unit or the

technical guide.

CAUTION

• Do not use anything oxidation inhibitor or the like when brazing. (Residues may cause clogging of pipes or

damage to parts.)

6. DRAIN PIPING WORK

1. Rig the drain piping.

Carry out drain piping to ensure proper drainage. Also, observe the following to prevent leaks.

CAUTION

•

To avoid force on the drain hose of the indoor unit, make sure to fix the drain pipe such as to bundle it to the

refrigerant pipe as shown in Fig. 18. This is to prevent the drain pipe from coming off and/or avoid bad

insulation. The drain pipe must be sloped downward with a gradient of 1/100 from the drain pipe connection in

the unit.

• The drain pipe may be clogged if water accumulates in the drain pipe.

• Condensation on the pipe may occur and cause water leakage. Therefore, make sure to insulate the pipe

at the following two places.

(1) All piping in the room and inside the unit.

Nitrogen

Pressure-reducing

valve

Hands

valve

Taping

Refrigerant piping

Part to be

brazed

Nitrogen

Fig. 17

Gas pipe

Liquid pipe

Fan housing

Bottom frame

Anchor hose here.

Drain pipe (Procure in field.)

Vinyl chloride pipe (normal diameter 20mm)

Indoor unit drain hose

Through-hole for piping

Fig. 18

3P249378-4D_FM6.book Page 12 Thursday, December 15, 2011 10:00 AM

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 31 32

Comentarios a estos manuales

Sin comentarios

Daikin FVQ140CVEB Manual de instalación Pagina 13

Comentarios a estos manuales

Relacionado con productos y manuales para Acondicionadores de aire del sistema de división Daikin FVQ140CVEB