Daikin FXDQ-SPV1, Engineering Data

FXDQ-SPV1 EDTFVN391825

31

3P347455-11H

6

(2) When the pipe work is completed, please confirm 

     whether any air is leaked out.

Heat insulation of the pipe on the liquid side

Heat insulation piece for 

the pipe (Main unit side)

Heat insulation piece (3) for the 

connector (Accessory)

Flare nut connection section

Close firmly to the unit body

The connecting seam 

facing upward

Main unit

Banding tie (9) 

(Accessory)

Heat insulation piece for 

the pipe (supplied on site)

Pipe on the liquid side

Pipe on the air supply side

Heat insulation of the pipe on the air supply side

Heat insulation 

piece for the pipe 

(main unit side)

Heat insulation piece (4) for the connector

(Accessory)

Flare nut 

connection section

The connecting 

seam facing upward

Middle seal (6)

(Accessory)

Close firmly to 

the unit body

Main unit

Banding tie (9)

(Accessory)

Heat insulation piece for 

the pipe (supplied on site)

Wrap on the 

flare nut connector.

Fig. 8

Table 2

Pipe dimension

Angle to be further tightened

Recommended length 

of the tool arm

60 to 90 degrees
60 to 90 degrees
30 to 60 degrees
30 to 60 degrees

About 150 mm
About 200 mm
About 250 mm
About 300 mm

Ø 6.4 (1/4”)
Ø 9.5 (3/8”)

Ø 12.7 (1/2”)
Ø 15.9 (5/8”)

(3) When it is checked that no air is leaked out, please 

     refer to Fig. 8 to properly insulate the pipe 

     connections with heat insulation material.

· 

When carrying out heat insulation work, please use 

   the supplied heat insulation piece (3) (4) for the pipe 

   of the liquid side and the air supply side. In addition, 

   the connecting seams of the heat insulation piece (3) 

   and (4) for the connector shall face upward. (Please 

   use banding tie (9) to clamp both ends.)

· 

Please use the middle seal (6) to wrap the surface of 

   the heat insulation piece (4) for the connector on the 

   pipe of the air supply side. (The flare nut section)

The pipe supplied on site must be heat insulated to the 

connecting section of the pipe. In case that the pipe is 

exposed, condensate can occur, and injury from burning 

can also happen if touched.

CAUTION

· 

Before welding the refrigerant pipe, please firstly carry 

   out nitrogen exchange, or when welding (Caution 2), 

   fill in nitrogen (Caution 1) in the refrigerant pipe, and 

   finally use the flare to connect to the indoor unit.

(Refer to Fig. 9)

CAUTION

1. In case that nitrogen is filled into the pipe when welding, 

    a relief valve shall be used to control the pressure to 

    0.02 MPa (0.2 kgf/cm

2

) (as if breeze flows along your 

    cheek).

2. When welding the connection section of the refrigerant 

    pipe, never use any welding flux. Please use phosphorus 

    and bronze brazing material (BCuP-2: JIS Z 3264/

    BCu93P-710/795: ISO 3677) which does not need 

    welding flux. (In case that any welding flux containing 

    chlorine is used, the pipe can be corroded; and in case 

    that any welding flux containing fluorin is used, the ester 

    oil or ether oil can be deteriorated, and the refrigerant pipe 

    system can be further influenced.)

Welding position

Relief valve

Wrapping

Nitrogen

Nitrogen

Refrigerant pipe

Manual

valve

Fig. 9

7. DRAIN PIPING WORK

CAUTION

· 

The connecting interface of the water drainage pipe 

   varies depending on different types, so please confirm 

   the name of the type, and use the installation method 

   suitable for the type.

(1) Install the water drainage pipe.

Case for Model FXDQ ~ SPV1

Connecting interface of 

the water drainage pipe

Refrigerant pipe

Water drainage port for maintenance

(With a rubber plug)

· 

When installing the water drainage pipe, ensure that 

   the water drainage is smooth.

· 

The diameter of the water drainage pipe shall be larger 

   than or equal to that of the connection pipe (polyethylene 

   pipe; pipe dimensions: 20 mm; outer diameter: 26 mm).

   (Not including the riser pipe)