Hitachi RPC-1.5FSR Manual De Instalación Y Funcionamiento página 33

Idiomas disponibles

REFRIGERANT PIPING WORK

13 REFRIGERANT PIPING WORK

For the refrigerant piping work, vacuum pump and refrigerant charge, the details shall be referred to Installation and Operation

Manual of the outdoor unit.

13.1 PIPING MATERIALS

1 The tolerance of refrigerant piping length differs depending

on the combination with the outdoor unit. The details shall be

referred to Installation and Operation Manual of the outdoor

2 Select the piping size from the following table.

RPC-(2.5-6.0)FSR

3 Prepare field-supplied copper pipes.

4 Select clean copper pipes. Make sure there is no dust and

moisture inside.

When installing pipe through the wall,

secure a cap at the end of the pipe.

Attach a cap or

PMML0551 rev.4 - 07/2023 - A10762310A

Liquid piping

Ø15.88 (5/8)

Do not place the pipe directly on the

5 As the new refrigerant (R410A) is adopted, the refrigerant

oil has been also changed, which tends to be affected by

foreign matters such as moisture, oxide film, fat. Perform the

installation work with care not to enter moisture, dust or old

refrigerant into the refrigerant cycle, otherwise the parts such

as expansion valve bite foreign matter and the operation

may be unavailable.

6 Use a pipe cutter to avoid a grind swarf generation for the

pipe cutting work. (Do not use a saw or a grind stone to cut

pipes.) Blow the inside of the pipes with nitrogen or dry air,

to remove any dust or foreign materials before connecting

Attach a cap or

Attach a cap or vinyl bag

with rubber band.