Refrigerant Piping Work - Daikin FT20FV1M Installation Manual

Wall mounted split type air conditioner

Hide thumbs

Table Of Contents

Table of Contents

Piping Length & Elevation

If the pipe is too long, both the capacity and reliability of the unit will

drop. As the number of bends increases, resistance to the flow of

refrigerant system increases, thus lowering cooling capacity. As a

result, the compressor may become defective. Always choose the

shortest path and follow the recommendations as tabulated below:

Model

Maximum length, m (ft), L

Max. elevation, m (ft), H

Max. number of (90˚) bends

Liquid pipe size

Gas pipe size

Remark: The refrigerant pre-charged in the outdoor unit is for piping length up to 7.62 m/ 25 ft.

Piping Works

•

Do not use contaminated or damaged copper tubing. Do not

remove plastic, rubber plugs and brass nuts from the valves,

fittings, tubings and coils until you are ready to connect suction

or liquid line into valves or fittings.

•

If any brazing work is required, ensure that the nitrogen gas is

passed through coil and joints while the brazing work is being

done. This will eliminate soot formation on the inside walls of

the copper tubings.

•

Cut the connection pipe with a pipe cutter.

•

Remove burrs from cut edges of the pipes with remover.

Hold the end of the pipe downwards to prevent metal chips from

entering the pipe.

•

Insert the flare nuts, mounted on the connection parts of both the

indoor unit and outdoor unit onto the copper pipes.

•

Flare the pipe with extra length above the flaring tool as shown

in the table.

•

The flared edge must be even and not cracked or scratched.

Ø Tube, D

Inch

1/4"

6.35

3/8"

9.52

1/2"

12.70

5/8"

15.88

3/4"

19.05