Refrigerant Piping - Acson international IM-WM1-0302-ACSON Installationsanleitung

Wall mounted split type air conditioner

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An orifice is used as expansion device in WM301 cooling only unit. It is fixed in the liquid pipe in the indoor unit.

Piping length and 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

07/10

Maximum length, m (ft), L

Maximum elevation m (ft), H 5

Maximum number of bends

Liquid pipe size

1/4"

Gas pipe size

Remark: The refrigerant pre-charged in the outdoor unit

is for piping length up to 7.62m/25ft.

Indoor unit

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.