The high side, or discharge line, will be the line connected to the compressor from the bottom or lower position. It will not be wrapped in insulation and will be warm to the touch. This is where freon exits the compressor as a liquid.

Is the liquid line the low side?

LIQUID LINE - Pipe or hose connecting condenser to expansion valve. LOW SIDE - That portion of system from orifice in expansion valve through evaporator line or lines through compressor service valve to compressor reed valve. Also called suction side. liquid, increases the liquids boiling point.

Which side is liquid line?

The larger line typically carries a cool gas and is insulated. This is commonly referred to as the suction line, but it is also called the return line or vapor line. The smaller uninsulated line typically carries a warm liquid. It is most often called the liquid line.

What is discharge line?

A discharge line is a section of piping where the pressure is higher than atmospheric pressure (e. g. Pump system).

What is the discharge line in AC?

Discharge gas lines (often referred to as hot gas lines) allow refrigerant to flow from the discharge of the compressor to the inlet of the condenser. Undersizing discharge lines will reduce compressor capacity and increase compressor work.

Do you insulate the suction or liquid line?

This is called the “suction” pipe and is typically the larger of the two pipes. There is no need to insulate the smaller, warmer copper pipe, often called the liquid line, because not insulating this line allows it to shed heat which is exactly what you are trying to do with an AC system.

Is the liquid line high pressure?

The high pressure refrigerant flows to the condenser by way of the Discharge Line. The condenser changes the high pressure refrigerant from a high temperature vapor to a low temperature, high pressure liquid and leaves through the Liquid Line.

What can cause high discharge pressure?

One common cause of high discharge pressure is the cooling medium (air or water) flowing across the condenser: either there is not enough or the temperature of the cooling medium is too high. This is normally easy to identify with a simple visual inspection of the condenser.

What are the three major refrigerant lines?

The suction line connects the evaporator to the compressor, the discharge line connects the compressor to the condenser, and the liquid line connects the condenser to the expansion device.

Why is my high side pressure high?

If your condenser has blockage or restriction of air flow, the high pressure side reading would be high while the low side readings would drop over time. To rectify this problem, you should remove and blockage and clear any debris. After removing the debris, check the readings again.

Why is my liquid line pressure so high?

High compression ratios from the low evaporator pressure will cause high heat of compressions, thus high discharge temperatures. High superheats. Both evaporator and compressor superheats will be high. This is caused by the TXV, evaporator, and compressor being starved of refrigerant from the liquid line restriction.

What is high discharge pressure?

Discharge pressure (also called high side pressure or head pressure) is the pressure generated on the output side of a gas compressor in a refrigeration or air conditioning system. An extremely high discharge pressure coupled with an extremely low suction pressure is an indicator of a refrigerant restriction.

How do you fix high head pressure?

Plugged up condenser coils is another big problem commonly encountered with high head pressure. That is also probably the easiest one to solve, provided you have a water hose nearby. A little coil cleaner and spraying water (from the inside out) will solve that problem and drop the head pressure to normal levels.

What causes a suction line to freeze?

Why Frost or Ice May Appear on an Air Conditioning Refrigerant Suction Line. Refrigerant charge level: Improper refrigerant charge (too low a charge of refrigerant in the A/C system can, for a while, lead to too-low temperatures in the coil which will then cause frost or ice build-up on the suction line.

Why is my high side line cold?

Most likely problem is a clogged drier. If one is not used on your system the next best guess is a clogged expansion valve. I would make sure they install a new drier during the repair.

How do you fix refrigerant lines?

0:371:54How to Repair an Air Conditioner Freon Leak - YouTubeYouTube