Filter driers are usually installed in the liquid line of a dry-expansion refrigeration system, where they have a dual function. First, they trap coarse particulate contamination and copper shavings, and second, they capture any moisture present in the system.

How do I know if my liquid line filter drier is clogged?

How can you tell if you have a clogged liquid line filter drier? If there is a noticeable temperature drop from one side of the filter drier to the other, this means that there is a pressure drop. Remember that temperature follows pressure and temperature is something that we can measure on the outside of the tubing.

What will a liquid line filter drier remove from the system?

The Emerson EK-164 liquid line drier shown below is able to remove moisture and acid from the liquid refrigerant. It can also remove particles that are bigger than 20 micron from the refrigerant system.

How can a technician determine when a filter drier is stopped up and needs changing?

How can a technician determine when a filter drier is stopped up and needs changing? The pressure drop will exceed 2 psig.

What is a common symptom of a severely restricted filter drier?

A starved evaporator from the liquid line (filter drier) restriction will cause high superheats. High compression ratios from the low evaporator pressure will cause high heat of compression, thus high discharge temperatures. This is assuming there’s still some mass flow rate of refrigerant through the system.

What is a liquid line drier used for?

Filter driers are usually installed in the liquid line of a dry-expansion refrigeration system, where they have a dual function. First, they trap coarse particulate contamination and copper shavings, and second, they capture any moisture present in the system.

Do you need a filter drier?

A Filter Drier is an important part of an air conditioning system. A Filter Drier is so important that manufacturers normally supply one to install with a new home comfort system. Absorb system contaminants, such as water, which can create acids.

How often should a filter drier be changed?

All filter driers should be replaced every 2 years or by manufacturer’s recommendation. The Receiver Drier’s function in an automotive a/c system is to filter foreign material, remove moisture from refrigerant and to act as a reservoir to supply liquid refrigerant to the TX valve.

How much does a filter drier cost?

The price for replacing your AC refrigerant filter drier is roughly the same, ranging between $700 to $900.

Can a filter drier be installed vertically?

Suction Line Filter-Driers and Suction Filters may be installed either in a horizontal or vertical position. If the vertical position is used, the flow should be downward to prevent oil trapping. Always install the unit with the flow direction as specified on the product label.

How long do filter driers last?

All filter driers should be replaced every 2 years or by manufacturer’s recommendation. The Receiver Drier’s function in an automotive a/c system is to filter foreign material, remove moisture from refrigerant and to act as a reservoir to supply liquid refrigerant to the TX valve.

What is the reason for filter drier sweating in refrigerator?

The restricted flow of refrigerant causes abnormal temperatures throughout the system. The evaporator and compressor areas become hotter than normal, while the condenser and liquid line cool dramatically. A serious filter dryer clog can cause sweat or even frost to form on the outside of the liquid line.

What is the purpose of a filter drier in an air conditioning system?

It is important to locate a filter-drier in a refrigeration system. Its role is to remove moisture from the refrigerant and lubricant by absorbing and retaining moisture deep within the desiccant granules.