What is the function of filter drier in refrigeration system?

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.

Where do you put a filter drier on a heat pump?

Standard driers are often installed directly ahead of the expansion device – one in the outdoor section and one in the indoor section. Another common design is to locate both driers in the outdoor section, where they are easier to service.

Can you put a suction line drier on a heat pump?

THE SUCTION LINE DRIER LOCATION – A filter-drier should be installed in the suction line to clean up a heat pump after a severe hermetic motor burnout. In some cases, it may be necessary to re-pipe the suction line so the drier is located outside the cabinet.

What are the two types of filter driers?

There are generally two main types of liquid-line driers. One is the straight-through sealed type and the angle replaceable core type. Both types offer protection in heating and cooling cycles and use the singular filter drier.

Should suction line drier be removed?

In air conditioning, we rarely install suction driers unless we know there is acid contamination, such as in the case of a compressor burnout. Once the acid is no longer present, return and remove the suction filter/drier and install a standard liquid line drier or core.

Should a sight glass be wet or dry?

The drying of the system should be con- tinued until the indicating element stays Medium Blue. The moisture change level of the refriger- ant in Parts Per Million (PPM) for the vari- ous Sight Glass moisture indicator colors is shown below.

What happens if you put a filter drier in backwards?

When installing a new filter drier, an arrow on the filter drier’s housing will indicate which direction refrigerant is designed to flow. If installed backwards, the filter drier will become useless. Overheating may scorch the internal filters, drying agents, and other important parts of the dryer.

What type of drier is used in the liquid line on heat pumps?

bi-flow drier
In a heat pump or reverse-cycle application, a liquid-line bi-flow drier is the best choice.

How many total kinds of filter drier are there?

In the case of filter driers, there are three most commonly used desiccants, and these are molecular sieve, activated alumina, and silica gel.

What is the material inside the filter drier called?

desiccant
Receiver/driers contain a material called desiccant. The desiccant is used to absorb moisture (water) that may have gotten inside the A/C system during manufacture, assembly or service. Moisture can get into the A/C components from humidity in the air. This is the “drier” function of the receiver/drier.

When should a suction line drier be used?

These suction line filter-driers include protection from moisture and organic or inorganic acids, resulting from burnouts, or chemical changes in the system refrigerant or oil. They’re especially suited for system cleanup after a burnout, or when major work has been performed on the system.

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

Temperatures Drop Across the Filter Drier A symptom of a clogged liquid line filter drier is a temperature drop across the filter drier. Filter driers are typically shaped like a hot dog and are about the same diameter.

What does an air dryer filter do?

Filter driers are exactly what they sound like, they are filters. They filter the refrigerant inside the ac system. Filter driers need to be able to trap and contain moisture, acid, contaminants and wax from circulating throughout the air conditioner.

What is a filter dryer?

Filter dryer. A filter dryer is a piece of process equipment used during the filtration and drying phase of a pharmaceutical, bio pharmaceutical or chemical process for an active pharmaceutical ingredient (API) or other compounds production.

What is a refrigerant dryer?

A refrigerant dryer uses a refrigerant circuit and heat exchangers to pre-cool compressed air, refrigerate it to condense the moisture in the air, and then re-heat the compressed air to prevent formation of the condensate on the pipe downstream.

What is a refrigerant filter?

A filter is used to remove any particle such as dirt, metal or chips from entering the refrigerant flow control. The refrigerant flow control device could be thermostatic expansion valve or simply a capillary tube. The filter is sometimes also referred to as a strainer.