Which way does my filter drier go?
Which way does my filter drier go?
When the piping arrangement results in excessive stress on refrigerant line, the filter drier should be supported by a suitable bracket. Install with arrow pointing in direction of flow (toward compressor). Reverse flow may cause internal damage.
What is the difference between a strainer and a filter drier?
Strainers have no desiccant inside to absorb the moisture, they are simply filters used to prevent solid particles. Filter driers need to be able to trap and contain moisture, acid, contaminants and wax from circulating throughout the air conditioner.
What is inside a filter drier?
The most common materials used in filter drier construction are activated alumina and molecular sieve. Activated alumina is used for removing organic acid molecules from refrigeration systems. Activated alumina is often used in both liquid and suction line filter driers for acid cleanups after system burnouts.
Which is the correct position for a filter drier?
The position of the drier should be as vertical as possible with the flow in the downward direction. This position will also allow the drier to act as a liquid seal for the capillary tube, to ensure pure liquid refrigerant flow through the capillary tube. If the drier must be installed horizontally,…
How does a one way filter drier work?
Some models for heat pumps might have a bi-directional filter and the arrow will point both left and right. But in this case we have a single direction, one way filter drier. On the outside we have a powder painted surface which just prevents corrosion and the black gloss finish just gives it a premium look at feel.
How is a drier used in an air conditioning system?
Filter Driers Filter driers are devices used in a HVAC system that are a combination of filter and dryer (or drier). 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.
Where do the arrows go on a filter drier?
On the side of the filter drier you’ll find an arrow, this indicates the direction of refrigerant flow. Some models for heat pumps might have a bi-directional filter and the arrow will point both left and right. But in this case we have a single direction, one way filter drier.
Where does a filter drier go in a refrigeration system?
Position of a filter drier This is a very typical model filter drier and we’ll find these installed in the liquid line of the refrigeration system, between the condenser and the expansion valve. We’ve covered how expansion valves (Thermal and electronic), heat exchangers and refrigerants work in our previous tutorials, do check those out.
Where are the ports on a filter drier?
Usually no ports are available at the inlet or outlet of the liquid line filter drier. Filter driers are designed to have an extremely low pressure drop across them even while filtering down to 25 microns and trapping both moisture and acids.
How can you tell when a filter drier is restricted?
Filter driers often tell you when they are restricted. If a liquid line drier becomes severely restricted it begins to actually meter refrigerant. What happens when the expansion valve meters liquid refrigerant? The refrigerant cools the evaporator. The same effect occurs within a clogged drier. The drier becomes cold.
When to replace a liquid line filter dryer?
If one end of the filter drier is a markedly higher or lower temperature than the other end, it is likely that the liquid line filter drier is clogged and may need to be replaced in order for the unit to work properly again.
