Types of filters
Liquid Line Filter driers :the filter dryer’s job is to keep the system clean and dry so when a technician mentions filter be sure to ask him what type of filter he’s referring to. Filter dryers are designed to remove particles moisture and acid they are normally incorporate with a screen to filter out any debris in the system that could potentially clog the small orifice in the metering device such as TXV expansion valves.
types of debris that are found in refrigeration systems can include dirt, oxide ,carbon ,flux and metallic particles other types of contaminants would include sluggish wax formed by oil break down this type of trash in your system can damage the ceiling ,the walls and bearings and plug metering devices and screens ””in a nutshell that’s what the inline filter does now however if you have a heat pump system before installing the filter you would see an arrow facing left and right meaning you can use that same filter in a straight cool system but if you have a straight cool system you have to have the arrow facing the evaporator inside the house! that is the proper way to install it.