A/C Unit Filters
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  1. #1
    Join Date
    Jan 2007
    Location
    Ontario, CANADA
    Posts
    24

    A/C Unit Filters

    Sometimes there is a Filter that comes with the Carrier condensing unit. Whats it for? Again some guys dont install it and then sometimes they do. why?


    Why are some of the refrigeration lines looped before connected to the A coil?

  2. #2
    What????????????????

  3. #3
    Join Date
    Mar 2005
    Location
    Indianapolis, IN
    Posts
    241
    >Sometimes there is a Filter that comes with the Carrier condensing unit.

    Dryer. The A/C dryer removes water and some dirt from the refrigerant.

    >Again some guys dont install it and then sometimes they do.

    Everytime system is opened, new dryer should be installed.

  4. #4
    Join Date
    Dec 2006
    Posts
    289
    if we're talking about air filters, and not dryers, then the reason is going to be that the unit is located close to an opening on the building (and the discharge vent is a very short run) and the filter is added to keep any outside air from blowing back into the discharge if there are no dampers on either the end of the vent, or in the vent by the unit.
    For instance, Im currently stationed in downtown Manhattan, and on some units (usually located on splits where the condener is located near the opening of a louver) filter racks were installed after september 11th, because the amount of dirt and debris in the air (even months later) from the world trade center, and also all the new construction around there. When the unit was off, air would come into the discharge duct and the dirt and debris in the air would clog up the coil.

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