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Thread: float switch

  1. #1
    Join Date
    Sep 2010
    Location
    miami,fl.
    Posts
    666

    float switch

    we service a large chain on stores similiar to cvs in south fl. they are changing units to new trane package units well the installation company ???? is installing a regular float switch on the drain line. and additionally installing another water level sensor clip to the drain pan, with a probe sensing the water. not sure of the brand but its white with like a bull dog in the picture. its something like guard dog. the issue that im seeing is that once they get the slightest moisture blown on the probe it shuts the unit down doing its job. with the pan and drain clean/clear. my question is anyone seeing these things. or maybe they are for residential applications maybe commercial has to much turbulance in the evap section??????? loooking to hear others experience.

  2. #2
    Join Date
    Apr 2012
    Location
    Paper Street Soap Company
    Posts
    2,304
    Houston and other cities new code requirements mandate floats on RTU units.

    Convenntional float switches will get you red tagged everytime.

    The switches with the sensor probes are the only one they're accepting and they suck.

    Atleast in that application.

    It has to be in the pan, not in the drain line.

  3. #3
    Join Date
    Sep 2010
    Location
    miami,fl.
    Posts
    666
    Quote Originally Posted by Six View Post
    Houston and other cities new code requirements mandate floats on RTU units.

    Convenntional float switches will get you red tagged everytime.

    The switches with the sensor probes are the only one they're accepting and they suck.

    Atleast in that application.

    It has to be in the pan, not in the drain line.
    here in miami a float switch installed on the drain line for rtu's is a red flag also but if you use the clip on float switch to the main drain pan its allowed. fully understandable will activate in any event of an overflow of water. was wondering if anyone had any issues with that probe type. its similiar to a water level probe in an ice machine once it gets slime build up it tells the ice machine it has water closing the circuit to ground..

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