Question about Little Giant VCMA-15ULT 1/60 HP 3/8" Condensate Pump Model# 554411 with 20'

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VCMA-15 Have a catch pan overflow switch which goes in series with the thermostat circuit, but there are two low voltage wires coming from the pump and these have been connected together since installation 12 years ago. They are obviously for a high level shut down but how can this function if they are wired together. Seems to me they should be in series with pan overflow switch and thermostat. Anyone with first hand experience?

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You should have it wired in series with the wire on the 'R' terminal of the control board to the thermostat. Usually the red wire. This will shut down the complete system if the pump fails. The pan switch should be wired this way also, so they can both be in series with each other.

Posted on May 25, 2011

  • dryearwood May 26, 2011

    The pan switch is no problem for it is two wire, but the high level shut off wires and the float switch wire have been wired together for 12 years operating properly and producing a single wire and I do not understand how a single wire can be put in series. Still puzzled.

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