One condensate pump, 2 AC units

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Old 04-30-18, 02:22 PM
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One condensate pump, 2 AC units

I have a single condensate pump and 2 AC units in my basements. The condensate pump's overflow switch is only wired to one of the two units. (I actually have a dehumidifier that's also draining to the same pump.) Everything has been working well, but I feel that this is a (flood) disaster waiting to happen.

What is the right way to wire a single pump with multiple sources?
 
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Old 04-30-18, 02:28 PM
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You would need to add a DPST (double pole single throw) relay into the mix.
The float switch would control the existing unit directly and the relay would need to connect into the 2nd A/C and the humidifier.
 
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