Hey guys,

I responded to a arena that had a high level occur in the chiller. After getting the plant back online I started to investigate and came across the following. There are 3 sources in which liquid can enter the chiller.

1) Liquid line solenoid
2) Liquid condensate from the snow melt pit heat exchanger
3) Liquid condensate from the underfloor heat exchanger.

The attached pic refers to #3, the underfloor. I have ruled out the others. You can see from the pic that there is a Phillips float valve and the outlet is frosted (right back to the chiller). Normally the valve opens only when the float is full enough to lift the needle off its seat. It closes shortly after. This is not happening! I can see liquid boiling off in the sight glass and the float is cold, plus the heat exchanger itself is sweating. If the check valve is leaking is it possible for the liquid to pass backwards through the float? If not then it has to be a faulty float. What would be the ideal way to confirm that?

Any thoughts?

PIC - http://passandscore.weebly.com/, float valve is fig 7 from the download.