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Posted by SUNY Cortland Heating Plant on December 13, 2006 at 23:36:02:
We use a McDonald-Miller for level controll on our DA tank. This holds a tight and constant level for us (about 1/2 inch), but the repeated cycling of the switch wears it out in about six months. Does anyone have any sugestions of what else can be used for our level controll. I thought about stagering two MM's about five inches apart, the lower one to turn condensate pumps on and the upper one to turn it off. but i fear that this will add water to fast and drop the DA tank temp and thus limit the oxygen removal. Thanks.