I have a Water Furnace 4 ton Envision water to air Geo unit with a superdeheater assist for DHW. Looking at the plumbing and the direction of water flow I am not so sure that the superdeheater can be flowing into the electric hot water heater. Can someone explain how it should be plumbed to work? Here is what I see now. At the top of my electric HW tank are two pipes. At the bottom is a drain fawcet that is teed off to a pipe connected to the superdeheater. Cold water from my well enters the electric HW tank at the top and the hot water comes out of the tank through the other pipe at the top. How can water from the superdeheater flow into the tank if no water is flowing out? How can water from the superdeheater flow in if water is feeding in from the well too? Wouldn't it make more sense to have the well water flow into the Geo unit and then out through the superdeheater to the electric hot water tank? I am definetely out of my element when it comes to plumbing etc. Thanks Ed
"desuperheater" Sounds plumbed right. It will pull from the top, but from the tank, not from your supply. Search these forums and you'll see a drawing that keeps getting posted - about once a month.
" How can water from the superdeheater flow in if water is feeding in from the well too? Wouldn't it make more sense to have the well water flow into the Geo unit and then out through the superdeheater to the electric hot water tank?" Don't think of the DSH as adding water like your well does. The desuperheater takes water from the tank and returns an equal amount with a circulator pump. Joe
and, the desuperheater (DSH) only increases the temperature of the water 5-15f degrees each time the water circulates through the DSH. The DSH operates when the geothermal system is running, not just when there is a demand for water. So, the water temperature in the tank will continue to slowly increase as the DSH runs, even when there is no hot water demand.
I would change that slightly to "only when there is no hot water demand". DSH will not overcome temp drop from entering well water. Though it may still be adding BTU's temp in the buffer tank will decrease when DHW is called for. j
I was thinking of OP's comment of "Wouldn't it make more sense to have the well water flow into the Geo unit and then out through the superdeheater to the electric hot water tank?" when I wrote that. But I totally agree with your point. Heating water with a DSH is a slow process.
