Carrier Geothermal | Domestic Hot Water

[andym]

I recently had a Carrier geothermal system installed in my new home. The question I have is about it producing hot water. There are 2 pipes that connect to my hot water heater going into the system, HWG in and HWG out. The HWG in comes from the bottom of the hot water heater and the HWG out goes to top of the hot water heater. I've been unsure if the system is producing hot water like it should. The top pipe comming out of the geothermal system is always either the same temperature or colder than the pipe going in. I put a temperature prope on it to test it. Would this be right, shouldn't the top pipe coming out be hotter than the pipe going in? I tested it for several days now all throughout the day and this seems to be happening, even without running any hot water. It seems though that when we do run hot water, the pipe comming out of the system going to the hot water heater is very cold, yet the pipe coming in is hot to the geothermal system. Is this normal, and how else can I verify that the system is making hot water?

[Tony]

Hi Andy I am not HVAC person but I do design and build cold packages. So let me start to surprise must out there Carrier Mfg. are bunch of scumbags by calming they system to be Geothermal, Geo stand for when system uses Ground water for cooling or heating, what you have is heat recovery unit attached to your AC/Heat pump whichever. Discharge of compressor is pipe through heater exchanger in the some kind insulated tank, usually piping goes in and out on bottom of tank your city water should be pipe in on side of tank but close to bottom the water outlet from this tank should be close to top or on top this will be preheated water that feed you hot water heater going in this water temperature will be , how hot? it depend on your AC system if is running and how much of heat load is on it but it definitely should be warm and not cold unless your AC unit is being shut down for while. Tony

[Bubba]

Keee-Rist! Could someone Pleazzzze bring the translator back in? Bubba

[Reinhard]

[e-mail] wrote in news:1185659967.919497.85540 @b79g2000hse.googlegroups.com:

The geo unit has a de-superheater - it uses waste heat from the compressor to heat water. The de-superheater just pumps water from the hot water tank through fittings on the compressor and back to the tank. This circulating water picks up some heat from the compressor so the return pipe should be a bit warmer than the supply line. You only get heat when the geo unit is working and there is excess heat after the house heating demand has been met. In the winter there will be times when there is no excess heat. In the summer there is always excess heat when in cooling mode. The only way to test if you are getting heat from the geo is to have the geo unit working for a while. It doesn't matter what the setting of the tank electrodes are

- if the geo unit has excess heat it will go to the tank regardless of what the tank is doing.

It is possible that the pump on the de-superheater is not working but I don't know how to test that.