EcoRenovator - View Single Post - Heat Pump Water Heater

randen · 04-15-15, 04:08 AM

VWHead77

The suction side 20psi is around the pressure I settled with for the HPWH I made for my parents. You can check my post: Another heatpump water heater. by Randen.

It has been purring along nicely for more than a year.

I too had added charge only to get the heat set on the condenser side. I had found by experimentation that running higher pressures didn't increase the heat out-put just increased power draw. I used both a clamp amp meter and a receptical watt meter to tweek the charge. I believe if my memory serves me right its costing my parents about $15/ month This is beating out their costs of $22/month rental coupled with the propane cost to heat the water. They are extremely happy with it. They did notice right away the lower temp of the water as its only about 104 Deg F. Fine for showers. and why would you need hotter.

Is the refrigerant you used propane?? R290.?? That what I had used and that's what the lower suction pressures are about.

Good work on your build.

Randen

04-15-15, 04:08 AM	#52
randen Uber EcoRenovator Join Date: Apr 2011 Location: Strathroy Ontario Canada Posts: 657 Thanks: 9 Thanked 191 Times in 129 Posts	Water heating using stuff from the tool box VWHead77 The suction side 20psi is around the pressure I settled with for the HPWH I made for my parents. You can check my post: Another heatpump water heater. by Randen. It has been purring along nicely for more than a year. I too had added charge only to get the heat set on the condenser side. I had found by experimentation that running higher pressures didn't increase the heat out-put just increased power draw. I used both a clamp amp meter and a receptical watt meter to tweek the charge. I believe if my memory serves me right its costing my parents about $15/ month This is beating out their costs of $22/month rental coupled with the propane cost to heat the water. They are extremely happy with it. They did notice right away the lower temp of the water as its only about 104 Deg F. Fine for showers. and why would you need hotter. Is the refrigerant you used propane?? R290.?? That what I had used and that's what the lower suction pressures are about. Good work on your build. Randen Last edited by Daox; 04-15-15 at 08:17 AM..