EcoRenovator - View Single Post - DIY thermal differential controller (solar hot water pump controller)

AC_Hacker · 09-12-09, 12:01 AM

Daox,

Great idea on the controller.

There is a variant on the differential controller idea... it's a controller which is specifically for hydronically heated homes. I'm not so sure what the general name of the controller is, but the feature is that it monitors the temperature outside the house as well as inside the house. Hydronically heated houses have a very large thermal mass (AKA: concrete radiant floor). This thermostat can sense the temperature drop (or rise) before the inside sensor can and helps prevent undershoot and overshoot conditions.

I'm not so much of a circuit hacker, but I suspect that the 'adjustable offset and hysteresis' features could apply tho your project and with some tuning could apply to this type of thermostat as well.

Bst Regards,

-AC_Hacker

09-12-09, 12:01 AM	#8
AC_Hacker Supreme EcoRenovator Join Date: Mar 2009 Location: Portland, OR Posts: 4,004 Thanks: 303 Thanked 723 Times in 534 Posts	Differential Controller... Daox, Great idea on the controller. There is a variant on the differential controller idea... it's a controller which is specifically for hydronically heated homes. I'm not so sure what the general name of the controller is, but the feature is that it monitors the temperature outside the house as well as inside the house. Hydronically heated houses have a very large thermal mass (AKA: concrete radiant floor). This thermostat can sense the temperature drop (or rise) before the inside sensor can and helps prevent undershoot and overshoot conditions. I'm not so much of a circuit hacker, but I suspect that the 'adjustable offset and hysteresis' features could apply tho your project and with some tuning could apply to this type of thermostat as well. Bst Regards, -AC_Hacker