Tekmar and GSHP
I use tekmar stats and controls with my Knight Boiler and would also like to use them with my GSHP. My heat pump supplies heat to five zones of IFR and chilled water to two Unico units. One Unico is currently using a 544 for the cooling and connects to the Knight via a zone manager 336 and BRM 420.
I was looking to use two 336 zone managers for the five heat zones (with 541 stats) and the other cooling zone (with a 544) and a 420 BRM on off/on mode to control the GSHP.
I am having a little trouble getting my head around this. Will these components do what I am describing and how do I handle the reversing valve with the 420 (not sure I can).
Any help is appreciated.
tekmar cooling
unfortunately tekmar does not make a real cooling control. I have done such things though with a 152 which is a two stage setpoint control, the #1 sensor/relay is used as an outdoor sensing cooling interlock and the #2 sensor/relay is used to maintain a cooling setpoint in your buffer tank by cycling the heat pump when cooling is enabled by relay #1. relay #1 also is used as an interlock for the heating demand from the 420 to prevent it from giving a heating demand while cooling is going on.
tekmar has had some prototype geo controls in their mechanical room operating for at least 5 years now.
these days i've been using HBX controls for geo heating & cooling applications. it's much easier to use a purpose built control than trying to invent something in the field. check out their CPU-500
http://hbxcontrols.com/products/cpu-0500.php
cooling controls
Thanks for your help. Will check out HBX
Contact Terra-Therm in MN
Terrra-Therm
www.TTherm.com for some ideas or controls. They have had controls built to their specifcations when needed, tekmar, and others
They have a control board that allows the GSHP, boiler/furnace and circulators to work together. The 'geothermal hydronic control module' which I think would do what you are asking for.
Contact them as I do not have all the specific information. They are great people to work with.
Minnesota Wayne
This post was edited by an admin on May 22, 2010 9:26 AM.
Contact Terra-Therm in MN
sorry, double post
Minnesota Wayne
This post was edited by an admin on May 22, 2010 9:25 AM.
