Dan Jordan's posts

Hello .. I have an old solar hot water system.. it appears that my differential controller is screwed up (just ordered the SunEarth SETR 0301)..it failed to kick my pump on and the pressure built up high enough to cause the tubing (copper?) in one of the collector plates to spring a leak,,,

IS THERE SUCH A THING AS "STOP LEAK" FOR SOLAR PANEL

my roof is real high, and real steep.. I'd hate to have to service(i.e. resweat a piece of copper up there)

Hola,
In the past I have ran RV Anti Freeze in my Closed Loop Solar system..QUESTION:: Is the heat gained from each fluid comperable?  or is the Glycol mix that you do a 50/50 mix on noticebly better for hot water heat exchange thank RV Anti Freeze which is basically watered down Propy Glycol??

I have an old Solar Differential controller.. I bought new thermisters and it is now shutting on and off properly.. I THINK.. During the daylight hours should the controller signal the pump to shut off when cloud cover rolls in? it seems like if the water temp in the tank is greater than the heating fluid temperature.. then the pump should shut down ?? seems like sending fluid that is cooler than the water in the heat exchanger thru is counter productive.. or is my controller just not that sensitive??  would a newer on function in the way i have just described??

I have some old controller made by Suntronix Inc.. I think they are no longer in business.. but it appears that the controls are working.. I shorted the collector plate sensor connections together at the controller and the heat fluid pump kicked on.. I then measured the wiring to the collectors and they read open.. the sensor in the storage tank reads about 16K ohms.. I should then probably try to find a 16K ohm sensor if it doesnt work after climbing on the roof and re-splicing the collector sensor wires..?...??
I am psyched to get this thing up and running.. the gas company here is ticking me off !!

Hello.. I bought a house last year that has an active/closed loop system.  I have finally gotten the darn thing somewhat operation. replaced the Grunfos Pumps.. flushed and refilled the system..It appears that one of my temperature sensors are possibly bad.. The heating fluid pump will not automatically swith on.. I will check the wiring this evening but the system is fairly old and I am wondering if any available sensor would work with my controls.. or are they more specialized and will only funtion properly with the same manufaturer  ? thanks