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General Outdoor Furnace Discussion / Re: "Time to load" indicator
« on: February 04, 2015, 09:59:47 PM »
I have a homemade OWB and what I did was to purchase a couple of these.
http://www.ebay.com/itm/221623465322?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
This particular unit only has one 10 amp relay and operates on 12 volts.
My sensors, relays and draft solenoid operate on 12v dc. Powered by a 12 volt, 2 amp pc periphial power suppy. My solenoid sensor is inside the house attached to incoming water line, where I can monitor and also adjust, if desired. I find that I can keep an eye on the temperature and tell when wood is needed.
If you pull up ebay and use these search terms, "temperature controller relay", you'll find many different configurations. Some operate on 110 volts. Some are in celcius. Some have 2 or more relays, which is what you'd probably need to light up 3 different leds. Some of the controllers have built in piezo buzzer alarm, which might be good if you didn't actually want to monitor or was asleep.
I realize these things are made in china but I've tested them and they work fine for me, so far. Truth be told, my guess is most of the electronics we buy in america at inflated prices are probably made in china anyway.
http://www.ebay.com/itm/221623465322?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
This particular unit only has one 10 amp relay and operates on 12 volts.
My sensors, relays and draft solenoid operate on 12v dc. Powered by a 12 volt, 2 amp pc periphial power suppy. My solenoid sensor is inside the house attached to incoming water line, where I can monitor and also adjust, if desired. I find that I can keep an eye on the temperature and tell when wood is needed.
If you pull up ebay and use these search terms, "temperature controller relay", you'll find many different configurations. Some operate on 110 volts. Some are in celcius. Some have 2 or more relays, which is what you'd probably need to light up 3 different leds. Some of the controllers have built in piezo buzzer alarm, which might be good if you didn't actually want to monitor or was asleep.
I realize these things are made in china but I've tested them and they work fine for me, so far. Truth be told, my guess is most of the electronics we buy in america at inflated prices are probably made in china anyway.
2
Plumbing / Grundfos UPS Pump specfications
« on: November 27, 2014, 06:14:41 PM »
I'm building a OWF and currently gathering the pieces. My boiler will be located 50 feet from dwelling and at the same level. I purchased a Grundfos pump and upon reading the owners manual it says that a minimum inlet pressure is required for operation. Or place the pump lower than the boiler. Best I can do is place the pump just below the water level, which is around 3 feet. Other than raising the boiler to get pressure I see no other way this will work. Or maybe I'm misunderstanding or maybe I just need to buy a different pump?
By the way if it matters I was planning on an open system but can still do a closed loop. Any info on this would be much appreciated.
Grundfos UPS15-58FC
By the way if it matters I was planning on an open system but can still do a closed loop. Any info on this would be much appreciated.
Grundfos UPS15-58FC
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