Outdoor Wood Furnace Info
All-Purpose OWF Discussions => Advanced Electronics => Topic started by: E Yoder on August 09, 2017, 06:47:18 AM
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Wonder if anyone has ideas about how to tie a OWB into a communicating stat/air handler. We had one a while back that we had to purchase a $200+ circuit board from Carrier to convert to conventional 24v signals to be able to shut off the compressor. Wish there was an easier way.
Thanks.
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Wonder if anyone has ideas about how to tie a OWB into a communicating stat/air handler. We had one a while back that we had to purchase a $200+ circuit board from Carrier to convert to conventional 24v signals to be able to shut off the compressor. Wish there was an easier way.
Thanks.
What exactly do you want the OWB to do? Prevent water over-temp irrespective of house thermostat state?
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We were trying to break the signal to the outside unit (compressor, 2-stage) and reroute it to a circulator. Basically adding another heat source. The problem is all the signals were digital.
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We were trying to break the signal to the outside unit (compressor, 2-stage) and reroute it to a circulator. Basically adding another heat source. The problem is all the signals were digital.
And dual or triple heat stage thermostats can't give you what you need?
Or do you want the OWB stage to only be available if the water is up to temp?
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It would be nice if it would switch over to the compressor when the wood furnace temperature drops. But the biggest problem with communicating systems is the thermostat, air handler and compressor all communicate with each other by digital signals and you can't do anything outside of what is written into the "brains" have been pre-programmed to do without fault codes showing up.
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What I mean is, an IQ Drive system has an IQ drive stat, air handler, outside unit, all talking between circuit boards usually with variable fans, multi stage compressors, etc. A normal two or three stage stat can't be tied in. No 24v. outputs anywhere, and breaking the actual 220v. power going into the compressor would show up I think as a malfunction.
I think any new function would have to be written into the code. But I'm not a computer person and I doubt Trane or Carrier would tolerate anyone but them changing any of that.
Maybe I'm missing something.
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What I mean is, an IQ Drive system has an IQ drive stat, air handler, outside unit, all talking between circuit boards usually with variable fans, multi stage compressors, etc. A normal two or three stage stat can't be tied in. No 24v. outputs anywhere, and breaking the actual 220v. power going into the compressor would show up I think as a malfunction.
I think any new function would have to be written into the code. But I'm not a computer person and I doubt Trane or Carrier would tolerate anyone but them changing any of that.
Maybe I'm missing something.
I’m betting your correct on that.
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Forget about the 101010101.
Just wire in a relay to power the circulator. Relay is activated by compressor voltage when it's running. Relays use minimal amps.
May need to wire in a drop out relay so it does not back feed ??not sure without schematics
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Yes, we had discussed that, and I think there are sensors that it can tell if the compressor is running. Have you tried one? It might work anyway, I'm not disagreeing. So many things we've discussed we end up scrapping because it knows something is wrong.
I agree tieing into digital is not the right route but rather going beyond it into the actual 220 voltage.
We had also discussed at dealer meeting about using the 220 strip heat to bring on the pump relay. I'd much prefer to stay in the control wiring...
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I was told on the IQ Drive system will flash on the t-stat if the compressor isn't running.Some can tell you when it's low in refrigerant. ....
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Sounds like fun, not.
Several years ago upgraded corn dryers and I added a third party auto controller for moisture. Continuously checks moisture content and is temperature corrected. First had to build a sampling chamber, originally you placed it on the bottom of an auger tube and cut a section of flight out, thats crap. The supplied sampling chamber uses a very small auger that two pieces of cob at the same time can plug.
Mounting it and getting a sampling chamber was the easy part, out of all the possible wiring options our dryer was mot listed in the third party manual, took a bit of research on that one.
So basically you turn the dial and set the desired moisture it discharges at, then it either speeds up or slows down the metering rolls fifteen percent if the moisture isn’t at the desired set point. Uses a bank of 3PDT relays, I changed those out and the sockets for 4PDT and off the fourth pole I ran wires to the control building and added LEDs that could be seen from the house. Green all is good, Yellow is running on slow mode (corn is too wet), White is on fast mode (corn is too dry) red if the dryer shuts down or if even on slow it’s 2 points wetter than set.
The relays control whether the juice that goes to the SCR is running straight thru or one of the POTS that speed it up or slow it down. I used the exact same make and model that came in it originally, 5V coils even but I’m just using ones with an extra pole. One of the problems known with this system is sometimes a relay just drops out, it will still close but it’s such low voltage and amperage even with closed contacts the circuit isn’t complete, sometimes if your careful you can find which is acting up by very gently opening the control panel and just touching it with a finger. Eventually started replacing them with a lot more expensive ones that are meant for micro voltage, if I shop around I can get two of the micro voltage ones for what I was paying for a whole box of the OEM’s. Thought about 5V solid state relays as well but those are single throws.
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Fun....
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Yep, took years but finally got all the bugs out, now it just runs and runs till it runs out of wet corn to dry.
Gonna work next on using a transponder and a VSD to control the auger speed feeding a pneumatic grain mover. Too little grin flowing int out and the air pressure drops because the corn is moving thru too fast, too fast and you get more damage, too much corn and pressure rises as the air “piles up” behind the corn, eventually if the pressure rises too much it plugs. Ideal is 6 pounds of air pressure on a 4” steel pipe. Shouldn’t be too hard to get a VSD to change speeds on the supply auger to keep the air pressure right around 6 pounds. Challenge is going to be getting the proper delay programmed in as the corn also has to go thru a grain cleaner first, then on the longest run even then air pressure won’t increase right away, but can’t be too long a delay or a wet slug of corn could cause a plug before it can be slowed down enough. Might see if I can have large buffer on speeding up but not so much on slowing down or even have it shut off momentarily if it hits 6.5 pounds.