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Author Topic: Ebay metering pumps?  (Read 722 times)

olscout99

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Ebay metering pumps?
« on: February 16, 2017, 08:37:24 pm »
I just picked up a working furnace using one of the CK kits due to the owner upsizing to a new Cleanburn. He's been overfiring it something terrible, so I'm on the lookout for a 'new' old furnace to swap parts into, and I'm looking for a way to do a metering pump. He has had an electric motor running a small hydraulic pump, but I'm sure he's running more oil than I want or need to; in addition I think he was running it continuously, and I'm going to run it off of a thermostat. Maybe I'm missing something, but is there a reason that the chemical type metering pumps sold on Ebay wouldn't work if they can be slowed down to an appropriate flow rate? Lots of them are 1-2 gph rating, although the pressures are up there. If I'm not understanding something, clue me in please! I've got all summer to make this work, but I want to start early so I'm not messing with it in the cold.

doug

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Re: Ebay metering pumps?
« Reply #1 on: February 20, 2017, 10:09:13 pm »
what do you mean by over firing? what is running continuously, the burner , the hydraulic pump or both?
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olscout99

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Re: Ebay metering pumps?
« Reply #2 on: February 21, 2017, 11:35:02 am »
The furnace is about 75K btu but he was probably running about triple that or even more with the oil pressure, air pressure and nozzle size he had installed. He had a huge shop to heat, so by 'overfiring' I mean pumping way more btu's through the heat exchanger than it was ever meant to handle. And he had the furnace set to run all of the time when it was switched on, throw a wall switch on the furnace and heater and pumps started and ran until it was manually turned off, he didn't run it through a thermostat so it would cycle. I want my setup to work 'normally' where I set a temp on a thermostat and the furnace kicks on and off to maintain it, so when I move everything over to a 'new old furnace' I need to make changes to the wiring, just not sure what changes I'll need to make.  And not sure if the pump setup he is using will work for me, or how to trigger it, I need to move my drip pan evaporator style heater first then I can get started on modifying and installing the new furnace. The good story is that I posted on CL and have about five or six candidates so far for a replacement furnace, which gives me some options. A front chimney would work great for me, so I'm going to try to hold out for one, hopefully one of my candidates have that.

doug

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Re: Ebay metering pumps?
« Reply #3 on: February 21, 2017, 08:13:45 pm »
mine is a boiler, an aquastat signals the burner to fire and shut off. maybe russ can help you with the thermostat wiring.

after looking at old pictures of my forced air waste oil furnace. there is a fan limit control switch at controlled the burner. it had transformer on it run the 24volt thermostat.
« Last Edit: February 21, 2017, 08:43:20 pm by doug »
You can't put it on the internet if it isn't true!

http://wasteoilheaterforum.com/index.php?topic=102.0