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General Outdoor Furnace Discussion / Plate exchanger plugged up, any ideas how to clean it out??
« on: March 01, 2015, 09:31:02 AM »
Hi all,
About 3 years ago I purchased a slightly used 10 plate HX to use for my domestic water. Recently my water pressure through the HX has dropped off terribly. I just confirmed it by disconnecting it from my domestic supply lines and hooked a garden hose direct to it. I only got a trickle of water out of it. It is set up so it preheats the water as it goes into the water heater tank and has been a great setup until now. Does anybody have any ideas about how to clean out/flush out the inside of a HX??? I am going to try letting it soak with white vinegar. I'll let you know if that works. Any other ideas would be helpful and appreciated.
Thanks!!
About 3 years ago I purchased a slightly used 10 plate HX to use for my domestic water. Recently my water pressure through the HX has dropped off terribly. I just confirmed it by disconnecting it from my domestic supply lines and hooked a garden hose direct to it. I only got a trickle of water out of it. It is set up so it preheats the water as it goes into the water heater tank and has been a great setup until now. Does anybody have any ideas about how to clean out/flush out the inside of a HX??? I am going to try letting it soak with white vinegar. I'll let you know if that works. Any other ideas would be helpful and appreciated.
Thanks!!
2
Central Boiler / E2300 New Primary Air Channel
« on: November 12, 2014, 07:38:12 PM »
Hello all,
Over the past several years I've spent a quite a lot of time on this site. Many of you have probably seen some of my posts and pics. It's been quite a learning experience over the years. I've spent way too much time scratching my head and getting frustrated. I have recently replaced the primary air channel in my E2300 again. I refined and simplified the design quite a lot and so far it seems to be working well. One necessary additional accessory is to add the spacer bar kit on the sidewalls. Or, make your own. I think a U-shaped piece of rebar would work well leaning against the walls and is much cheaper without having to weld tabs onto the sidewalls. Also easily replaceable and removable for cleaning. The main reason for adding this is to help keep wood from sitting on the pipes. I'm attaching a full parts list to fit my furnace. Note that I have had my sidewalls relined with 1/4" plate so my firebox is slightly narrower. Not enough to make a difference I don't think but you may need to increase the width of the channel by 1/2 or so on each side to keep the pipe as close to the sidewall as possible. I drilled 5 holes in each side. 30" pipe. Drilled a 1/2" whole in 2" from each end and spaced the remaining 3 holes 6 1/2" apart.
I'm happy to try to answer any questions. Hope this info helps somebody.
I guess I'll have to try to post the pictures tomorrow. Keeps telling me the upload folder is full. Hope this goes through.
Over the past several years I've spent a quite a lot of time on this site. Many of you have probably seen some of my posts and pics. It's been quite a learning experience over the years. I've spent way too much time scratching my head and getting frustrated. I have recently replaced the primary air channel in my E2300 again. I refined and simplified the design quite a lot and so far it seems to be working well. One necessary additional accessory is to add the spacer bar kit on the sidewalls. Or, make your own. I think a U-shaped piece of rebar would work well leaning against the walls and is much cheaper without having to weld tabs onto the sidewalls. Also easily replaceable and removable for cleaning. The main reason for adding this is to help keep wood from sitting on the pipes. I'm attaching a full parts list to fit my furnace. Note that I have had my sidewalls relined with 1/4" plate so my firebox is slightly narrower. Not enough to make a difference I don't think but you may need to increase the width of the channel by 1/2 or so on each side to keep the pipe as close to the sidewall as possible. I drilled 5 holes in each side. 30" pipe. Drilled a 1/2" whole in 2" from each end and spaced the remaining 3 holes 6 1/2" apart.
I'm happy to try to answer any questions. Hope this info helps somebody.
I guess I'll have to try to post the pictures tomorrow. Keeps telling me the upload folder is full. Hope this goes through.
3
For Sale / Water to air heat exchanger needed.
« on: January 21, 2014, 07:28:10 PM »
I was wondering if any of you have or know a reasonable place to purchase water to air heat exchangers. Specifically 140k btu. I would need 4 or 5.
Thanks
Jeff
Thanks
Jeff
4
General Outdoor Furnace Discussion / Plate exchanger prices???
« on: February 24, 2013, 10:05:29 PM »
I think I'm looking at adding a 30 or maybe even a 50 plate exchanger to my system. Long story short, if possible, I have 2 OWBs plumbed together. The problem I have is that I have a hard time keeping the water level between the two equalized. One boiler or the other may and sometimes do overflow. I have a constant balancing act to keep them within reasonable levels. Both have 0014 Taco pumps. Last year I had them both pushing water direct to my main manifold (two hot supplies, and two returns, one of each to each boiler). Worked ok that way. This year, I still have that option, but I changed the piping a little so that I can run the boilers in a series. Hot water comes from boiler A to manifold, Cold returns to boiler B. Hot from boiler B goes into cold return of Boiler A to complete the circle. I've even gone so far as to connect a hose to the drains of each boiler to act as an equalizer line, which does help, but not enough.
The 2 boilers have been holding pretty well equalized for the last couple of days, but today my family and I wanted to spend the afternoon at my parents. At this time I only have one boiler burning, the CB E2300. For some reason, and this is somewhat common, the boiler did not start gassifying for a cycle and it began losing water temp. Fortunately I have a camera aimed at the guage so I can monitor it via the internet. I knew there was a problem. I drove home, thought I got things going good and went back to my parents. I monitored and found that it began losing temp again. We stayed for dinner, knowing that the oil burner would kick in and keep my plants alive (1 greenhouse running so far). Upon arriving home, water temp down to 152, I noticed that the ground was very wet. I also heard some air bubbles moving through my manifolds. The water sight guage on the CB was at a good level, but apparently a lot of water from the other boiler had overflowed the CB.
I'm open to suggestions. There are a lot of smart guys out here. But I'm thinking a plate exchanger between the two boilers is my best option. Anybody know where I can get a reasonable price on a bigger plate exchanger?? I was thinking the bigger the better so my thought is on a 50?? CB boiler is rated at 170K btu. Wood Doctor is rated at 280K btu. I want as much heat transfer as possible.
Thanks for any input in advance.
Jeff
The 2 boilers have been holding pretty well equalized for the last couple of days, but today my family and I wanted to spend the afternoon at my parents. At this time I only have one boiler burning, the CB E2300. For some reason, and this is somewhat common, the boiler did not start gassifying for a cycle and it began losing water temp. Fortunately I have a camera aimed at the guage so I can monitor it via the internet. I knew there was a problem. I drove home, thought I got things going good and went back to my parents. I monitored and found that it began losing temp again. We stayed for dinner, knowing that the oil burner would kick in and keep my plants alive (1 greenhouse running so far). Upon arriving home, water temp down to 152, I noticed that the ground was very wet. I also heard some air bubbles moving through my manifolds. The water sight guage on the CB was at a good level, but apparently a lot of water from the other boiler had overflowed the CB.
I'm open to suggestions. There are a lot of smart guys out here. But I'm thinking a plate exchanger between the two boilers is my best option. Anybody know where I can get a reasonable price on a bigger plate exchanger?? I was thinking the bigger the better so my thought is on a 50?? CB boiler is rated at 170K btu. Wood Doctor is rated at 280K btu. I want as much heat transfer as possible.
Thanks for any input in advance.
Jeff
5
Central Boiler / CB E-2300 New Primary Air Channel
« on: January 20, 2013, 10:08:19 PM »
About a month ago I put this air channel together made from black pipe. Until last Feb. I fought with the original air channels plugging up with creosote and ash with no good way to clean them out. Last Feb, I had a welder here and we came up with a channel that brought the air up to the top of the firebox (sort of copying the P&M Opt. 250 as well as my Wood Doctor HE10000 designs). It got me through the season and I'll hang on to it for emergencies if I ever need it again. The problem with that design is that it didn't give me even flow of air over the fire. My hottest fire was around the nozzle but did not spread out accross to the sides or front and back. This caused a substantial amount of bridging.
So here is my new design. Took me a little time figuring out sizing of pipes but I got it right on the first try and it has been working very well. Most importantly, IT IS EASILY REMOVABLE FOR CLEANING.
Total cost for this fix was about $135 and about 1 hour to put it together. No welder needed. Last year I had the welder cut out the back portion of the original air channel to allow access to the air inlet hole. If there is ever a warranty (yeah right) issue, I can have it welded back in pretty easily.
[attachment deleted by admin]
So here is my new design. Took me a little time figuring out sizing of pipes but I got it right on the first try and it has been working very well. Most importantly, IT IS EASILY REMOVABLE FOR CLEANING.
Total cost for this fix was about $135 and about 1 hour to put it together. No welder needed. Last year I had the welder cut out the back portion of the original air channel to allow access to the air inlet hole. If there is ever a warranty (yeah right) issue, I can have it welded back in pretty easily.
[attachment deleted by admin]
6
Central Boiler / Maxim Pellet Furnace
« on: December 17, 2012, 08:08:58 PM »
Anybody out here have knowledge on or experience with the CB Maxim Pellet Furnace?? Looking for known problems, pros and cons.
Thanks in advance!!
Thanks in advance!!
7
For Sale / Finned Tubes or heat elements (baseboard type) for sale
« on: December 13, 2012, 07:48:24 PM »
Anybody from Maine on here that might be interested in these heat elements? I have 21 left for sale, $25ea. All ends have been cleaned out well and test fitted to assure easy re-assembly. Very little use on them. I attempted to heat my greenhouses with them but found I would have needed twice as many and it wasn't cost effective to continue on that path. So I changed over to water to air HX's with blowers and no longer need these.
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