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Re: Vitodens 100w-b1ka
Set point adjusted to 70. 700 sq feet. 9.5 ceiling. Temp runs at 180F. Could possibly be air. Has taco 4900 air scoop. Have bled BB. Boiler BTU should be well sufficient. Listening to system pump sounds like there may be air. Air scoop screw is open. pressure #13. Air scoop possibly stuck. Not sure.
Re: Vitodens 100w-b1ka
I agree with everything your saying about the curve. Looking at adding more ft of BB in summer. Just wondering if the internal pump should be set slower. Has primary secondary with close tees. -28 C here right now. Has trouble getting indoor temp to 21 C.
Re: Vitodens 100w-b1ka
A well designed system using fin tube should use a 2.0 curve. The curve adjustment will raise or lower the heating output of the baseboard. If a curve of 2.4 is required, the footage of baseboard installed may have been originally sized for a 180 degree water temperature, instead of 140. When designed for 140, the boiler will be in condensing mode most of the time. It's not uncommon to have to raise the heating curve when extremely cold weather prevails.
Re: Vitodens 100w-b1ka
What kind of heating do you have? Radiant? Radiators? Hydroair?
Do you have an outdoor sensor mounted on the north side of the cabin?
You may need to adjust your heating curve. I wouldn’t play around with the pump speed just yet.
Do you have an outdoor sensor mounted on the north side of the cabin?
You may need to adjust your heating curve. I wouldn’t play around with the pump speed just yet.
Re: Header, because
Those Slant Fins make very dry steam, I suspect due to the unique internal path of steam in the boiler through the full depth of the really wide end section and the internal baffling. Also really easy to get a good skim. Probably the best Cast Iron boiler design on the market.Unfortunately, they're no longer on the market. R.I.P., Slant/Fin.
Re: Taco vt2218 electronic issues
I just wonder the advantage to the delta T mode? It’s basically a Heat delivery limiting function, it constrains the system to a fixed output.
If your thermostat is set to 71 and the room only reached 68-69, seems it doesn’t cover the load.
Shouldn’t you be able to set the stat at 69 and it controls within a degree of that, depending on how your thermostat differential is set.
I would think a delta p ECM would have the same, maybe less power consumption. It only consumes what any open zones require, for flow and energy needed to obtain the proper gpm.
Some advantage to delta T if the boiler is oversized, as it limits flow rate. Are you running outdoor reset?
If your thermostat is set to 71 and the room only reached 68-69, seems it doesn’t cover the load.
Shouldn’t you be able to set the stat at 69 and it controls within a degree of that, depending on how your thermostat differential is set.
I would think a delta p ECM would have the same, maybe less power consumption. It only consumes what any open zones require, for flow and energy needed to obtain the proper gpm.
Some advantage to delta T if the boiler is oversized, as it limits flow rate. Are you running outdoor reset?
hot_rod
1
Re: Taco vt2218 electronic issues
Hi @Franktg78 . I just installed a second one because the first one was doing this same thing. So is the second. Just found this post when trying to search for any information. Glad I did, and glad Taco is aware of the issue. Thought I was losing my damn mind.Any idea on how much energy it saved you? Compared to what other circulator type?
I'm replacing an older VT2218 (5-6 years) that burned out for some reason. The Delta-T is a great, energy saving feature.
Enough $$ to cover the cost of a new one?
hot_rod
1
Re: Taco vt2218 electronic issues
Just got a vt2218 installed yesterday, and it has exactly this issue (date code 2/23). Shows low watts and 0 GPM even when running at full speed, and it never adjusts speed. I've reached out to the Amazon 3rd party vendor that sold it to me, but has anyone heard from Taco about how this is to be resolved?
Seems like they ought to be having a recall and replacement from the manufacturer for these defective units, especially if there are so many of them that don't function at all.
Seems like they ought to be having a recall and replacement from the manufacturer for these defective units, especially if there are so many of them that don't function at all.
diftil
1
Re: Taco vt2218 electronic issues
Do you really need the delta T function? Get a 007e or other model that meets the load.
hot_rod
1
Taco vt2218 electronic issues
Ive recently purchased a new vt2218 from supplyhouse.com
Out of the box the electronics were faulty. Set it for delta t supply initiall showed 97 supply 80 return delta set to 10 deg. Display showed 07 watts and 00 gpm but it was running full speed. Plugged it into a watt meter and sure enough watts were at 59. Eventually supply and return temps came within 5 degrees of each other. Supply was 98 return was 93. Watts still showed 07 gpm 00 and plug in watt meter read 59 watts. Called taco went through it with them they advised me to return it. Called sh.com went over it with them they issued me a return authorization. Thinking this was a fluke i ordered another vt2218 for another job. My replacement and additional new pump arrive. I swap out the bad one same issue with new one. I swap out that one and same issue with third pump. I now have three brand new vt2218 pumps all with faulty electronics from day one. I called taco and got the feeling they know something is wrong. Tech support told me ask the supplier for a pump out of a different lot. I asked what he meant by that and he said just make sure you get the replacements from a different lot and you should be ok.
This doesnt help all my wasted travel time, on site time not to mention the issues still isnt resolved.
Any one else running into this?
Thanks
Frankie
BTU Inc
Out of the box the electronics were faulty. Set it for delta t supply initiall showed 97 supply 80 return delta set to 10 deg. Display showed 07 watts and 00 gpm but it was running full speed. Plugged it into a watt meter and sure enough watts were at 59. Eventually supply and return temps came within 5 degrees of each other. Supply was 98 return was 93. Watts still showed 07 gpm 00 and plug in watt meter read 59 watts. Called taco went through it with them they advised me to return it. Called sh.com went over it with them they issued me a return authorization. Thinking this was a fluke i ordered another vt2218 for another job. My replacement and additional new pump arrive. I swap out the bad one same issue with new one. I swap out that one and same issue with third pump. I now have three brand new vt2218 pumps all with faulty electronics from day one. I called taco and got the feeling they know something is wrong. Tech support told me ask the supplier for a pump out of a different lot. I asked what he meant by that and he said just make sure you get the replacements from a different lot and you should be ok.
This doesnt help all my wasted travel time, on site time not to mention the issues still isnt resolved.
Any one else running into this?
Thanks
Frankie
BTU Inc
