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Type: Posts; User: mark115

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  1. Replies
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    Re: Call for Service

    Had a service guy in on Friday to do pre-season service. He purged the system by running the circulator, then fired-up the boiler and waited for heat at each of the radiators.

    He was ready to...
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    L1 and C1: Is that on the ZVC or the Aquastat? ...

    L1 and C1: Is that on the ZVC or the Aquastat?

    The system heats the house. Cirulation does not seem to be a problem. If anything, gpm is too high when only 1 zone calls.

    You're all correct....
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    I'd like to bleed the lines before the heating...

    I'd like to bleed the lines before the heating season begins. Is there someway to run the circulator without firing the boiler?

    System includes:

    TACO ZVC 406 6-zone-valve controller.
    TACO 008...
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    Someone once said, "It's not over, 'til it's...

    Someone once said, "It's not over, 'til it's over."

    After weeks of disagreeing on the "right" size boiler for my house, my contractor wants to do a heat-loss survey. I have my own results from 3...
  5. Thread: Too much flow?

    by mark115
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    008 it is.

    008 it is.
  6. Thread: Too much flow?

    by mark115
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    OK... just to be sure... now that I'm using the...

    OK...
    just to be sure...
    now that I'm using the charts correctly...

    If I stick with 1 circ, here are the gpm generated by a TACO 0011 on each zone:

    Zone1: 10.8 FTHD, 22gpm
    Zone2: 9.0, 23 ...
  7. Thread: Too much flow?

    by mark115
    Replies
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    1,172

    The 008! I can't tell you how many times I looked...

    The 008! I can't tell you how many times I looked at that chart, but the 008 didn't jump out at me.

    It sounds like the 1 circ/zone is the "best" solution. I think I'll go that route.

    Thanks for...
  8. Thread: Too much flow?

    by mark115
    Replies
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    1,172

    beenthere: Original problem was the BANGing...

    beenthere: Original problem was the BANGing boiler. You may have seen that the mfr has agreed to replace it. During all of that, we discussed the possibility of low flow being the culprit. Don't know...
  9. Thread: Too much flow?

    by mark115
    Replies
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    1,172

    My system has 1 circulator (TACO 007-F5) on the...

    My system has 1 circulator (TACO 007-F5) on the return, pushing into the boiler.

    If FT.HD. = loop length * 0.06 and GPM=HPx2178/FTHD, here are GPM in each of my loops using TACO 007-F5, 1/25hp,...
  10. Thread: what is

    by mark115
    Replies
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    4,304

    fat eddy: Yes ...and no. The manufacturer has...

    fat eddy: Yes ...and no.
    The manufacturer has decided that the BANGing is a problem with the boiler and has agreed to replace it. At that point, I asked the installer to double-check if 187MBTUH...
  11. Thread: what is

    by mark115
    Replies
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    4,304

    Using the formulas that Irascible provided in his...

    Using the formulas that Irascible provided in his link, here are the FTHD and gpm for my zones:

    Zone1: 10.8 FTHD, 8.1 gpm
    Zone2: 9.0, 9.7
    Zone3: 6.6, 13.2
    Zone4: 7.2, 12.1
    Zone5: 6.0, 14.2
    ...
  12. Thread: what is

    by mark115
    Replies
    28
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    4,304

    Should I start a new thread? The Buderus...

    Should I start a new thread?

    The Buderus installation manuals are available on line. There is a Pressure drop diagram, but it is not referenced in the dialogue. For G234, 17.6 GPM seems to be...
  13. Thread: what is

    by mark115
    Replies
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    Hoffa: thanks for the explanation and the tip....

    Hoffa: thanks for the explanation and the tip.
    Irascible: thanks for the link.

    I guess my biggest fault is that I'm an engineer, but I don't work in HVAC. As with anything (i.e., stereo,...
  14. Thread: what is

    by mark115
    Replies
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    4,304

    What is

    NormChris: I'm a homeowner. The graph on the TACO data sheet says "Head-Feet". So, your saying that "Head-Feet" is just a shorter way of saying "Feet of Head". OK. What does that mean? I have at...
  15. Thread: what is

    by mark115
    Replies
    28
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    4,304

    I need the definition of "Head Feet". I think...

    I need the definition of "Head Feet".

    I think the circulator on my system may be too small. Looking at the TACO 0xx-F5 data sheet, the graph show GPM vs. Head Feet. I think I understand the graph....
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    I've decided on a boiler: 103 MBTUH input. And, I...

    I've decided on a boiler: 103 MBTUH input. And, I like the idea of an outdoor reset. Let's just leave that alone for a little while. Of course, if there are any major objections, please reply.
    ...
  17. Replies
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    I thought 60K was low, too, but that wasn't the...

    I thought 60K was low, too, but that wasn't the first pass. I had to scale-back on some of my facts. I believe that I made very few assumptions. For example:

    house was built in 1955.
    I know...
  18. Replies
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    1,763

    I have a stand alone gas-fired hot water heater....

    I have a stand alone gas-fired hot water heater. My gas bills in the summer almost go to zero. I have no plans to use an indirect fired hot water heater.
  19. Replies
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    Thank you for your replies. Lots of good...

    Thank you for your replies. Lots of good information. I’d like to nail-down some of the general info first, and then move to the details. I think I have questions on every response, so please bear...
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    Heatair: only 1 circ pushing into the boiler,...

    Heatair:

    only 1 circ pushing into the boiler, TACO 007-F5, 1/25hp, 3250rpm, pushing into the boiler. . (I understand that this may be small.)

    House stays warm on coldest days. One room in...
  21. Replies
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    Beenthere: I live near Philadelphia. ...

    Beenthere: I live near Philadelphia.

    Simpleman: are you suggesting that I pay to have the bb reduced in some of the rooms/zones? I have considered clipping a foot or so of fins in the room that...
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    (some of you will recognize me from a recent...

    (some of you will recognize me from a recent post, but now that we're starting over, let's start from the beginning.) I'm planning to install a new boiler, and I'm getting conflicting information on...
  23. hydronicsman: Thank you for your reply. I...

    hydronicsman: Thank you for your reply. I actually replied to this thread before reading through all the posts. Now I understand that a hot water/bb system doesn't really add humidity (maybe a little...
  24. I live in SE PA also, with hot water heat. I have...

    I live in SE PA also, with hot water heat. I have about 150' of bb in a 2400 sqft house. It's the dryest house I have ever lived in. And, "Yes", I get nose bleeds. (No one else in the family does,...
  25. Replies
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    The installer spent 2 more hours with my boiler...

    The installer spent 2 more hours with my boiler on Friday, and had the mfr on the phone, too. Unfortunately, they were unable to determine the cause of the BANGing.

    While this has been a long...
  26. Replies
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    The contractor is scheduled to review the system...

    The contractor is scheduled to review the system again on Friday, Mar. 4. And, he's bringing "help". (I hope it stays cold, otherwise they won't get a full appreciation for the BANGing.) With all of...
  27. Replies
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    Natural gas.

    Natural gas.
  28. Replies
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    "HX"? do you mean the expansion tank?

    "HX"?
    do you mean the expansion tank?
  29. Replies
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    Again, thank you everyone for your comments. ...

    Again, thank you everyone for your comments.

    jrc2905, there is only 1 circulator, TACO 007-F5, 1/25hp, 3250rpm, pushing into the boiler. Flow thru the boiler should be a constant, right? Circ is...
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    I live near Philadelphia.

    I live near Philadelphia.
  31. Replies
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    Fat eddy: I will ask the installer to check gas...

    Fat eddy: I will ask the installer to check gas pressure and burner alignment. Could this also cause the BANG on cool-down? The BANG that occurs 60sec after the burners ignite sounds very similar to...
  32. Replies
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    I've used 2 heat loss software programs. One from...

    I've used 2 heat loss software programs. One from Slantfin and one that I found on line. On first pass both programs calculated that I'm losing only 40MBTUH. Rules of thumb suggest that the house...
  33. Replies
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    Again, thank you everyone for your comments. ...

    Again, thank you everyone for your comments.

    beenthere: Circulator is TACO 007-F5. 1/25hp. 3250rpm.

    Sweet: can't find recommended GPM thru boiler. The manual shows a graph of 1.45 psi drop at...
  34. Replies
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    The installer was measuring supply/return temps...

    The installer was measuring supply/return temps on Tuesday. I didn't get a copy of his numbers though. I suspect that the difference is > 20F. For example, when a zone calls, temperature in the...
  35. Replies
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    Interesting... It's rare that more than one...

    Interesting...
    It's rare that more than one zone calls at once. Mostly it's the first floor (living room, dining room, kitchen, front and back hallways leading to doors, double French doors in the...
  36. Replies
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    Expansion tank is model HTX30.

    Expansion tank is model HTX30.
  37. Replies
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    Boiler temp ranges between 130 and 190 (when...

    Boiler temp ranges between 130 and 190 (when hi-temp shut-off is set at 190). Pressure ranges between 18-22 psi. I understand that's a little high.

    If the boiler was actually "Stacking heat",...
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    Thank you, everyone for your input. The...

    Thank you, everyone for your input.

    The contractor installed a bypass loop as his first effort to silence the boiler. It hasn't helped. Since I also get the BANG when the boiler is idle (burners...
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    Make/Model = Buderus G234x-45. The noise is...

    Make/Model = Buderus G234x-45.

    The noise is not coming from the zone valves. It occurs about 1 minute after the burners ignite, you know shortly into the cycle. Valves and LEDs on the control...
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    House is 2300 sqft. Boiler is 187,000 BTU input....

    House is 2300 sqft. Boiler is 187,000 BTU input.

    BANG occurs on any combination of zones. It might help to know that there is only 1 circulator, pushing into the boiler. Flow thru the boiler...
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    Replaced my 50 year-old gas-fired boiler at the...

    Replaced my 50 year-old gas-fired boiler at the beginning of the season, as part of a 500 sqft addition (2 rooms, 2 new zones).

    It heats the house just fine. Temperatures in 4 zones hold true to...
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