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  1. #1
    Join Date
    Sep 2011
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    50

    Weekend challenge - fun time

    Here is the scenario.... you have to make this boiler modulate and purge (to at least 100 degrees or less)for under $.

    The boiler pictured has a cold start control from the factory. GO!

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    You can use anything you want and modify anything you want as long as you stay at or below $. wholesale in parts.

    (if this isnt allowed please delete)
    Last edited by beenthere; 12-24-2012 at 05:48 AM. Reason: price

  2. #2
    Join Date
    Dec 2002
    Location
    SouthEast NC ICW & Piedmont Foothills
    Posts
    7,635
    are you asking what is needed to accomplish your task?

    if so; you may be pushing the envelope of this open forum.
    It`s better to be silent and thought the fool; than speak and remove all doubt.

  3. #3
    Join Date
    Sep 2011
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    50
    Quote Originally Posted by dandyme View Post
    are you asking what is needed to accomplish your task?

    if so; you may be pushing the envelope of this open forum.
    Yes I am ...not my task... the task
    And ... Am I?
    (obviously not talking modulating fire rate)

  4. #4
    Join Date
    Sep 2011
    Posts
    50
    49 views and still nothing?. I assume that you are checking it twice and seeing what is naughty or nice?.

  5. #5
    Join Date
    Apr 2003
    Location
    Maple Grove, MN
    Posts
    1,270
    Call somebody else

    Seriously though, what do you mean by modulate and purge? Are you talking about a primary/secondary setup where the primary maintains a steady temperature while the secondary modulates somehow? Does purge mean an auto air vent? Is labor and piping materials included in your price? Does everything have to be automatic, or can we have some guy stand there operating manual "modulate" and "purge" valves?

  6. #6
    Join Date
    Oct 2011
    Location
    Chicagoland Area
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    4,564
    Quote Originally Posted by ammoniadog View Post
    can we have some guy stand there operating manual "modulate" and "purge" valves?
    I'm up for the task
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

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  7. #7
    Join Date
    Nov 2001
    Location
    Seattle, WA
    Posts
    7,756
    Place someone next to the boiler with his/her hand on the on/off switch and a thermometer & turn it on. When the thing, whatever your are measuring) reaches 110 degrees have that person turn off the on/off switch.
    "The American Republic will endure until the day Congress discovers it can bribe the public with the public's own money.
    - Alexis de Toqueville, 1835

  8. #8
    Join Date
    Sep 2011
    Posts
    50
    Quote Originally Posted by ammoniadog View Post
    Does everything have to be automatic, or can we have some guy stand there operating manual "modulate" and "purge" valves?
    LOL!~I scared the cat half to death with the snarf I made when I read this Beer all over the floor...which I have to clean up now


    Seriously though, what do you mean by modulate and purge? Are you talking about a primary/secondary setup where the primary maintains a steady temperature while the secondary modulates somehow? Does purge mean an auto air vent? Is labor and piping materials included in your price?
    Modulate the out going water at a set temp (lets say whatever you like between 140 and 180) and then purging the remaining water out of the boiler after the call is satisfied.
    Reason for doing this is to bring the boiler to temp fast without chilling the element or causing the boiler to shock and then getting all the water top side after the stat is satisfied, rather than losing it to standby.
    Material only

  9. #9
    Join Date
    Sep 2011
    Posts
    50
    The rest of you are just as funny... HAHAHA

  10. #10
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,876
    Weil McLain BCP 3. Its simple fast and easy.

    It will run the circ anytime the outdoor temp is below the heating point, and regulate boiler temp based on outdoor temp.

    Won't bring the water temp up fast, as what purging the boiler is counter productive to doing that.
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  11. #11
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,588
    I'm thinking of various ways but I'm not getting the question completely. A Teckmar could keep a set temp plus with ODR modulate the temp. A bypass would let the boiler heat fast also.

  12. #12
    Join Date
    Dec 2012
    Location
    Columbus OH
    Posts
    32
    Ok 60sec go , you need three stats , a bypass ,holding take and a solenoid. When a boiler is turned off some heat remains in the mass of the boiler. If the flow through the boiler is stopped at the same time the boiler is shut off, the residual heat is lost. Therefore, after operation of the boiler the residual heat in the boiler should be purged to the system in order to decrease standby losses. This is accomplished by turning the boiler off but keeping the system pump on for a period of time. This function increases system efficiency by minimizing standby losses.To ensure that the DHW tank is up to temperature after the DHW Setback period the control must raise the tank temperature before the setback period ends. This can be accomplished automatically by using a control that has an optimum start / stop function. This function increases comfort by ensuring the DHW tank is up to temperature at the beginning of the occupied period.DHW priority allows the DHW tank to recover faster by temporarily suspending the heat supply to the heating system. All of the available heat is provided to the DHW tank for a period of time. This function provides more comfort by ensuring faster DHW pick up times and increases system efficiency by often allowing the use of a smaller heat source. OK what did I win....???? lol

  13. #13
    Join Date
    Sep 2011
    Posts
    50
    Lets hear more about these three stats.



    Quote Originally Posted by techwizard007 View Post
    Ok 60sec go , you need three stats , a bypass ,holding take and a solenoid. When a boiler is turned off some heat remains in the mass of the boiler. If the flow through the boiler is stopped at the same time the boiler is shut off, the residual heat is lost. Therefore, after operation of the boiler the residual heat in the boiler should be purged to the system in order to decrease standby losses. This is accomplished by turning the boiler off but keeping the system pump on for a period of time. This function increases system efficiency by minimizing standby losses.
    You win for the explanation of the purge cycle but what if you don't have a DHW tank?. Remember.... no waste (by design) and $. limit on parts.
    Last edited by beenthere; 12-24-2012 at 02:01 PM. Reason: price

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