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Low water cut off

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Comments

  • eltin
    eltin Member Posts: 43
    Ok, I got it
  • eltin
    eltin Member Posts: 43
    photo 2016-11-09 22.08.23_zpsulcseqq4.jpg

    Anyone knows if this Pennco boiler has a tap behind the jacket in the event that I wanted to install a probe type LWCO. Or if one can be installed on this particular boiler.
  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,846
    edited November 2016
    Here's your IOM.
    http://www.ecrdocuments.com/secure/upload/document/4042.pdf
    That should have pictures of the castings with the locations of all the tappings and anything else you might need to know in the future.

    Bear in mind that this may be for a newer revision that the one you own, and tappings sometimes change, so if you can locate your original OEM, that's your best source of truth on your boiler.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24
  • eltin
    eltin Member Posts: 43
    Yes , I've came across this pdf, and noticed that there is not a cut out on the jacket for the LWCO pictured. I'm a bit confused, because there is a plug above the sight glass. This is why I was wondering if there may be another tap on the body itself
  • eltin
    eltin Member Posts: 43
    If I elect to replace with the same 67, I have noticed there is a millivolt option. Which model of the 67 should I be looking at I'm a bit confused?
  • Steam
    Steam Member Posts: 45
    Please seal around the flue pipe where it goes into the chimney. I would recommend real castable refractory over the garbage that comes in the bucket.
  • eltin
    eltin Member Posts: 43
    Could you provide a link for it. I do have that bucket stuff though
  • Fred
    Fred Member Posts: 8,542
    eltin said:

    If I elect to replace with the same 67, I have noticed there is a millivolt option. Which model of the 67 should I be looking at I'm a bit confused?

    The model # on your unit will simply say #67 for the standard LWCO and #67G for the unit with millivolt switches.




  • eltin
    eltin Member Posts: 43
    Ok the reason I asked is because the feed is 24 volt. Could I swap to the millivolt switch on another 67 for a consistent wiring, or it does not matter ?
  • Fred
    Fred Member Posts: 8,542
    No you don't want the Millivolt model. You want the standard #67, Part #149400
    http://www.supplyhouse.com/Mcdonnell-Miller-149400-67-Float-Type-Low-Water-Cut-off-Steam
  • eltin
    eltin Member Posts: 43
    Ok thanks
  • eltin
    eltin Member Posts: 43
    I've noticed that water is being lost. I filled the boiler to the water line, and let in run a few times. Condensate does come back but not to the level I've set it at. I do not see any leaks from the main or return. The presuretrol was set at 0.5 and 1 where as the boiler does cut off at about 1.5 psi. I'm suspecting that it could be a vent that was tapped in on a verticle 1-1/4 line in the attic. It whistles very hard. If I were to change it which vent would I use
  • Fred
    Fred Member Posts: 8,542
    How much water are you losing? Over how long a period? Do you see any steam coming out of the chimney when the boiler is in a heating cycle? Is that vertical pipe just a radiator run-out, feeding one radiator? When you say it whistles, does it do that during the entire heating cycle? Can you see it to see if steam is coming out of it?
  • eltin
    eltin Member Posts: 43
    I'd say from the water line to the minimum, where the LWCO will call for water. I bypassed the thermostat to determine if it was working and to determine if the pressuretrol is cutting off where its suposed to. I would leave the boiler on for about an hour of continous running before it reaches a little less then 1.5 psi and cuts off. There is no steam from the chimney when the boiler is on. The vertical pipe just runs up in a corner to the ceiling. I will assume its capped, because there are no other radiators above it. It whistles like it blowing out air, but I have not seen steam coming from it
  • Fred
    Fred Member Posts: 8,542
    If you can, post a picture of that vent in the attic. I'm not sure what purpose it serves if no rads are connected to that vertical. Also, verify if you have a one pipe or two pipe steam system.
  • eltin
    eltin Member Posts: 43

  • eltin
    eltin Member Posts: 43
    edited November 2016
    This looks like a 2" pipe the same as the main. From the basement I can trace the origin thats routed through the walls. However, its a 1-1/4" I really don't understand why its smaller then transitions to a larger diameter. Also thats the vent which lets of a huge amount of noise. Do I put a bigger vent on it ?
  • KC_Jones
    KC_Jones Member Posts: 5,843
    When steam hits a vent it is supposed to close, if you have any vents that don't do this you are losing steam. "I have not seen steam coming from it" That's quite possible as steam is invisible.
    2014 Weil Mclain EG-40
    EcoSteam ES-20 Advanced Boiler Control
    Boiler pictures updated 2/21/15
  • eltin
    eltin Member Posts: 43
    ok, is this the appropriate set up ? and why was this done this way with a larger pipe ?
  • KC_Jones
    KC_Jones Member Posts: 5,843
    Sometimes they would install a vertical pipe like that to act as a radiator, that would explain the increase in pipe size. This is just a best guess though.
    2014 Weil Mclain EG-40
    EcoSteam ES-20 Advanced Boiler Control
    Boiler pictures updated 2/21/15
  • eltin
    eltin Member Posts: 43
    Should this vent be changed seeming is it is the furthest from the boiler and blowing ? And if so, which valve ?
  • Fred
    Fred Member Posts: 8,542
    You can replace that vent with a Maid-o-mist vari-vent or a Gorton #4 or #5 or a Hoffman 1A adjustable vent.
  • eltin
    eltin Member Posts: 43
    I'm curious, why not a Gorton 6 ?
  • BobC
    BobC Member Posts: 5,505
    Make it easy on yourself and buy a maid o mist 5L, one vent and five orifices - stop guessing what size vent you might need.

    https://www.amazon.com/OMIST-0220-5L-Angle-Steam-Valve/dp/B003DV3AGE/ref=sr_1_1?ie=UTF8&qid=1479947428&sr=8-1&keywords=maid+o+mist+5l

    Bob
    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
    Hatterasguy
  • Fred
    Fred Member Posts: 8,542
    I agree with @BobC , put an adjustable on there and play with it to your heart's desire. as you said, that pipe has no radiators on it so I have to assume it is the heat source for that attic area. There really isn't any need to vent it super fast.
  • eltin
    eltin Member Posts: 43
    Ok
  • hboogz
    hboogz Member Posts: 113
    This type of riser that acts as a radiator is popular in my area of queens. Any idea how to calculate EDR for this or how to account for this when replacing the boiler?

    These are common in bathrooms by me.
    RomanGK_26986764589
  • Fred
    Fred Member Posts: 8,542
    There is a chart that shows the sq. ft. of EDR per linear ft. of pipe, based on pipe diameter. I can't put my hands on it right now but I think it has been posted on here before. You might want to search it.
  • Jamie Hall
    Jamie Hall Member Posts: 24,980
    No chart needed -- measure the outside diameter. Multiply by pi -- 3.14. Divide by 12. That's the EDR per foot.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • hboogz
    hboogz Member Posts: 113
    @Fred thanks for the reply. I'll search for it. In my case the pipes are usually capped in the crawl space above the ceiling and a vent is located towards the top of the finished ceiling.
  • Fred
    Fred Member Posts: 8,542
    hboogz said:

    @Fred thanks for the reply. I'll search for it. In my case the pipes are usually capped in the crawl space above the ceiling and a vent is located towards the top of the finished ceiling.

    @hboogz , see @Jamie Hall 's comment above. It includes the calculation. Thanks Jamie
  • hboogz
    hboogz Member Posts: 113
    edited November 2016
    Awesome. Thanks @Jamie Hall & @Fred

    Harry.
  • eltin
    eltin Member Posts: 43
    The MM 67 is dripping from the drain hole. In 2 days It fills a 5 gal bucket. Can this be fixed or do the unit need to be replaced ?
  • Abracadabra
    Abracadabra Member Posts: 1,948
    Replace the valve?

    http://www.supplyhouse.com/Mcdonnell-Miller-310447-14-B-Blow-Down-Valve-Ball-Type-for-472476770B-Water-Feeders
  • eltin
    eltin Member Posts: 43
    Ok, thanks. Could this also be the source for the loss of water in the system
    New England SteamWorks
  • Fred
    Fred Member Posts: 8,542
    eltin said:

    Ok, thanks. Could this also be the source for the loss of water in the system

    It is the source of that 5 gallons of water every two days. That water is right out of the steam system/boiler.
  • eltin
    eltin Member Posts: 43
    imagephoto 2016-11-09 22.08.23_zpsulcseqq4.jpg" alt="" />

    I'm not sure if this is the right thread, but with this boiler can baseboards be added to the basement ? Or should I look into another way of heating the basement ?

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