Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

mc lean 78 replacement

clammy
clammy Member Posts: 3,094
This old boiler suffered oxygen corrosion from taking on too much water with buried returns that looked like swiss chesewhen i arravied it was too late the boiler lwco was jammed and the manual reset lwco probe was coated with mud the inside of the old boiler looked like it was 20 years old instead of 5 .i redid the header in steel the last was in copper we also replcaced the buried return and some return drips also the piping is all un insulated and it has been recomened to insulate the suply piping and re do the wet returns all of the return piping is original and the system is the original at a little over 100 years thats pretty good for buried returns huh there much more work there including rad vents and a couple of bad ly leaking rad valves we'll have to wait till they pay the first bill before we get in any deeper peace clammy
R.A. Calmbacher L.L.C. HVAC
NJ Master HVAC Lic.
Mahwah, NJ
Specializing in steam and hydronic heating

Comments

  • clammy
    clammy Member Posts: 3,094
    series 80

    The weil we used to replace the 78 series was a series 80 and the new boiler has a 52-1 lwco and feeder and a m&m manual reset lwco also 2 operating pressure troll and a manual reset pressuretrol the boiler is burnering 3.50 gph at 150 psi pump after setting her up irf i remenber she was running at about 83 % peace clammy
    R.A. Calmbacher L.L.C. HVAC
    NJ Master HVAC Lic.
    Mahwah, NJ
    Specializing in steam and hydronic heating
  • lchmb
    lchmb Member Posts: 2,997
    Excellent

    Clammy you do some nice work!! Nice to see the detail on your install, and would bet the homeowner is going to be some happy with that system....:) Keep up the good work and stay warm!!
  • Robert O'Connor_7
    Robert O'Connor_7 Member Posts: 688
    clammy..

    You say the lwco has a manual reset? What state are you in? Your using 3 pressuretrols as well? Does the burner have low-high-low capability? Robert O'Connor/NJ
  • Nice job.

    Couple of observations. Wish Weil would can the control tree. Lots of crud washing around right there. Have found too many potential disasters in that 1/2" horizontal line. Not a good idea to put all your eggs (pressure controls) in one basket. Better to install a cross over the 51 & use 2 brass pigtails. Two 1/4" connections off two 1" openings, above the water line, are better than any number off one 1/2" opening close to the water line.

    Noticed the barometric. Balanced draft. Might want to check out Table 15 on page 31 of the 80 I&O. They've slipped in some new breeching requirements. About time. Just wish they wouldn't hide them. That will keep the outside bottom of the barometric from scorching & other things.

    That's what makes this business so interesting. Just when you think you know IT all, IT changes.
  • Constantin
    Constantin Member Posts: 3,796
    Now that's some rusted returns...

    ... how did the old system perform at all with that many holes in the supply piping? It kind of reminds me of a casting section I held in my hands at Viessmann that had been completely plugged with carbonate due to similar abuse...
  • clammy
    clammy Member Posts: 3,094
    thanks

    Thanks for the kind words the 3 pressuretrols are 2 operating and manual reset and the manaul reset probe lwco is a personal thing same for the manual reset high pressertrol as for the 1/2 control tee deal i wasn,t to hot on that either but this was a emercency replacement i tryed to get cross tee but was unable .There still alot of work to be done the returns are all very old and there is alot of start up banging from the lack of any insulation and most if not all of the rads are dug quite deep into the flooring .Of course the ho still insists that before there wasn,t as much noise i never heard the other boiler run but it could not be any quiter since the outlet was bushed the header was copper and the pressurtrol was set at like 3 1/2 pounds but then again the condensate just ran into the floor .So next week i,ll sneck over and insulate the header and some of the mains and replace some steam vents that push air as easly as steam and mr . o connor i.m in new jersey even though it ain,t code i feel it's a better to add a safety to protect the ho investment and cover the co.butt plus i know these people maintance is not on there minds and getting by as cheap as possible is key peaceclammy
    R.A. Calmbacher L.L.C. HVAC
    NJ Master HVAC Lic.
    Mahwah, NJ
    Specializing in steam and hydronic heating
  • Good work clammy

    I wouldn't be too concerned about the 1/2 inch control tree , just think how many steamers are out there with 2 pressuretrols on one 1/4 inch nipple , going strong for decades .

    You can never go wrong with backups for the main safeties either . Replacing a boiler every 5 years can be considered insane .

    I like your pipework clammy . A great improvement over the last system . Hey , you got any pics of what was in there before ?
  • clammy
    clammy Member Posts: 3,094
    I wish ron

    I wish i would have taken pics it was a classic over oxygen corrision from constance water make up the inside of the section where conpletly rusted out the 3rd and 4 th section finally cracked but the 5 section at about 3 inches below the water line where like swiss cheese thw ho's wife said she smelled some thing funny for about a week and then had no heat went to hit the reset and found the boiler pit with about 8 inches of water .The funny thing is she never blew the lwco ever and a few days before she said she heard water running but didn,t think to look any where so when they yelled over the replacement i showed her the tag on the lwco and the holes in the returns she hushed right up since the house was her thing to take care of and she had been informed about a weekly routine for maintance so they still need alot of work like returns replaced vents and the biggest important one insulation .I also don,t like that 1/2 tree and i'll sneck in there and change her up also those lwco 1 "cross tee. thanks for the kind words again ron
    R.A. Calmbacher L.L.C. HVAC
    NJ Master HVAC Lic.
    Mahwah, NJ
    Specializing in steam and hydronic heating
  • Just install some cleanout tees

    on that control manifold . Maybe pipe in a blowdown valve straight out of the boiler after the controls tee . I've piped many a commercial steamer just like you did , but with tees on the end .

    I've been pushing the higher ups to go with all probe LWCOs for every steamer . We all know how often a float type gets blown out when they promise to do it , then see our tail lights through the window and forget all about it . Keep up the great work .
This discussion has been closed.