weil-mcclain steamer

keith_27

anything in the codes stating that the header has to be welded ?? replacing this weil-mcclain boiler about 21 years old. The present header is 3 " pipe and welded. ??

Steamhead

Nope

and if someone tells you they can't install 3-inch threaded pipe, find someone else. We do it all the time and it's not rocket science.



What model W-M is this? What's going to replace it?

keith_27

weil-mcclain steamer

Thanks Frank. The present weil-mcclain boiler is a EGH105. They still make this model and i will be installing this one. The present header is welded.

keith_27

weil-mcclain steamer

pictures

Steamhead

This boiler has a 3-inch header

Not a W-M, but you get the idea:



http://www.heatinghelp.com/forum-thread/146210/This-Weeks-Steamer-Replacement



Replace that header. I'm surprised the old boiler lasted that long with a welded yoke like that.

Charlie from wmass

Keith have you sized the system?

are you sure this is the boiler the system requires? As of late I have seen boilers both over and undersized so I had to ask.

Charlie from wmass

have you looked at a wet base boiler?

if you use a wetbase boiler with a power burner you can squeeze more saving out when running the boiler.

keith_27

weil-mcclain steamer

There is 2": baseboard elements in two shop bays and six unit heaters in the busniess at different areas. Sized the elements and unit heaters and did find that the btu,s of the boiler is a tad short. The mechanics in the shop do keep the heat set back and the owner has been happy with what has been in there for the past 20 years.

SWEI

How short

is "a tad short"?

Charlie from wmass

The sizing is more off if the rooms are not kept at 70

Steam required goes higher per EDR as the room temperature goes down. Too small of a boiler will waste fuel with extended run times for heat. Are the units individually controlled for temperature?

keith_27

weil-mcclain steamer

Its a two zone system. The shop area and the unit heaters.. About 10,000 btu short. It does have another boiler that takes care of the office,break area and the owners office. It is a rental store and there have been cases of no power and heat breakdowns in which the owner used the propane heaters.

Charlie from wmass

If it is zoned

then being undersized is not that big of a deal.

SWEI

I was wondering about that

The combination of pickup factor and zone diversity should change the math somehow.  Is there a recipe?