Steam replacement

Dave0176

2007 installed Burnham V84 boiler, rotted on one section and starting to corrode on the others. He decided to convert to gas, we installed a Union Steam GSA 125,000 (EG40) I’m also going to put a two stage gas valve when my parts arrive. Totally finished basement so we had to snake Wardflex through the rafters to get gas to the boiler, all went well, but was back breaking job.

EzzyT

Beautiful install as always @Dave0176.
I like the water seal you have on that boiler.

New England SteamWorks

Beautiful. I like the VXT nice and high against the wall, easy to see and work with. Picture perfect.

Dave0176

EzzyT said:

Beautiful install as always @Dave0176.

I like the water seal you have on that boiler.

Thank you Ez for teaching us pigtails suck.......

EzzyT

I can't take the credit for that.

MilanD

Beautiful, @Dave0176! Why 2 stage it? Are there zone valves or TRVs on the rads?

Dave0176

MilanD said:

Beautiful, @Dave0176! Why 2 stage it? Are there zone valves or TRVs on the rads?

No, it’s to modulate the fire to maintain between 4-10 oz steam pressure. Starts on high fire as pressure rises in the system when it reaches 10 oz the Vaporstat kicks the fire to low.

Dale_3

Nice install.

Phil53

Dave, Very nice work. Just wondering what is Wardflex?

MilanD

> @Phil53 said:
> Dave, Very nice work. Just wondering what is Wardflex?

Csst gas line brand.

Dave0176

Phil53 said:

Dave, Very nice work. Just wondering what is Wardflex?

@Phil53 Ward Flex is Wards version of flexible gas line aka CSST (corrugated stainless steel tubing).

MilanD

> @Dave0176 said:
> Beautiful, @Dave0176! Why 2 stage it? Are there zone valves or TRVs on the rads?
>
> No, it’s to modulate the fire to maintain between 4-10 oz steam pressure. Starts on high fire as pressure rises in the system when it reaches 10 oz the Vaporstat kicks the fire to low.

Ahh, got it. Thanks!! I didn't think it was needed on properly sized boiler. We have it and does great with zones. When all are calling, never above 8 oz. With 1 zone closed, modulates at 8. Super nice. I suppose I never thought to modulate even with all zones calling. I'll play with that this winter.

Paul S_3

beautuful installation @Dave0176

jgach11886

Looks great! I would love to do this one day!

mikeg2015

MilanD said:

> @Dave0176 said:

> Beautiful, @Dave0176! Why 2 stage it? Are there zone valves or TRVs on the rads?

>

> No, it’s to modulate the fire to maintain between 4-10 oz steam pressure. Starts on high fire as pressure rises in the system when it reaches 10 oz the Vaporstat kicks the fire to low.



Ahh, got it. Thanks!! I didn't think it was needed on properly sized boiler. We have it and does great with zones. When all are calling, never above 8 oz. With 1 zone closed, modulates at 8. Super nice. I suppose I never thought to modulate even with all zones calling. I'll play with that this winter.

I think there's a good argument that you size for load & a healthy 50% pickup, but then down fire just to match load only... plus you could use a few TRV's for rooms with varying heat loses or small sizes like kitchens and bathrooms.

How much pressure you need is then just a matter of the size of your header relative to the boiler size and size of your vents.


Beautiful install. Like the 2 supply's to the header. It's not a large boiler but I'll bet the steam is nice and dry with the extra pipe.