new boiler and vapor system

t. tekushan

I would add a fudge factor to the EDR you calculate because the piping sizes were designed for all of the EDR. So, instead of 1.33 you might consider say, 1.5 times the remaining EDR. This should prevent excessive warming times upon cold start-up.

ed wallace

new boiler and vapor system

looked at a boiler tonite its an old smith no.24 in a pit its a 2 pipe vapor system that has been running on 4 lbs of steam lowered pressure to 1.5 lbs will be replacing steam traps will be replacing boiler in the future boiler is way oversized due to removal of radiators over the yrs thinking of filling in the pit when replacing the boiler water line on a more modern boiler will be at the same hieght or slightly lower then current water line anyone see a problem with this

t. tekushan

shouldn't be a problem

@ 4 pounds pressure, it doesn't sound like it was very much a vapor system anymore! The lower boiler water level shouldn't be a problem with a 2 pipe system with dry returns anyway. Just be sure the return is properly vented. I might add an end-of-main vent with the pipe sizing typically used in vapor systems. We have a vapor system in this building and I questioned the wisdom of using an end of main vent on two pipe system. But heat distribution at the end of the main during mild temperatures was lousy. "So what's the harm in trying?" I thought. Tried it. It works great (for 5 years now). Heat distribution is most loverly even in the mildest temperatures.

Steamhead

Make sure

the waterline will not be higher than that of the old Smith. It can be lower as long as it doesn't uncover any loops in the return piping.

I personally think boilers in pits are way-cool......

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