Best Of
Re: Top draw Roth problem
Start off by turning off the two outside tanks. Make sure they are really and truly off. Now. Can you prime the burner pump from the Roth? If not, you have a vacuum leak somewhere in that line and that needs to be found and fixed.
Re: Gas boiler heating house without call for heat
@EdTheHeaterMan posted the 'CR' bypass back on page 2 when we started to have a discussion about that method. Color image with B&W image in the Lower Left corner and his annotations as what to change. At this point I'd put the replacement relay in as proof that it all works as expected. You can always change it later if you want to.
109A_5
Re: Leaning B Vent
As long as its not leaking, I'm more concerned about the distance/height to that window...Mad Dog
Re: Gas boiler heating house without call for heat
damper was probably open from the stuck relay and closed when you powered it with no heat call.
mattmia2
Re: New Century House with Two Pipe Steam - Questions
That's called a "lock-shield" valve. And the part you're holding in the pic is the key.
Re: Cast iron boiler replacement with Navien High Efficiency Condensing Boiler NFB 200H
Contrary to popular belief, the client isn't automatically correct. That said, try at least to be sure that the installed radiation can support the full output of the chosen boiler.
Re: Cast iron boiler replacement with Navien High Efficiency Condensing Boiler NFB 200H
EEEK. Is that poor boiler really sitting in a pit? Asking for trouble.
Step 1. Make sure you have the sizing right. Mod/cons are wonderful gadgets, but they do need to be sized correctly for the load. So… a building heat loss is in order.
I'm curious. Why two pumps in series like that? That makes no sense at all. You are going to be running primary/secondary, I hope, so two pumps will be needed — but not in series as you suggest.
Re: original circulator sized too small?
@wyatts If you are experiencing some cold spots in your house, it may be due to that there is 121' of baseboard in one continuous loop, typical max length is around 70'.
When you exceed that 70', the last pieces of baseboard start to see lower temperatures and therefore don't put out enough heat (unless the lower temp was compensated for and more element was added) and then calculations were done based to fine the flow rate and head loss and then choose the proper circ.
Don't assume the boiler is closely matched to the heatloss of the house. 10 times out of 10, it is oversized.
What problems are you experiencing to say that the circ is undersized?
Dave H_2
