It's a one pipe systemI was really looking for more if a simple answer. The btu is correct for the house. Why 2 pumps would be needed still doesn't answer my question
ok. you want to keep it simple. So when it doubt... JUST freakin’ TRY IT!!! If it gets the job done, then yeah. you can do it. JUST freakin’ TRY ITI'm replacing a boiler with a navien on a one pipe system. But it's showing this manifold setup. Do I need this installed? Can I not just tie the return in the return. Supply in the supply. Of course unions valves expansion tank ect...
OMG, Terry is using software to edit my use of the word "Gosh darn golly", shit, cunt
hah, it's just a FVck filterOMG, Terry is using software to edit my use of the word "Gosh darn golly", shit, cunt
I was really looking for more if a simple answer. The btu is correct for the house. Why 2 pumps would be needed still doesn't answer my question
90' x ~500 BTU/hr per foot = ~45,000 BTU/hr.
I plumbed it in primary and secondary with to pumps. Exactly the way shown in book. You say I have to dial it back? Is that easy
That's the most heat your radiation can deliver at the maximum temperature settings for this series. Seems like the NHB-055 is a good fit. The extra 50K of burner for the -110 buys nothing. But with 90' of baseboard operated as a single zone you'll still be OK with the -110:
90' x 200 BTU/hr- 18,000 BTU/hr.
That means you have enough radiation to run the NHB-110 in a condensing mode without excess cycling, since it can dial back to about half-that at low fire. (If you've already purchased the -110, there is no need to return it and incur restocking charges, etc.)
Calculating the pumping head of your radiation takes more complicated math, and a better description/measurement of all the pipe diameters, lengths, fittings, etc. Hydronic design software makes it easier to spec the pump, if pumping direct through a high pumping-head boiler, which is why it's safer to plumb it primary/secondary using closely spaced tees as the hydraulic seperator, and us a high efficiency pump (eg Taco -007e ) for the boiler loop.
You'll be fine without the second pumpThanks for your help. When the unit was bought there was intention of running another 80 feet on another floor. This got cancelled. So what I gather is it is better to have a pump on the return with the loop. And another pump on the send after the air scoop expansion tank setup
I called navien tech they said 2 pumps is mandatoryYou'll be fine without the second pump
Unless I ditched the whole manifold setup one pump wouldn't workI called navien tech they said 2 pumps is mandatory
This is awkward, but...
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