Biasi boiler options

J Atchinson

thanks for your thoughts and input. Just to add that while I can appreciate the benefits of a chimney in some situations, it's not an option in this case. Hence, one of our goals to get the cleanest burner for the direct vented Biasi. We still have not settled on Beckett NX or Riello but are leaning toward Riello because we been told there is close connection between the manufacturers. As for the size, we are using an inverse indirect tank for DHW so we feel the load should be at least 25% higher than the heat loss calc. Also, it's an old house so some of the insulation assumptions for the heat loss calc may be a bit optimistic. Our heating contractor would prefer to put in a model with more than 100 btu, preferring to err on the high side...
Again many thanks for the perspectives as we told the heating contractor we'd have a decision on Monday for the Thursday installation...

J Atchinson

Biasi boiler options

We need to make a boiler decision in the next few days for a new system, retrofitting our old (circa 1860) house. After researching possibilities, we have decided to go with a Biasi and need to decide on the specifics of the size and model, and we hope that some folks here might have some thoughts. The installer has not done a Biasi system before, and although he thinks it's an appropriate choice, he has no direct experience to offer.

The basic facts: the house is about 2300 sq.ft with an addition 1000 sq.ft of unfinished basement that will be for mechanical and work area, and a heat loss calc shows of 59-60000 btu. There will be panel radiators in the 1st and 2nd floors and radiant floor (concrete) in the basement, with hot water coming from an inverse indirect tank (turboMax) which will also serve as a buffer tank for the system. We plan to run the system at about 160f using appropriately sized radiators, and we anticipate being able to use solar panels to supplement the system in the future.

We are considering both the Biasi B or SG series direct vent models, output in the 90 -110 range, with either a Riello or the Beckett NX burner. Since it will need to vent relatively near a set of windows, we are particularly concerned that the system run as clean as possible. We have been running a beckett NX (chimney vented) trouble free in our other house for about 10 months so we feel comfortable with that as an option, especially with SG.

Any thoughts about the best options will be greatly appreciated. Thanks in advance...

Robert O'Brien

If

the heat loss is 60k why use a 110k boiler? I would go with a chimney if at all possible,direct vent would be my last option.

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Ragu_5

I Agree With Robert...

In my personal experience, even thoug dirct vents have both U.L. and C.S.A. approval, they don't always work correctly; please be forewarned! You cannot beat a masonry chimney for vnting an oil-fired appliance.

If you would like, I would be more than happy to Email you a paper I wrote on this subject. Please contact me at: hydronicman@peoplepc.com

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Wayne_10

Basi Boilers B10/5 Section

I installed about 15 Basi boilers through my company. There a great boiler except im not a fan of the NX Burner. The reason is that I can't get the gross stack to go past 300 gross stack. I called Basi they told me to up fire the boiler past the max firing rate. On a 5 section its a .75 60B nozzle@180psi. When I went to a .85 60B that brought me to a 325 gross stack temp still not enough.I called again so the told me to put a slice through the smoke pipe and drive a piece of sheetmetal in until I get a 324 net. Then bend it over and zip screw it in. Nice balffel but not sure I like doing that. Even installing the blanket in the bottom of the chamber didn't help. Another thing I found on a chimney vent is that the wiring of the boiler and NX is that the put line and limit on one side of the 4006 the other side is out of p2 on the Lwco. Fine but no post purge on the burner. They tell me why do you need to post purge on a chimney! Besides that no problems with the boiler or the NX burner yet! Go with the better burner Riello

joeoilman

biasi is a good boiler. nothing wrong with the nx. very nice burner. put it on a primary loop so the boiler stays warm enough. use a gas aquastat relay,keep the burner live all the time & run your call for heat through b1/b2 & you can have the post purge too.

brucewo1b

I called again

so the told me to put a slice through the smoke pipe and drive a piece of sheetmetal in until I get a 324 net. Then bend it over and zip screw it in. Nice balffel but not sure I like doing that.

That is called a neutral pressure point adjuster, and sometimes it's just what the doctor ordered Check in out on page 24

Netural Pressure

Dick Charland

My question is why would a Riello give you a higher stack temperature. The firing rate for both burners being the same, the stack temperature is more a function of the boiler than the burner. Both good burners, I'm puzzled by the reasoning?