Joined on January 19, 2014
Last Post on January 23, 2014
@ January 23, 2014 9:35 AM in Time Meter for Riello F5 BurnerJune 4, 2013: "Underfiring does nothing but increase fuel usage."
However, you are underfiring your Buderus by 30k BTU but are getting great fuel savings - so that is in direct opposition to what he says...
Anyway - as you state - you can get away with a reduced input BTU (smaller nozzle size) as long as you make sure:
- the stack temp remains high enough to avoid condensation (in your own situation)
- you maintain a good full flame (maybe need to adjust the nozzle type too as well as size)
- watch CO levels (but a proper stack temp should negate that)
This should all be done using a combustion analyzer...
So a WS-4 with a factory .90 firing rate (.65 @ 190psi) can probably work just fine dropping down to a .77 firing rate (.55 @ 190 psi) yielding a savings of about 14%, especially if the boiler is slightly oversized to the heat loss right now (to account for a future home addition)...
@ January 22, 2014 12:07 PM in Time Meter for Riello F5 BurnerRunning the burner at lower input BTU than what the manufacturer recommends.
For the WS-3 with NX the spec is a .75 gph firing rate for 105k btu input/hour. Am I correct to say that for #2 oil at 138,500 btu x .75 firing rate = 104k btu is how they arrive at this input?
So you are putting in .55 gph x 138,500 = 76k btu input/hour or 30k btu less. Besides the reduction of .2 gph in fuel use - what other benefits are derived from making this change...longer more efficient run times? What are the potential negatives? How low can you go before there is a problem? Is this based on stack temperature - you can go as low as +/- 325 degrees stack and run the boiler safe and efficient?
Thanks for the insight...
@ January 21, 2014 7:00 PM in Time Meter for Riello F5 Burnerhouse size ;-)...
and the .55 nozzle - at a 190 psi, it's more like .75gph.
@ January 20, 2014 5:02 PM in Time Meter for Riello F5 Burnerwhich of the wires goes to B1 and do any go to B2?
YES - the logamatic is the king of controls!!!
@ January 20, 2014 3:09 PM in Time Meter for Riello F5 BurnerHello.
Just purchased Buderus WS-4 and Riello F5 with Fuel Smart Hydrostat 3250plus.
Surprised that with all this new equipment there is no run time information.
Would a ENM T39 Dual Hour Meter/Counter Combo do the trick for me?
Tracking run time is the main info and the counter will tell me how to account for the purge time...
How do I install this equipment - at the Hydrostat or at the Riello connection?
Here is the pdf info for the meter/counter: http://cfnewsads.thomasnet.com/pnn-pdf/20017618.pdf
Any help appreciated. Thanks.
@ January 20, 2014 12:14 PM in BTU MeterHi - I have a Riello burner working a Buderus.
Want to watch my runtime and was shocked to see that a runtime meter is not included with the Fuel Smart Hydrostat 3250 plus control unit.
If this is a simple solution - where does it get wired into the system?
@ January 20, 2014 8:58 AM in Why would i want a mixing valve for my indirect hwh?Thanks.
@ January 19, 2014 8:05 PM in Why would i want a mixing valve for my indirect hwh?recently installed Buderus WS-4 and S32 indirect.
the indirect's heat demand is being driven by it's Honeywell aquastat which I had them set to 140 degrees.
why would i additionally need a mixer off the boiler to feed the indirect? does that save fuel usage? does the lower temp used with the mixer reduce the recovery?
@ January 19, 2014 7:35 PM in Boiler Correct SizeI'm NO expert but just went through a new install myself. Did a lot of research and got smart fast. You should do a heat loss calc - there is a cool one you can use with a smart phone from slant fin.
You are definitely over sized. I have a 2,700 sq ft ranch with a 1,000 sq ft finished bsmt (but i keep the bsmt at 60 degrees). I just got a Buderus WS-4 which some may say is over sized for me at 95,000 net btu but I bought it to accommodate a potential 600 sq ft upstairs addition. i came off a 1984 125k weil mclain. you should bring that installer back and have it swapped out.
@ January 19, 2014 4:08 PM in From old to new oil setup - a great transformationFinally bit the bullet and upgraded from a 1984 Weil 125k net Btu + direct fired 50 gal hw heater to a brand new Buderus G115WS-4 with Riello F5, S32 indirect hw heater, Fuel Smart Hydrostat 3250-plus, Tigerloop ultra. 4 zones heat + the indirect. 2700 sqft ranch plus 1000 sq ft heated bsmt. The WS-4 gives enough firepower to handle a 600 sqft master BR addition upstairs if desired by me or the next owner. Was using about 1500 gals/year...hope to see nice payback.
Thanks for all the insight I gleaned from this and some other forums...
Here are the before and after...