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Joined on January 19, 2014

Last Post on September 3, 2014

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Not a "loose goose"

@ September 3, 2014 7:16 PM in From old to new oil setup - a great transformation

New system not commissioned until January - was getting soaked by the old system for half the season...

Looking forward to 700 gallons for the full season this year!

Working GREAT

@ September 3, 2014 2:53 PM in From old to new oil setup - a great transformation

We used about 1,000 gals for this season.
The house never wanted for heat...and we never had any problems with running out of hot water.
Additionally, since the winter, I installed the outdoor air temp sensor on the Hydrostat to have the system run only on demand from the indirect water heater.

Couldn't be happier. The system runs quiet and does the job.

Thanks - Jim Davis disagrees with the underfiring concept:

@ January 23, 2014 9:35 AM in Time Meter for Riello F5 Burner

June 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)...

I'm curious about the benefits and negatives to running at reduced firing rate:

@ January 22, 2014 12:07 PM in Time Meter for Riello F5 Burner

Running 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...

Of course it's all relative to...

@ January 21, 2014 7:00 PM in Time Meter for Riello F5 Burner

house size ;-)...

and the .55 nozzle - at a 190 psi, it's more like .75gph.

if there are 2 wires coming out of the counter then...

@ January 20, 2014 5:02 PM in Time Meter for Riello F5 Burner

which of the wires goes to B1 and do any go to B2?
thanks again.
YES - the logamatic is the king of controls!!!

would this work - looking to do the same thing?

@ January 20, 2014 3:09 PM in Time Meter for Riello F5 Burner

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:

Any help appreciated. Thanks.

where does this get connected

@ January 20, 2014 12:14 PM in BTU Meter

Hi - 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?

Ok - understood

@ January 20, 2014 8:58 AM in Why would i want a mixing valve for my indirect hwh?


Why would i want a mixing valve for my indirect hwh?

@ 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?

do a heat loss calc...

@ January 19, 2014 7:35 PM in Boiler Correct Size

I'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.

From old to new oil setup - a great transformation

@ January 19, 2014 4:08 PM in From old to new oil setup - a great transformation

Finally 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...