Vaillant F-100

Mike E_2

I have a Vaillant F-100 50 HE oil-fired hot water boiler that was installed in the early 90's. It has a Beckett AFII burner with a 1.25 60 B nozzle at 140psi. (1.5 gph total) For the most part, every room in the house is its own zone by means of B&G zone valves. I have a few questions that hopefully someone will be able to help with.

1. Does anyone know of a place to find information about this boiler. I can't find my manuals and other paperwork anywhere. I just got the name of the local company that sold Vaillant's back in the 90's, and will call them tomorrow. Hopefully they held onto that kind of stuff.

2. There is quite a bit of chimney roar in the first floor living room (has stone fireplace on one wall with furnace flue running in it). Does anyone have any suggestions for reducing this. I have read that some boiler/burner/chimney combinations will do this and there isn't much that can be done about it, but hopefully this isn't the case.

3. How low can I down-fire the boiler. I used to have my garage/workshop heated off of it (about 60,000 BTU), but now I use a different heating system in there. As a result, the boiler is oversized for the house and short cycles quite a bit. I know that the AFII burner has a range from 0.75 to 1.5 gph, and that you use different set screws that correspond with the nozzle size. But how low can I safely drop when attatched to this boiler.

4. I have read that the Beckett Heatmanager is an useful control for systems with many small zones, as it will help to prevent some short-cycling. I have read through old posts on this site and other sites, and have seen that some people have had problems with it. Does anyone have any insight as to whether this was a result of a new product, and now that's its been out for a while, the kinds have been worked out and it works better?

Thanks for your help.

Michael

Bob_61

Hey Mike,

The Beckett Heat Manager will work great. The few problems they were having in the beginning were corrected early on. No more problems. Very easy to install. Will help the short cycling dramatically.

Bob_61

Delavan .85/60deg B at 175psi (1.13gph Firing Rate)
6 slot Head preferred.
#5 Firing Pin

joel_19

HE100

Was a nice boiler much better than the 75 the AF2 was tricky to get set up though . I'm with Bob more pump pressure , smaller nozzle . I'd try a W instead of a B but that's just my personal preference B might Be better. A smaller nozel means less air as well should help with the noise .