[nycbug-talk] OT: I need a new steam boiler

[Mikel King]

On Jan 7, 2013, at 4:04 PM, Mark Saad <mark.saad at ymail.com> wrote:

> Mikel, I will definitely need to buy that inverter. So far every boiler guy said its 24VAC only no DC .
> 

You will want to connect the batteries in parallel for the 12Vdc source this will give you more amperage. I have two 15watt solar panels I picked up from Northern Tool that I use to keep my batteries charged, depending on usage you may need larger panels. Also note that that inverter is 40watt but they do sell larger ones depending on need. 

> Brett , thanks for the insight in the use of VAC, I saw some talk about running a lennox on VDC but I did not follow the line of thought in the post. .
> 
>  The kick in the balls is the efficiency requirements they now have. I will have to hack the install after its  approved by the town. For one there is a positive air flow sensor. This is used to determine if you have good combustion air . No positive air flow the control system trips the boiler . You end up with a new having to get a new vent  IMHO since this is not a high pressure boiler used by conEd I could care less about this. I am not even sure how much this improves the burner.  
> 
> 
> 
> 
> On Mon, Jan 7, 2013 at 11:34 AM, Brett Wynkoop <wynkoop at wynn.com> wrote:
> On Mon, 7 Jan 2013 10:12:34 -0500
> Mark Saad <mark.saad at ymail.com> wrote:
> 
> > All
> >   So I had the first of 5 boiler makers / plumbers show up and tell
> > me what they can do. This guy said the boilers he installs are 24VAC
> > powered , he did not think you could easily run them off batteries;
> > and that I should speak to an electrician .
> >
> > The funny thing I still can not figure out is, why the hell do
> > boilers user AC and not DC ? Does anyone know why ?
> >
> 
> They are low voltage for safety.
> 
> They are AC for simplicity.  No need for rectifiers.
> 
> If this was 30 years ago with electromechanical thermostats and
> controls I would say you could interchange DC for the AC, but with the
> new controls I would not do that without talking to the thermostat
> maker and the boiler maker.
> 
> 
>                               Bi-Metalic-Strip
> 
>         24v AC o-------------------------o/ o--------
>                                                      3
>                                                      3 Fuel Solonoid
>                                                      3
>                o--------------------------------------
> 
> 
> The above is the control circuit of a boiler 30 years ago.  It will run
> either AC or DC as the thermostat and solonoid will normally operate on
> either.
> 
> With today's modern units I am sure they have replaced the simple
> bimetalic strip with something electronic and who knows what the fuel
> solonoid looks like.  It may not actually be electromagenitic any more.
> 
> Check with the maker of the boiler and control systems.  The installer
> will not know how it works, only that he needs to connect it up like
> the instructions say.
> 
> -Brett
> 
> --
> 
> wynkoop at wynn.com               http://prd4.wynn.com/wynkoop/pgp-keys.txt
> 917-642-6924
> 718-717-5435
> 
> 
> 
> 
> -- 
> 
> Mark Saad | mark.saad at ymail.com
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