Prestige Solo wiring

tim smith

> I will be adding an external LWCO to the Prestige <BR>
> Solo 175. I see Triangle Tube has two terminal <BR>
> connections for external limits. If I use 15 and <BR>
> 16, and remove jumper, is there 24V there. Or do <BR>
> I add a transformer also. If I use a 24V LWCO, <BR>
> like the guard dog, the two yellows go to the <BR>
> terminals, but what about the Red and White (C) <BR>
> wires and ground? Or is it easier , just to use <BR>
> a 120V LWCO in series with boiler?<BR>
> <BR>
> _A <BR>
> HREF="http://www.heatinghelp.com/getListed.cfm?id= <BR>
> 377&Step=30"_To Learn More About This <BR>
> Professional, Click Here to Visit Their Ad in <BR>
> "Find A Professional"_/A_ <BR>
<BR>
We usually use 120 volt in series with power supply. Just easier we feel. Tim

singh

LWCO wiring

I will be adding an external LWCO to the Prestige Solo 175.
I see Triangle Tube has two terminal connections for external limits.
If I use 15 and 16, and remove jumper, is there 24V there. Or do I add a transformer also.
If I use a 24V LWCO, like the guard dog, the two yellows go to the terminals, but what about the Red and White (C) wires and ground?
Or is it easier , just to use a 120V LWCO in series with boiler?

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tim smith

prestige lwco wiring

We usually use 120 volt in series with power supply. Just easier we feel. Tim

Uni R_3

Do you have to have a LWCO?

The flow switch will shut it off if it when it drops below 10 psi, or if the temperature ramps up too quickly it shuts down. Both of those would happen before the mechanical LWCO trips on being dry. By then most m-c boilers might be toast. My guess would be that the LWCO would be the weakest link in the dependability chain and ultimately stop the heating system for nothing.

singh

A must

I'm required not only by state codes, but this is going into a facility saying I have to install both high limit with manual reset and LWCO.
I'd explain the built in pressure switch to the maintenance personal, but at this point, give him what he wants. He's not sold yet on these new fangled mod/con boilers : )

Thanks.


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Uni R_3

The codes are obolete

If they want safety, the high limits switch along with a secondary pressure switch that would cut all electric. I'd just make sure that secondary pressure switch trips around 5psi.

The standard Prestige setup was accepted here by the building inspector - my boiler isn't the lowest point, so low water protection was a requirement here. Common sense shouldn't be so uncommon with these code interpretations. ;-)

singh

I hear ya Uni R

Actually, NYS enacted LWCO's in 2003 code.
There is also buried copper lines here feeding baseboard.

When a state inspector comes to this facility, he/or she wants to see something.

Regardless, I will add an external LWCO, just want to know other than 120V in series, what about using a 24V.

Devan


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hot_rod

Also the 120V seem

more reliable than the 24v for some reason. Combined with simple wiring it's an easy choice.

hot rod