Circulator reccomendation

rconkling

Im wondering if a new circulator would improve my system.

I have a converted gravity hot water system with 8 radiators in a 2 story 1929 brick house. The boiler is a Dunkirk 125k btu natural gas.

Last season I installed a Caleffi boiler protect valve to get boiler water temps up. Prior to this install, the temp gauge on the boiler rarely reached 130* Its now sits at 110* with just the pilot light, so it reached 130* very quickly.

But, this threw off the balance of the system, not all that surprisingly. 2 radiators barely ever got warm, others roasted. When the temps got cold last winter, upstairs was 80* and downstairs where the T-stat is, was 67*.

This week I had 5 TRVs installed. Leaving the smallest/coldest radiators as-is as well as the one nearest the T-stat.

Im hoping for a nice drop in NG consumption this season!

Now im wondering if a newer ecm circulator, with constant or proportional pressure would be beneficial? Currently it has an older Taco 007-F4.

Cheers

Ryan

hot_rod

Yes a delta P mode would be ideal with TRVs. Idronics 16 explaining how the different settings work, depending on your piping.

I think the new Grundfos Alpha 15-58 has AutoAdapt in all the modes now. So select the mode and the circ learns your systems hydraulics and self balances. Search for You Tube videos showing how that circ works.

Fuel savings would come by lowering the temperature in rooms where you now have TRV controls.

Heating cost is directly related to inside vs outside temperature. Lowering the temperature in un-used rooms, or evenings in bedrooms would show some small fuel savings.