Proper Circulators - P/S Piping with Thermic Vavle

Tom Hopkins

Hi all-

I recently moved into a 3200 sq. ft. 1920s house and need some input on my options on re-piping the boiler. I currently have a single zone converted/closed gravity system with CI radiators. The boiler is approximately 10 – 12 years old and rarely get to 160 degrees and will spend hours at or below condensing temperatures working it’s way up to 140+ degrees (from a cold start). I’m currently looking at an ESBE thermic valve with P/S piping as recommended by the manufacture since it will be used in a converted gravity system. I’m on my second reading of Dan’s P/S pumping made easy, but need some help with circulator sizing. I believe the secondary circuit feeding all radiators will require approximately a 24 GPM circulator due to the conversion, but am at a loss on how to calculate the primary boiler circuit circulator size. Any help is greatly appreciated. Below are all of the current specs of the system.

Utica MGB Series 175,000 BTU Boiler, DOE 143,000, 1=B=R 124,000 BTU/HR

Taco 007-F4 (currently pumping from the return into the boiler and expansion tank)

Total Heat Loss - 112,594 BTU/HR (Slant/Fin Program)

Total Sq Ft EDR – 964.5

Let me know if you need any other information. Thanks for your assistance.

Unknown

Jason,

wondering about these , yes you should have one.

Dave

Unknown

Sounds like

you need this

I have NO IDEA why this link wont open??
Hope I posted the right-one LOL!

Dave