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WISE EYES NEEDED -- PUZZLER: What's Wrong With This Picture ? HYDRONIC Baseboard
Hello ! New to forum, but reading lots! Just a homeowner, but not physically able to do my own piping, so rely on the kindness of strangers for heat. I like to understand systems, so I've been reading and learning lots from you..some wonderful amazing kind souls here, bless you, and very much appreciate the tone and respectful approach the forum takes. This forum is the perfect blend of theory and practice, which makes it uniquely fabulous and helpful!
Before I sell my car to pay for a whole new system, maybe there is a basic re-pipe correction to be made ?
I thank you kindly in advance for all ideas and thoughts.
~~ homeowner, DEL NEWBIE (Mini-Therm near N. PA)
Here's some tech details, but assume some newbie errors, of course:
Issues: Laars Teledyne boiler WHINE, and LOW HEAT @ Baseboard ~115 even with 180 degree supply and pressure drops over 2 weeks so makeup water added often, possible LOW FLOW, possible SHORT CYCLING and likely not using NG efficiently. Train (KETTLING?) noise if bypass valve is not 100% open, (I have read the good Whining Laars threads),
2-story House Square footage 2000 (8 ft ceilings with one great room 22 ft ceiling lots of windows), House 1970s insulated but leaky, poor foundation joist insulation, Altitude 1300
Heat Loss calculator said for whole house (Slant Fin) 80,000 btu
Heat Load: hmmm, one calculator said 70,000k but, only 27,000 btu if all baseboards are calling, (Original installer did not install ANY check valves or backflow preventers.)
System has no flow meters, no balancing valves, just the psi meter on the boiler itself.
Boiler manifolds are copper 1 inch with reducers to 1/2" outputs to PEX-PAP 1/2" (Kitec XPA)
Spirotube Fin Baseboard with all 1/2" pex inside baseboards
SpiroVent , Expansion Tank, Pressure Reducing Valve, thermocoupler, pump (each replaced once), Laars JVS-75 Mini-Therm NG Boiler (Net IBR 55,000btu)
Indirect Hot Water tank: Vaughn (replaced after 3 years due to leaking--we think installer dropped it)
Question: which circulating pump is best for this system (am looking at the Grundfos 15-58), as I suspect issue, & is 1 pump enough?
(Was ready to add circulators to every zone until I watch Siggy's video from the conference about one circulator systems)
My brain exploded when I tried to figure out head pressure.
Thanks for ideas !
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