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The one transformer in the A/C AH has a 3A fuse on the 24v side, and the transformer for the heat (installed in 1963) has no fuse on the 24v side, except for the 15A breaker on the Primary (120VAC)...

FIXED! (I can't figure out why though, since it worked perfectly for 4 years then stopped..) I re-wired the two zone-valves, transformer, and tstats according to a diagram I found on Taco's...

OK - zone valve is rated for 24v and .9A. I compared upstairs zone-valve, which works perfectly.

Upstairs:
25.1v coming from transformer
dips to 21v when valve is opening, and is pulls .91A

...

'Fried' was my word I guess... What I've diagnosed, is that when the Tstat closes its relay, which should send 24v to the zone-valve; there's no voltage. If I bridge R and W on the Tstat, voltage...

Question: The "R" and "Rc" terminals on a Tstat are where the 'hot' line from the transformer connects. Rc is power-for-cooling. Does this mean "R" is the power for heat? Is this how a Tstat...

the Tstat for downstairs is the one that died. The upstairs Tstat is a Honeywell item from ~2002 (programable), but it doesn't go 'click' when a call for heat is made. This older Tstat is working...

Fuse is still intact - I still see 28VAC at the Tstat. I could swap the two zone valves to see if the problem follows the valve - but that's an expensive fix; because it fries an $80 Tstat.

For...

There's a 5A automotive-type fuse that powers the transformer. I think I left something out -- when the Tstat calls for heat, and closes the ckt for heating, the current routes thru one of those...

Can I get a professional opinion? I've been running just fine for 4 years with a Honeywell CT3500 Tstat. Just before Christmas my furnace stopped coming on. I traced this to the fact that the...

The old boiler (from pics of the nameplate)

Federal Boiler model GFS-17. AGA input 175K AGA output 140K net output 123K The house was built in late '64, into '65. Boiler was working fine --...

Question: That smaller horizontally-mounted expansion tank has wording on it, that says it's for domestic hot water expansion. BUT: The tank is definitly on the cold-water input to the tank. Do...

Late-breaking news -- one of the union connections right in front of where they cemented over the flue opening started leaking, and put a puddle on the floor, that was about 10feet in diameter. The...

mech_head said: C'mon, tell the truth, you knew going in you were going to post this here didn't you?
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Oh yea, had the camera ready on this one..

The PVC...

Had to have the old 1965 Federal Boiler replaced.. (Baseboard & Domestic hot water) The only requirement was that it be direct-vented - we recently found out, from a recent PM, that the flue was...

Test to see if I can U/L a pic...


Before caption........
http://mysite.verizon.net/batsona/OldBoilerLeft.JPG
After caption........

Thanks for the words of wisdom. I do recognize that the mfgr. is claiming to reduce the temp. swings by altering the current being fed to the element, which is apparently their claim-to-fame.
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I saw an ad recently for HydroSil elec. baseboard heaters. My house needs some supplemental heat, and HydroSil's "proportional" metering systems delivers just enough current to the element to...

I think I know the answer to this, but I'll ask anyway. Some heaters are called "power-vent", meaning they have the elec. motor & vent fan that sits on top. Does that type of setup *require* the...

My tank is a 40gal unit, with 38,000BTU intput, and 70Gal 1st hour rating. Mfgr doesn't make this tank anymore, so I can't find any other stats on it, like the recovery rating (90F in an hr).

I...

Good point on the showerhead - I have a vintage 1963 showerhead (gasp!) I've just been leery of replacing it, becuase if it twists in the wall, I'll have a leak on my hands, and my house is...

I'm not sure how a service company would be able to fix the effects of a super bargain-basement water-heater. Since posting, I've read about two important stats: a.) First-hour-output and ...

In my old townhouse (built in 1998 actually) we had a 50gal hot water heater. Gas-fired, convection. We could take endless showers & have all the hot water we wanted. Now that I'm in a different...

OP: I guess since that was a joke that meant more to the people in the trade, I guess that's why I didn't get it. --Sorry!

I appreciate hearing all the techs say that doing a superheat &...

If BzzLine is going to be 'funny' when I'm actually trying to be serious, then I guess this thread is closed. I'd posted frequently here in the past & had people respond to me appropriately. Until...

I suspect improper charge from the beginning. --Remember how I stated that the tech had the canister upside-down & tilted to one side & seemed startled when I came up behind him & asked him...