Best Of
Re: Air to Water Heat pump controllers
What size are these 3 units?
What is there now for controls?
I'd let the manufacture control the air to water temps.
pecmsg
Re: Weil Mclain H-9 boiler from the 60's...
That setup does use a thermocouple- it is connected to the White-Rodgers "automatic pilot" control, which cuts off the electricity to the main gas valve if the pilot goes out. But it is not a "100% shutoff" system since the pilot gas is not cut off if the pilot goes out.
Converting that would require a combination gas valve that could handle at least 560,000 BTUH. ISTR Robertshaw makes these. You'd reroute the thermocouple and pilot tube to the new combination gas valve, remove the separate pilot valve and plug the opening.
Re: What would cause such rapid destruction of valves?
Chemistry says: If glycol becomes acidic, it becomes an electrolyte and your combination of iron, copper, brass, bronze becomes a battery or multiple batteries. The frost on top of your Fill valve is whitish and slightly blue? Not iron. Not copper. Maybe Zinc. The acid and electricity can bust the zinc out of copper-zinc brass over time. Maybe faster if more volts in the batteries. I suggest you measuring galvanic voltage and external voltages between all near and far parts of your heat system and plumbing pipes.
Re: What would cause such rapid destruction of valves?
so that Cryo-tech antifreeze that leaked out would cause that much corrosion?
Re: What would cause such rapid destruction of valves?
Speaking as a homeowner,
Galvanic Corrosion, also known as bi-metallic corrosion caused this.
If you are going to keep this plumbing as is-
When replacing the parts you should be using bronze fittings/pipe nipples etc. all the way back to the heavy wall pipe and tees, and a bronze shut off valve and bronze pipe nipples to shut the boiler water off from the pressure regulator as you should only be filling the system ONCE and shutting the water off and leaving it off. You also need a back flow preventer piped before the water feed and pressure regulator.
leonz
Re: Heating not working in the floor where the distribution system was changed
Releasing trapped air is one of the high points in my day. So satisfying.
Re: Is this a house trap?
Easy to snake out to street sewer & in to building. In NY, we'd do this is cast Iron but pvc may be fine out where you are. Mad Dog
Re: Is this a house trap?
In any case, this was not a proper installation from the day in went it. If they can't get their snake through the trap, you're best off cutting that out & install a proper clean out tee as your first fitting past the foundation, replace the trap and tie in the fresh air inlet properly. Mad Dog
Re: Cold water is hot due to amateur plumbing
if you innstall the check on the feed to the DHW, you might / will need an expansion tank on the hot side since the DHW will be isolated from expanding back to the house side,
and what Ed Mad Dog says, Cross Connections ?
neilc
Re: Weil Mclain H-9 boiler from the 60's...
I think the idea was that the pilot would never go out. IF the pilot ever went out, the small amount of gas would just "float" between the cast iron sections and go up the chimney. We have seen many old boilers and many old kitchen stoves with this type of pilot.
