Hopefully the impeller failed catastrophically in one event which would stop the water flow and keep the bits pretty close to the pump. If it lost pieces over time they may have gotten circulated to other parts of your system.
What is the full model number of the Taco pump? The recent versions have a nylon impeller - which I wouldn't expect to shatter. And they are now white.
While there are many reasons for the impeller to fail, a whole house water filter on feed to both boiler and DHW system eliminates or reduces many problems. Often rust particles from city water main systems raises havoc in may ways.
Filters with clear plastic housings are best. Some have built in valve for shut off when changing filter. There are many types, this is low cost.
Life of impellers on DHW circulators can be extended with a small, wire screen, $47 filter. Periodically can flush, back- wash debris by opening bottom valve.
I have this pressure valve that sits right after my Taco circulator pump and just before the heat exchanger.
Anyone know the model number and what its purpose is?
Currently it looks like it's set to full open.
[img]https://cimg6.ibsrv.net/gimg/www.doityourselft.com-vbulletin/900x1200/img_1842_0740ae4bc34774bfea91704bcad60c244796020e.jpeg[/img]
[color=#3d3d3d]Hi,[/color]
[color=#3d3d3d]WeilMclain Ultra 155 Boiler and 13 Honeywell Zone valve installed in my house. I have most of the nest thermostat (Learning and Nest E) and all of them are working fine without having extra C wire. Recently I replaced old non smart thermostat for my one of the zone with new NEST thermostat ([/color][url=https://forum.heatinghelp.com/home/leaving?allowTrusted=1&target=https%3A%2F%2Fstore.google.com%2Fproduct%2Fnest_thermostat%3Fhl%3Den-US%29]https://store.google.com/product/nest_thermostat?hl=en-US)[/url][color=#3d3d3d] and it is asking me to add C-Wire. Weird but true.[/color]
[color=#3d3d3d]For time being I decided to add C-Wire using external 24V adapter by running two wire from same room but it started complaining that it can damage my system so I removed them.[/color]
[color=#3d3d3d]Now I am thinking of buying one of the google power connector ([/color][url=https://forum.heatinghelp.com/home/leaving?allowTrusted=1&target=https%3A%2F%2Fstore.google.com%2Fproduct%2Fnest_power_connector%3Fhl%3Den-US%29]https://store.google.com/product/nest_power_connector?hl=en-US)[/url][color=#3d3d3d] and installing at Boiler level.[/color]
[color=#3d3d3d]Question is where do I wire this connector to ?[/color]
[color=#3d3d3d]-- I have 4 separate 120 to 24 V transformer with C and R output which are wired to provide power to Zone valves.[/color]
[color=#3d3d3d]-- My all thermostat has only two wires and I cannot send C wire power separately so it has to go using one of the two (Red and White) wire. If wire would have more than 2 wires, I can separately send C via third wire but it is not possible and I want to avoid re-running new wire.[/color]
[color=#3d3d3d]Do I wire my 24 power connector at Honeywell Zone valve ? If yes how wiring will look like ?[/color]
[color=#3d3d3d]note: I am very familiar with my system since i have installed this boiler by myself two years ago. I am not sure if I can add wire from my Ultra 155 which can provide this power.[/color]
01-03-22, 12:43 PM
