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Re: ON/OFF switch for circulators. Allowable? Type to use?
If you trust everyone around to not turn it back on, sure. I'm not always so ...trusting. Probably a character flaw. 
A disconnect within sight is comforting.
ratio
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Re: ON/OFF switch for circulators. Allowable? Type to use?
...It would be nice to think so. 'tain't true. They will auto adapt, within a remarkably broad range -- but not indefinitely in either direction. Nothing would. With them -- or anything like them -- it is a very good idea indeed to try to come as close to the correct size as you can to begin with, and then let them fine tune.
I see that Grundfos now offers the Alpha2 line of circulators, which feature a so-called "AUTOADAPT mode, will automatically analyze the heating system, find the optimum setting, continue to adjust its operation to changes in demand." This seems like it would handle a problem of a pump being incorrectly sized for the system. ...
Re: Does anyone know why oil in the water
Nice pipe work in progress, Dan
Good to see nice welded pipe in those sizes now and again. I have a pair of 100+ BHP sectional steamers going in soon in that league and am looking forward to it.
The oil issue: The way I see it, the oil creates a surface film through which the steam must release itself. As steam breaks the surface, not only of the water but of the oil, you can imagine the turbulence of incompatible strata. The oil settles back into the void of the released steam bubble, some is trapped between the water and oil layer, even for a moment. Foam is created and holds other impurities which perpetuates the resistance to steam release.
I am sure there is more to it than that, and others probably have better explanations.
Good to see nice welded pipe in those sizes now and again. I have a pair of 100+ BHP sectional steamers going in soon in that league and am looking forward to it.
The oil issue: The way I see it, the oil creates a surface film through which the steam must release itself. As steam breaks the surface, not only of the water but of the oil, you can imagine the turbulence of incompatible strata. The oil settles back into the void of the released steam bubble, some is trapped between the water and oil layer, even for a moment. Foam is created and holds other impurities which perpetuates the resistance to steam release.
I am sure there is more to it than that, and others probably have better explanations.
Re: Can I upgrade to wifi thermostat with this aquastat?
It's not uncommon for the common side if the low voltage transformer to be connected to the case. A quick test would be to throw a multimeter between the stat terminals (one at a time) to ground, with the thermostat turned off. If you see 24vac between jusst one terminal and ground, that terminal is the hot and the ground can be used as a common for the stat.
ratio
0
Re: I built the wall...............after I knocked it down
So your 2" header doesn't even meet the minimum spec from WM. Using both risers doesn't allow you to downsize the header.
KC_Jones
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Re: Delta T pump, circ controlled zones, with a Prestige Excellence
could it be in the lag time of the sensors? Different types of thermistors respond differently. Here is a link to some good reading on sensor types and how they can be engineered to specific needs.It looks to me like those time constants are mostly about internal heating from current flow.
http://www.ussensor.com/technical-info/thermistor-terminology
How the thermistor is potted will make a difference, but I'm pretty sure a thermowell would solve most of the issues with inputs for the pump controller. Unfortunately, adding thermowells to an already crowded near-boiler pipe job is not always practical.
I'd still like some kind of configurable loop gain (even a low-medium-high would probably do it) to accommodate different system characteristics. An external speed input would still be best.
SWEI
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Re: Dayton 3UH62 furnace house blower not working.
Could you post more pictures:
Remove all the fan motor wires from the board so all the writing may be seen. Picture of that please, I am not familiar with that board so I need help.
Also a picture of the wiring diagram that shows the board connections.
Thanks
Remove all the fan motor wires from the board so all the writing may be seen. Picture of that please, I am not familiar with that board so I need help.
Also a picture of the wiring diagram that shows the board connections.
Thanks
JUGHNE
0
Re: Trouble filling hydronic system to second floor
1/2 PSI per foot of vertical system elevation above boiler, plus 5 PSI. Bottom fill, top vent (which you are doing). Adjust the pressure reducing valve to meet your elevation needs, typically 12 PSI for residential. May have a plugged strainer on the Pressure reducing valve.
Take pictures.
ME
Take pictures.
ME
Re: Sch. 40 pipe pitting off the equalizer after 4 months
Thanks @Fred. I'm going to check water quality. New fill this fall is as explained.
Curious thing is it is ONLY that one 3" nipple, at the dead end as the equalizer goes down to a tee, one side goes back into the boiler, and the other into that dead end 3" and a cap - pic 4 in 1st post. Cap is fine. That's why I'm wondering if it has to do with a combo of large weld ridge inside the length of the nipple and the swirling or vortex of flow from the feeder motor and equalizer. You know how copper line can pitt inside a water line if saulder runs through and into the pipe creating an obstruction inside the flow, and running water creates a small vortex around it that eats the tube from inside.
Curious thing is it is ONLY that one 3" nipple, at the dead end as the equalizer goes down to a tee, one side goes back into the boiler, and the other into that dead end 3" and a cap - pic 4 in 1st post. Cap is fine. That's why I'm wondering if it has to do with a combo of large weld ridge inside the length of the nipple and the swirling or vortex of flow from the feeder motor and equalizer. You know how copper line can pitt inside a water line if saulder runs through and into the pipe creating an obstruction inside the flow, and running water creates a small vortex around it that eats the tube from inside.
MilanD
0