Best Of
Re: Best nest thermostat-Experts recommendations to choose
@habib386 , I see that you asked about a thermostat and there are answers that did not quite answer the question that you actually asked. This can be irritating, as you have already decided that a thermostat will solve your problem. So I would tell you that the thermostat you want to use to lower your fuel usage will be a Honeywell. The name has changed to Resideo but the thermostats are the same.
Now… so you know, a thermostat can only turn on and turn off the fuel, based on the temperature set point you choose (or is chosen for you by the smart thermostat). The thermostat can not change your ductwork or your piping to radiators. If you have uneven heating as a result of a poor design or aging of the system, any thermostat you currently have, or decide to change to can not fix that problem. to make your house have even heat, you need to give more information because a duct system is adjusted differently that a radiator piping system. A steam piping system is adjusted differently that a hot water piping system.
The other suggestions are only suggestions based on your statement "i have been experiencing issues with uneven heating/cooling and it gets frustrating trying to manually adjust all the time". with this information, I can only guess that you have a single zone duct system in a two story home. This duct system may be poorly designed because the designer of the duct system tried to get cooling and heating to work in the same ducts and that is never easy.
If I am getting close to describing your system, perhaps I can help. Can you take some pictures of your heater and some of the heat outlets in each room?
Ed
Re: Need help with new install of radiant with Buderus cast iron boiler
You can’t run a slab at 120*, that’s too hot. You probably won’t need more than 100* SWT on the coldest night of the year. And you don’t need a buffer tank: the high mass of the slab is more than enough buffer.
Again, I would encourage you to read Tekmar’s essay on injection mixing. It will give the answers to your questions and also provide the info that you need but are not considering.
Ironman
Re: Need help with new install of radiant with Buderus cast iron boiler
Variable speed injection mixing is the best option. Go to Tekmar’s website and look up their essay on it for complete details.
On thing that you need to aware of is the slab over heating due to its high mass. It’s called the flywheel effect. VSIM will prevent this as well as protect the boiler from cool return water temperatures.
Ironman
Re: comms between LWCO and water feed?
Does suggest that the electronics are OK — except for the last bit which trips the LWCO. Unhappily, that relay also shuts the boiler off… so you don't have any LWCO control at all.
You need a new control.
Re: comms between LWCO and water feed?
As @mattmia2 stated it easily could be a failed solder joint, if the relay 'Fail-Safe' logic is structured that way. Failed solder joints at relays is common. It could be other things too.
109A_5
Re: comms between LWCO and water feed?
my bet is on solder joint to the relay and the relay is supposed to be energized when the level is ok.
mattmia2
Re: Old Broken Solenoid Valve
This may work, but upgrading to a more modern gas valve is probably the safer option.
https://www.supplyhouse.com/Honeywell-V8295A1024-3-4-NPT-Solenoid-Normally-Closed-Gas-Valve-2-psi-rated
109A_5
Re: Old Broken Solenoid Valve
What is the Make, Model number and Serial number of this unit. You will need a combination gas valve and perhaps also a 24 volt transformer. How about a picture of the pilot assembly? It looks like a complete recontrol kit. I am not sure how much you want to spend for parts plus labor. It may be better to think about applying what all that would cost plus labor and invest in a new system. If you have more questions call me at 401-437-0557 ask for Tim.
Re: Old Broken Solenoid Valve
McMaster Carr and Supply House.com both have a wide selection of these. You going to need to know voltage (probably 24 volt) Pipe size, BTU rating of boiler (input). Pressure drop would be good to know but you may not have that.
The old valve is a White Rogers, still in business. If you find the right supplier they can match that up.
Your problem will be finding someone willing to fix it.
Get ready for "You need a new boiler"
