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Re: Trying to understand wiring for heating system
Let's try again. You MUST use the X1/X2 terminals to control the gas valve on the boiler. That's a millivolt system, and must not be connected to anything else.
Re: American Standard Aqua Seal Faucet
Hi, As @hot_rod says, replace the seat. Also, a little teflon or dope on the seat threads will help insure no drips.
Yours, Larry
Re: American Standard Aqua Seal Faucet
It is always wise to replace the complete stems and the seats when you rebuild old faucets. Then every seal is new.
That is a nice design stem and seal, properly rebuilt it should work fine.
Home Depot has the kits also. Available without new handles.
hot_rod
Re: American Standard Aqua Seal Faucet
Where is it leaking? Is it dripping from the spout or is the packing/o-ring around the steam leaking? Anyone with a little experience should know where to get parts for it. Once the parts are replaced properly it should be good for another 5 years to couple decades depending on your water and usage.
mattmia2
Re: Trying to understand wiring for heating system
X1,X2 should make and break the millivolt circuit to the gas valve.
HVACNUT
Re: Trying to understand wiring for heating system
You need to list the components you have
Model of zone valve(s) and quantity
How many thermostats
Do you have an indirect water heater or tankless water heater (probably not the later) ?
quantity of circulators
24 volt gas valve or milivolt gas valve
number of transformers
and more pictures
Re: Trying to understand wiring for heating system
I would think the electrical control part of your system could be made to be more reliable than it is. IMO it should not be failing every few years.
From your pictures it does look like a milivolt system as far as the electrical control at the gas valve. The rest, thermostats and relay units are probably 24 VAC which is powered by the 120 VAC building power.
Millivolt systems are very sensitive to poor connections that create excessive voltage drop. So the wiring of the millivolt part should be set up to minimize unneeded connections.
I think it should work when connected correctly with minimal connections. I would think either the A-B contacts or the X1-X2 contacts would work, however the X1-X2 contacts are specified for low voltage and Powerpile (millivolt) service due to the isolation barrier (Red arrow) between high and low voltage part of the system. And also the contacts of that relay may be more suitable for Powerpile (millivolt) service. IMO the R8845U(s) should be as close to the gas valve as possible to minimize wiring losses.
More pictures of the rest of the electrical equipment would help, thermostats, relays, zone valves, wiring.
The Red Test button inside the R8845U may be helpful for isolating the defective part of the control system.
109A_5
Re: Trying to understand wiring for heating system
the output of the thermopile falls over the years too, it needs replacement every few decades. it is possible that the zone that works has shorter or heavier gauge wiring than the zone that doesn't
mattmia2
Re: Trying to understand wiring for heating system
The yellow wires on the zone valve are the motor, they open the valve when they get 24vac.
The red wires are the end switch on the zone valve. They are likely in parallel on the thermostat input of the circulator relay. The end switch closes the relay and the relay turns on the circulator and fires the boiler.
mattmia2