Best Of
Re: Boiler Running Full Tilt, Cold House
I just went back to the job this morning. The domestic water meter is as steady as a rock.
I clocked the gas meter at 65 seconds to use ½ a cubic foot of gas with the boiler running at 100% with no other gas appliance being used other than the water heater pilot light. Tell me if I'm wrong, but my calculations show that 27,700 BTU were used by an 80,000 BTU boiler running at 100%. This is new territory for me as I've never had this happen. My first guess would be a bad gas valve.
Re: Licensed and Insured !
@Long Beach Ed Is this one you recently got called upon to service? You have my condolences.😔
Intplm.
Re: I Need 2 wire thermostat that also wirelessly controls a Taco RMB circulator.
Maybe something like this ? Wireless but no mention of WiFi, many other thermostats on that web site.
https://www.supplyhouse.com/Braeburn-7500-BlueLink-Universal-Wireless-Thermostat-Kit-3-Heat-2-Cool
Not sure if it has all the accessories you need or if it will correctly activate the RMB demand input without a relay.
I would suspect the zone(s) that the RMB serves that there are no other Zone valves and controllers, how many total circulators in the system ?
109A_5
Re: I Need 2 wire thermostat that also wirelessly controls a Taco RMB circulator.
Did it ever work right?
You say you want three stats, is that for a zoned AC system with radiant heat, or three mini split heads? Three heat-only radiant loops?
A Honeywell zone panel with a wireless adapter will likely do what you want; but the specific model numbers will vary depending on your equipment & actual needs.
ratio
Re: proper supply and return piping to my indirect
you can get 10 gpm through 1” copper M in a short length and stay under the 4 fps rule.
But you need at least 100,000 btu of boiler to make it worth flowing that gpm. What size is the boiler that will run the indirect?
hot_rod
Re: Heating & Cooling Calculations & Equipment
On the A/C side I advise Smaller is better. An Oversized system will never be proper 100% of the time, an undersized system will be only wrong maybe 1 or 2% of the time.
pecmsg
Re: Pressuretrol
It's probably fine. If it runs at .4 psi on a normal call for heat and the pressure rises during recovery from night setback this is completely normal.
You should leave the 3 psi gauge shut off anyhow unless you are checking the pressure.
The pressure control scale are usually inaccurate.
You can try and adjust it.
If you loosen the adjustment too far the inside mechanism may become disconnected
Re: Enough boiler ?
Gosh, if the system is working well, to your wants and needs, no need to make it more complicated.
Boost on most boiler would enable if the boiler is falling behind the load, while controlled by outdoor reset, boost allows the boiler swt to rise up a certain degree amount to try and help cover the load. On my Lochinvar Knight the boost increase is adjustable.
You would need a seriously large load for a normal operating system to want to go 20° over normal SWT.
If your ODR is set to 119, and for some odd reason you took 20 steps at 1° that would be 139° SWT.
Perhaps the over-head door is left open on a cold day? you might see the boost run all the way across the 20 steps?
Or if someone closes the garage door and the system catches up without needing to use the boost :)
At the flow rate you are running it would take a very long time to elevate that slab to 165 or any temperature that would shock it, remembering you have nearly 1/2 million lbs of concrete to work against.
I imagine it would catch the load and shut down way before you hit 165, or even 139 slab temperature.
hot_rod
Re: Oil Boiler Issues
And if you try to learn by watching YouTube, even some pros don't start by showing the reaming. They start with the flare tool.
There's an old saying that applies to many trades. Proper preparation prevents poor performance...
jesmed1