Best Of
Re: Is a small water heater an acceptable solution for extra heat on a heat pump system?
Does the HP have an electrical element for boost? I have the Vitocal and the indoor module has a resistance element built in for some boost. Although the program allows you to lock it out, which i did.
I do have a backup boiler and if the outdoor temperature drops the COP to 1 the control in the Vitocal calls on the boiler.
The output curves for the HP should show you the cross over point that makes sense.
hot_rod
Re: Can you please critique this boiler setup that was installed in my house two wks ago
5 section boiler calls for 2 2" risers or 1 3" riser. As others have mentioned its piped wrong but the fix is easy.
Remove the 2" riser that is between the building supply and the equalizer and cap the boiler and the tee.
Remove the other 2" riser and install a 3" riser. Easy to go back to the flange and make it a three elbow swing joint with 3 90s
Re: steam radiators
As Jamie has said the condensate has to leave/drain back to the boiler.
The new piping/reducers may have upset the mix and the two offending radiators are no longer sloped towards the riser to drain.
I would check them for level and if they are not tipped toward the mains to drain they need to be lifted on the vent side to create the drain back angle.
leonz
Re: The "equalizer" is mis-named. It does nothing to equalize anything.
OK well first you can't trust AI because it only takes from stuff it read from all sources on the internet.
why do you need an A/B difference equal to the steam pressure to put water back in the boiler?
You don't. The "A" dimension is complete myth. (To clarify, I believe the "A" dimension pertains to 1-pipe systems.)
Peerless themselves publish a diagram showing the A dimension and all the things that go into it, which I find to be completely mythological because I have seen that the waterline at the far end of the main never budges, regardless of pressure. This makes sense because the same pressure is delivered via the wet return and the main, and so nothing is going to move waterline-wise.
I did watch your video (I had watched it in the past as well—I love your polycarbonate drip) and I wonder if you ever measured it when the boiler wasn't running to see if it moved. In my experience, it won't. I also can't quite tell what is going on with the different piping in your system. If there are any openings to atmosphere or restrictions to steam flow (like a partially closed valve—I'm not talking about pipe resistance) that can definitely move it.
Here's my post from earlier in this thread that shows the peerless diagram and my video disputing what it shows:
Re: Low water cut out only works when burner is off
As a sanity test, instead of lowering the boiler's water level what happens if you just disconnect the probe ?
109A_5
Re: Lochinvar boiler isn’t keeping up
this indicates the boiler pump turns off on dhw call
If it is in zone mode a primary loop pump would also run
hot_rod
Re: Argo AR826 schematic?
May be time to replace the relay with a newer model that has the functions you want? Caleffi has great relay boxes👍🏻
I’m looking for a date on that Argo? Its possible that transformer was built 19th week of 1993 based on one number printed on it?
hot_rod
Re: Argo AR826 schematic?
Yes a thermostat or a Zone Valve end switch could be in parallel with the X-X Isolated Switch to control the boiler, however that just lets the Heat Zone circulator run forever, except for the DHW call.
I would think the the "Aquastat" and the "24 VAC Zone Valve" terminals would be contact closure required inputs, energizing the appropriate relay to energize the appropriate circulator. With either 'input' activated it would close the X-X Isolated Switch to control the boiler.
However in this case the "24 VAC Zone Valve" terminals are not used so that theory may be incorrect since the Heat Zone circulator is apparently energized 100% of the time. Unless of course the intent of this AR826 is just to provide DHW priority and not actual zone heat control and the Heat Zone circulator should be switched by some other thermostaticly controlled device.
Like to reverse engineer this box, its pretty simple, probably never have the opportunity.
More pictures of the whole system may help.
Found this in the other thread posted above. Interesting the image states DO NOT USE for the "24 VAC Zone Valve" terminals.
109A_5
Re: Argo AR826 schematic?
I looked online and couldn't find anything on that relay.
I suspect it was to be used with zone valve where the t stat wires go to the valve and the end switch wire would go to "isolated end switch" Don't know if that is how it is hooked up.