Best Of
Re: Haier Mini Split
Multi split with weird operation is almost always a low refrigerant issue. Check this before doing any other troubleshooting.
Kaos
Re: Auto Feed Running when boiler is filled
Those MM LWCOs should be stripped down annually.
Probably a bad switch, but those are sold with the float, so $$$.
Re: Auto Feed Running when boiler is filled
Probably not the auto feeder if you tapped the low water cutoff. The low water cutoff needs to be taken apart and cleaned. The low water cutoff turns the water feeder on and off and the float is probably sticking. If you don't have it cleaned it could fail to shut the burner down in a low water condition ……and you do not want that.
You should have the LWCO serviced. In the meantime, keep water in the boiler by feeding it manually if you have a bypass piped around the water feeder. Can't tell by the pictures.
Keep your eye on the water level until you get it looked at.
The VTX feeders are better than the McDonnell Miller as @Jamie Hall mentioned.
Re: Auto Feed Running when boiler is filled
Theoretically the autofeeder can be taken apart and the little solenoid valve which is sticking on you repaired. Theoretically. In practice it's usually easier to simply replace it — nice new VXT complete with useful delays and volume controls and a flow meter…
Re: Vacuum Breaker One Pipe Steam
I bet not but yeah maybe. As I said, I've seen three basements with these "middle" returns in just the last couple months
If it's above the water line, it will have steam in it…
But only if there is a vent or trap after it and before it hits water, right?
Re: Slant/fin vsl-160 thermal insulator changeout?
The manual, at least the Peerless PC160 version I looked at has an exploded diagram and parts list, maybe that will help. Can you get the part ? No replacement part, I would not worry about taking it apart.
109A_5
Re: HTP Munchkin 926 0-10v control
I have that board, just purchased it for my project doing the same thing. Board had four resistors, two caps, and one transistor of some sort. The instructions say the unit can also be used for something called Boiler boosting. Six wires come out of the box. Two wires get plugged into empty slots on the boiler controller Molex connector. Two wires can be used for 0-10V boiler control or two wires for boiler boosting. I plan to use this board to get my Tekmar 403 controller communicating to my Munchkin via 0-10V tomorrow. Will almost be as good as my old Vision2 system that died earlier this year when done, I hope!
Re: Efficiency of an indirect water heater
I started this post for those looking to maximize the efficiency of dhw production
Specifically those with mod cons, solar or heat pumps looking to use the lowest possible temperatures. Although it applies to any and all heat sources
To that point a heat exchanger with two forced flows beats a coil or a tank in a pool of still water, ie a typical indirect, by a large margin in fact.
Idronics 29 explains the theory, application, sizing examples pretty pictures and more
Pretty simple basic observation. Food for thought for thought for those willing to learn. Which is most of the HH membership😀
Or as my heat transfer guru explains it
hot_rod
Re: Air in second floor loop
@jesmed1 may have the answer. If you are trying to push air down a vertical pipe you need some velocity. If the water flowing down the pipe is not flowing fast enough, then it will be like a water fall, just pouring over the edge of the top elbow, and allowing the air to float back up to the top. If however you force the water down the vertical pipe with some velocity then the air will be pushed along with the water and be forced out the open purge valve.
There is an ideal way to pipe a system to purge air and get the greatest amount of velocity without worrying about the relief valve popping open. I will explain it to you the way I learned about from The Great Dan Holohan God of Hydronics. (only using @doublekay term from above)
I used to teach this in my one day Hydronics seminar for EH-CC.org
Off Topic: Who is Alpha❤️? and why isn't it hanging up in a Mancave somewhere?
