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A Salute to all of our Veterans

Thank you for your dedication, sacrifice and service. Mad Dog

Mad Dog_2

9

Re: Cross over heat transfer

HomerJS... OMG! you asked if Z3 mix was installed backwards and I said no, but was just down looking at what it would take to implement the changes to the new proposal and noticed that indeed Z3 mix valves is upside-down. Cold to Hot and Hot to Cold...

Gonna have to straighten out tomorrow and see result... i had leaks with the original Taco mixers and a few of the shutoff & had a service guy replace the bad ones last heating season. I guess that must be when that happened...

.

Wfrcrownbwf

1

Re: Modulating low pressure steam…

Look to the Dwyer 1823 series of low pressure switches. You can easily wire one of these into a timer relay module so that when the desired max pressure is hit, it shuts down the boiler for a time specified by you.

Mine is set up to trigger at about 8 inches of water column to shut down for 10 minutes

I get all my Dwyer stuff from ebay because it's very cheap and so well-built that used or open-box is fine:

https://www.ebay.com/itm/166987060059?_skw=dwyer+low+pressure+switch+1823-10&itmmeta=01K9QHGJ0C5Y7JNBWA5BHGW9XH&hash=item26e134535b:g:cf8AAOSwNgNm8ZQ7&itmprp=enc%3AAQAKAAABAFkggFvd1GGDu0w3yXCmi1ezKtlLNsDf84FRAuLFmD%2B%2FQeDbuEcRJYQBX7FvqMJOMFu%2BOQ7K8%2FQOFB8WVUXXw1AcEnHSZtKmsCaE5PkxMrFNABeGuTitEXxwyiVFpKrNGZL2%2FxNVtHXcngqkbbsMMFQkVD8Tc6yAcYpjjv4zomzQg772tXpsPZRPqO1S%2FWv6icaOTyQzB%2FuKJpb%2F3vhAf2aJoKLqJJPI7qep0aMnOpWachfFqK%2BM0pAG%2FLdih%2FfMbu%2BYIgBX8u4wH6SgSuT6NSrQg2BLieP3%2Bp%2BS2ymDHb7ODC6Kd9ybTIuB3SgUO7To5jtm%2F1IN5b%2BMWR%2Ftf9kU6sM%3D%7Ctkp%3ABFBMrKDC8c1m

https://www.amazon.com/Multifunction-AC-24-240V-Function-Electronic/dp/B0DZ2DKPN2/

ethicalpaul

1

Re: 2 Pipe Steam Boiler Pressure Reading 8psi

site glass pig tail etc

simon_skove

1

Re: Help selecting a bypass valve for new towel warmer with TRV

In case someone finds this later and is curious, I did end up plumbing it in parallel and plumbing in a regular globe valve on both legs to allow for manual adjustment once, presumably in a couple weeks.

iconoclasthero

1

Re: A2W heat pump as primer for 4 bank hydrothermo ( 864,000 btu )

With a return of 127.2F the water coming out of the heat pumps is going to have to be 137F or so. That's awfully hot for a heat pump, the COP is going to be disappointing. Which means you probably won't save any money.

DCContrarian

1

Re: OLD B & G COMPRESSION TANK SIZING..DO I NEED A NEW TANK?

These tanks work just fine. Maintenance is minimal -- but what I don't see on yours is any sort of gauge glass to check the air/water level in the tank. In principle, the Airtrol is supposed to do that. The only thing that can really go wrong with them is they can get waterlogged -- lose the air cushion -- and the solution is simple enough: close the valve to the rest of the system, open a tank drain, close the drain, and open it to the system.

In theory the Airtrol has a little valve on the bottom which you can open. If water comes out, let it drain (patience) and close it right away when air starts to come out. That should set the proper level in the tank. It's a good check.

One caution: do not put an air separator such as you would have with a modern expansion tank on the system. The compression tank depends on trapping the air in the system to work.

Jamie Hall

1

Re: OLD B & G COMPRESSION TANK SIZING..DO I NEED A NEW TANK?

Hello ww,

If you have a steel compression tank between the ceiling joists in the basement you do not have steam heat. do you know where the circulators are that push hot water from the boiler to the radiators???? We need pictures of them too.

What you have a steel compression tank not an expansion tank and it is a very reliable way to provide the point of no pressure change in your system.

The only time a steel compression tank goes bad is when a weld ruptures or the tank rusts out at a weld.

I have the same tank but a newer vintag with an airtrol valve, and gauge glass and an Internal Air Separator to feed any airbubbles into it.

With my coal stoker using the steel compression tank I run summer temperatures of 140 low 160 high with a 190 dump zone temperature.

If you want a reliable triple gauge you should purchase a Marsh Instruments triple gauge as it is built by them, tested and certified by marsh industries and they offer a 2 year guarantee on the gauge and they can be easily calibrated by the lay person. I have had my fill of chinese gauges and will not buy them; BUT i would not hesitate to purchase pressure gauges from Taiwan, those I would buy in a heartbeat.

When you have time would you be so kind as to provide us with many images of the near boiler plumbing as possible being the water feed valve, pressure relief valve. back flow preventer, piping leading to the steel compression tank and the pipe runs from the boiler to the ends of the basement plumbing.

The more pictures you can upload the faster one of us can help you.

Do not lose hope, you can keep the tank in the ceiling you just need to do some work.

leonz

1

Re: Radiant heating resetting itself

look at the power supply to the controllers. that is kind of the classic symptom of a failed switching power supply, it can supply enough steady state current but it can't supply enough current at start up because the capacitor has failed. Either there is one central supply that is bad or the supply in all of them failed last year and when you powered them off and tried to power them back on this fall they couldn't supply the startup current.