Best Of
Re: Prevent mold in mini-split heads
Beside creating issues with humidity removal, oversizing will generally mean more crud on the coil. Crud builds up on the coil when the coil is allowed to dry out after running for a bit, this slowly bakes on the dirt which leads to blocked airflow and smelly coil.
I can directly see this with a couple of the mini splits I maintain. There is a set that are way oversized and the coil is always filthy. The right sized ones are pretty much spotless.
If you think about it this makes sense. If the coil is always running, there is generally condensate collecting and flowing down. This cleans the coil so dirt won't build up.
I have also noticed this effect on outdoor units. Because the heat pumps have a lot of condensation on the outdoor coil during the heating season, they stay pretty much clean.
So if you want a mold free unit, make sure to about right size. The typical rules of sqft/ton are always wrong.
Kaos
Re: Warm Start Boiler Summer Leak
I would guess not. Since this is a WTGO boiler it was equipped with a tankless coil, that would mean to offer DHW priority the circulator would stop pumping cold radiator water when the aquastat reached the low limit circulator cut out temperature. The boiler would always maintain 140° or more if the low limit was set at 160° with a 20° diff. No need for boiler protection in this case.
Now that the cold start boiler is an option, they may need to think about boiler protection with a bypass of some sort, or some reverse strap on aquastat that keeps the circulator from operating when the supply temperature is below say 150°. the circulator would cycle several times as a result, but it did that when it was operating for DHW anyway. So no big deal.
Re: ECM pumps interfering with each other
Each radiant pump is serving many loops. The fan coil pump is serving 3 fan coils. This is great information. Thank you.
Tomorrow is Install Day!
With the help of a few friends the SS liner will be installed tomorrow morning.
I shut down my coal stoker boiler as my coal supply was ended and removed the old flue pipe. Then vacuumed the remaining fly ash and cleaned the thimble.
Just for fun I stuck a mirror inside and got a view of a clear shot to the sky!
While we are up on the roof I will make a template up that will serve as a guide for a SS fluecap for all 3 flues. That will be a winter project !
Next will be to "unpipe" the old boiler and start the new install.
Re: 3 and 1 1/2 ton finally done
I can't wrap my head around the min height thing. We do it on gas furnaces just to follow the written word.
AC—-can't see how that can possibly matter
GW
Re: Summer shut down and 8 way treatment
yeah, we make our own demineralized water with a demineralizer unit that we hook up to city water. But the output of the demineralizer is like a ph of 5, so we use a chemical from Rhomar’s called ph boost to bring it back up.
Re: Lochinvar WBN080 lockout
I'm thinking you might want to check the flame signal when it is running, and see how it is. You also might want to check your exhaust system for any obstructions.
As a side note: If I went out on a job and did not know what I was doing, and didn't bring proper equipment, I would not charge for the call. But that's me, and probably why I didn't retire rich.
Rick
