Best Of
Re: Rooftop AC pressures.
You’re still low on refrigerant, but the high side pressure should be much lower. Have you checked for a dirty condenser coil or a high side restriction like a clogged filter/drier? Restricted piston?
Ironman
Re: Stiebel Eltron heat pump water heater
Hi, What sort of anode rod does your unit have? Often with new tanks, I remove the anode, add teflon tape to the threads and reinstall it. This way, it will be much easier to service later on. I'd prefer to see a powered anode or a magnesium anode… not aluminum.
It's much easier to do this work before the tank is installed. 😉
Yours, Larry
Re: Melted Coil drain pan
I would also ask the owner if they are killing the furnace with the emergency switch instead of letting it run on the stat. That would kill the fan with a hot HX and no moving air which could melt it.
Long shot but worth asking.
Re: 3/8 pex lines for tiny zones
my concern about the small tubing is more that if some sludge gets in there for some reason it may plug up.
Re: Drywall/Fire Protection requirements over Boiler?
Yes, this old discussion was resurrected by a spam bot. We're going to close it to prevent confusion. Thanks.
Re: Viessmann Vitodens 100-W: Radial Fan Air Intake Port Deteriorating / Wearing
If you think the pipe is not draining cut a tee into the pipe inside the house before it goes out to the deck. Put the branch of the tee looking down (3/4" branch) let it drop down and make a trap with 3 elbows and a clean out tee. Run it to a drain with a neutralizer or pump it to a drain.
The trap only needs to be deep enough to hold the flue gas back.
Re: Cast iron radiator shipping
@pecmsg Shipping is on the invoice. It’s a done deal. They ship tomorrow.
Re: What am I missing here?
they had a pvc cutter posted for like $800 something dollars the other day that got shared on some other HVAC forum. I think they had a little pricing hiccup maybe?
Re: Melted Coil drain pan
An evaporator coil cannot sit directly on top of an oil fired furnace. It needs a minimum four inch spacer.
If it does have the spacer, check the furnace ratings for heat rise and max supply air temperature, then start testing. Also make sure its the correct firing by checking the nozzle and pump pressure.
HVACNUT
Re: Steam From Scratch
My brother talked to an old timer plumber that worked in NYC. In the old days they would travel on the Subway, and the plumber carried the toilet tank and the apprentice carried the toilet bowl……………………………..or maybe it was vice versa.


