Best Of
Re: Discolored hot water / HTP PH 76-60 hot water heater installed 5 months ago
how did you test the chloride level, what is that number? What is the HTP limit?
Chlorine level tested with color strips?
hot_rod
Re: Hvac issue
Is this a HERS rated house? I've never heard of using an HRV as bath exhaust. They're either ducted to the living space, or ducted to the HVAC system. The normal practice is, if no HRV, then bath exhausts on timers to get the air exchanges. And this is one HRV serving three bathrooms, or each bathroom has its own HRV?
HVACNUT
Re: Lochinvar knight lockout
If the system is allowed to sit idle for a while, do the temperatures the system displays for Sensor 1 and Sensor 2 seem plausible (basically approaching ambient temps) ? If so I still think it's a water flow issue through the heat exchanger.
109A_5
Re: Copper Nickel brake line for Roth P/U Tube.
When you say "sleeve", you mean running the tubing through the top of the double tap bushing? With a compression adapter to lock it in place? Is there a 1/2" rigid pipe threaded to the underside of the bushing so the tubing is forced straight down, rather than curling?
That rigid pipe (L copper or galvanized) can be used as the pick-up tube itself. No need to sleeve through. Just put a flare adapter on the top side, and its a sealed connection. I did my Roth that way.
HVACNUT
Re: Air in oil lines - potential tank relocation
How did he determine 'pump wasn’t pulling enough'?
Re: How drain boiler for repair?
As you sure there isn't any water in the tube as you try to heat it. Even a trickle, fast drip will prevent the tube from getting hot all around.
Jam a few slice of Wonder 🍞 Bread up the tube to temporarily stop a small flow. That's why they call it Wonder bread.
hot_rod
Re: Mitsubishi MUZ-FH12NAH evaporator doesn't get cold
Check the valve on the mixed-phase ("liquid") line. It shouldn't be frosty, just wet with condensation when it's working. Something's restricted, the valve is the simplest answer.
After that, check the EEV. Make sure the coil is snapped down tight & plugged in. Maybe check the coil windings for continuity. Mitsubishi makes a magnet that'll drop over the EEV & allow you to manually stroke it. Once I found one that was sticking, I managed to free it up with the magnet.
ratio
Re: Help me calculate pressure drop!
The more a boiler, typical with oversized boilers, cycle , the lower the efficiency
So steady state or lab tested could show 82-84%, cycle efficiency could drag it down into the 70%
but that will always be the challenge with a non modulating boiler. 80% of the year it is oversized, even if it is spot in sizing for design day.
So a combustion analyzer showing burner efficiency is not telling all of the story.
My opinion is a mod con, even on a high temperature system will run in the mid 80s throughout its firing range. High 80 or 90 if it can condense part of the time.
hot_rod
Re: Mystery domestic water line
Our gym built in the 70's had a water service at each end.
Although there is a main valve on each end, there is also an outside curb stop which utilities will locate or have on a map. I would check with them first.
JUGHNE