Best Of
Re: Gas boiler heating house without call for heat
@EdTheHeaterMan posted the 'CR' bypass back on page 2 when we started to have a discussion about that method. Color image with B&W image in the Lower Left corner and his annotations as what to change. At this point I'd put the replacement relay in as proof that it all works as expected. You can always change it later if you want to.
109A_5
Re: Cast iron boiler replacement with Navien High Efficiency Condensing Boiler NFB 200H
EEEK. Is that poor boiler really sitting in a pit? Asking for trouble.
Step 1. Make sure you have the sizing right. Mod/cons are wonderful gadgets, but they do need to be sized correctly for the load. So… a building heat loss is in order.
I'm curious. Why two pumps in series like that? That makes no sense at all. You are going to be running primary/secondary, I hope, so two pumps will be needed — but not in series as you suggest.
Re: Cast iron boiler replacement with Navien High Efficiency Condensing Boiler NFB 200H
how many zones ? Is it easy to vent to outside ?
Snowmelt
Re: Cast iron boiler replacement with Navien High Efficiency Condensing Boiler NFB 200H
the boiler you have is a 135,000, 107,000 output. If that has been been adequate, why are you considering a 200?
hot_rod
Re: New Century House with Two Pipe Steam - Questions
That's called a "lock-shield" valve. And the part you're holding in the pic is the key.
Re: Draft inducer motor for gas boiler
We all first tried just replacing the motor , learn from our mistakes .. :)
Big Ed_4
Re: Wirsbo Manifold Pin Valves
Those valves should also have the indicator pin centered over the green dot when they are powered down. You loosen or tighten the mounting ring to adjust them.
I can't believe they are not all broken yet.
Rick
Re: Gas boiler heating house without call for heat
Either way should work, although having relays in series is just more stuff to fail. However it keeps the boiler wiring consistent with the OEM drawings.
109A_5
Re: Gas boiler heating house without call for heat
With all the detective work you guys have done on my behalf, I kinda feel like I've let you down ordering a replacement part 😂
Re: Gas boiler heating house without call for heat
You need to know your meter…. on my digital meter 000.0 ohms means no resistance. Closed circuit. For an open circuit my meter would read OL which was translated from the infinity symbol (∞) on the old analogue meters in the original instruction manuals. But that was back in the day when old farts were converting from analogue Simpson multi meters to Digital stuff and they thought we needed to be told that ∞ = OL.
