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Re: L8148E Aquastat Not Firing - No power from R to B1

Hello @homeowner1337,
It sounds like the Molex connector pin fitment is poor or a failed solder connections to the board.
A bit of disassembly, careful with the capillary tube and the bulb that goes into the well. The circuit board then comes out of the housing easily with the aquastat removed from the boiler.
Also while you are in there, a quite common failure is the solder joints at the at the relay go bad. They can be re-soldered and/or reinforced by cleaning off the old solder bending the pin(s) up enough to wrap a strand of thermostat wire securely around each pin and land it on the circuit board for about a 1/2 inch and solder it all. A fairly easy fix for an experienced DIYer with a soldering iron.

109A_5

1

Re: Where to Put main vent ?

Could be a puddle, but when you have plenty of Steam Available its going to blast in to the puddle & past it toward the point of lower pressure, the rad or main vent. Mad Dog 🐕

Mad Dog_2

1

Re: Injection tee spacing

Hot Rod. Your last drawings notes 4 x diameter, Interesting. Scrubbing is my piping slang 😁 as the injection flow is backwards to the building loop. I’m calling the boiler loop primary and the building loop secondary. Primary and secondary loops both have Grundfos pumps. Boiler pumps into a Calefi hydraulic separator.

Boiler pump should pump away from Hydro Sep . If you have a Hydro Sep why do you have CSTs ?

Rich_49

1

3/4 copper to male slip adapter

Working on the solar tank today. I needed a 10” brass nipple to make a clean connection

I drilled out a 3/4 adapter with a 7/8 holesaw, soldered it onto a piece of L copper

1-1/8 box fit perfectly

hot_rod

4

Re: Hot water boiler converted to steam, remaining return lines

Does it work properly? you should show us some pictures. I suspect someone bought the wrong boiler for a gravity hot water system and instead of converting the boiler or getting the right boiler tried to convert the system which almost certainly isn't going to work right unless they repipe the mains. You may have more work that you don't know about yet.

mattmia2

3

Re: Hot water boiler converted to steam, remaining return lines

Sure it wasn't originally a 2-pipe steam system?

Steamhead

3

Re: New boiler won’t heat house

If your contract says anything like "installed in accordance with the manufactures instructions", then your contractor is in breach of contract. He didn't follow the instructions.

Also, code requires that all materials be installed according to the manufacturers instructions. I have noticed that many contractors do not ever read the manufactures’ installation instructions, which is mind-boggling! Warranties may even depend on it (I’m referring to all materials, not just heating equipment.) I wonder whether it may be worth it to get a fresh set of eyes to come out and make the corrections and look over the entire install.

Ahomeowner

3

Re: Which pumps do you stock on your service trucks?

No, Johnny NY, but I have them in the shop. We know how brutal the streets of the 5 Boros are on expensive stuff in the back of the Vans. Mad Dog 🐕

Mad Dog_2

1

Re: Hydronic replace old boiler-gravity conv-2 pipe- Near Boiler piping and bypass?

I would order the dirtmag in npt and use adapters on the copper pipe because it is a very big chunk of brass and a little tricky to sweat and very expensive if you destroy it in the process.

mattmia2

1

Re: Gravity supply tank replacement

Also, if pilot has been on for years at a time, it has happened that the Tcouple will not function.
But you have to get the pilot lite to find this out.

JUGHNE

2