Mega-Boiler Down at Church! Diagnosing and Repairing Hydronic Boiler as an HVAC Tech In New York!
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- เผยแพร่เมื่อ 6 ก.พ. 2025
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It is really hard to fix something that isn’t broke😊 been there done that lots of times the only way we can figure out the problem is if they don’t fire it up till we get there to troubleshoot it nice troubleshooting I see a lot of Mike in you. Congratulations and that is meant to be a great comment to you and your boss❤
There should be a delay before the main valve opens. There’s almost no delay between the spark ignition and main gas opening.
great to see you back.
Nice job Daniel…always nice to see a problem when you arrive so you can trace it down and do the needed repair…
Appreciate that, sometimes it’s not so clear cut but we’ll figure it out!
Great Explanation, Daniel. Thanks for Posting again. Happy New Year to you and your family.👍🙏
Happy New Year to you and your family too!
Happy New Year Daniel.
You did a good job though troubleshooting
We have the identical unit at our church. We run into the same issue. Every 3 days it goes into lock out mode . About every 4 years We have changed out the flame sensor. It seemed have the right micro amps but it sloves our problem
Omg daniel did a video, about time lol.
There was no drip leg on those water heaters
I really enjoy your videos and approaches! Happy new year’s to you and your family! I’ve been a service tech for almost 30 years and still enjoy watching! For some reason I can’t stand watching your boss though I know you wouldn’t be where u are now without him so I’ll try and change my opinion. lol. Be safe out there!
Happy new years! Thank you
He is the reason I just bought my first home.
@@DCHVAC Your skill and dedication to the trade bought you that house. Congrats.
Happy New Year D
Happy New Year to you too!
Daniel I don’t understand how you diagnosed the main control but it is working.
Congratulations! That’s a strange system.
These boilers are common in NYC I work on these daily and they are configured in this way.. About the diagnosing ignition module gets power at the 24v terminal it has to continue from pv to pv/mv if it doesn’t your ignition module is bad
You measure flame sense in series with the sensing wire and the connection on the board
i knew you could do it, good job.
Thanks for watching!
Good Job Danile. Keep up the good work.
Appreciate that.
Danial how did you know to plug into the TH-W terminal and not the 24v like the other gray ignition mod
I’ve installed thus control before
Did the boiler come with a wiring schematic for you to trace out? I would have referenced that during the troubleshooting process. Good to see you posting again!
No schematic there for me to see
Its a Daniel Christmas present
Have you pulled the low water probe out and cleaned it?
@@Infowarrior-45no, it’s a hydronic system so it won’t get that dirty, plus the issue presented itself. It’s a 120v LWCO. It would shut down 24v power to the gas train, which is present. So that’s eliminated
ignition control to the right has its sensor wire directly grounded right? and the external pilot solenoid on the gas main seems to be constantly powered through the control making the control think that everything is okay?
@@williambreidenbach7255 control wasn’t giving power for the main valve
That's a Weil mclain boiler did someone retro fit that with those controls
Not sure in the history
whats the purpose of 2 gas vlaves?
@@swaterman08 I’m not sure the thought process of the original installers. Maybe redundancy incase one got stuck open. Idk
If one fails other shuts off gas
once you get over certain BTU'S you get this gas train for safety. Double block and Bleed
@@joelmcneney5366 I would think one would just be a solenoid N/C, or they would have a custom control that would have the connections for 2 valves.
@@joelmcneney5366no block and bleed. Just redundant valves. Installed for safety compliance.
I have never seen a constant pilot with an ignition module? Shouldn’t that pilot solenoid be wired to pv? So the intermittent spark can operate? So sequence should be th 24 volts call for heat pv gets power flame sensor allows main gas valve. I’m I wrong?
I agree. The church should have hired another service company a long time ago 😮. You cannot pay Mikey Pipes to spin his wheels- he’ll take you for a long long expensive ride.
No you're right I never seen a boiler with a standing pilot on electronic ignition all-in-one maybe someone retrofitted
Yeah you're right you should drop out your solenoid to your pilot off your control
This is a weird setup
I work with the WEIL MCLAIN LGB it doesn’t have a standing pilot the water heater he also worked on did but not the boiler it’s intermittent
What a cluster. You only use two ignition modules when they are cascaded due to a long burner row which needs two pilots to safely light the main burner. In that case the first module lights the first pilot. When it proves, instead of lighting the main burner, it completes the limit to the second ignition module - which requires its own pilot solenoid valve. When the second pilot is lit and proven, it then powers the two redundant main gas valves. Bottom line, if that boiler was designed to operate with just one pilot, get rid of the second ignition module.
To add to my comment, it sounded like you said that the low water cut off was cycled by the Aquastats? If the control power was cycled, you are asking for problems. If it’s wired in the 120V circuit, should be 1. Main Switch, 2. LWCO L1, jumpered to Common. N.O. wired to High Limit then to the Operator and then to the ignition module. Or wire the LWCO supply terminals right from the Power Switch and then wire the cutoff as dry contacts.
Also, where is the building’s thermostat or BMS wired? I like having it the last thing in the limit circuit to make troubleshooting easier. If you add a relay for this, use one with a Hand-Auto switch.
So given only one pilot, the second ignition module could have been used as the replacement of the first.
This would have cleaned up the controls wiring, made future repair issues easier to assess, and saved the customer the cost of a module. Do you agree?
@@marcinmerrimack1726 I really have no idea what they were thinking. I’d have to see the wiring diagramed.
Its also NOT a standing pilot. Its intermittent pilot just like a resi furnace.
Yeah, that’s not right! Out of his depth here
It’s standing whenever there’s a call for heat. Even when main burners are off at temp