Weil Mclain Ultra 155 leak
Hiren Patel
Comments
-
There may be a leak between the fresh water, and the indirect coil.
There should be a valve to close off the water entering the indirect. Close that off and see if the leak stops from the pressure relief valve. The only cure may be a replacement indirect tank.—NBC0 -
That looks like a manual bleed valve. If tightening it won't stop it from leaking, then replace it.Bob Boan
You can choose to do what you want, but you cannot choose the consequences.0 -
Thats the adapter for the temperature probe on the tridicator gauge.
The gauge has separate probes for temperature and pressure. Looks like the pressure side is bad as well.
Look in the manual for replacement parts and order a new gauge.
In the meantime you can remove the adapter and install a 3/8 black plug.
You need to drop the pressure first of course.0 -
Thank you all. I have ordered eplacement part and I will report back with results.
Thanks again.
HirenThank you,
Hiren Patel0 -
I replaced the valve and leak stopped. But boiler is locked out after few hours with maintenance required message displaying on panel. This unit never been serviced since last 6 to 8 years.
Thank you,
Hiren Patel0 -
First, do not throw away the probe adapter. You'll need it when the new part comes.
The maintenance reminder can be reset but it definitely needs to be done asap. Make sure they're familiar with the Ultra gas and to bring an Ultra maintenance kit so it can be cleaned properly.
The hight temp lockout is because there's no water moving through the boiler. Its probably air locked from the leak. There should be an automatic feed valve with a manual valve before that. Make sure the valve is open. You might need to purge through the boiler.
Post some pics from about 10 feet away if you can't get the water flowing and we'll try to walk you through it.0 -
Ok thank you. It makes sense.
I spoke with tech support and diagnose further with contractor menu. It found out that priority 1 is domestic indirect water heating tank and that circulator is scorching hot. Looks like that is shot.
Rep recommended to replace couple of circulator. One for DHW and another for primary loop.
I am going to replace both and let's see what happens, also i will purge as you suggested.
I will report it here.
Thank you for the guidance.
HirenThank you,
Hiren Patel0 -
-
Got it. Thank you for your advise.
HirenThank you,
Hiren Patel0 -
I purge the system and started up.
The strange thing is indirect tank was continuously making gargling noise during that purge. Somehow the pressure gage on the boiler unit wasn't showing any pressure reading. It was stuck at zero. That seems doubtful to me.
Thank you,
Hiren Patel
Thank you,
Hiren Patel0 -
You might need to purge all the loops.
I noticed the pressure was at zero. The tridicator has two leads. One for temperature and one for pressure. So the replacement you ordered will rectify that as well.0 -
Hiren, all of this seems new to you. You should really have a qualified service technician go over this system and get it running correctly. You're going to spend more money in stuff you don't need than if you just let someone set it up right one time, safely.Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
Consulting & Troubleshooting
Heating in NYC or NJ.
Classes5 -
Thank you all
System running well without any problem.
HirenThank you,
Hiren Patel0 -
Hi - sorry to revive an old thread but I had the same pressure sensor line break on my Ultra 155. I replaced the gauge with a new factory part and threaded in the new pressure sensor. I fired up the boiler by requesting domestic hot water and saw that the temperature gauge rise but the pressure sensor remained reading zero. Is there anything I need to do to get the pressure sensor seated and reading properly? it's not leaking at the sensor but the copper tube coming out of the sensor seems a little loose. Thanks!0
-
The capillary is loose around the sensor nut? Like you can wiggle it in and out? And it's not leaking?
Did you use tephlon tape or compound or both?
Try it again. Make sure there's no blockage in the bung, and only use a light coat of compound.
The tridicator with dual sensors has always been problematic. On the series 4 they switched to a standard tridicator that pipes in on the primary manifold.
0 -
The maintenance reminder came up because the control does not properly store the installation and last maintenance dates once powered down. Its a known issue. Just restore the dates and reset the maintenance reminder. If it has been 6 years or more, have it serviced.0
-
Hi, adding to this post because my Ultra 230 (installed 2015) just had the same problem. The pressure sensor line broke off where it attaches to the fitting in the manifold. Seems like a poor design continually exposing the plastic sensor line to hot temperature. I replaced the entire check valve with a 3/4" brass plug. The outer part of the check valve alone costs $70+. I see no need to make the original pressure gauge work again and risk another failure. A basic pressure gauge could be threaded into the outer part of the check valve. Thoughts?
0 -
They eliminated that on the Series 4. Now they supply a standard Tridicator gauge with a port in their Primary manifold.
Are you keeping up on the inhibitor? Aluminum block, so it's a must.
0 -
Glad they fixed that issue, and yes.
0
Categories
- All Categories
- 86.3K THE MAIN WALL
- 3.1K A-C, Heat Pumps & Refrigeration
- 53 Biomass
- 422 Carbon Monoxide Awareness
- 90 Chimneys & Flues
- 2K Domestic Hot Water
- 5.4K Gas Heating
- 99 Geothermal
- 156 Indoor-Air Quality
- 3.4K Oil Heating
- 63 Pipe Deterioration
- 916 Plumbing
- 6K Radiant Heating
- 381 Solar
- 14.9K Strictly Steam
- 3.3K Thermostats and Controls
- 53 Water Quality
- 41 Industry Classes
- 47 Job Opportunities
- 17 Recall Announcements