How Much Water

KSKI3718

<span>I have a Weil McLain 678 boiler on a job with flooding problems. As part of troubleshooting I called the Mfr. for the amount of water in the operating range of the boiler, the tech I spoke with did not answer (or understand) the question.  Is there an accurate way to estimate the operating range water volume by dimensioning the boiler?</span>

<span>Thanks for your help.</span>

Long Beach Ed

Steaming Capacity

The manufacturer's data should show the steaming capacity. 



If it doesn't and you know the "lowest permissible water level,"  just drain the water out of it into a bucket from its normal operating level to the lowest level and measure the water in the bucket.



If you don't know either, I'd measure the water content, using the drain-it-and-measure-it method between a 3/4-full sight glass and 1-1/2" from the bottom of the sight glass. 



Ed in Long Beach

Rod

Flooding Problems

Hi-  What's causing the flooding problems?  Does it have an automatic water feeder? Does it have a domestic HW coil?

- Rod

KSKI3718

Thanks

Ed,

Thank you for the info.

Rod,

I think this has been a problem since the boiler was installed 15 years ago replacing 2 higher water content boilers but there is also a chance that clogged returns are contributing to the problem.  The feeder only went in 2 to 3 years ago.  before that a caretaker fed and drained the boiler as needed so it was not noticed.



 

crash2009

Page 31

I think page 31 might have the answer to your question.  http://www.weil-mclain.com/en/multimedia-library/pdf/weil-mclain-pdf/products/discontinued/discontinued-boilers/78-boiler/78manual.pdf

nicholas bonham-carter

the great flood

we had that problem, with luckily no auto/over-feed to cloud the issue. we had several horizontal pipes just above the normal waterline of the return which hid the water as the boiler built moderate pressure [pushing water into the returns]. when we cut them out, and dropped all the wet returns to the floor, the problem was solved.--nbc