Bell & Gossett - SystemSyzer

This app is something I have all of my field personnel download onto their phone. Helps eliminate pipe sizing questions and provides basic pressure drop calculation assistance.

Depending on if you reset the values each time correctly this app will give you a completely wrong answer based on the printed charts. Also even when it does seem to calculate correctly, there is still some degree of discrepancy with the printed charts. It has been this way for years, and I finally decided it is time to stop using the app altogether for circuit setter balancing.

This app worked great until I updated my iPhone operating system to iOS version 14.5. I am waiting for the app web developer to fix the bug so I can once again use it.

I have been doing air and water balance for 26 years. Accuracy is critical if you are a water or air balance professional. We use meters that cost thousands of dollars each. I love innovation, when it actually works.... I would give this app negative stars if possible! I have exclusively used the hand wheel chart when balancing water flow on circuit setters. I saw this app about three years ago, downloaded it and was using it for a little bit. I noticed enormous discrepancies between the GPM’s that were reported on the app and the hand wheel chart. The original issue was, when the degree setting was set to zero, you would get a bogus GPM reading no matter what valve size you were using when you input a pressure differential. I contacted the B&G parts distribution company Dawson and informed them of the problem. Dawson responded wonderfully and contacted the software designer of the app and had the issue resolved. Dawson was so thankful that they sent me a free sweater. Good business. After using the app again, a new issue was discovered. This new issue is very serious and can cause the app to report a GPM reading that is completely different than what it actually is by an extreme amount. I contacted the Dawson company and reported the issue and this time the response was different, they did not seem that interested in trying to have the issue corrected. Not sure why they had a lack of concern. It is for this reason that I am not going to report what the actual issue is and I am doing this in hopes that somebody who actually cares will read this and reach out & contact me from either Dawson or the development group so it gets fixed. The app is a good idea, but it’s no more than that for now until things are fixed. Those of you that use the app can probably figure out what the bug in the software is yourself & I HIGHLY RECOMMEND THAT YOU DOUBLE CHECK YOUR GPM READING AGAINST THE WHEEL CHART FOR EVERY MEASUREMENT WHICH DEFEATS THE PURPOSE OF USING THE APP ALTOGETHER!!!!

Love this handy app! I am a NEBB BCP / TAB that works for a large mechanical contractor. I have used this app for years to communicate the GPM flushing requirements, troubleshoot issues with systems, and pre balance hydronic loops.

App needs work. Compared to other modern apps the interface is old slow and lacks sophistication. For example, fields must be reentered often, and auto populate with values that must be backspaces to removed.

After the recent update. Previous version device and current version device side by side give very different results.

The Reynolds Number does not appear to calculate correctly for "Other" liquid definitions with user input viscosity and SG. Otherwise, this is a useful rough estimating tool.

Circuit setter measurements not accurate

I find it really useful when calculating pressure drop on fluid other than 60F water.