Setting Honeywell DU145 Auto Bypass Valve

[SafeGasInstall]

I don't balanced the by pass rad , ONLY if the ch system is really undersized even then this is my verry verry last opt. All I do is open fully lock shields and come back 1/4 turn on each one .
Lets go back to main object here , how do we balance a sh system that has a non A rated pump and has abp but abp lets by under normal operation even when is fully closed ?! I was thinking of this flow regulating valve but have never used one. Any one has fitted one ?

 

[happyflyer]

Hey guys,

It doesn't matter how you do it but at all times water must flow through the low water content heat exchanges on a gas boiler for lots of reasons, as long as the ABV lifts at the right time, it matters not, if its doesn't the boiler will kettle, scale up, trip and blah blah blah, I still think a lot of you leave the spring pressure low JUST TO MAKE SURE it's a comfort blanket. Maybe one day manufacturers will fit and electronic bypass valve which will monitor the pressure both sides of the valve, I commission these every day on commercial systems for pump auto change over.

Tony

If you weren't doing it right now, boilers would be bouncing off the wall. The Alpha 2 is part the way there to this, even if you match the pressure to the load you still ne to ensure there is water going around the boiler at the right rate.