Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Trickle Flow through Noritz NRCB199DV

AmosCall
AmosCall Member Posts: 1
in Gas Heating
I am working on an installation for a NRCB199DV boiler.
When I connect the water hose to my system to fill/ bleed out air, I get decent flow, but only when I bypass the boiler. When I run the same setup through the boiler it slows down to a trickle.

I occasionally get error code 54, or the system will heat up but water will not push through. I have 2 zones fed by Grudfos pumps which are running, and the system is calling for heat from the boiler.

When The boiler is first turned on I get a good flow as the system goes through it's start-up routine, but then stops.

Any thoughts on why the boiler is the bottleneck here?

Comments

  • GGross
    GGross Member Posts: 1,397
    Looks like a combi. Perhaps a diverting valve is in the wrong positions when you are trying to purge?

Categories