David J Nicholas
December 29, 2017

I have an in-floor heating system (Noritz on demand DHW and heating system) that has an autofill system to keep a constant pressure on the in-floor heating that uses a Caleffi 553 automatic filling valve. When installed by the plumber, he set the pressure to adjusting screw to 15 PSI and the adjusting knob to 12 psi which happens to be the minimum operating pressure the heating system. This seems to cause the system to shutdown as pressure seems to be at a minimum. For rotation of the adjusting knob, what direction does the knob need to be rotated to increase pressure on the gauge?

This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.