As a Series 26 NEMA type controller

a common cause of sensor drift

heat-resistant silicone

Use a digital manometer to check the actual pressure at the tap

it cuts power to the motor to prevent gear damage and thermal overload

Resideo PV-020RP Top Assembly 322027-701 As a Series 26 NEMAThe Resideo PV 020RP Top Assembly is a high performance replacement vent head engineered specifically for PV Series SuperVent air eliminators. Designed for horizontal mount air vents, this 90 degree vent top features a precision engineered automatic float mechanism that effectively manages the continuous removal of microbubbles and gas pockets from hydronic heating and cooling systems. By facilitating consistent air elimination, this OEM component