公开(公告)号：US20180283733A1

公开(公告)日：2018-10-04

申请号：US15815103

申请日：2017-11-16

Applicant: FLUID HANDLING LLC.

Inventor： Pratik Naresh SHAH ,  Ronan STEPHENS ,  James J. GU

IPC: F24H9/20

Abstract: A switch assembly features an automatic switch and an electronic circuit board. The automatic switch has a common contact and a normally open switch contact to short when a boiler has sufficient water, and has the common contact and a normally closed switch contact to short when the boiler has a low water level. The electronic circuit board has a signal processor, a reset switch, and a low water status LED for providing a status indication of a low water condition that remains ON even if the water level has risen unless the reset switch is reset. The signal processor couples to the common contact, the normally closed switch contact and the normally open switch contact, senses signaling containing the status of the common contact, the normally closed switch contact and the normally open switch contact, provides corresponding signaling to turn ON the low water status LED when the water level is low, and responds to a reset switch signal and turn OFF the low water status LED.