ZB15KCE-PFV-591 models usually do not require a start assist kit for standard applications

and interlocking safety circuits

The unit includes an external sensitivity adjusting screw that allows for precise calibration of the flow switch actuation point without internal disassembly

The 88-106 MFD 250V specification is optimized to reduce electrical stress on windings during the inrush period

Resideo VR4300A4502 Valve THPU32HP7Y ZB15KCE-PFV-591 models usually do notThe Resideo VR4300A4502 is a robust 3 4 inch NPT dual automatic combination gas valve designed for 120 Vac standing pilot applications in high capacity atmospheric boilers and commercial furnaces. Built for reliability in demanding environments, this standard opening gas valve manages BTU capacities from 30,000 up to 300,000 BTU hr. It features a single stage design with a straight through flow pattern and a factory set 3. 5 inch water column outlet