How do I calibrate the differential on this pressure switch

The Copeland Comfort Control (White Rodgers) 37C72U-185 Gas Control Valve is a specialized water heater thermostat engineered specifically for liquid propane (LP) gas applications

While this is a shaded pole design

The foot mount design and color-coded wire leads—typically black (common)

preventing nuisance lockout codes caused by high-resistance connections or insulation breakdown

Eaton Cutler-Hammer C321KM30 Mechanical Interlock 326058-758 How do I calibrate theThe Eaton Cutler Hammer C321KM30 Mechanical Interlock is a critical field installable accessory designed for Freedom Series NEMA size 00, 0, 1, and 2 starters and contactors. Engineered for horizontal mounting configurations, this heavy duty mechanical link ensures positive electrical isolation by preventing two opposing contactors from closing simultaneously. This hardware is essential for reversing motor applications and multi source power transfers