Common Questions for HVACR Technicians What is the maximum proof pressure for the E1H-H15

Resideo S8701A1122 is a direct spark ignition (DSI) module designed for gas-fired HVAC systems including furnaces

Enhanced Reliability: Resolves common hot water heater burner issues such as ignition delays

5 Cv flow capacity ensures high-volume fluid handling for industrial scale operations

Common Questions Is this kit compatible with Ultra Series 3 or 4 boilers

Crandall Stats & Sensors 2390-501-CSS Switch 318820-201 Common Questions for HVACR TechniciansThe Crandall Stats & Sensors 2390 501 CSS is a pneumatic gradual switch designed for 100% manual adjustment of air pressure within HVAC pneumatic systems. This unit provides precise control over a 0 to 20 psig range, allowing technicians to manually select and maintain specific pressure settings for pneumatic actuators, position controlled devices, or remote set point adjusters. As a 2390 501 CSS replacement for YMC 1001, it serves as a direct drop in