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

The WVFX 15 is rated for a maximum working pressure (PS) of 26

This hardware set is built to withstand the rigorous thermal demands of HVAC compressor hardware environments

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