Look for a bulging top

It is standard practice to turn the screw an additional 1/4 turn beyond the threshold to provide operational margin and prevent nuisance switching

Simplified Installation: Standard terminal labeling allows for rapid field replacement by qualified HVAC technicians

As an experienced HVAC technician

Is this valve compatible with refrigerants other than R134a

Johnson Controls R-3030-1 Reversing Relay Els PW 29614 Look for a bulging topThe Johnson Controls R 3030 1 Reversing Relay is a high performance pneumatic reversing relay engineered for precise signal inversion in complex HVAC control loops. Operating as a 1: 1 ratio inverter, this auxiliary device is essential for technicians needing to flip the output of a pneumatic controller from direct to reverse acting, or vice versa, without losing signal integrity. Its high capacity design features a 2000 Scim output flow capacity,