Johnson Controls D-251-6002 Diaphragm 30067439-890 The 90-171 White-Rodgers includes a

The 90-171 White-Rodgers includes a protective dust cover to prevent debris accumulation on the contacts and an interchangeable mounting plate for versatile installation in any orientation

Simple Installation: Standard 7/8-inch duct cutout with an integral gasketed flange simplifies mounting on sheet metal ducts

Is the junction box required for installation

How do I wire the A19ABC-11 for heating vs

Johnson Controls D-251-6002 Diaphragm 30067439-890 The 90-171 White-Rodgers includes aFor field technicians maintaining legacy pneumatic systems, the Johnson Controls D 251 6002 Diaphragm is the primary replacement component for Number 2 pneumatic actuators. This replacement actuator diaphragm is engineered from a durable synthetic rubber compound, specifically designed to restore the pressure seal and stroke integrity of D 251 series damper actuators. In the field, a ruptured diaphragm leads to air bypass and failed damper