Field Reversible: Engineered for easy reversible mounting to accommodate different damper rotation directions (CW/CCW)

Simplifies repairs by replacing superseded legacy part number D49766-82

technicians should typically calibrate the outlet pressure to 10

meeting the original factory specifications for system safety and operational reliability in commercial and residential hydronic applications

Johnson Controls T-4000-3139 Plastic Cover Field Reversible: Engineered for easyThe Johnson Controls T 4000 3139 is a professional grade horizontal pneumatic thermostat cover designed specifically for the T 4000 Series room thermostats. Engineered for demanding commercial environments, this white plastic cover provides a clean, uniform look for horizontal mounted controllers where a blank faceplate cover is required. As a genuine Johnson Controls replacement part, it ensures a precise fit for single or dual element sensing units