TAC 228R/228RL Room Temperature Controller Manual

This document describes the TAC 228R and TAC 228RL room temperature controllers, which feature a built-in radiant heat-compensated sensor and a 2–10 V DC analog output for controlling heating/cooling valves, VAV systems, or damper actuators. It details the controller's PI control action, SPC (Setpoint Control) function for remote setpoint adjustment, and technical specifications including supply voltage, ambient limits, and mounting instructions.