The HTC-DIGITAL-LCD (ENDEAVOUR) is an update & replacement to our 2 previous models HTC-DIGITAL (& -TC). As per these models, this latest version is a fully programmable microprocessor based Temperature Controller with optional use of an internal 365 day Time Switch & / or Run Timer facility in the one model. The controller is intended for applications where On/Off control of Stages of Heating and Cooling and / or control of modulating actuators is required. Four of the five relays are programmable for their mode of operation (heat / cool or both) and characteristics, with the 5th relay dedicated as a System Run (fan/time switch) relay. Two Analogue 0-10vDC output signals can be programmed individually for start, range and mode of operation. Outside Air Temperature and Room (or R/A duct) CO2 sensors can also be optionally connected to override modulating economy cycle damper operation. Fresh air intake levels (Econ. Damper operation) due to high CO2 override can be set to a maximum damper output in extreme outside air temperatures so as not to loose temperature control on hot days.