For complete technical documentation, including specific parameter settings and underfloor heating applications, you can visit the Thermotech Documentation Center pid temperature controller - INSTRUCTION SHEET
: To allow the unit to automatically find the best "hot" control settings, press and hold the UP key for 6 seconds to start/stop the auto-tune process. thermotech tt91 manual hot
This unit is intended for indoor use only. Avoid areas with high vibration, flammable gases, or high humidity. Error Messages OPEn: Indicates a sensor break or open circuit. For complete technical documentation