Honeywell TB6980 manual

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Table of contents for the manual

  • Page 1

    TB6980/TB7980 1/6 1. Introduction The TB6980/TB798 0 digital thermostats provide proportional plus integral individual space temperatu re control in zoned commercial HV AC systems such as hydronic and pressure de pendent V A V with or without reheat. There ar e four different models: Depending on the models, the thermostat can have up to three out-[...]

  • Page 2

    TB6980/TB7980 2/6 3. T ypical Applications FIGURE 1 : Damper control with electric reheat and auxil iary baseboard heating. FIGURE 3 : Damper control with automatic changeover , electric reheat and central cooling FIGURE 5 : Changeover and NSB inputs sharing the same 24-V ac transformer FIGURE 6 : Changeover and NSB inpu ts using different 24-V ac [...]

  • Page 3

    TB6980/TB7980 3/6 4. Configuration 4.1 Configuration Menus (See follow ing page s for explanations) TB7980A model Application (section 4.2) Default mode & Output 1 type (section 4.3.1) NSB value (section 5.6) Output 1 min. opening (section 4.3.2) Maximum setpoint (section 4.6) Minimum setpoint (section 4.6) 0 Internal sensor 0 Cool / 0-10V 1 2?[...]

  • Page 4

    TB6980/TB7980 4/6 4.2 Application T ypes The following table shows the different thermostat applications and their corresponding settin gs in the configuration menu. 4.3 Output 1 Output 1 is used to control a dam per . It controls he ating when the thermostat is in heat mode or cool ing when the thermostat is in cool mode. Set the following configu[...]

  • Page 5

    TB6980/TB7980 5/6 4.5 Output 3 (models TB6980 B and TB7980B) The following table shows the output types for Output 3 and their corresponding settings in the config uration menu. When any setting between 1 and 4 is sel ected, Output 3 controls heating only , regardless of the thermo stat’s mode. When setting 5 is selected, Output 3 co ntrols heati[...]

  • Page 6

    TB6980/TB7980 6/6 5.5.1 Automatic changeover In automati c changeover , the thermostat detects when the system switches between heat mode and c ool mode by comparing th e air supply temperature with the ambient te mperature. If the thermostat is in heat mode, it switches to cool mode when the air supply is cooler than ambient by 9°F (5°C) or more[...]