Honeywell TB7980B1005 Installation Guide - Page 1

TB6980/TB7980 1. Introduction Installation and User Guide ZonePRO Thermostats The TB6980/TB7980 digital thermostats provide proportional plus integral individual space temperature control in zoned commercial HVAC systems such as hydronic and pressure dependent VAV with or without reheat. There are four different models: • TB7980A (single output, modulating) • TB6980A (single output, floating) • TB7980B (multiple output modulating) • TB6980B (multiple output, floating) Depending on the models, the thermostat can have up to three outputs for the following applications:  Floating or Modulating damper/valve actuator control  Damper/valve actuator control with duct reheat and auxiliary heat (B models only)  Hydronic systems (room control, perimeter heating and cool- ing) Accessories  R841 family of electromechanical relays  T7770A3002 remote room sensor  50014156-002 remote room sensor  32004800-001 bare thermistor  50014157-001 duct temperature sensor 2. Installation Configuration and status display Cooling mode Temperature adjustment button Override button Heating mode Temperature display Output power display 2.1 Mounting Instructions 1. Remove the thermostat from its base by unscrewing the captive screw and tilting the bottom of the thermostat up. The screw cannot be completely removed. 2. Pass the wires through the center hole of the base and secure the base to the wall or onto an electrical box. 3. Wire the thermostat. See section 2.2 for terminal designations and section 3 for typical wiring diagrams. 4. Reinstall the thermostat onto its base and secure with the captive screw. 2.2 Terminal Designations The designations of the terminals vary according to the particular model of thermostat. Refer to the following table for the description of each terminal. TERMINAL DESCRIPTION 1 24 VAC 2 COM Power supply 3 AN1 4 COM TB7980 models Output 1 3 OPEN 4 CLOSED TB6980 models 5 6 T2/AN2 T2/COM Output 2 (TB6980B and TB7980B models) 7 T3 8 T3 Output 3 (TB6980B and TB7980B models) 9 COM External sensor input. (For applications requiring 10 SENSOR an external sensor, see section 4.2.) 9 COM Mode Changeover input (N.O. contact). See sec- 11 C-Over tion 5.5.2. 9 COM 12 NSB Night Setback activation input (N.O. contact). See section 5.6. Note: To configure the terminals, see section 4. TB6980/TB7980 1/6