Honeywell TB7980B1005 Installation Guide - Page 4

4.2 Application Types The following table shows the different thermostat applications and their corresponding settings in the configuration menu. Menu setting Description 0 Internal sensor To control the ambient temperature using the internal (built-in) sensor 1 Room To control the ambient temperature using the 50014156-002 temperature sensor (the internal sensor is not used) 2 Air return To control the temperature at the air return using the 50014157-001 temperature sensor (the internal sensor is not used) 3 Air supply To control the temperature at the fresh air supply using the 50014157-001 temperature sensor (the internal sensor is not used) 4 Automatic changeover To control the ambient temperature using the internal sensor. The 50014157-001 temperature sensor is used for automatic changeover. See section 5.5.1. 5 Limited cooling To use the outdoor air for cooling whenever possible. The 50014157-001 temperature sensor is used to measure the outdoor air temperature. The internal temperature sensor measures the room temperature which is then compared with the setpoint. If the room temperature is lower than the setpoint, the air intake damper remains closed. If the room temperature is higher than the setpoint, the latter is then compared with the outdoor temperature. If the fresh air temperature is lower than the setpoint by more than 5°F(3°C), the damper opens to allow cool air in. 4.3 Output 1 Output 1 is used to control a damper. It controls heating when the thermostat is in heat mode or cooling when the thermostat is in cool mode. The following table shows the different default modes, the different output types for Output 1, and their corresponding settings in the configuration menu. Menu setting TB7980 models TB6980 models 0 Cool / 0-10 V analog Cool (max. of 10 min. refresh) (24 V tri-state floating) 1 Heat / 0-10 V analog Heat (max. of 10 min. refresh) (24 V tri-state floating) 2 Cool / 2-10 V analog (max. of 10 min. refresh) 3 Heat / 2-10 V analog (max. of 10 min. refresh) 4.3.2 Minimum Opening The minimum damper opening can be set between 0 and 50 %. Note: It is not recommended to set the minimum damper opening to 0 % (fully closed) when a duct heater is connected to Output 2 or 3. 4.3.3 Opening time (TB6980 models only) The damper opening time can be set between 80 and 160 seconds. 4.4 Output 2 (models TB6980B and TB7980B) Output 2 controls heating only, regardless of the thermostat's mode. When the thermostat is in heat mode, Output 2 is activated as soon as Output 1 reaches its full capacity. When the thermostat is in cool mode, Output 2 is activated when the measured temperature drops below the setpoint. The following table shows the output types for Output 2 and their corresponding settings in the configuration menu. Set the following configuration parameters: • Default mode • Output type (TB7980 models only) • Minimum opening • Opening time (TB6980 models only) 4.3.1 Default Mode / Output Type The default mode (heat/cool) is used for the following: • The default mode is the thermostat's mode at power-up. • The default mode is the active mode when the N.O. changeover contact is open (see section 5.5.2). • When configured as a contact (see section 4.5), Output 3 controls either heating or cooling depending on whether the default mode is set to heat or cool respectively. Menu setting 0 1 2 3 4 5 6 7 8 Description Not used 24 VAC pulsed (triac) / 1 sec. cycle 24 VAC pulsed (triac) / 10 min. cycle / direct action (e.g., N.C. thermal valve) 24 VAC pulsed (triac) / 10 min. cycle / reverse action (e.g., N.O. thermal valve) 24 VAC pulsed (triac) / 15 min. cycle (e.g., mechanical relay such as R841) 0-10 V pulsed / 1 sec. cycle 0-10 V analog / 1 sec. refresh (e.g., SCR controlled device such as a re-heater) 0-10 V analog / max. of 10 min. refresh (e.g., valve) 2-10 V analog / max. of 10 min. refresh (e.g., damper) Note: If 0-4 is selected, set the SW6 switch to Triac. If 5-8 is selected, set the switch to Analog (see section 4.7) TB6980/TB7980 4/6