User manual HONEYWELL TB7980

[. . . ] TB7980B FIGURE 2: Damper control with electric reheat and auxiliary hot-water heating TB6980B FIGURE 3: Damper control with automatic changeover, electric reheat and central cooling TB7980B FIGURE 4: Temperature control of fresh air supply TB7980B CAUTION Do not connect common to ground CAUTION Do not connect common to ground FIGURE 5: Changeover and NSB inputs sharing the same 24-Vac transformer FIGURE 6: Changeover and NSB inputs using different 24-Vac transformers TB6980/TB7980 62-0238 400-150-005-B 3/23/06 2/6 4. Configuration 4. 1 Configuration Menus (See following pages for explanations) NOTE: Factory settings are inside the shaded cells. TB7980A model Remove the thermostat from its base and set the SW2 switch to MENU. The first digit flashes to indicate that the first item of the menu can now be modified. When the configuration is done, set the SW2 switch back to NORMAL. ABBREVIATIONS NSB - Night setback (number of degrees the thermostat will be set back upon receiving a setback signal) SSR - Solid state relay (used with fast cycling electric heaters, SSR's are a quiet alternative to electromechanical relays. [. . . ] 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 3°C (5. 4°F), the damper opens to allow cool air in. 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 0 1 2 3 TB7980 models Cool / 0-10 V analog (max. refresh) TB6980 models Cool (24 V tri-state floating) Heat (24 V tri-state floating) 2 Air return 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. 3 Air supply Automatic changeover 4 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. 5 Limited cooling 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 output types for Output 2 and their corresponding settings in the configuration menu. Menu setting 0 1 2 3 4 5 6 7 8 Description Not used 24 VAC pulsed (triac) / 1 sec. refresh (e. g. , SCR controlled device such as a re-heater) 0-10 V analog / max. refresh (e. g. , damper) 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. · 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. TB6980/TB7980 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) 62-0238 400-150-005-B 3/23/06 4/6 4. 5 Output 3 (models TB6980B and TB7980B) The following table shows the output types for Output 3 and their corresponding settings in the configuration menu. Menu setting 0 1 2 3 4 5 Description Not used 24 VAC pulsed (triac) / 1 sec. contact (The contact closes when Output 1 reaches or exceeds set percentage. See section 4. 1. ) 4. 7 DIP Switches Three switches at the back of the control module are used to select various options. To exit the diagnostic mode, press Override for 2 seconds or wait for 1 minute for the mode to exit automatically. 5. 4 Mode Changeover The thermostat can switch between heat mode and cool mode either via: · the automatic changeover · the changeover input 4. 6 Minimum and Maximum Setpoints The minimum and maximum setpoints are factory-set at 10°C (50°F) and 35°C (95°F). The maximum setpoint can be set between 35°C (95°F) and (minimum setpoint + 1). The minimum setpoint can be set between 10°C (50°F) and (maximum setpoint - 1). 5. 4. 1 Automatic changeover In automatic changeover, the thermostat detects when the system switches between heat mode and cool mode by comparing the air supply temperature with the ambient temperature. If the thermostat is in heat mode, it switches to cool mode when the air supply is cooler than ambient by 5°C (9°F) or more. If it is in cool mode, it switches to heat mode when the air supply is warmer than ambient by 5°C (9°F) or more. Note: Neither the heat mode icon ( ) nor cool mode icon ( ) appears when the thermostat is placed in automatic changeover. TB6980/TB7980 62-0238 400-150-005-B 3/23/06 5/6 5. 4. 2 Changeover Input The thermostat is in the default mode when the contact between terminals 9 and 11 is open and switches mode when the contact is closed. Note: The changeover contact state is ignored if the thermostat is configured in automatic changeover or in limited cooling. Mounting: - directly to drywall - single-gang NEMA standard 2-in x 4-in electrical box - double-gang NEMA standard electrical box with mounting plate 7. [. . . ] If you have any questions concerning this warranty, please write Honeywell Customer Relations, 1985 Douglas Dr, Golden Valley, MN 55422 or call 1-800-468-1502. In Canada, write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V4Z9. 5. 5 Night Setback The Night Setback (NSB) mode is activated when the contact between terminals 9 and 12 is closed. When the thermostat is in the NSB mode, indicated by the ECONO display, the temperature is lowered or raised by the set NSB value depending whether the thermostat is in heat mode or cool mode respectively. Night Setback Override To temporarily override the NSB mode, press the Override button. [. . . ]