User manual HONEYWELL TB7980

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Manual abstract: user guide HONEYWELL TB7980

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[. . . ] See section 5. 5. Note: To configure the terminals, see section 4. TB6980/TB7980 62-0238 400-150-005-B 3/23/06 1/6 3. Typical Applications TB7980B TB6980B FIGURE 1: Damper control with electric reheat and auxiliary baseboard heating. 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. [. . . ] 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. thermal valve) 24 VAC pulsed (triac) / 10 min. thermal valve) 24 VAC pulsed (triac) / 15 min. cycle (e. g. , mechanical relay such as R841) 0-10 V pulsed / 1 sec. refresh (e. g. , SCR controlled device such as a re-heater) 0-10 V analog / max. refresh (e. g. , valve) 2-10 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. · The default mode is the active mode when the N. O. changeover contact is open (see section 5. 4. 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. 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. thermal valve) 24 VAC pulsed (triac) / 10 min. thermal valve) 24 VAC pulsed (triac) / 15 min. cycle (e. g. , mechanical relay such as R841) N. O. contact (The contact closes when Output 1 reaches or exceeds set percentage. [. . . ] 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. The NSB value is set via the configuration menu. Night Setback Override To temporarily override the NSB mode, press the Override button. [. . . ]

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