User manual HONEYWELL TB8220U

[. . . ] TB8220U Commercial Programmable Thermostat OWNER'S GUIDE 62-3071--2 CONTENTS Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main Screen Selections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Programming Heating and Cooling Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating the Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] When the thermostat is running the fan, the fan blade symbol appears next to FAN to indicate the thermostat has the fan on. NOTE: If the thermostat is not controlling the fan--typical for many gas, forced-air heating systems--the fan blade symbol will not appear even though the fan may be running. Manual Override of Fan Schedule AUTO--fan is automatically following the FAN schedule (choices are AUTO and ON). The fan is continuously on. 14 62-3071--2 Replacing Batteries Not all thermostat models require batteries. If the thermostat has batteries, a low battery warning flashes on the main screen for approximately 30 days. NOTES: -- If batteries are not replaced when the Low Battery warning is flashing, the LO batt screen displays continuously and the thermostat stops operating until batteries are replaced. The thermostat has a low battery indicator. However, it is M22755 recommended that you replace the batteries once each year. Do this to prevent leakage and prevent the thermostat and HVAC system from shutting down due to lack of thermostat battery power. -- 15 62-3071--2 Replace the batteries as follows: 1. Remove the thermostat from the base by pulling it straight out. Install three new AAA alkaline batteries with proper polarization. NOTES: -- -- Always use AAA alkaline batteries. All programming (Schedule, Date and Time) information is retained during battery replacement. WALL REMOVE DURING INSTALLATION M19919 16 62-3071--2 3. 4. Place the thermostat back on its base by aligning the terminal screw blocks with the pins on the back of the thermostat. Push the thermostat straight onto the base. BATTERIES (3) M19918 17 62-3071--2 Cleaning Thermostat Screen The thermostat has a touch screen interface. Follow these steps to clean the screen without making thermostat changes: 1. Thermostat locks out the keypad for 30 seconds to allow for cleaning. IMPORTANT Do not spray any liquid directly on the screen. If using household glass cleaner, spray cleaner on cloth. Then use the cloth wipe the screen clean. Use damp cloth slightly moistened with water or household glass cleaner to clean the screen. To unlock screen, see the Advanced Settings section. The screen continuously displays SCREEN LOCKED. PM SCHEDULE HOLIDAY CLOCK SCREEN OVERRIDE M22759 Partially Locked Screen When partially locked: -- Pressing a locked key prompts the screen to indicate SCREEN LOCKED for five to seven seconds. -- Pressing an unlocked key with SCREEN LOCKED active removes SCREEN LOCKED from the display. 21 62-3071--2 PARTIAL LOCKOUT 1 This mode locks all keys except HOLIDAY, OVERRIDE, and temperature Up/Down arrows: -- User can change the temperature setpoint, but cannot change schedule settings. [. . . ] Exit User Setup Press DONE to exit Advanced Settings and return to the main screen. 29 62-3071--2 Frequently Asked Questions and Answers Q: Some or all keys on the display do not work; why not?Q: Backlighting seems dim; is it designed to be dim?A: When using batteries for power, install fresh AAA alkaline batteries. Q: Thermostat is asking for heating or cooling to come on (screen shows "Heat On" or "Cool On" in display) but there is no heating or cooling running. [. . . ]