the battery, then use a pencil or small screw- driver to move the switch to the ON position (see figure at right). Leave the battery out of the thermostat for at least two minutes, to allow the thermostat to reset itself. DO NOT MOVE OPTION SWITCHES #1 OR #2, as this may affect thermostat operation. [Op- tion switch #3 enables/disables keypad lock- out (see TOTAL KEYPAD LOCKOUT)]. Replace the battery, reprogram the thermo- stat, if necessary, put the thermostat back on the wall, and restore 24v AC power. To set the thermostat for automatic changeover
after programming, press | SYSTEM | to set the |
SWITCH |
thermostat to AUTO (the setpoint tempera- ture display is blank in the AUTO mode). The system will now automatically switch between heating and cooling, depending on the actual room temperature.
ON
1 2 3 4
Switch #1 set at installation (DO NOT CHANGE) Switch #2 set at installation (DO NOT CHANGE) Switch #3 (see TOTAL KEYPAD LOCKOUT)
Switch #4 ON
In the AUTO mode, the thermostat will not allow the temperature separation between the highest heat setting and the lowest cool setting to be less than 1°F. For example, if the highest heat setting is 75°F, the lowest cool setting cannot be below 77°F (see diagram below).
79
78COOLING TEMPERATURES
77
76DEAD BAND 1°F
75
74HEATING TEMPERATURES
13
