12 & 13) Keypad Lockout – This menu selection will display lock icon. The 
and 
are used to toggle the function and display the lock icon and OFF (keypad not locked out, default) indicating in the time digits to the lock icon and ON (keypad locked out). When the keypad lockout function is enabled (ON), and the SYSTEM key is pressed again, the display will indicate the number 0 (default, still disabled) in the time digits. The 
and 
are used to set the combina- tion number from 0 to 999. "0" will not be a valid combination. If a combination of 0 is selected and the system key is pressed the menu will be exited and keypad lockout will not be evoked. If 1 to 999 is selected and the SYSTEM key is pressed again, the combination is locked into
CONFIGURATIONMENU
While the keypad is locked out, a simultaneous press of the temperature 
and 
will enter the menu item from any mode instead of only OFF mode. When the menu is entered with the keypad lockout feature enabled, the first menu item displayed is the combination code 0. The 
or 
keys are used to set the combination unlock number from 0 to 999. If the unlock number matches exactly with the combination lock number stored in memory when the SYSTEM key is pressed, the keypad is unlocked and the lock icon is removed. If the unlock number does not match when the SYSTEM key is pressed, menu is exited and the keypad remains disabled.
To reset the combination code and unlock the keypad if the code is forgotten, see troubleshooting section.
ELECTRICAL DATA
Electrical Rating:
20 to 30 VAC 50/60 Hz or DC
0.05 to 1.5 Amps (Load per terminal)
2.5 Amps Maximum Total Load (All terminals combined)
SPECIFICATIONS
THERMAL DATA
Setpoint Temperature Range:
45°F to 90°F (7°C to 32°C)
Operating Ambient Temperature Range:
32°F to 105°F
Operating Humidity Range:
0 to 90% RH
Shipping Temperature Range:
The system "mode" is selected by pressing the SYSTEM button. Icons on the bottom right corner of the display will indicate the mode: COOL (
), AUTO (
), HEAT (
), EMER, or OFF. In any mode except OFF, the setpoint temperature will be shown on the right side of the display. In OFF, this area will be blank. The current temperature will be displayed on the left side of the display.
To operate properly in the AUTO mode, the heat setpoint temperature cannot be the same as or higher than the cool setpoint temperature. The heat setpoint must be at least 1° lower than the cool setpoint.
Automatic System Changeover
When the thermostat is in the AUTO mode, both the Flame and Snowflake icons are displayed. The thermostat will call for heat or cool depending on the room temperature. The setpoint temperature displayed will be that of the last mode called. If the last system cycle was heat, the HEAT setpoint will be displayed. If the room temperature raises above the HEAT setpoint and the COOL setpoint and a call for cool is required, the temperature displayed will change to be the COOL setpoint.
OPERATION
Second Stage Time Delay
Your thermostat is designed to determine the optimum time to activate the second stage. Simply raising the temperature in heating or lowering it in cooling will not always force the thermostat to bring the second stage on quickly. There is a time delay from
EXAMPLE: For the last 2 hours the thermostat is set on 70° and the room temperature is 70° with the equipment using only the first stage of heat. Since the equipment is keeping the tempera- ture within 1 degree of setpoint, the thermostat will delay second stage for a longer time if you manually raise the temperature or if the room temperature quickly changes. Once the second stage comes on, it will come on sooner the next time there is a difference between the setpoint and the room temperature. The net effect of the staging program is that when the first stage is capable of making temperature the second stage will delay longer. When the thermostat calculates that first stage cannot make temperature in a reasonable time, the second stage will come on sooner. This built in function automatically optimizes the use of additional stages of heat or cool.
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