White Rodgers 90 manual Features, Selectable Energy Management Recovery EMR

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FEATURES

CONFIGURATION MENU FEATURES Adjustable Temperature Display.

(User menu, Item 1) The room temperature display can be adjusted to read higher or lower by following the User menu and adjusting the tempera- ture to a higher or lower value. The thermostat is calibrated at the factory to display a very accurate room temperature, but due to various conditions and/or personal preference, you may wish to adjust the thermostat display higher or lower (up to 5°F). For example, if the thermostat displays a room temperature of 70° but you want it to display 73°, you can adjust it. To adjust, refer to the CONFIGU- RATION section (page 5, item 1).

Selectable Energy Management Recovery (EMR).

(User menu, Item 2) EMR causes the thermostat to start operating the system

early in order to make the building temperature reach your program setpoint at the time you specify. In multistage heating, the thermostat will start 8 minutes early for every 1°F difference between the room tempera- ture and the next programmed temperature. In cooling and heat pump applications, the thermostat uses 15 minutes per °F. For heating applica- tions in large buildings where extra time to reach the set temperature may be desired, EMR Long may be selected. When EMR ON L is selected in the user menu (page 5, item 2) the thermostat uses 15 minutes per °F.

EXAMPLE: If the temperature in the room is 65°F and the thermostat is programmed for 70°F at 7 AM, the thermostat will start approximately 40 minutes early. The difference between

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the room temperature (65°F) and the setpoint (70°F) is 5°. 5° X 8 minutes per °F = 40 minutes. The setpoint on the display will actually change to display 70° about 40 minutes early.

The maximum time the thermostat can start early in heating is 75 minutes (or 3 hours, 45 minutes if EMR ON L is selected). The maximum time in cooling and heat pump applications is 3 hours and 45 minutes. Cooling or heat pump applications start earlier because it takes longer to reach the desired temperature. This feature also minimizes the use of the auxiliary stages if conditions are such that the compressor stages are adequate to reach the desired setpoint.

To select or deselect this feature, refer to the CONFIGURATION section (page 5, item 2).

Features

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Contents Page Page Introduction Thermostat Buttons OrientationDisplay Configuration User Menu Keypad Lockout Menu access from User Menu Programmed Operation Planning Your Program ProgrammingEntering Your Program To Set the Clock To Set the DayFAN Sample Program Schedule Shows factory programming Personal Program Schedule Selectable Energy Management Recovery EMR FeaturesFahrenheit or Celsius Tempera- ture Display Outdoor Temperature SenseOne Shot Fan Control Beeper onFactory Preprogrammed Times and Temperatures Traditional Features Automatic ChangeoverActivate RUN PRG by Telephone Compressor Run Time and Auxiliary Run TimeProgrammable Fan Control Air Filter Change-Out IndicatorTemporary Program Override System and Thermostat Diag- nosticsOptional Remote Temperature Sense Programmable Vacation Time/ Temperature OperationIndefinite Program Hold Program View and ADV. to Large Lighted Liquid Crystal Display LCD Daylight Savings Time ButtonArm Chair Programming Thermostat Startup After Total Power Loss Index Features
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