White Rodgers 1F85-275 Specifications, Select Fast Second Stage on or OFF not available

5)Fast or Slow Cycle Selection – The factory default setting is fast cycle, which cycles 1st stage at approximately 1.2°F and 2nd stage 0.75°F. If you prefer slow cycle, press the

or key to change to SL. The 1st stage and 2nd stage would be 1.5°F and 1.2°F respectively.

6)Select Compressor Lockout CL OFF or ON – Selecting CL ON will cause the thermostat to wait 5 minutes before turning on the compressor if the heating and cooling system loses power. It will also wait 5 minutes minimum between cooling and heating cycles. This is intended to help protect the compressor from short cycling. Some newer compres- sors already have a time delay built in and do not require this feature. Your compressor manufacturer can tell you if the lockout feature is already present in their system. When the thermostat compressor time delay occurs it will flash the setpoint for about five minutes.

7)Select Backlight Display – The display backlight improves display contrast in low lighting conditions. When the C terminal is powered, selecting backlight CdL ON will turn the light on continuously. Select backlight OFF will keep the light on momentarily after any key is pressed. When the C terminal is not powered, this selection has no effect.

8)Select (Fast) Second Stage ON or OFF (not available in

Single Stage configuration) – In the run mode, if the setpoint temperature is manually raised by 3°F (2°C) or more above the actual temperature with the , and the fast second stage feature is enabled, FA ON, the second stage will energize immediately. With FA OFF, second stage will not energize until the setpoint temperature is 1°F or more above actual temperature for more than ten min- utes.

9)Select filter replacement run time – The thermostat will display FLTR after a set time of operation. This is a remind- er to change or clean your air filter. This time can be set from 0 to 1950 hours in 50 hour increments. A selection of 000 will cancel this feature. When “FLTR” is displayed, you can clear it by pressing HOLD and RUN at the same time. This resets the timer and starts counting the hours until the next filter change. Contact your system manufacturer for a specific replacement/maintenance interval.

10)Select Temperature Display Adjustment 4 LO to 4 HI – Allows you to adjust the room temperature display up to 4° higher or lower. Your thermostat was accurately calibrated at the factory but you have the option to change the display temperature to match your previous thermostat. The cur- rent or adjusted room temperature will be displayed on the left side of the display.

CONFIGURATION MENU

11)Select F° or C° Readout – Changes the display readout to Centigrade or Fahrenheit as required.

12)Selected Auto mode – This control will feature AUTO changeover mode when AU on is selected (default). Press the or keys in the menu mode to defeat the auto changeover mode (OFF).

13)Limited Heat Range – This feature provides a maximum setpoint temperature for heat. The default setting is 90°F. It can be changed between 62°F and 89°F by pressing the or key.

14)Limited Cool Range – This feature provides a minimum setpoint temperature for cool. The default setting is 45°F. It can be changed between 46°F and 82°F by pressing the or key.

15 & 16) Keypad Lockout – This menu selection will display lock icon () and “OFF” (default, keypad not locked out). The and are used to toggle the selection between OFF and ON (keypad locked out). When the keypad lockout selection is enabled (ON), and the SYSTEM button is pressed again, the display will indicate the number “0” (default, still disabled) in the time digits. The and are used to set the combination number from 0 to 999. If a combination of 0 is selected and the SYSTEM button is pressed, the menu will be exited and keypad will not be locked. If 1 to 999 is selected and the SYSTEM button is pressed, the combination is stored into memory and the menu is exited. The () will display designating keypad locked with a valid combination. The SYSTEM button will operate for 10 seconds after the menu mode is exited to allow the user to change the mode from OFF to the desired SYSTEM mode.

While the keypad is locked out, a simultaneous press of and will enter the configuration menu 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 button is pressed, the keypad is unlocked and the () is removed. If the unlock number does not match when the SYSTEM button is pressed, the 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.

SPECIFICATIONS

ELECTRICAL DATA

Electrical Rating:

Mv 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)

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 (non-condensing)

Shipping Temperature Range:

-40°F to 150°F

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