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5

THERMOSTAT OVERVIEW

Before you begin using your thermostat, you should be familiar with its features, display and 

the location/operation of the thermostat buttons and switches. 

THERMOSTAT BUTTONS 

AND SWITCHES

THE DISPLAY

1.

) Fan Button

8.)

  Next (Menu button) is used to navigate within a menu

2

.) Hold a permanent temperature or 

press again to cancel hold (return to 

programmed schedule) 

9.)

  Set the correct time, access the schedule and customize 

thermostat settings

3

.)  System Button

10.)

 Back (Fan button) is used to navigate within a menu 

4

.) Backlight Button (located on the top 

of the thermostat)

11.) 

Exit (Hold/Run button) returns to the home screen

5

.)  Raises Temperature Setting

12.)

 Thermostat is protecting the equipment from short cycling 

(

5-

minute delay)

6

.) Access Menu Options

13.)

 Indicates that the system is running in Cool, Heat or Auxiliary 

mode. (Heat Pump Only -The auxiliary will run in Heat mode 

when the heat pump cannot maintain the set temperature.) 

7

.)  Lowers Temperature Setting

14.)

 SEE TROUBLESHOOTING

15.)

 Battery status indicator

 

16.) 

Replace battery indicator

17.) 

Day of the week used when programming a schedule 

18.)

 Permanent hold (bypassing the schedule)

19.)

 Temperature setpoint

20.)

 Appears when the keypad is locked (to prevent unwanted 

changes) 

USING THE THERMOSTAT

1

2

3

4

5

6

7

8

9

11

12

13

14

15

16 17

18 19

20

10

                     “

 

 

Replace

  

” appears in the display, new premium brand AA alkaline batteries 

should be installed. If the house will be unoccupied for an extended period and either “

 

 

” 

or “

 

 

Replace

 

” is displayed, install new batteries before leaving.

Whenever

6

USER MENU

To customize thermostat settings, press the Menu button from the home screen. Use the 

 or   buttons to highlight Settings and press Next. Use Next and Back to navigate 

through menu items. Press   or   to change the setting. 

User’s Menu #

(Press Menu button 

and release)

Description

Default Setting 

(flashing icons)

Settings

(Press   or  ) 

01

Schedule Type: set as either 

7

-Day, 

5-1-1

 Day or Non 

Programmable

5

7 – 7 

Day

5 – 5-1-1 

Day 

0

 – Non-Programmable 

02

Defines periods per day 

4

2 - leave, return

4 - wake, leave, return, sleep

03         

Early Start: starts heating 

or cooling early so your 

programmed temperature is 

reached by the programmed 

time

OFF

On – start early

OFF – start at program 

             period time 

04

Fahrenheit or Celsius 

°F

°F – Fahrenheit

°C – Celsius 

05

Temperature Display 

Adjustment: adjust the Room 

Temperature)

0

-5

 to 

+5

06         

Continuous Display Light:  

keep the backlight always on – 

“C” wire required

OFF

On – always on

OFF – momentarily 

07

Change Air Filter: set up a 

monthly reminder

OFF

to 

12

 – reminder time

                   (months)

OFF – no filter reminder 

08

Auto-Changeover: thermostat 

automatically switches between 

heat and cool

OFF

On - enable auto

OFF - disable auto

09

Keypad Lock: prevent unwant-

ed changes to the thermostat

OFF

On – disable buttons

OFF – all buttons are active 

THERMOSTAT OPERATION

Set Current Time and Day

Note: Time icons will flash at initial power up or after a reset.

1.)

 Press Menu 

2.)

  The time icon will be flashing. Press Next to advance and set the time

3.)

 Use   or   to set the correct time

4.)

 Press Next and use    or   to set the correct day

5.)

 Press Exit when finished. 

The default program is

 5-1-1 

Day, but can be setup as a

 7

-Day or Non-Programmable 

thermostat (refer to the User Menu above).
•   Hold Temperature (bypassing the schedule)  – With the System set to Heat or Cool

momentarily press the Hold/Run button. Hold will be displayed. Use   or   to adjust the 

temperature. The thermostat will hold the room temperature at the selected setting until 

you press Hold/Run again to start program operation (cancels permanent Hold).

•   Program Override (Temporary Hold)  – Press   or   until the desired temperature is 

displayed. The thermostat will override the schedule until the next programmed time 

period with a minimum override of 

2

 hours. Then the thermostat will automatically revert 

to the program. 

Summary of Contents for 1F85U-22PR

Page 1: ...alves Configurable as O or B ReversingValve or 3 wire zone heat power close Y 1st Stage Compressor conventional or heat pump G Fan Relay W E 1st Stage Heat conventional 1st Stage Auxiliary Heat heat pump Can operate as Emergency Heat only See Installer Menu 15 C Common wire for 24V optional with batteries L Heat Pump Malfunction Diagnostic terminal input signal requires common Y2 2nd Stage compres...

Page 2: ... system has a standing pilot be sure to light it 2 Press to adjust thermostat setting to 1 above room temperature The heating system should begin to operate and the thermostat will indicate Heat On 3 For heat pump with auxiliary Press to adjust thermostat setting to 3 above room temperature The auxiliary heat should begin to operate and the thermostat will indicate Heat On Aux 4 Press to adjust th...

Page 3: ...utton and release Description Default Setting flashing icons Settings Press or 01 ScheduleType set as either 7 Day 5 1 1 Day or Non Programmable 5 7 7 Day 5 5 1 1 Day 0 Non Programmable 02 Defines periods per day 4 2 leave return 4 wake leave return sleep 03 Early Start starts heating or cooling early so your programmed temperature is reached by the programmed time OFF On start early OFF start at ...

Page 4: ...or does not respond to key presses the thermostat should be reset by removing the batteries for 2 minutes This reset will not change the menu settings or program If the condition persists after reinstalling the batteries replace the thermostat To conveniently reset only the schedule and user settings back to factory defaults press Menu and Backlight buttons at the same time and hold until the disp...

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