EMERSON 1F85U-22PR Programmable Thermostat Installation and Operating Instructions
- October 30, 2023
- Emerson
Table of Contents
EMERSON 1F85U-22PR Programmable Thermostat
View all EMERSON thermostat manual
INDEX
| Thermostat Installation | 2-4 |
|---|---|
| Wiring | 2 |
| Installer Menu | 3-4 |
| Using the Thermostat | 5-7 |
| Thermostat Overview | 5 |
| User Menu | 6 |
| Thermostat Operation | 6 |
| Thermostat Schedule | 7 |
| Troubleshooting | 7-8 |
| Homeowner Help Line | 8 |
| Thermostat Applications | Maximum Stages Heat/Cool |
| --- | --- |
Conventional Gas, Oil, Electric (mV and
24V), Heat Only, Cool Only, or Heat/
Cool Systems| 1/1
Heat Pump (air source or geothermal)
with no Aux. Heat| 1/1
MERCURY NOTICE: This product does not contain mercury. However, this product may replace a product that contains mercury. Mercury and products containing mercury must not be discarded in household trash. Refer to www .thermostat-recycle.org for information on disposing of products containing mercury.
SPECIFICATIONS
Electrical Rating:
- Battery Power ………………………………. mV to 30 VAC, NEC Class II, 50/60 Hz
- Input-Hardwire ……………………………… 20 to 30 VAC, NEC Class II, 50/60 Hz
- Terminal Load …………………………………… 1.0 A per terminal, 1.5A maximum all terminals combined
- Setpoint Range …………………………………. 45° to 99° F (7° to 37° C)
Rated Differentials: Fast Med Slow
- Heat (@ 6°F/ Hr) ……………………………. 0.5°F 0.75°F 1.9°F
- Cool (@ 6°F/ Hr) ……………………………. 0.9°F 1.2°F 1.7°F
- Operating Ambient ……………………………. 32°F to +105°F (0° to +41°C)
- Display Temperature Range ………………….. 32°F to +99°F (0 to 37°C)
- Operating Humidity …………………………… 90% non-condensing max
- Shipping Temperature Range ………………. -20°F to + 150°F (-29° to +65°C)
- Thermostat Dimensions ……………………… 3-3/4” H x 6” W x 1-1/8” D
THERMOSTAT INSTALLATION
WIRING
Refer to equipment manufacturer’s instructions for specific system wiring
information. After wiring, see INSTALLER MENU for proper thermostat
configuration. The wiring table shown is for typical systems and describes the
thermostat terminal functions.
| Terminal Designations | Terminal Function |
|---|---|
| RC | Power (24V) – Cooling |
| RH | Power (24V) – Heating |
| O/B6 (not shown) – 3 wire zone valve | Reversing Valve or output for 3 wire |
zone valves Configurable as “O” or “B” Reversing Valve 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 compressor (conventional only)
W2| 2nd Stage Heat (Conventional)Can operate as 1st Stage Auxiliary Heat (See
Installer Menu #15)
Precautions
- Do not exceed the specification ratings.
- All wiring must conform to local and national electrical codes and ordinances.
- This control is a precision instrument and should be handled carefully. Rough handling or distorting components could cause the control to malfunction.
WARNING
Do not use on circuits exceeding specified voltage. Higher voltage will damage
control and could
cause shock or fire hazard.
Do not short out terminals on gas valve or primary control to test. Short or
incorrect wiring will burn
out the thermostat and could cause personal injury and/or property damage.
CAUTION
To prevent electrical shock and/or equipment damage, disconnect electrical
power to the system, at main fuse or circuit breaker box, until installation
is complete.
INSTALLER MENU
To prevent changes that may affect system performance, this thermostat has an INSTALLER’S MENU and a USER MENU. The INSTALLER’S MENU provides access to every option, while the USER MENU provides access to items that will not affect system performance. To access the INSTALLER’S MENU press the Menu button for 8 seconds. The display will show item 30 in the table below. Use Next and Back to navigate through menu items. Press or change a menu setting.
TEST EQUIPMENT
Turn on power to the system.
-
Fan Operation
If your system does not have a G terminal connection, skip to Heating System.- Move fan switch to On position. The blower should begin to operate.
- Move fan switch to the Auto position. The blower should stop immediately.
-
Heating System
- Move System Switch to Heat position.
- Press to adjust thermostat setting to 1° above room temperature. The system should begin to operate and the thermostat will indicate Heat On.
- Press to adjust the thermostat setting 1° below room temperature. The heating system should stop operating and the thermostat should indicate Heat.
-
Auxiliary System ( only for heat pumps with auxiliary)
- Press the System button to select the Aux position.
- Press to adjusts thermostat setting to 1° above room temperature. The auxiliary heating system should begin to operate and the thermostat will indicate Heat On Aux.
- Press to adjust thermostat setting 1° below room temperature. The auxiliary heating system should stop operating and the Heat On Aux icon will disappear.
-
Cooling System
- Move System Switch to Cool position.
- Press to adjust the thermostat setting 1° below room temperature. The blower should come on immediately at high speed, followed by cold air circulation. The thermostat will indicate Cool On. There can be up to a 5-minute delay. (see INSTALLER MENU, item 50)
- Press to adjust thermostat setting to 1° above room temperature. The cooling system should stop operating and the thermostat will indicate Cool.
USING THE THERMOSTAT
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)
- Whenever 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, nstall new batteries before leaving.
USER MENU
To customize thermostat settings, press the Menu button from the home screen. Use the Next button to advance 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, return4 – 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| Fan Circulation Mode: Turns blower on for present time period
when equipment has not cycled (on) for 1 hour| OFF| 10 minutes to 100
minutes in 5
minute increments
05| Continuous Display Light: keep the backlight always on – “C”
wire required| OFF| On – always on OFF – momentarily
06| Change Air Filter: set up a monthly reminder| OFF| 1
to 12 – reminder time (months) OFF – no filter reminder
07| Auto-Changeover: thermostat automatically switches between heat
and cool| OFF| On – enable auto OFF – disable auto
Energy Saving Factory Schedule
This thermostat is programmed with the energy-saving settings shown in the table below for all days of the week.
| P 1 /Wake| P 2 /Leave| P 3 /Return|
P 4 /Sleep
---|---|---|---|---
Heating Schedule| 6:00 AM – 70°F| 8:00 AM – 62°F| 5:00 PM – 70°F|
10:00 PM – 62°F
Cooling Schedule| 6:00 AM – 78°F| 8:00 AM – 85°F| 5:00 PM – 78°F|
10:00 PM – 82°F
Note: Thermostat can be programmed on or off the subbase
Note: Thermostat can be programmed on or off the subbase
Modify the Heating Schedule
- Slide the system switch to Heat
- Press Menu
- Press Next to enter the schedule
- The time icons will flash – use or to set the time for the start of a period
- Press Next – the set point icons will flash – use or to set the temperature for the current period
- Continue to press Next to advance through all periods (P1/Wake, P2/Leave, P3/Return, P4/Sleep) for all days of the week.
Note: Press Back to return to the previous setting. Once all days of the week have been programmed the thermostat will display End. Press Exit at any time to save changes and return to home screen.
Modify the Cooling Schedule
- Slide the system switch to Cool
- Repeat steps 2-6 from the heating schedule
TROUBLESHOOTING
| |
---|---|---
Symptom| Possible Cause| Corrective Action
No Heat/ No Cool/ No Fan
(common problem)
| 1.) Blown fuse or tripped circuit breaker2.) Furnace power switch to OFF
3.) Furnace blower compartment door panel loose or not properly installed
4.) Loose connection to
thermostat or system
| 1.) Replace fuse or reset breaker2.) Turn switch to ON
3.) Replace door panel in proper position to engage safety interlock or door switch
4.) Tighten Connections
No Heat
| 1.) System Switch not set to Heat2.) Loose connection to thermostat or system
3.) Heating System requires service or thermostat requires replacement
| Verify thermostat and system wires are securely attached.Diagnostic: Set System Switch to Heat and raise the setpoint above room temperature. Within five minutes the thermostat should make a soft click sound and “Heat On” should appear on display. This sound indicates the thermostat is operating properly. If the thermostat does not click, try the
reset operation listed below. If the thermostat does not click after being reset, contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, contact the furnace manufacturer or a service person to verify
the heating system is operating correctly.
| Symptom | Possible Cause | Corrective Action |
|---|
No Cool
| 1.) System Switch not set to Cool2.) Loose connection to thermostat or system
3.) Cooling System requires service or thermostat requires replacement
| Verify thermostat and system wires are securely attached.Diagnostic: Set System Switch to Cool and lower setpoint below room temperature. Same procedures as diagnostic for “No Heat” condition except set the thermostat to Cool and lower the setpoint below the room temperature. There may be up to a five minute delay before the thermostat clicks in Cooling if the compressor lock-out option is selected in the installer
menu. (see INSTALLER MENU, item 50)
Heat, Cool or Fan Runs Constantly| Possible short in wiring, thermostat,
heat, cool or fan system| Check each wire connection to verify they are not
shorted or touching other wires. Try resetting the thermostat. If the
condition persists contact your HVAC service person.
Thermostat Display & Thermometer Disagree| Thermostat display requires
adjustment| Display can be adjusted +/-5°. See User Menu item04
Furnace (Air Conditioner) Cycles Too Fast or Slow (narrow or wide temperature
swing)| The location of the thermostat and/or the size of the Heating
System may be influencing the cycle rate| Digital thermostats provide precise
control and cycle faster than older mechanical models. The system turns on and
off more frequently but runs for a shorter time. If you would like to increase
cycle time, choose SLO for slow cycle in the Installer menu. (Reference menu
items 30 & 35) If an acceptable cycle rate is not achieved, contact your HVAC
service person.
“Call for Service” icon appears on display| 1.) Heating system is not able to
heat the space to within 10 degrees of the setpoint within 2 hours2.) Cooling
system is not able to cool the space to within 10 degrees of the setpoint
within 2 hours
3.) If “–” is displayed for the Room Temperature, a replacement thermostat is needed
4.) None of the buttons operate on the thermostat
| 1.) See corrective action for “No Heat”2.) See corrective action for “No Cool”
3.) Replace thermostat
4.) Make sure keypad lockout is not turned on(denoted by icon)
Resetting the Thermostat or Thermostat Settings
If the thermostat has good batteries, but has a blank display or does not
respond to keypresses, the thermostat should be reset by removing the
batteries for 2 minutes. This reset will not change the menu settings. If the
condition persists after reinstalling the batteries, replace the thermostat.
To conveniently reset only the user settings back to factory defaults, press
the Menu and Backlight buttons at the same time and hold until the display
goes blank and resets.
WARNING: This product contains a chemical known to the state of
California to cause cancer and birth defects and other reproductive harm.
HOMEOWNER HELPLINE: 1-800-284-2925
Emerson and White-Rodgers are trademarks of Emerson Electric Co. ©2017 Emerson Electric Co. All rights reserved. Operating Instructions Single Stage Thermostat Common