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Emerson 1F85U-42PR - User Manual

Emerson 1F85U-42PR
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PART NO. 37-7554D
Replaces 37-7554C
1652
1F85U-42PR (Programmable)
Installation and Operating Instructions
Universal Thermostat
Battery Powered or Hardwired with Common
white-rodgers.com
emersonclimate.com
Thermostat Applications
Maximum
Stages
Heat/ Cool
Conventional Gas, Oil, Electric
(mV and 24V), Heat only, Cool only or
Heat/Cool Systems
2/2
Heat Pump (Air Source or Geothermal)
with Aux. Heat
4/2
Thermostat Installation
2-4
Wiring
2
Installer Menu
3-4
Test Equipment
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
INDEX
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.
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 .......................................... 1.5 A per terminal, 2.5A maximum all terminals combined
Setpoint Range ........................................ 45° to 99° F (to 37° C)
Rated Dierentials (@ 6°F/ Hr): Fast Med Slow
Heat (Conventional Gas / Oil / Elect) ..... 0.5°F 0.75°F 1.9°F
Cool (Central Air) ................................. 0.9°F 1.2°F 1.7°F
Heat Pump (Heat and Cool) ................ 0.9°F 1.2°F 1.7°F
Heat Pump Aux. .................................. 0.5°F 0.75°F 1.9°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 maximum
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
SPECIFICATIONS
N
O
DE PIÈCE 37-7554D
1F85U-42PR (programmable)
Instructions d’installation et d’utilisation
Thermostat universel série 80
TM
Alimentation par piles ou câblée avec l commun
white-rodgers.com
emerson.com
Applications du thermostat
Nombre
maximum
d’étages
chauage/
climatisation
Systèmes au gaz classique , au mazout,
à l’électricité (mV et 24 V), chauage
seulement, climatisation seulement ou
chauage et climatisation
2/2
Thermopompe (source d’air ou
géothermique) avec chauage auxiliaire
4/2
Installation du thermostat
2-4
Câblage
2
Menu de l’installateur
3-4
Mise à l’essai de l’équipement
4
Utilisation du thermostat
5-7
Aperçu du thermostat
5
Menu de l’utilisateur
6
Fonctionnement du thermostat
6
Horaire du thermostat
7
Dépannage
7-8
Ligne d’assistance pour les propriétaires
8
INDEX
AVIS RELATIF AU MERCURE : Ce produit ne contient pas de
mercure. Il peut toutefois remplacer un produit qui en contient.
Le mercure et les produits contenant du mercure ne doivent pas
être jetés dans les ordures ménagères. Consultez le site
www.thermostat-recycle.org pour connaître les endroits où
vous pouvez envoyer le produit contenant du mercure.
Paramètres électriques :
Batterie ................................................................. mV à 30 V c.a., NEC classe II, 50/60 Hz
Câblé ..................................................................... 20 à 30 V c.a., NEC classe II, 50/60 Hz
Charge à la borne ........................................................ 1,5 A par borne, 2,5 A maximum pour toutes les bornes combinées
Plage de réglage ......................................................... 45 à 99 °F (7 à 37 °C)
Diérentiel nominal (@ 6 °F/h) : ................................. Rapide Moyen Lent
Chauage (gaz classique/mazout/électricité) ......... 0,5 °F 0,75 °F 1,9 °F
Climatisation (centrale) ......................................... 0,9 °F 1,2 °F 1,7 °F
Thermopompe (climatisation et chauage) .......... 0,9 °F 1,2 °F 1,7 °F
Thermopompe, chauage auxiliaire ...................... 0,5 °F 0,75 °F 1,9 °F
Température ambiante de fonctionnement ................ 32 °F à +105 °F (0 à +41 °C)
Plage de températures achées ................................... 32 °F à +99 °F (0 à 37 °C)
Humidité de fonctionnement ...................................... 90 % max. sans condensation
Plage de températures d’expédition ........................... -20 °F à +150 °F (-29 à +65 °C)
Dimensions du thermostat ......................................... 3-3/4 po H x 6 po L x 1-1/8 po P
SPÉCIFICATIONS
Accessoire en opon : plaque murale F61-2663, 6-3/4 po L x 4-1/2 po H
Optional Accessory: Wall
Cover-Up Plate F61-2663,
6 3/4” W x 4 1/2” H
Programming
made Simple
See page 7
1652

Other manuals for Emerson 1F85U-42PR

Questions and Answers

  • M
    Michael DiazJul 29, 2025
    How to fix Emerson 1F85U-42PR when it's not cooling?
    • T
      tara89Jul 29, 2025
      If your Emerson Thermostat isn't cooling, first, ensure the thermostat is set to the 'Cool' mode. Next, check that all wires connected to the thermostat and the system are securely attached. If the issue persists, the cooling system might require servicing, or the thermostat may need replacement. To diagnose, set the system to 'Cool' and lower the setpoint below the room temperature. Note that there may be a delay of up to five minutes before cooling starts if the compressor lock-out option is enabled.
  • J
    jonathan38Aug 3, 2025
    Why is my Emerson 1F85U-42PR cycling too fast or slow?
    • D
      Daniel RodriguezAug 3, 2025
      If your Emerson Thermostat cycles too fast or slow, the location of the thermostat or the size of the heating system could be influencing the cycle rate. Digital thermostats cycle faster than older models, turning on and off more frequently but running for a shorter time. To increase cycle time, select 'SLO' for slow cycle in the Installer menu. If an acceptable cycle rate isn't achieved, contact your HVAC service person.
  • P
    patty27Aug 9, 2025
    How to adjust Emerson 1F85U-42PR Thermostat display if it disagrees with thermometer?
    • T
      Tanya ParkerAug 9, 2025
      If your Emerson Thermostat display and a thermometer disagree, the thermostat display might need adjustment. You can adjust the display by +/-5 degrees. Refer to User Menu item 05 to make this adjustment.
  • J
    Joseph OlsenAug 15, 2025
    What to do if the 'Call for Service' icon appears on my Emerson 1F85U-42PR Thermostat display?
    • T
      Timothy RiceAug 15, 2025
      If the 'Call for Service' icon appears on your Emerson Thermostat, it could mean several things. First, if the room temperature displays '--', the thermostat likely needs replacing. Also, make sure the keypad lockout is not turned on. If it's off, try resetting the thermostat. Finally, if the 'Call for Service' icon is flashing, a service person should verify that the outdoor equipment is operating correctly.
  • S
    Stephanie MooreAug 22, 2025
    Why does my Emerson Thermostat heat, cool, or fan run constantly?
    • Z
      Zoe LewisAug 22, 2025
      If your Emerson Thermostat's heat, cool, or fan runs constantly, there might be a short in the wiring, the thermostat itself, or the heating/cooling/fan system. Check each wire connection to ensure they are not shorted or touching other wires. Try resetting the thermostat. If the problem continues, contact an HVAC service person.

Summary

WIRING

Terminal Designations and Functions

Lists terminal designations and their corresponding functions for wiring the thermostat.

Precautions

General Safety and Handling Precautions

Emphasizes careful handling and adherence to electrical codes and ratings.

INSTALLER MENU

Installer Menu Configuration Options

Lists configurable settings for outdoor/indoor equipment, cycles, and temperature limits.

RC;RH Jumper Wire Usage

Explains how to use the RC/RH jumper for separate wire connections.

Battery Location and Backup Power

Details battery requirements and backup power function during outages.

USING THE THERMOSTAT

Thermostat Buttons and Switches Overview

Identifies and describes the function of each button and switch on the thermostat.

Thermostat Display Overview

Explains the meaning of various icons and indicators shown on the thermostat display.

USER MENU

User Menu Configuration Options

Lists customizable settings for scheduling, display, and filter reminders.

THERMOSTAT SCHEDULE; PROGRAMMING

Energy Saving Factory Schedule

Details the default energy-saving schedule and how to modify it.

TROUBLESHOOTING

Troubleshooting Symptoms and Corrections

Provides common issues and their corresponding corrective actions for thermostat operation.

Thermostat Reset and Settings

Explains how to reset the thermostat and the consequences for settings.

Emerson 1F85U-42PR Specifications

General IconGeneral
TypeProgrammable Thermostat
ChangeoverAutomatic or manual
DisplayBacklit
Schedule7-day programmable
Temperature Range45°F to 90°F (7°C to 32°C)
Power SourceBattery or hardwired
Voltage24V
Weight0.5 lbs
Terminal DesignationsR, W, Y, G

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