White Rodgers 1F85ST-0422 Installation, Wiring Connections, Remove Old Thermostat, Batteries

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INSTALLATION

!WARNING

Thermostat installation and all components of the control system shall conform to Class II circuits per the NEC code.

Figure 1 – Battery door shown open

“AA” Alkaline Batteries

Remove Old Thermostat

A standard heat/cool thermostat consists of three basic parts:

1)The cover, which may be either a snap-on or hinge type.

2)The base, which is removed by loosening all captive screws.

3)The switching subbase, which is removed by unscrewing the mounting screws that hold it on the wall or adapter plate. Before removing wires from old thermostat, label each wire with the terminal designation from which it was attached. Disconnect the wires from the old thermostat one at a time. Do not let wires fall back into the wall.

Installing New Thermostat

1)Pull the thermostat body off the thermostat base. Forcing or prying on the thermostat will cause damage to the unit.

2)Place base over hole in wall and mark mounting hole locations on wall using base as a template.

3)Move base out of the way. Drill mounting holes. If you are using existing mounting holes and the holes drilled are too large and do not allow you to tighten base snug- ly, use plastic screw anchors to secure the base.

4)Fasten base snugly to wall using mounting holes shown in Figure 2 and two mounting screws. Leveling is for appearance only and will not affect thermostat operation.

5)Connect wires to terminal block on base.

6)Push excess wire into wall and plug hole with a fire re- sistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.

7)Carefully line the thermostat up with the base and snap into place.

Thermostat can be powered by system AC power or Battery.

If is displayed, the thermostat is battery powered. If

is not displayed, thermostat is system powered with optional battery back-up. When battery power remaining is approxi-

mately half, the will be displayed. When “Change ” is displayed, install fresh “AA” alkaline batteries immediately. For best results, replace all batteries with new premium brand alkaline batteries such as Duracell® or Energizer®. We recom- mend replacing batteries every 2 years. If the home is going to be unoccupied for an extended period (over 3 months) and is displayed, the batteries should be replaced before leaving. When less than two months of battery life remain, the setpoint temperature will offset by 10 degrees (10 degrees cooler in Heat mode / 10 degrees warmer in Cool mode). If offset occurs, the normal setpoint can be manually reset with or . Another offset will occur within two days if batter- ies are not replaced.

Figure 2 – Thermostat base and rear view of thermostat

Mounting

Mounting

Hole

Hole

Place Level

Place Level

across

across

Mounting Tabs

Mounting Tabs

(for appearance only)

(for appearance only)

Batteries

2 “AA” alkaline batteries are included with the thermostat. To install the batteries, pull the battery door as shown by the arrow and lift open. Using the polarity indicated inside the bat- tery door, insert the batteries. To close the battery door, swing the door down while pulling in the direction of arrow. Once fully down, snap the door back into position. To replace the batteries, set system to OFF.

WIRING CONNECTIONS

Refer to equipment manufacturers’ instructions for specific

Refer to 37-6895for 1F83-0422/1F85-0422 wiring diagram

system wiring information. After wiring, see CONFIGURATION

specifications.

section for proper thermostat configuration.

 

 

 

TERMINAL DESIGNATION DESCRIPTIONS

 

 

 

 

Terminal

 

Terminal

 

Designation

Description

Designation

Description

 

 

 

 

L

Heat pump malfunction indicator for systems

W/E

Heat Relay/Emergency Heat Relay (Stage 1)

 

with malfunction connection

W2

2nd Stage Heat (3rd Stage Heat in HP 2)

O

Changeover valve for heat pump energized

G

Fan Relay

 

constantly in cooling

RH

Power for Heating

B

Changeover valve for heat pump energized

RC

Power for Cooling

 

constantly in heating

C

Common wire from secondary side of cooling system

Y

Compressor Relay

 

transformer or heat only system transformer

Y2

2nd Stage Compressor

6

3 Wire Zone Valve – Energized when no call for Heat

 

 

 

 

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Contents Save these instructions for future use SpecificationsApplications IndexInstalling New Thermostat InstallationWiring Connections Remove Old ThermostatThermostat Quick Reference Displays Adjuste Set for setpoint when in Run Program modeLlamar Servicio Call For Service indicates a fault Home Screen DescriptionPress Displayed INSTALLER/CONFIGURATION MenuButton Factory Default PressMenu will be skipped Calor ES1, EM2 Frio ES1, EM2 Bomba de Calor bC1 Aux bC1Grams per week can be toggled to P2 or P0 by pressing Program Override Temporary Override Choose the Vent Setting Auto or OnManual Operation for Non-Programmable Mode Set Current Time and DatePlanning Your Program Important Enter the Cooling ProgramEnergy Saving Energy Star Factory Pre-Program Worksheet for Re-Programming 5/2 Day and 5+1+1 Day ProgramReset Operation TroubleshootingSymptom Possible Cause Correction Action

1F85ST-0422 specifications

The White Rodgers 1F85ST-0422 is a renowned programmable thermostat that caters to the needs of both residential and commercial applications. Recognized for its user-friendly interface and advanced features, this thermostat is designed to provide optimal comfort while ensuring energy efficiency.

One of the standout features of the 1F85ST-0422 is its 7-day programmable scheduling. Users can customize heating and cooling schedules for each day of the week, allowing them to set specific temperature preferences for different times of the day. This flexibility not only enhances comfort but also promotes energy savings by reducing usage during non-peak hours.

The thermostat boasts a large backlit display, which is easy to read, even in low-light conditions. The touchscreen interface simplifies navigation, making it intuitive for users to adjust settings or review programming schedules. The visual feedback provided by the display ensures that users can monitor their climate control at a glance.

This model incorporates a Smart Recovery feature, which starts the heating or cooling system ahead of the scheduled start time, ensuring that the desired temperature is reached exactly when intended. This proactive approach minimizes temperature fluctuations and enhances overall comfort in the home or workspace.

Another significant technological aspect of the White Rodgers 1F85ST-0422 is its compatibility with various heating and cooling systems, including conventional, heat pumps, and multi-stage systems. This versatility makes it an excellent choice for a wide range of installations.

The thermostat is also equipped with advanced energy management and diagnostic features. Users receive alerts for maintenance needs, such as filter changes, which helps to ensure the continued efficiency of the HVAC system. Additionally, the thermostat's energy use reports provide insights into consumption patterns, enabling users to make informed decisions about their heating and cooling usage.

In terms of installation, the White Rodgers 1F85ST-0422 is designed for straightforward mounting and setup. With the included user manual and clearly labeled terminals, even those with minimal technical expertise can install it with ease.

In summary, the White Rodgers 1F85ST-0422 is a feature-rich programmable thermostat that combines advanced technology, user-friendly design, and energy-saving capabilities, making it a smart choice for anyone looking to optimize their indoor climate control.
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