White Rodgers 1F86-444

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To prevent electrical shock and/or equipment dam-

age, disconnect electric power to system, at main fuse

or circuit breaker box, until installation is complete.

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 damage

thermostat and could cause personal injury and/or

property damage.

Printed in U.S.A.

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY

BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE

PERSONAL INJURY AND/OR PROPERTY DAMAGE.

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.

9797 REAVIS ROAD

ST. LOUIS, MISSOURI 63123-5398

WHITE-RODGERS

INSTALLATION AND

OPERATION INSTRUCTIONS

1F86-444

Non-Programmable Electronic Digital Thermostat

PRECAUTIONS

SPECIFICATIONS

This thermostat is intended for use with a low voltage system; do

not use this thermostat with a line voltage system. If in doubt

about whether your wiring is millivolt, line, or low voltage, have

it inspected by a qualified heating and air conditioning contractor

or electrician.

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.

ELECTRICAL DATA

Electrical Rating:

8 to 30 VAC 50/60 Hz. or D.C.

0.05 to 1.5 Amps (Load per terminal)

1.5 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

APPLICATIONS

For use with:

• Standard heat/cool or heat only systems

• Electric heat systems

• Gas or oil fired systems

• Gas systems with intermittent ignition devices (I.I.D.) and/

or vent dampers

• Single-stage heat pump systems

• Millivolt systems

DO NOT USE WITH:

• Multi-stage systems

• Systems exceeding 30 VAC and 1.5 amps

• 3-wire zoned hydronic heating systems

PART NO. 37-5410C

Replaces 37-5410B

9805

Operator: Save these instructions for future use!

DESCRIPTION

Your new White-Rodgers Digital Thermostat uses the technol-

ogy of a solid-state microcomputer to provide precise tempera-

ture control.

Features:

• Battery powered (3 “AA” Energizer

alkaline batteries in-

cluded).

• Simultaneous heat and cool temperature storage

• LCD continuously displays set point and room temperature

• °F/°C convertibility

• Temperature range 45° to 90°F

• Standard five terminals for single or two-transformer sys-

tems

• B and O terminals for single stage heat pumps or damper

operation

CAUTION

WARNING

Need help?

Do you have a question about the White Rodgers 1F86-444 and is the answer not in the manual?

Summary

Description

Precautions

Specifications

Applications

Lists the types of HVAC systems the thermostat is compatible with.

Do Not Use With

Lists systems or conditions for which the thermostat is not suitable.

Installation

Remove Old Thermostat

Steps for safely removing the existing thermostat from the wall.

Electric Heat or Single-Stage Heat Pump Systems

Instructions for setting the electric heat switch for specific system types.

Attach Thermostat Base to Wall

Procedure for mounting the new thermostat base securely to the wall.

Battery Location

Information on installing and replacing the thermostat's AA batteries.

Check Thermostat Operation

Fan Operation

How to test the fan functionality (ON/AUTO modes).

Heating System

Procedure for testing the heating system operation via the thermostat.

Cooling System

Procedure for testing the cooling system operation, including time delay.

Operation

The Thermostat Base

Overview of the thermostat cover, base, and their separation.

The Thermostat Buttons and Switches

Description of buttons and switches located on the thermostat cover.

The Display

Explanation of the information shown on the thermostat's LCD display.

Operating Features

Highlights key functionalities like simultaneous heating/cooling and battery status.

Temperature Display Adjustment

Instructions for adjusting the thermostat's temperature display range.

Setting the Thermostat

Guidance on adjusting temperature setpoints and fan modes.