White Rodgers 1F86-241 User Manual

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.
Thermostat installation and all components of the
system shall conform to Class II circuits per the NEC
code.
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
Your new White-Rodgers Digital Thermostat uses the technol-
ogy of a solid-state microcomputer to provide precise time/
temperature control. This thermostat offers you the flexibility to
design heating and cooling programs that fit your needs.
Features:
• 24 Volt System powered
• Simultaneous heat and cool set point storage
• Pre-set temperature control
• Backlit display
• LCD continuously displays set point and room temperature
• °F/°C convertibility
• Temperature range 45° to 90°F
• RC, RH, C, W, Y, G , O and B terminals
• B and O terminals for single stage heat pumps (no auxiliary
heat) or damper operation
• Set point storage in case of power loss
SPECIFICATIONS
ELECTRICAL DATA
Electrical Rating:
18 to 30 VAC 50/60 Hz. or D.C.
0.05 to 1.0 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:
-4°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
• Hydronic (hot water or steam) systems
• Single-stage heat pump systems (no auxiliary heat)
DO NOT USE WITH:
• Millivolt systems
• Multi-stage systems
• Systems exceeding 30 VAC and 1.5 amps
• 3-wire zoned hydronic heating systems
1F86-241
Non-Programmable Electronic Digital Thermostat
Printed in U.S.A.
PART NO. 37-6165B
Replaces 37-6165A
0105
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
INSTALLATION AND
OPERATION INSTRUCTIONS
PRECAUTIONS
CAUTION
!
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.
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.
WARNING
!
Operator: Save these instructions for future use!
WHITE-RODGERS

White Rodgers 1F86-241 Specifications

General

Voltage	24 VAC
Accuracy	±1°F
Color	White
Compatibility	Heating and Cooling Systems
Display	LCD
Temperature Range	40°F to 99°F
Power Source	Hardwired
Mounting	Wall Mounted

Summary

DESCRIPTION

Features

Lists key operational and functional characteristics of the thermostat.

System Description

Details the thermostat's display, temperature range, and terminals.

PRECAUTIONS

Safety Warnings

Warns against using circuits exceeding voltage, shorting terminals, and improper wiring.

Electrical Safety

Advises disconnecting power before installation to prevent shock or damage.

SPECIFICATIONS

Applications and Compatibility

Lists compatible heating/cooling systems and systems to avoid.

Electrical Ratings

Details voltage, current ratings, and maximum load for the thermostat.

Thermal Data

Specifies setpoint and operating temperature/humidity ranges.

INSTALLATION

Remove Old Thermostat

Step-by-step guide for safely removing the existing thermostat and its wiring.

Electric Heat or Single-Stage Heat Pump Systems

Instructions on setting the electric heat switch based on system type.

Attach Thermostat Base to Wall

Procedures for mounting the thermostat base, connecting wires, and leveling.

Hydronic (Hot Water or Steam) Heating Systems

Guidance on configuring the thermostat for hydronic heating systems.

Check Thermostat Operation

Steps to test fan, heating, and cooling system functionality after installation.

Fan and System Testing

How to test fan, heating, and cooling system operation via switch settings.

OPERATION

The Thermostat Buttons and Switches

Identifies and explains the function of thermostat buttons and switches.

CONFIGURATION MENU

Select Compressor Lockout

Configure compressor protection against short cycling by setting a time delay.

Select Temperature Display Adjustment

Adjust the displayed room temperature up or down by 4 degrees.

Select Temperature Display (°F or °C)

Choose between Fahrenheit (°F) or Centigrade (°C) for temperature display.

Select FA or SL Heating Cycle Rate

Set heating cycle rate for gas/electric (FA) or hydronic (SL) systems.

Select Display Backlight

Control the display backlight, choosing between continuous ON or OFF.

OPERATING FEATURES

Simultaneous Program Storage

Store both heating and cooling set points simultaneously for seasonal changes.

SETTING THE THERMOSTAT

Basic Operation Guide

Guide to setting temperature and fan modes using SYSTEM and FAN switches.

TROUBLESHOOTING

No Heating Issues

Troubleshooting steps when the heating system does not activate.

No Cooling Issues

Troubleshooting steps when the cooling system does not activate.

Blank Display Issues

Diagnosing and resolving issues related to a blank thermostat display.

Reset Procedure

Procedure to reset the thermostat to factory defaults in case of errors.