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Honeywell RTH221 Series User Manual

Honeywell RTH221 Series
52 pages
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69-2606ES-01
Quick Installation Guide
RTH2300/RTH221 Series
Programmable Thermostat
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Honeywell RTH221 Series Specifications

General IconGeneral
Stages1 Heat/1 Cool
Voltage24V
Temperature Range40°F to 90°F (4°C to 32°C)
BacklightNo
DisplayDigital
Power SourceBattery
Temperature ControlManual
CompatibilityGas, Oil, Electric
TypeNon-Programmable Thermostat
Program PeriodsNot Applicable

Summary

Turn Off System Power

Remove Old Thermostat

Label Wires for Installation

Separate Thermostat Wallplate

Mounting Wallplate

Connecting Thermostat Wires

Install Thermostat Batteries

Set Fan Operation Switch

System Type Fan Switch Settings

Specific settings for gas/oil vs. electric/heat pump systems.

Attach Thermostat to Wallplate

Restore System Power

Advanced System Setup Guide

Accessing Thermostat Setup Menu

Procedure to enter the thermostat's system setup mode.

Modifying Thermostat Settings

Heating Cycle Rate Configuration

System Specific Heating Cycle Rates

Specific settings for gas, oil, electric, hot water, and steam systems.

Temperature Display Settings

Compressor Protection Configuration

Understanding Compressor Protection Feature

Details on the function and purpose of compressor protection.

Alternate Wiring Guide

Wiring Chart and Notes

Reference chart and important notes for alternative wiring methods.

Heat Pump Specific Wiring Instructions

Special wiring instructions for heat pumps without auxiliary heat.

Troubleshooting Common Thermostat Issues

Display and System Response Troubleshooting

Steps to fix a blank display or unresponsive heating/cooling system.

Customer Support Contact Information

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