Honeywell RTH221B1021 Quick Installation Guide

69-2448ES—03 8
Quick Installation Guide
Set jumper JP2, on the back of the thermostat, if you
have a heat pump.
Set Heat Pump Reversing Valve
7
O Leave the jumper in this factory-set position if
you have connected O wire to the O/B terminal.
B Place the jumper to this position if you have
connected B wire to the O/B terminal.
Incorrect jumper setting: The heat pump operation will
be reversed, i.e., it will cool in Heat mode and will heat in
Cool mode.
JP2

Honeywell RTH221B1021 Specifications

General

Type	Non-programmable
Display	Digital
Power Source	Battery
Temperature Control Range	40°F to 90°F (4°C to 32°C)
Stages	1 Heat/1 Cool
Voltage	24V
Backlight	No
Compatibility	Single-stage heating and cooling systems