• 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 Printed in U.S.A. 1F87-51 INSTALLATION AND DESCRIPTION PRECAUTIONS CAUTION WARNING SPECIFICATIONS PART NO.
INSTALLATION REMOVE OLD THERMOSTAT 1. Shut off electricity at the main fuse box until installation is complete. Ensure that electrical power is disconnected. 2. Remove the front cover of the old thermostat. With wires still attached, remove wall plate from the wall. If the old thermostat has a wall mounting plate, remove the thermostat and the wall mounting plate as an assembly.
Heating System Figure 3. Typical wiring diagram for heating only, 2-wire, single transformer systems or millivolt systems Thermostat NOTE Jumper wire must be added between R and B terminals on the primary control (jumper wire not provided with thermostat). Add jumper wire (not provided with thermostat) Figure 4.
Cooling System This thermostat has a built-in short-term (5-minute) time delay. This feature is activated after the compressor shuts down and the setpoint is changed within the 5-minute period. During this 5-minute period, COOL will flash on the display indicating that the thermostat has locked out the compressor to allow head pressure to stabilize.
OPERATING FEATURES Now that you are familiar with the thermostat buttons and display, read the following information to learn about the many features of the thermostat. • SIMULTANEOUS HEATING/COOLING PROGRAM STORAGE — When programming, you can enter both your heating and cooling programs at the same time. There is no need to reprogram the thermostat at the beginning of each season.
THIS THERMOSTAT ALLOWS ONE SET OF TIMES FOR BOTH HEATING AND COOLING Period 1 Heat Time Temp. Monday Tuesday Wednesday Thursday Friday Saturday Sunday THIS THERMOSTAT ALLOWS ONE SET OF TIMES FOR BOTH HEATING AND COOLING Period 1 Heat Time Temp.
4. Press to change the displayed temperature to your selected HEAT 1 setting (if you only want to program a temperature for HEAT 1, skip to step 8). 5. Press SET TIME/SET TEMP once. The number 1 will change to the number 2, representing HEAT 2. 6.
NOTE If you are programming your thermostat for the first time, and you want programming for all days of the week to be the same as Monday’s program, press RUN PRGM to begin program opera- tion (this COPY DAY feature only works the first time you program your thermostat;...