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1F82-261
Programmable Electronic Digital
Heat Pump Thermostat
INSTALLATION AND
OPERATION INSTRUCTIONS
Operator: Save these instructions for future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
LCD continuously displays set point, and alternately dis-
Your new White-Rodgers 5-Day/1-Day/1-Day Digital Thermo-
stat uses the technology of a solid-state microcomputer to plays tim
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W904 INSTALLATION Optional (2) "AA" batteries REMOVE OLD THERMOSTAT 1. Shut off electricity at the main fuse box until installation is Screw anchors 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. 3. Identify each wire attached to the old thermostat using the labels e
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THERMOSTAT O/B Y G W2 E C L R SYSTEM See Note ** SYSTEM Changeover MONITOR Fan Emergency Relay* SWITCH Aux Compressor Relay Relay Relay Contactor (Stage 2) Hot 24 VAC 120 VAC Neutral * Changeover Relay is energized in COOL when O/B switch is in the “O” position Changeover Relay is energized in HEAT when O/B switch is in the “B” position TRANSFORMER ** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency (Class II Current Limited) Figure 2. Typical wiring diagram for
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1 Emergency System CHECK THERMOSTAT OPERATION EMER bypasses the Heat Pump to use the heat source wired If at any time during testing your system does not operate to terminal E on the thermostat. EMER is typically used when properly, contact a qualified service person. compressor operation is not desired, or you prefer back-up heat Turn on power to the system. only. 1. Move SYSTEM switch to EMER position, EMER will flash on Fan Operation the display. If your system does not have a G terminal conn
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The Display Press HOLD to change to the next menu item or press TIME to go backwards to the previous item in the menu. To exit the menu 9 and return to the program operation, press RUN. If no keys are Indicates day of the week. pressed within fifteen minutes, the thermostat will revert to 10 Indicates a malfunction with the system. normal operation. 1) Select Temporary Hold Time - The thermostat can hold any 11 Flame icon ( ) is displayed when the SYSTEM switch is in temperature you set it to fo
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4) Select backlit display - The display backlight improves MANUAL OPERATION display contrast in low lighting conditions. Selecting back- HOLD TEMPERATURE — With the SYSTEM switch set to light ON will keep the light on continuously. Selecting OFF HEAT or COOL, momentarily press HOLD button. HOLD will keep the light off. will be displayed. Use or to adjust the temperature. 5) Select Energy Management Recovery OFF or ON - The thermostat will hold the room temperature at the Energy Management R
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Use the table to plan your program time periods and the 6. Repeat steps 3 and 4 to select the start time and heating temperatures you want during each period. Fill in the complete temperature for the 2nd heating program period. table to have a record of your programs. 7. Repeat steps 3 through 5 for the 3rd and 4th heating program periods. Entering Your Program 8. Press PRGM once. “SA” (indicating Saturday program) will appear in the display, along with the start time for the 1st Set Current Tim
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TROUBLESHOOTING Reset Operation stat by pressing the reset button (see Fig 1). If the thermostat If a voltage spike or static discharge blanks out the display or has power, has been reset and still does not function correctly causes erratic thermostat operation you can reset the thermo- contact your heating/cooling service person or place of pur- chase. Symptom Possible Cause Corrective Action No Heat/No Cool/No Fan 1. Blown fuse or tripped circuit breaker. Replace fuse or reset breaker. (common
