Page 2 - Table Of Contents; TROUBLESHOOTING; CAUTION; Follow; WARNING; Replacement Components Division Carrier Corporation 4/01
Table Of Contents PREPARATION REMOVE OLD THERMOSTAT WIRE CONNECTIONS WIRING DIAGRAMSCALIBRATIONTEST OPERATION TROUBLESHOOTING Page 1 CAUTION Follow Installation Instructions carefully. DISCONNECT POWER TO THE HEATER - AIR CONDITIONER BEFORE REMOVINGTHE OLD THERMOSTAT AND INSTALLINGTHE NEW THERMOSTAT...
Page 4 - REMOVE & REPLACE OLD THERMOSTAT
Page 3 Remove the cover of the old thermostat.If it does not come off easily check forscrews. Loosen the screws holding the thermostatbase or subbase to the wall, and lift away. Disconnect the wires from the oldthermostat. Tape the ends of the wiresas you disconnect them, and mark themwith the lette...
Page 5 - WIRE CONNECTIONS; refer to the chart below,
STEP #3 WIRE CONNECTIONS Page 4 If the terminal designations on your oldthermostat do not match those on the new thermostat, refer to the chart below, or the wiring diagrams that follow. * C may not be used on all systems. ** O/B is used if your system is a Heat Pump. Wire from the old thermostat te...
Page 6 - Sample Wiring Diagrams
Sample Wiring Diagrams Thermostat Thermostat Page 5 R C G Y1 Y2 W1 W2 O E L R C G Y1 Y2 W1 W2 O 24 vac common 24 vac return fan relay compressor relay 1st stage heat circuit R C G Y1 Y2 W1 W2 O E L R C G Y1 Y2 W1 W2 O 24 vac return fan relay compressor relay 1st stage heat circuit 5 Wire, 1 Stage Co...
Page 9 - special needs
Sample Wiring Diagram Calibration Page 8 R C G Y1 Y2 W1 W2 O E L R C G Y1 Y2 W1 W2 O 24 vac common 24 vac return fan relay compressor relay 1st stage heat circuit 2nd stage heat circuit 6 Wire, 1 Stage Cooling, 2 Stage Heat, Heat Pump * Most residential split and package heat pumpswith auxiliary hea...
Page 10 - TEST OPERATION; HEAT; COOL; icon appears on the display.
STEP #4 TEST OPERATION Page 9 Press the On/Off button repeatedly untilthe HEAT icon appears on the display. Press the Up or Down buttons until the settemperature is 10 degrees above roomtemperature. The furnace should turn on. Press the On/Off button repeatedly untilthe COOL icon appears on the disp...
Page 11 - at the furnace; For Problem Heat
SYMPTOM: When using 4 wires (R, G, W, Y), the air conditioning equipment tries repeatedly to turn on, but cannot. At times the display dims or disappears. CAUSE: There is not enough power available to "power share". REMEDY: Connect a 270 ohm, 10 watt power resistor at the furnace as shown be...