Honeywell T8424C

15 68-0180-3

Contents

Main PRODUCT DATA T8400C, T8401C and T8424C,D Electronic Thermostats APPLICATION FEATURES T8400C and T8401C T8424C,D ORDERING INFORMATION SPECIFICATIONS INSTALLATION When Installing this Product CAUTION MERCURY NOTICE UP Location Mounting Decorator Cover Plate and Wallplate to Wall Wiring G C R Y W1 Y2 W2 B O 68-0180-3 6 G R C Y2 Y W1 B O 7 68-0180-3 Mounting Thermostat to Wallplate SETTINGS AND ADJUSTMENTS B Setting Fan and System Switches Fan Switch A Set Temperature Setpoint Setting F/C Indication and Heat Cycle Rate OPERATION Zero Droop Performance Power Stealing Energy Savings Sequence of Operations Fan Control Heat Mode Cool Mode CAUTION Fan 13 68-0180-3 TROUBLESHOOTING Refer to Fig. 21 for the proper troubleshooting procedure. Fig. 21. Troubleshooting procedure. SYMPTOM POSSIBLE CAUSE ACTION