Honeywell T8401C1015 Installation Instructions - Page 3

T8400C, T8401C ELECTRONIC THERMOSTATS KEEP WIRING IN SHADED AREA G Rc R W B Y O MOUNTING SCREW HOLE WIRING ENTRANCE HOLE MOUNTING SCREW HOLE M16432 Fig. 4. Restrict wiring to shaded area (T8400C shown). TERMINAL SCREW G FOR STRAIGHT INSERTION STRIP 5/16 IN. (8 MM) FOR WRAPAROUND STRIP 7/16 IN. (11 MM) Rc R W Y B O M13274 Fig. 5. Wiring connections (T8400C shown). G Rc 2 R W B Y O COOLING CONTACTOR 1 L1 (HOT) 24V L2 HEATING PRIMARY CONTROL FAN RELAY 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 FACTORY INSTALLED JUMPER. M13275 Fig. 6. Typical hookup of T8400C in heat-cool system with single transformer. G Rc R 24 W B Y O 1 L1 (HOT) L2 FAN RELAY 3 COOL DAMPER 3 HEAT DAMPER COMPRESSOR CONTACTOR HEAT RELAY 1 L1 (HOT) L2 COOLING TRANSFORMER HEATING TRANSFORMER 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 REMOVE RC TO R JUMPER WHEN INSTALLED ON A TWO TRANSFORMER SYSTEM. 3 CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT PUMP SYSTEMS. 4 POWER TO R TERMINAL IS REQUIRED WHEN THE SYSTEM SWITCH IS IN THE OFF POSITION. M12562A Fig. 7. Typical hookup of T8400C in heat-cool system with two transformers. G Rc 3 R W 4 Y 2 HEAT CHANGEOVER B 2 COOL O CHANGEOVER 1 L1 (HOT) 24V L2 TRANSFORMER COMPRESSOR FAN RELAY 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT PUMP SYSTEMS. 3 FACTORY INSTALLED JUMPER. 4 FIELD INSTALLED JUMPER. M20880 Fig. 8. Typical hookup of T8400C in single-stage heat pump systems. 3 69-1740