Honeywell Heat/1Cool User Guide - Page 66
Retail Heat Pump Thermostats
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HONEYWELL RETAIL HEAT PUMP THERMOSTATS Electromechanical Chronotherm® III Electronic Replacement or Upgrade Chronotherm IV T841A1712 Y594R1425 Y5Y9549G41G4174619 T8T681611G11R0100400 T8T481411R11R0120802 T8T581511G11G0140721 T8T081011R11R0110406 T8T681611G12G0220802 W890P0CB8190000/2 Existing Function Terminals Common ¿ X X X X C C C C C C Power · R R Compressor Y1 Y ² 1st Stage W1 - Heat Aux. Heat W2 W2 R Y ² W1 R Y1 ² W1 R Y1 or Y ² W1 W2 W2 W2 R R R Y Y1 Y ² ² ² W1 W1 W1 W2 W2 W2 R Y1 ² W1 R » Y1/W1 - ´ W2 Aux. Fan G C/O Valve B Heat C/O Valve O Cool System L Monitor G G G B B B O O O ¶ L G B O º L G G ³ or B B O/B ³ or O O O/B º L ¶ L G G ³ or B B O/B ³ or O O O/B º L ¶ L G ³ O/B ³ O/B ¶ L EM. Heat E E E E E E E E E E LED Indication - 2nd Stage - Compressor - X2 X1 X2 X1 X2 - - - - - - - - - X1 X2 - ´ - - W2 2nd Stage - Cool - - - ³ Configure O/B (select models) in Installer Setup. · For best performance, use a NEMA standard transformer. » If separate Y1 and W1 terminals are required, install R8222D1014; see page 12. ¿ Terminal X (C) must be connected to transformer common. - - - - - Y2 ´ When W2 is not used, configure W2 cycle rate to NC. ² Do not remove factory-installed jumper. ¶ LED is energized when terminal is powered. º L terminal is powered continuously when thermostat is in Em. Ht. position. M13188 70-6627 • 64 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER CT70A1001 CT8611R1006