Honeywell Heat/1Cool User Guide - Page 76
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KEEPRITE Electromechanical Chronotherm® III Electronic Replacement or Upgrade Chronotherm IV T841A1712 Y594R1425 Y5Y9549G41G4174619 T8T681611G11R0100400 T8T481411R11R0120802 T8T581511G11G0140721 T8T081011R11R0110406 T8T681611G12G0220802 W890P0CB8190000/2 Existing Function Terminals Common ¿ B X X X C C C C C C Power R Compressor Y 1st Stage - Heat Aux. Heat W R R R R R R R R R or Y Y Y1 Y1 Y Y Y1 Y Y1 Y1/W1 ´ ´ ´ ´ ´ ´ ´ - W1 W1 W1 W1 W1 W1 W1 - · W2 W2 W2 W2 W2 W2 W2 W2 Aux. Fan G G G G G G G G G G C/O Valve - B B B B ᕡ or B B O/B B ᕡ or B O/B ᕡ O/B Heat C/O Valve O O O O O ᕡ or O O O/B O ᕡ or O O/B ᕡ O/B Cool System - - L - L L L L L L Monitor Em. Heat X E E E E E E E E E Multiple Aux. Heat Loads » - W3 W3 W3 - - - - - - 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. · When W2 is not used, configure W2 cycle rate to NC. » Terminal is for multiple auxiliary heat loads such as contactors, sequencers, or relays. ¿ Terminal X (C,B) must be connected to transformer common. ´ Leave factory-installed jumper in place. Y2 M13193 70-6627 • 74 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER T874R1814/Q674L1132