Honeywell Heat/1Cool User Guide - Page 51
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ENERSTAT Electromechanical Chronotherm® III Electronic Replacement or Upgrade Chronotherm IV T841A1712 Y594R1425 Y5Y9549G41G4174619 TTT888666111111GRM117000000408 T8T481411R11R0120802 T8T581511G11G0140721 T8T081011R11R0110406 T8T6816111M2M0220517 W890P0CB8190000/2 Function Existing Terminals Common ´ X X X X C C C C C Power R R 1st Stage HP1 or · HP Y Compressor 1st Stage - - Heat R R R Y1 Y1 Y1 or Y ¶ ¶ ¶ W1 W1 W1 R R R R Y Y1 Y Y1 ¶ ¶ ¶ W1 W1 W1 - 2nd Stage - W2 W2 W2 W2 W2 W2 W2 W2 Aux. Heat 3rd Stage - - - - W3 - - - W3 Aux. Heat Fan G G G G 2nd Stage Comp. » HP2 » C/O Valve B B B B Heat » C/O Valve O O O O Cool G µ Y2 B O G G G ³ or B B O/B B ³ or O O O/B O G Y2 ³ O/B ³ O/B System Monitor/ - - L X1 L System Defrost L L L L EM. Heat - E E E E E E E E Multiple Aux. - W3 W3 W3 - Heat Loads ¿ - - - - Remote Sensor - LED Indication - - - - - - - - X2 º X2 º X1 X2 ² - - - - - X1 X2 ³ Configure O/B (select models) in Installer Setup. · Both first stage heat and cool are connected to HP terminal. » If provided on original equipment. ¿ Terminal is for multiple auxiliary heat loads such as contactors, sequencers, or relays. ´ Terminal X (C) must be connected to transformer common. ² Optional CHECK LED on T8611G,M. See Fig. 26 and 27. ¶ Do not remove factory-installed jumper. º Field-installed X2 to X jumper (provided). ¾ When W2 is not used, configure W2 cycle rate to NC. µ T8611M7008 Model. C R Y/W1 - ¾ Aux. - G Y2 ³ O/B ³ O/B L E - - - M13173 70-6627 • 49