Honeywell Heat/1Cool User Guide - Page 116
T874G1410/Q674F13116TH11703024
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YORK/BORG WARNER 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 R R R R R R R R Compressor Y 1st Stage Heat or Y Y Y1 Y1 Y Y Y1 Y Y1 Y1/W1 ¶ ¶ ¶ ¶ ¶ ¶ ¶ - W1 W1 W1 W1 W1 W1 W1 - · Aux. Heat W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux. Fan G G C/O Valve - B Heat C/O Valve O O Cool ¿ System Monitor/ L System Defrost ¿ Em. Heat E E Multiple Aux. W3 ¿ W3 Heat Loads » G G B B O µ L O µ X1 E E W3 W3 G B O ¸ L E ² G G or ³ B B O/B or ³ O O O/B ¸ L µ L G G G or ³ ³ B B O/B O/B or ³ ³ O O O/B O/B ¸ µ µ L L L E E E ² ² ² E E ² ² LED Indication - 2nd Stage - Compressor - 2nd Stage Cool - X2 ¾ X2 ¾ X1 X2 º - - - - - - - - - - - - - - - X1 X2 - - - W2 · - - Y2 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. ¿ If provided on original equipment. ´ Terminal must be connected to the transformer common. ² If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B) terminal. ¶ Do not remove factory-installed jumper. º Optional Check LED on T8611G1004. See Fig. 26. ¾ Field-installed X2 to X (C) jumper. µ LED is energized when terminal is powered. ¸ L terminal is powered continuously when thermostat is in Em. Ht. position. M13219 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER) T874G1410/Q674F1311(6TH11703024) 70-6627 • 114
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