Honeywell Heat/1Cool User Guide - Page 97
Square D/sun Dial
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SQUARE D/SUN DIAL Electromechanical Chronotherm® III Electronic Replacement or Upgrade Chronotherm IV T841A1712 Y594R1425 Y5Y9549G41G4174619 TT88661111GR11000040 / T8T481411R11R0120802 T8T581511G11G0140721 T8T081011R11R0110406 T8T681611G12G0220802 W890P0CB8190000/2 Function Existing Terminals Common ¿ or C X X X X C C C C C C Power R Compressor Y 1st Stage - Heat Aux. Heat W2 R R R R R R R R R or Y Y Y1 Y1 Y Y Y1 Y Y1 Y1/W1 ² ² ² ² ² ² ² - W1 W1 W1 W1 W1 W1 W1 - · W2 W2 W2 W2 W2 W2 W2 W2 Aux. Fan G G C/O Valve B B Heat C/O Valve O O Cool System Monitor/ L System Defrost Em. Heat or K E E G G B B O O ᕨ L E E G G G G G G ³ or ³ or ³ B B B O/B B B O/B O/B ³ or ³ or ³ O O O O/B O O O/B O/B ¶ ¶ ᕨ ¶ ᕨ ᕨ L L L L L L E E E E E E Multiple Aux. W3 W3 W3 W3 ´ ´ ´ ´ ´ ´ Heat Loads » LED Indication - 2nd Stage - Compressor - X2 X1 X2 X1 X2 - - - - - - - - - X1 X2 - · - - W2 2nd Stage - - - - - - - - - Y2 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 must be connected to the transformer common. ´ If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B) terminal. ² Do not remove factory-installed jumper. ¶ L terminal is powered continuously when thermostat is in Em. Ht. position. ᕨ LED is energized when terminal is powered. M13201 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER) T841A1357 T841A1365 (121000012) 70-6627 • 95