Honeywell Heat/1Cool User Guide - Page 42
Function, Electromechanical, Chronotherm, Electronic Replacement or Upgrade
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BARD Models: 24UHPQC, 30UHPQC, 42UHPQC, 48UHPQB, 48UHPQB-B, 48UHPQC-B, 60UHPQC-B Electromechanical Chronotherm® III Electronic Replacement or Upgrade Chronotherm IV T841A1712 Y594R1425 Y5Y9549G41G4174619 T8T681611G11R0100400 T8T481411R11R0120802 T8T581511G11G0140721 T8T081011R11R0110406 T8T681611G12G0220802 W890P0CB8190000/2 Existing Function Terminals Common ´ C or X X or X1 Power Rh or R R Rc Compressor Y Y 1st Stg. Heat - - Aux. Heat W2 W2 Fan G G C/O Valve or B W1 B Heat C/O Valve O O Cool System Monitor/ L System Defrost X R Y ² W1 W2 G B X R Y1 ² W1 W2 G B C R or Y1 Y ² W1 W2 G B O O O ¾ ¾ µ L X1 L C C C C C R R R R R Y ² W1 W2 Y1 ² W1 W2 Y ² W1 W2 Y1 ² W1 W2 Y1/W1 - Aux. · G G G ³ or B B O/B B ³ or O O O/B O G ³ or B O/B G ³ O/B or ³ O O/B ³ O/B µ ¾ µ L L L ¾ ¾ L L EM. Heat E E E E Multiple Aux. W3 W3 W3 W3 Heat Loads ¿ LED Indication - - X2 º X2 º 2nd Stage - - - - Compressor ³ Configure O/B (select models) in Installer Setup. · When W2 is not used, configure W2 cycle rate to NC. » If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B) terminal. ¿ Terminal is for multiple second stage heating loads such as contactors, sequencers, or relays. E E E E E E » » » » » » ¶ X1 X2 - - - X1 X2 - · - - - - - W2 ´ Terminal X (C, X1) must be connected to transformer. ² Do not remove factory-installed jumper. ¶ Optional CHECK LED on T8611G1004. See Fig. 26. º Field-installed X2 to X jumper (provided). ¾ LED is energized when terminal is powered. µ L terminal is powered continuously when thermostat is in Em. Ht. position. M13145 70-6627 • 40 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER T872N1036/Q672F1299 T874R1129/Q674L1181 T872N1164/Q672L1185 T874R1152/Q674L1207 T874N1024/Q674F1261
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