Honeywell Heat/1Cool User Guide - Page 118
Zone Aire
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ZONE AIRE VHP SERIES Electromechanical Chronotherm® III Electronic Replacement or Upgrade Chronotherm IV T841A1712 Y594R1425 Y5Y9549G41G4174619 T8T681611G11R0100400 T8T481411R11R0120802 T8T581511G11G0140721 T8T081011R11R0110406 T8T681611G12G0220802 W890P0CB8190000/2 Existing Function Terminals Common ᕤ X1 or 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 Y Y Y1 Y1 or Y Y Y1 Y Y1 Y1/W1 ¶ ¶ ¶ ¶ ¶ ¶ ¶ - W1 W1 W1 W1 W1 W1 W1 - ¾ Aux. Heat W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux. Fan G G C/O Valve B or W1 B Heat C/O Valve - O Cool System Monitor/ L System Defrost G G B B O O µ L G B O ¸ L G G ³ or B B O/B or ³ O O O/B ¸ µ L L G G ³ or B B O/B ³ or O O O/B ¸ µ L L G ³ O/B ³ O/B µ L Em. Heat E E E E E E E E E E Multiple Aux. W3 W3 W3 W3 ´ ´ ´ Heat Loads » LED Indication X2 - X2 ² X1 X2 · X1 X2 º - - 2nd Stage - - - - - - - Compressor ´ ´ ´ · - X1 X2 - ¾ - - W2 2nd Stage - - - - - - - - - Y2 Cool ³ Configure O/B (select models) in Installer Setup. · Optional LED indication activated with completed circuit on X1 and X2 terminals. » 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 Field-installed X2 to X (C) jumper. ¶ Do not remove factory-installed jumper. º Optional Check LED on T8611G1004. See Fig. 26. ¾ When W2 is not used, configure W2 cycle rate to NC. µ LED is energized when terminal is powered. ¸ L terminal is powered continuously when thermostat is in Em. Ht. position. M13221 TYPICAL THERMOSTATS AND SUBBASES-HONEYWELL MODEL NUMBER T874R1129/Q674L1181 T874N1024/Q674F1261 70-6627 • 116