Honeywell Heat/1Cool User Guide - Page 63
Heatwave/southwest Mfg.
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HEATWAVE/SOUTHWEST MFG. Electromechanical Chronotherm® III Electronic Replacement or Upgrade Chronotherm IV T841A1712 Y594R1425 Y5Y9549G41G4174619 T8T6816111G1R0100400 T8T481411R11R0120802 T8T581511G11G0140721 T8T081011R11R0110406 T8T681611G12G0220802 W890P0CB8190000/2 Function Existing Terminals Common ¿ X X X X C C C C C C Power R R · Compressor Y Y 1st Stage - - Heat Aux. Heat W2 W2 R Y ´ W1 R Y1 ´ W1 R or Y1 Y ´ W1 W2 W2 W2 R Y ´ W1 R Y1 ´ W1 W2 W2 R Y ´ W1 W2 R R Y1 ´ W1 Y1/W1 - ¶ W2 Aux. Fan G G G G G G G G G G C/O Valve - B B B B ³ or B B O/B B ³ or ³ B O/B O/B Heat C/O Valve O O O O O ³ or O O O/B O ³ or O O/B ³ O/B Cool System - - L - L L L L L L Monitor EM. Heat E E E E E E E E E E Multiple Aux. - Heat Loads » LED Indication W3 W3 W3 - - - ² ² X2 X1 X2 X1 X2 - - - - - ² - X1 X2 - Defrost B - - - - - - - - - ¶ 2nd Stage - - - - - - - - - W2 Compressor 2nd Stage - Cool - - - ³ Configure O/B (select models) in Installer Setup. · Both first stage heat and cool are connected to Y terminal. » Terminal is for multiple second stage loads such as contactors, sequencers, or relays. ¿ Terminal X (C) must be connected to transformer common. - - - - - Y2 ´ Do not remove factory-installed jumper. ² Optional LED indication activated with completed circuit on X1 and X2 terminals. ¶ When W2 is not used, configure W2 cycle rate to NC. M13218 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER T872G1232/Q672F1224 T874G1105/Q674F1097 T874G1105/Q674F1170 70-6627 • 61