Honeywell Heat/1Cool User Guide - Page 69
Function, Existing Control Terminal Designation, Electronic Replacement or Upgrade, Chronotherm IV
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Existing Control Terminal Designation HONEYWELL UNIVERSAL THERMOSTATS Electronic Replacement or Upgrade Chronotherm IV Q6300A1002 Q6300A1010 T8611R1000 T8611R1158 T8611G1004 T8T081011R11R0110406 T8T681611G12G0220802 W890P0CB8190000/2 Function Common · X X C B C C C C Power R R R R R R R R Compressor Y 1st Stage - Heat Auxiliary W2 Heat Y Y1 Y1 Y ³ ³ ³ W1 W1 W1 - W2 W2 W2 W2 Y ³ W1 W2 Y1 ³ W1 W2 Y1/W1 - ² Aux. Fan G G G G G C/O Valve B B B H B Heat G G G or » » B B O/B O/B C/O Valve O O O O O Cool O or » O O/B O/B » System Monitor/ L L º L º L º L º L Sytem Defrost ¶ L ¶ L Em. Heat E E E E E E E E Multiple - Heat Loads LED Indication - - ´ ´ ´ ´ ¿ - - - X1 X2 - ´ ´ ¿ X1 X2 - Defrost P - P - - - - - ² 2nd Stage - - - - - - - W2 Compressor 2nd Stage - - - - - - - Y2 Cool ¾ ³ Remove factory-installed jumper for independent first stage heat and cool operation. · Terminal must be connected to the transformer common. » Configure O/B (select models) in Installer Setup. ¿ Optional LED indication activated with completed circuit on X1 and X2 terminals. ´ If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B) terminal. ² When W2 is not used, configure W2 cycle rate to NC. ¶ LED is energized when terminal is powered. º L terminal is powered continuously when thermostat is in Em. Ht. position. ¾ If Y2 is used, T8611M may be used as replacement. M13244 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER T874R1491/Q674L1553 T874G1600/Q674F1428 T8085R1015/Q682L1010 T8300A1003/Q6300A1010 T8300A1011/Q6300A1002 T8300A1045/Q6300A1002 T8300A1029/Q6300A1036 T8300A1037/Q6300A1044 T8300B1001/Q6300B1000 T8611R1000 T8611G1004 70-6627 • 67
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