Honeywell Heat/1Cool User Guide - Page 46
Function, Electromechanical, Chronotherm, Electronic Replacement or Upgrade, Chronotherm IV
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CARRIER USES HONEYWELL Q674L1116 (HH93AZ171) SUBBASE Electromechanical Chronotherm® III Electronic Replacement or Upgrade Chronotherm IV AVAILNAOBTLE AVAILNAOBTLE Q67T487F410D21216º5/ T8611M7008 T8511M1002 TT88661111MM22002157 W890P0CB8190000/2 Function Common · Existing Terminals C X1 C C C C Power R ¶ Compressor Y R R R R R ¶ ¶ Y1 Y Y1 Y1 Y1/W1 1st Stg. Heat 2nd Stage Compressor - ´ Y1 W1 - - - - W2 W2 Y2 Y2 W2 NOT AVAILABLE NOT AVAILABLE Fan G C/O Valve - Heat C/O Valve O Cool System Monitor/ L System Defrost EM. Heat E 2nd Stg. Cool - LED Indication - G G B B O ² X2 ² E Y2 ³ - O µ L E Y2 ³ X1 X2 » G ¿ O/B ¿ O/B ¾ L E - - G ¿ O/B ¿ O/B µ L E - X2 » G ¿ O/B ¿ O/B ¾ L E Y2 ³ - ³ Jumper Y2 to W2. · Terminal C (X1) must be connected to transformer common. » Optional CHECK LED on T8611M7008. Connect L to X1, jumper X2 to C. ¿ Configure O/B (select models) in Installer Setup. ´ In this application, auxiliary heat and compressor two are both connected to terminal Y1. ² For second stage compressor LED indication, jumper X2 to Y2 on Q674. For emergency heat LED indication, jumper X2 to E. For system monitor LED indication, connect L to X2. ¶ Both first stage heat and cool are connected to Y or Y1/W1 terminal. º When subbase system switch is in AUTO position, equipment operates in cool mode only. ¾ LED is energized when terminal is powered. µ L terminal is powered continuously when thermostat is in Em. Ht. position. M13149 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER) T874D1264/Q674L1116 (HH07AT173/HH93AZ171) 70-6627 • 44