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¦ Can be programmed in hand (with batteries installed) or on the wall to provide up to four temperature periods per day. ¦ Large digital clock (liquid crystal display) indicates continuous time-of-day, day-of-week, current period and room temperature. ¦ Adaptive Intelligent Recovery™ brings room temperature to programmed temperature at programmed time, maximizing comfort and energy savings. ¦ Temperature control program maintains temperature within 1° F of setpoint. ¦ Temporary program override available by using— —WARMER and COOLER keys. —SKIP next period key. —CHANGE to last period key. ¦ HOLD TEMP key provided for indefinite program override (vacation/holiday). ¦ Installer self-test with time delay override saves installation time. ¦ SYSTEM light-emitting diode (LED) on thermostat indicates system is energized. ¦ AUX. HT., EM. HT., CHECK LEDs available on select models. ¦ Automatic heat/cool changeover. ¦ Batteries included provide power to maintain clock and memory during power failures. ¦ Switching subbase with wiring terminals included. ¦ Powered directly from control transformer. ¦ Model available with separate sensor for remote CONTENTS Specifications ................................................. 2 Ordering Information ..................................... 2 Selection/Application ..................................... 5 Installation ................................................... 12 Checkout ....................................................... 18 Programming The Thermostat ..................... 20 Operating The Thermostat ........................... 25 Operation ..................................................... 27 Troubleshooting ........................................... 29 Glossary ....................................................... 30 Table of Contents ......................................... 32 temperature sensing. C. H. • Rev. 10-92 • ©Honeywell Inc. 1992 • Form Number 68-0076—1 T8611M SPECIFICATIONS • ORDERING INFORMATION T8611M SPECIFICATIONS • ORDERING INFORMATION TRADELINE MODELS TRADELINE models are selected and packaged to replacement value. provide ease of stocking and handling and also maximum TRADELINE models available are listed in Table 1. TABLE 1—TRADELINE MODELS AVAILABLE. Thermostat Stages Changeover Type Switching Application ProgramHeat Cool System Fan T8611M* 3 2 Automatic EM. HT.-HEAT-OFFAUTO- COOL ON-AUTO Heat Pump 7-Day *Model available with separate sensor for remote temperature sensing. LIGHT-EMITTING DIODES (LEDs): SYSTEM LED (yellow) on thermostat lights during thermostat heating and cooling ON cycles. EM.HT. LED (red) on subbase lights when system switch is in EM.HT. On some systems, light may indicate need to switch to EM.HT. because of heat pump problem. AUX. HT. LED (green) on subbase lights when thermostat is calling for operation of auxiliary heat. CHECK LED (yellow) on subbase lights when an equipment or system problem needs to be checked. Consult heat pump literature to determine meaning. VOLTAGE RATING: 15 to 30 Vac. CURRENT RATING: 1.6A maximum, total per stage. OPERATING HUMIDITY RANGE: 5 to 90 percent relative humidity, noncondensing. OPERATING AMBIENT TEMPERATURE RANGE: 40° F to 110° F [4° C to 43° C]. SET POINT RANGE: 45° F to 88° F [7° C to 31° C]. CALIBRATION: Self-calibrating thermostat and thermometer to ±1° F. SHIPPING TEMPERATURE: -20° F to +120° F [-29° C to +49° C]. CYCLES PER HOUR ADJUSTMENT: Auxiliary heating—factory-set at 3 cph (adjustable to 6 cph for special systems); minimum off-time of five minutes. Nonauxiliary heating and cooling—factory-set (not field adjustable); minimum off-time of five minutes. FINISH: Beige matte with decorative brushed metal face plate. DIMENSIONS: Thermostat (mounted on subbase)—7 in. [178 mm] long, 5-5/16 in. [135 mm] high, 1-3/4 in. [44 mm] deep. See Fig. 1 for subbase dimensions. See Fig. 2 for remote sensor dimensions. TYPICAL KEYPAD: See Fig. 3. REPLACEMENT PARTS: 202905AA Remote Temperature Sensor. 220529 Replacement Door. AAA alkaline batteries, available locally. ACCESSORIES: 193121A Cover Plate Assembly. Includes cover plate, adapter ring and screws; 6-9/10 in. x 4-3/4 in. [175 mm x 121 mm]. Covers marks left by old thermostat. Allows mounting on vertical or horizontal outlet box. TG512 Universal Thermostat Guards. Includes clear or opaque plastic or metal cover, ring base, opaque plastic wallplate, tumbler lock with two keys. TG586A Locking Cover. Ordering Information When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE Catalog or price sheets for complete ordering number, or specify— 1. Model number. 3. Remote temperature sensing, if desired. 2. Number of heat and cool stages desired. If you have additional questions, need further information or would like to comment on our products or services, please write or phone: 1. Your local Honeywell Home and Building Control Sales Office (check white pages of your phone d...