User manual HONEYWELL CT2800

[. . . ] If you have questions, call Honeywell Customer Response Center at 1-800468-1502. MERCURY SWITCH MERCURY NOTICE Typical location of a mercury switch in a thermostat. M3701 2 69-1385 Contents Step 1. Prepare for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Remove Old Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Install Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] When pressing the keys, use the ball of your finger or a soft pencil eraser. Using sharp fingernails or pencil points can damage the keypad. If you make an error at any time during programming, just press the Run Program key, and continue again at the previous step in your sequence. 12 69-1385 Table 2. Days of Week Weekdays WAKE LEAVE RETURN SLEEP Weekendsb WAKE SLEEP a b Heating Program Start Time Heating Temperaturea The temperatures cannot be set any higher than 88°F (31°C) or any lower than 45°F (7°C). If you decide not to enter weekend programs, the thermostat operates on the weekday SLEEP program all weekend. 13 69-1385 . Table 3. Days of Week Weekdays WAKE LEAVE RETURN SLEEP Weekendsb WAKE SLEEP a b Cooling Program Start Time Cooling Temperaturea The temperatures cannot be set any higher than 88°F (31°C) or any lower than 45°F (7°C). If you decide not to enter weekend programs, the thermostat operates on the weekday SLEEP program all weekend. 14 69-1385 NOTE: Batteries are required for operation and programming. When inserting batteries, set the System switch to Off. Remove the battery door (on the thermostat left side) using a coin at the bottom. Also see the label inside the battery cover for abbreviated programming procedures for your thermostat. Set Current Time/Day Clock/Day Time To set time, press and release Time Clock/Day once, press until current shows. To set day, press and Run Program release again, press until current day shows; then press . Heating Program With System switch at Heat, press and release SET appear on display. Time TEMP Weekday once. Plug the hole in the wall with insulation to help prevent drafts from adversely affecting thermostat operation. INSERT STRAIGHT UNDER SCREW HEAD JUMPER (FACTORYINSTALLED). REMOVE IF 5-WIRE SYSTEM R M1712B M3002A 24 W Y G END OF WIRE VISIBLE HERE Rc 5/16 in. (8 mm) STRIP 69-1385 2-WIRE HEAT-ONLY (JUMPER INTACT) A C 4-WIRE HEAT/COOL (JUMPER INTACT) A C B D B D W Y G JUMPER W Y G JUMPER R Rc R Rc HEATING RELAY OR VALVE COIL L1 (HOT) L2 HEATING RELAY OR VALVE COIL 1 COOLING CONTACTOR COIL FAN RELAY 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. L1 (HOT) L2 M1709B 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M1710B 25 69-1385 5-WIRE HEAT/COOL (JUMPER REMOVED) A C 3-WIRE COOL-ONLY (JUMPER INTACT) A C B D B D W Y G W Y G JUMPER R Rc R Rc HEATING RELAY OR VALVE COIL FAN RELAY COOLING CONTACTOR COIL FAN RELAY 1 L1 (HOT) L2 1 COOLING CONTACTOR COIL L2 1 L1 (HOT) L2 L1 (HOT) POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. Mount Thermostat NOTE: To remove thermostat from wall, first pull out at bottom of thermostat, then remove top. A. ENGAGE TABS AT TOP OF THERMOSTAT AND SUBBASE. B. PRESS LOWER EDGE OF CASE TO LATCH. C. [. . . ] If desired, change the temperature setting. Allow time for the furnace to heat up and the fan to come on before checking for heat at the register. (Check to make sure system on-time is set correctly. See Step 6. ) The house is too warm or too cool. [. . . ]