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Weekday/Weekend (5-day/2-day)
PROGRAMMABLE
Programmable Heat and/or Cool
Low Voltage (20 to 30 Vat)
THERMOSTAT
Thermostat and Mounting Plate
Model CT2400
BY HONEYWELL
PROGRAMMING AND INSTALLATION
INSTRUCTIONS
Limited One-Year Warranty
Honeywell warrants this prcduct, excluding battery, to be free from defects in the workmanship or materials, under normal use and sewice,
for a pericxl of one (1) year from the date of purchase by tha consumer. If, at any lime during the warranty period, the produc
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Welcome to the world of comfort and @ RECYCLING THERMOSTAT energy savings with your new Honeywell MagicStat@ programmable thermostat. If this thermostat is replacing a thermostat Your new thermostat will automatically that contains mercury in a sealed tube (see control the temperature in your home, illustration below), do not place your old keeping you comfortable while saving energy thermostat in the trash. Contact your Jocal waste when programmed according to the instruc- management authority
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~ Prepare For Installation ❑ Check Table 1 to make sure this thermostat is compatible with your system. If it is not, return to retailer. For more information, call Honeywell Customer Assistance, toll-free 1-800-468-1502. TABLE 1 -COMPATIBILITY CHART. Compatible With CT2400 System Type Yes Gas-Standin~ Pilot Gas-Electro~c Ignition EA A Gas-Fired Boilers Gas—Millivolt Y:AA Oil-Fired Boilers Yes OWired Furnace Yes Electric Furnace Yes Electric Air Conditioning No Baseboard Electric (120/240 Line V
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_ Install The Batteries A IMPORTANT: Batteries must be installed for programming and operation of the thermo- stat and heating/cooling system. ❑ Purchase two AA alkaline batteries; non- alkaline batteries will not last as long, and may leak, causing damage to thermostat or wall surface. We recommend Energizer batteries. �l Make sure the thermostat is set in the OFF M1779B \ position. As the batteries are running low, a “bAt Lo” El Use a coin to remove battery door. indicator will flash for one t
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sleeping. (Again, lower heat or higher cool. require it. For example, a house that is occu- For more comfortable sleeping, some pied during weekdays would only require people choose not to raise the cool tem- programs for “WAKE and “SLEEP.” perature during the night.) If no program is entered for the weekends, the You will set one schedule for weekdays and thermostat will operate on the weekday another for weekends, because your require- “SLEEP program all weekend. ments will probably be differe
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COOLING PROGRAM Weekdays Start Time Cooling Ternperature~ WAKE LEAVE RETURN SLEEP Weekends~ WAKE SLEEP ~ If you decide not to enter weekend programs, SLEEP from the weekday program will copy to the weekend schedule. 0 ~ The temperatures cannot be set any higher than 88° F [31 C] or any lower than 45° F [7° C] NOTE: If you decide not to program the thermostat, it will automatically control heating at 68° F [20° C], and cooling at 78° F [26° C], 24 hours a day. 11 .— — ——- This guide can be used
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—-. A quick guide for operating or making changes follows: NOTE: System switch must be set to Heat or Cool to perform the following: Temp — Warmer u Temporarily Change Temperature for Current Period Only— . Temporary indicator will Cmlar n show on display; it will cancel itself at next scheduled change. To cancel sooner, press P~& o Temp Warmaf u Hold a Temperature Indefinitely— ~~~P , ; press pJ& to cancel. 0 n Coobr 0 14 .— . -- - (If using Temporarily Change or Hold, Check Current Temperature
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NOTE: This thermostat does not have a setting for steam/gravity air. Cycles would not be long enough for accurate temperature control. IMPORTANT: When using a high THERMOSTAT BACK efficiency furnace such as a .---——— Trcl--- .-:-:----------------–– ~-------, 1 -- ..: ,:. . 90 percent or greater Average 1 1 Fuel Utilization Efficiency 1 1 (AFUE) unit, adjust screw A 1 1 OUT ONE TURN and screw 1 1 B IN. t ““’::’’mml .,W Y G,,’ ; E ;5, ;&:%_& ; 1 [G- I r- FUEL SWITCH -A F~IE “ :--- - ~ : 1 Rc : IR
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_ Mount The Thermostat C. SWING COVER OPEN A. ENGAGE TABS AT TOP OF THERMOSTAT AND MOUNTING PLATE. ;;~;f;;N. ~ B. PRESS LOWER EDGE OF CASE TO LATCH. . >-/ ,., ~ -— J,(4 T I i/ I I A NOTE: To remove thermostat from wall, first pull out at bottom of thermostat, removing top last. *4 — —. —— — _ Mount The Thermostat c. A. ENGAGE TABS AT TOP OF THERMOSTAT AND MOUNTING PLATE. B. PRESS LOWER EDGE OF CASE TO blTCH. -. 1 . >-, ,., = / -– J,(4 + NOTE: To remove thermostat from wall, first pull out at bot
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— Move the system switch to COOL COOLING and the fan switch to AUTO. To avoid possible compressor damage, do not operate the cooling system when outside temperature is below 50° F [1 O“ C]. See compressor manu- Temp Press key until setting is about 10° facturer instructions for further F [6° C] below room temperature. Coolar information. The cooling equipment and fan n should start. NOTE: When cooling setting is Temp Press key until the setting is about changed, thermostat may delay 10° F [6° C]
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Troubleshooting Guide THEN... IF... Set the system switch to OFF. Remove batteries. Display will not come on. Insert batteries backward for at least five seconds to reset thermostat. Replace batteries correctly. Display should come on. Make sure batteries are fresh and installed correctly. Gently clean battery contacts using a soft pencil eraser. Do not use anything abrasive on clips. You have reached the temperature setting limit. Temperature display will not go lower The setting range is 45° F
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— ■ Readjust system on-time according to instructions on The furnace cycles too frequently, pages 16 and 17. or the system cycle length is too short or too long. ■ Check that the wiring hole in the wall behind the The thermostat current wallplate has been plugged with insulation to setting does not mstch the prevent drafts that might adversely affect display temperature to within t 10. thermostat operation. ■ Be aware that it is normal for the current setting and display temperature to differ on
