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®
MagicStat /3355
Programmable Thermostat by Honeywell
OWNER’S GUIDE
Weekday/Weekend (5-day/ 2-day)
Programmable Heat and/or Cool
Low Voltage (20 to 30 Vac)
Thermostat and Mounting Plate
Model CT3355
1
69-1012
69-1012
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Welcome to the world of comfort and energy RECYCLING THERMOSTAT savings with your new Honeywell MagicStat® Programmable Thermostat. If this thermostat is replacing a thermo- stat that contains mercury in a sealed Your new thermostat will automatically control tube, see Fig. 1, do not place your old the temperature in your home, keeping you thermostat in the trash. Contact your comfortable while saving energy when pro- local waste management authority for grammed according to the instructions in
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Table of Contents Step 1: Prepare For Installation ..................................................................................................... 4 Step 2: Remove Old Thermostat ................................................................................................... 6 Step 3: Install Batteries .................................................................................................................. 8 Step 4: Program Thermostat ...........................................
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Step 1: Prepare for Installation nn Check Table 1 to make sure this thermostat is compatible with your system. If not, return to the retailer. For more information, call Honeywell Customer Assistance, toll-free 1-800-468-1502. Table 1. Compatibility Chart. System Type Compatible With CT3355 Gas—Standing Pilot Yes Gas—Electronic Ignition Yes a, b Gas-Fired Boilers Yes Gas—Millivolt No a, b Oil-Fired Boilers Yes Oil-Fired Furnace Yes Electric Furnace Yes Electric Air Conditioning Yes Baseboard E
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nn Acquire tools and items below as needed. Also purchase two AA alkaline batteries; we recom- mend Energizer® batteries. CROSS-RECESSED
SCREWDRIVER HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED TO
DRILL HOLES IN WALL MASKING TAPE, IF
WIRE CUTTER/STRIPPER OR SHARP
NEEDED TO LABEL WIRES
KNIFE, IF NEEDED TO STRIP WIRES AS DISCONNECTED FROM
OLD THERMOSTAT LEVEL, IF NEEDED TO LEVEL
M878B THERMOSTAT FOR APPEARANCE 5 69-1012
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Step 2: Remove Old Thermostat nn Test to make certain that your heating and nn Disconnect wires from the old thermostat or cooling systems are working properly. If subbase. As you disconnect each wire, use either does not work, contact your local masking tape to label it with the old terminal heating/air conditioning dealer. To avoid designation. If there are only two wires, they compressor damage, do not operate the do not need to be labeled. If there is an extra cooling system when outdoor tem
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Replacing a Clock Thermostat that has C or C1 Clock Terminals? If you are replacing a Honeywell Chronotherm® such systems so return the product to the Thermostat, you can find one or two wires that place of purchase. If you would like information go to the C or C1 clock terminals on the about which programmable thermostats work Chronotherm® Thermostat wiring wallplate. Do with your system, call Honeywell Customer not allow them to touch, or you may damage Assistance at 1-800-468-1502. your trans
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Step 3: Install Batteries IMPORTANT Batteries must be installed for programming and operation of the thermostat and heating/cooling system. nn Purchase two AA alkaline batteries; non- alkaline batteries do not last as long, and can leak, causing damage to the thermostat or the wall surface. We recommend REMOVING
BATTERY
Energizer® batteries. DOOR M1719C nn Make sure the thermostat is set to the OFF position. As the batteries are running low, a bAt Lo nn Use a coin to remove the battery door.
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indicator eventually stops flashing. bAt Lo Press down on the left ends of the batteries to stays on without flashing, indicating the remove. If you insert the new batteries within thermostat and heating/cooling system 20 to 30 seconds of removing the old ones, have stopped working when the batteries you do not have to reprogram the thermostat. are almost completely dead. However, if the display is blank, the batteries are dead or incorrectly installed and you must After the batteries are comple
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while you get ready for work or school. When Step 4: Program Thermostat deciding what time to set for your WAKE period, After the batteries are installed, the thermostat include extra lead time, depending on the can be easily programmed in your hand, before outside temperature and your furnace response it is installed on the wall. time, to give the furnace a head start to heat the house before you get up. (This will be a higher If you prefer to program the thermostat after it temperature during
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to give the furnace a head start to heat the need to enter a time and temperature program house before you arrive home. (Again, this is for all periods if your schedule does not require higher heating or lower for cooling.) it. For example, a house that is occupied during weekdays would only require programs SLEEP is the time period you can set for an for WAKE and SLEEP. energy-saving temperature while you are sleeping. (Again, this is lower for heating or If no program is entered for the weeken
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Personal Programming Chart Heating Program 2 Weekdays Start Time Heating Temperature 1 WAKE LEAVE 1 RETURN SLEEP Weekends
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Cooling Program 2 Weekdays Start Time Heating Temperature WAKE 1 LEAVE RETURN 1 SLEEP Weekends
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This guide can be used for programming your new thermostat. NOTE: Batteries are required for operation and programming. When inserting batteries, set system switch to OFF. Remove the battery door (on the thermostat left side) using a coin at the bottom. Follow instructions on pages 8 and 9. Time Set Current Time/Day Ahead Set
To set the time, press and release once, then press until current time shows; to set Clock/Day the day, Time Back M1699A Ahead Set
Run
press and release
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p Time Temp Ahead Warmer Press to program WAKE time and press to program WAKE temperature for Back Cooler M1699A M1 00A Time Mon-Fri. Repeat sequence for LEAVE, RETURN, and SLEEP. Ahead Weekend Press until SAT SUN, WAKE and SET appear on the display. Press to program Schedule Back Temp M1699A Warmer WAKE time and to program WAKE temperature for Sat-Sun. Repeat sequence for SLEEP. Cooler M1 00A Cooling Program With system switch at COOL, follow the same instruct
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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 Temporarily Change temperature for current period only— press ; TEMPORARY indicator Cooler M1 00A Run
shows on display; canceling itself at the next scheduled change, or to cancel sooner press . Program p Temp Warmer Hold
Hold a temperature indefinitely (such as when on vacation)— press , then press ; Temp Run
Cooler HOLD appears on
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Weekday Weekend Check Programs— press , repeatedly to view each time and temperature; then Schedule Schedule Run
press . Program Weekday Weekend Clear Cancel a program— press , until program to cancel shows; then press . Schedule Schedule Usage Check Usage — Press for length of time heat or air conditioning has been running today since midnight; press again for yesterday’s usage, press again for cumulative; Run
Clear press
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Step 5: Adjust Fan Operation Switch, as Required your system is an electric heat system, set nn The thermostat fan operation switch, the switch to E. The E setting allows the fan labeled FUEL SWITCH (see illustration on to turn on immediately with the heating or page 20) is factory-set in the F position. This cooling in a system where the G terminal is is the correct setting for most systems. If connected. Step 6: Adjust System On-Time, °F/C°, as Required minimize room temperature swings. Setti
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First, turn in both screws completely, then IMPORTANT adjust for system type: When using a high efficiency furnace • Warm Air Furnace—Set at the Hot Water such as a 90% or greater AFUE setting (A—out one turn, B—leave in). (Average Fuel Utilization Efficiency) • Electric Furnace—Leave at the Warm Air unit, adjust screw A out one turn and Furnace setting (A—leave in, B—leave in). leave screw B in. NOTE: This thermostat does not have a nn The thermostat is set to read the tempera- setting for ste
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THERMOSTAT BACK A C ADJUST SCREWS THROUGH HOLES
DISPLAY °F
C–IN
TO SELECT OPERATION DESIRED DISPLAY °C C–OUT
FUEL SWITCH
1 TURN HEATING SYSTEM POSITION
WARM AIR
A–IN
B–IN
F
B D FURNACE
HOT WATER
A–OUT
B–IN
F
BOILER
1 TURN
ELECTRIC
A–IN B–OUT
E
FURNACE 1 TURN
W Y G FOR HIGH EFFICIENCY FURNACE (90%+ AFUE)
ADJUST: SCREW A–OUT ONE TURN
SCREW B–IN
FUEL SWITCH – F POSITION FUEL SWITCH F E Rc R M8796 20 69-1012
