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MagicStat® CT3300 Programmable Thermostat
Installation and Programming Instructions
Welcome to the world of comfort and energy savings with your new Honeywell MagicStat® Programmable Thermostat. Your new thermostat will automatically control the temperature in your home, keeping you comfortable while saving energy.
If you have any questions about using this thermostat, visit our home expert Web site at www.honeywell.com/yourhome or call Honeywell Customer Relations at 1-800-468-1502.
Weekday/Weekend (5-day/2-day)
Programmable Heat and/or Cool
Low Voltage (20 to 30 Vac)
Thermostat and Mounting Plate
Model CT3300
Table of Contents
Installation |
2 |
Programming |
11 |
Operation |
17 |
Change the clock for Daylight/ |
17 |
Standard Time |
|
Set the Fan and System switches |
17 |
Replace the batteries |
18 |
Override the program settings |
19 |
Frequently asked questions |
22 |
Limited 1-Year Warranty |
24 |
®U.S. Registered Trademark
Copyright © 2001 Honeywell • All Rights Reserved
690654- 5
Fig. 1
MERCURY
SWITCH
M3701
Recycling thermostat
If you are removing an old thermostat that contains mercury in a sealed tube (Fig. 1), do not place the old thermostat in the trash. Contact your local waste management authority for instructions regarding recycling and the proper disposal of the old thermostat.
Installation
Verify that you have the right thermostat
Make sure that the CT3300 is the right thermostat for your heating/cooling system. Read the compatibility chart below to determine which system you have. If your system is not compatible with the CT3300, the table recommends an alternate Honeywell model. If you are unsure what type of thermostat is right for your system, visit us on the Web at www.honeywell.com/yourhome or call Honeywell Customer Relations at 1-800-468-1502.
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Compatible |
Alternate |
Heating/cooling system |
with CT3300? |
model |
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Conventional |
Yes |
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Single stage systems that include warm air furnaces and hot water. |
|
|
|
|
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Electric Baseboard |
No |
CT1950 for |
Electric powered heating strips located just above the floor, usually 120 to 240 volts. |
|
240 volts |
|
|
|
Steam |
No |
CT3600 |
A steam boiler with radiator heat. |
|
|
|
|
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Heat Pump |
No |
CT3600 |
Heating and cooling are produced from the same outdoor unit (compressor) with no |
|
|
auxiliary or backup heat. |
|
|
|
|
|
Multistage Heat Pump |
No |
CT3611 |
Heating and cooling are produced from the same outdoor unit (compressor) with |
|
|
auxiliary or backup heat. |
|
|
|
|
|
Multistage Conventional |
No |
See your |
A heating or cooling system with more than one stage. |
|
contractor |
|
|
|
2 INSTALLATION |
69-0654-5 |
Step 1. Prepare for installation
a.Carefully unpack your new thermostat. Save your receipt and make sure you have the following parts:
• |
Thermostat and mounting plate |
• |
Screws and anchors |
• |
Labels |
• |
Installation and Programming Instructions |
b.Gather the needed tools and supplies listed below.
Required tools and supplies |
Optional tools |
||
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|
|
|
• |
Two AA alkaline batteries. Honeywell recommends |
• Wire cutter/stripper or sharp knife |
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Energizer® batteries. |
• |
Level |
• |
Screwdriver |
• |
Electrical tape |
•Hand or power drill with 3/16-inch or 7/32-inch drill bit
•Pencil
c.Make sure that your heating and cooling systems are working properly. If there is a problem with either system, call a heating/air conditioning contractor—the problem may persist after you install the new thermostat.
IMPORTANT: To avoid damaging the compressor in the air conditioner, do not operate the cooling system when the temperature outdoors is below 50°F (10°C).
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INSTALLATION 3 |
Step 2. Remove the old thermostat
Fig. 2
Fig. 3
Fig. 4
WIRES THROUGH WALL OPENING
M20133
M20140
M19086
a.Turn off power to the heating/cooling system, either at the furnace or at the fuse/circuit breaker panel.
b.Remove the cover of your old thermostat (Fig. 2).
c.Unscrew and remove the old thermostat’s mounting plate from the wall, but do not disconnect the wires.
d.Inspect the old thermostat wiring. If the wiring meets any of the following conditions, see the special wiring instructions on page 9.
•The old thermostat is a clock thermostat with wires attached to the C or C1 terminals.
•The old thermostat has 6 or more wires, excluding wires attached to C or C1 terminals.
•The old thermostat has 3 wires.
•There are 5 wires connected to the old thermostat.
•There are extra wires that are not connected to the old thermostat.
e.Using the enclosed labels, mark the wires with the letter of the terminal that it is attached to on the old thermostat (Fig. 3). Do not label the wires by color.
If the labels do not match the letters on the old thermostat terminals, see the wiring cross reference table on page 10.
f.Disconnect the wires from the old thermostat and wrap the wires around a pencil to keep them from falling back into the wall.
Note: Remember, if your old thermostat contains mercury, you must recycle it. See page 2 for more recycling information.
Check your progress
Your wall should now look like Fig. 4.
4 INSTALLATION |
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Step 3. Install the mounting plate
Fig. 5
M20139
Fig. 6
M20129
Fig. 7
Y |
R |
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R |
W |
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c |
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M20128 |
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G |
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a.Separate the mounting plate from the thermostat using a coin, as shown in Fig 5.
b.Position the mounting plate on the wall. Be sure the mounting plate sits flush against the wall and none of the wires are trapped behind it.
c.Level the mounting plate and use a pencil to mark the center of the mounting plate’s screw holes.
d.Remove the mounting plate and drill holes at the locations you marked.
•For drywall, drill two 3/16 inch holes.
•For plaster or wood, drill two 7/32 inch holes.
e.If installing in drywall, gently tap the anchors that were provided into the drilled holes until they are flush with the wall.
f.Reposition the mounting plate over the holes, pull the wires through the wiring opening, and loosely insert the mounting screws into each of the drilled holes or anchors (Fig. 6).
g.Make sure the mounting plate is level and tighten the mounting screws.
Check your progress
The mounting plate is now mounted on the wall and should look like Fig. 7.
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INSTALLATION 5 |
Step 4. Set the thermostat for your type of heating system
Fig. 8
|
THERMOSTAT BACK |
HEATING |
SELECTING ºF OR ºC |
SYSTEM TYPE |
|
A 
C
DISPLAY F C–IN
DISPLAY C C–OUT 1 TURN
B D
ADJUST SCREWS THROUGH HOLES TO SELECT OPERATION DESIRED
HEATING SYSTEM |
FUEL SWITCH |
||
POSITION |
|||
WARM AIR |
A–IN |
B–IN |
F |
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
R |
Rc |
M20145
FUEL SWITCH
IMPORTANT: Setting your thermostat correctly for your type of heating system allows it to maintain accurate temperature control, minimize swings in the temperature of the room, and efficiently run the fan.
a.Use the FUEL SWITCH on the back of the thermostat to set your new thermostat for the type of fuel that your heating system uses: F–gas or oil, or E–electricity.
Note: This setting enables proper fan operation.
b.Use the A and B screws on the back of the thermostat to set your new thermostat for your type of heating system. See the heating system table on the next page to find the correct settings.
Note: These screws are factory-set for a warm air, gas, or oil heating system.
c.The thermostat is set to display the temperature in degrees Fahrenheit (°F). If you want to display the temperature in degrees Celsius (°C), adjust screw C out one turn.
d.You can install the batteries and program your thermostat now, or you can wait until the thermostat is mounted on the wall. To install the batteries, see the instructions on page 8. To program the thermostat, see the instructions that begin on page 12.
6 INSTALLATION |
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Heating system table
Note: Setting the screw “out one turn” means turning the screw 360° counter-clockwise, or one complete turn.
Type of system |
Screws A and B |
Fuel switch |
|
|
|
Warm air, gas, or oil heating system with an efficiency rating under 90%. |
Use factory setting |
F |
(The furnace efficiency rating should be on the furnace.) |
A–leave in |
|
|
B–leave in |
|
|
|
|
High-efficiency furnace such as a 90% or greater AFUE (Average Fuel |
A–out one turn |
F |
Utilization Efficiency) unit |
B–leave in |
|
|
|
|
Hot water boiler |
A–out one turn |
F |
|
B–leave in |
|
|
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Electric furnace |
A–leave in |
E |
|
B–out one turn |
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Step 5. Wire the thermostat terminals
Fig. 9
G
Y
W
R
a.Hold the thermostat as shown in Fig. 9.
b.Using the labels on the wires, match the letter of your old thermostat wire with the corresponding terminal on the back of your new thermostat.
Fig. 10
INSERT
5/16 in.
STRAIGHT
(8 mm)
UNDER
STRIP
SCREW HEAD
END OF WIRE
VISIBLE HERE
M20126
Note: If the letters on the old thermostat terminals do not match the letters on the new thermostat terminals, you might not need to connect all of the old wires to the new thermostat. See the wiring cross reference table on page 10 for details.
c.Loosen the terminal screws and slip each wire beneath its
M20125 |
matching terminal (Fig 10). |
d.Securely tighten the terminals.
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INSTALLATION 7 |
Step 6. Mount the thermostat
Fig. 11 |
Fig. 12 |
a. Align the tabs at the top of the thermostat with the tabs at the |
|
|
top of the mounting plate (Fig. 11). |
|
|
b. Press the lower edge of the case to latch the bottom of the |
|
|
thermostat (Fig. 12). |
M20131
M20130
Step 7. Install the batteries
Fig. 13
|
REMOVING |
|
BATTERY |
M1719C |
DOOR |
Fig. 14
IMPORTANT: Batteries must be installed for programming and operation of the thermostat and heating/cooling system. Honeywell recommends using Energizer® batteries.
a.Make sure that the System switch is set in the OFF position.
b.Using a coin, open the battery door as shown in Fig. 13.
c.Install the batteries.
Make sure that the positive and negative terminals are oriented correctly as marked inside the battery case.
d.Replace the battery door.
e.Remove the clear plastic label from the digital display.
Check your progress
When the batteries are installed correctly, the digital display flashes all entries once, then begins to flash a default time and the current temperature (Fig. 14). The flashing continues until you begin to program the thermostat.
You are now ready to program the thermostat. Go to page 12.
8 INSTALLATION |
69-0654-5 |
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