MagicStat® CT3300 Programmable Thermostat
Welcome
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
Customer Relations at 1-800-468-1502.
to the world of comfort and energy savings
or call Honeywell
Installation and Programming Instructions
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/
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
17
®U.S. Registered Trademark
Copyright © 2001 Honeywell • All Rights Reserved
69- 0654- 5
Fig. 1
MERCURY
SWITCH
Recycling thermostat
If you are removing an old thermostat that contains mercury in a
sealed tube (Fig. 1),
place the old thermostat in the trash.
do not
Contact your local waste management authority for instructions
regarding recycling and the proper disposal of the old thermostat.
M3701
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.
Heating/cooling system
Conventional
Compatible
with CT3300?
Yes
Alternate
model
Single stage systems that include warm air furnaces and hot water.
Electric Baseboard
Electric powered heating strips located just above the floor, usually 120 to 240 volts.
Steam
No CT1950 for
240 volts
No CT3600
A steam boiler with radiator heat.
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
A heating or cooling system with more than one stage.
2
INSTALLATION 69-0654-5
No See your
contractor
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
• Labels
b. Gather the needed tools and supplies listed below.
Required tools and supplies Optional tools
• Two AA alkaline batteries. Honeywell recommends
Energizer® batteries.
• Screwdriver
• 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.
• Screws and anchors
• Installation and Programming Instructions
• Wire cutter/stripper or sharp knife
•Level
• Electrical tape
IMPORTANT:
temperature outdoors is below 50°F (10°C).
69-0654-5 INSTALLATION
To avoid damaging the compressor in the air conditioner, do not operate the cooling system when the
3
Step 2. Remove the old thermostat
y
Fig. 2
Fig. 3
Fig. 4
WIRES THROUGH
WALL OPENING
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
• There are extra wires that are
to the old thermostat.
connected to the old
not
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.
: Remember, if your old thermostat contains mercury, you
Note
must recycle it. See page 2 for more recycling information.
✓
Check
M20133
4
INSTALLATION 69-0654-5
Your wall should now look like Fig. 4.
our progress
Step 3. Install the mounting plate
Fig. 5
M20139
Fig. 6
M20129
Fig. 7
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.
R
Y
c
69-0654-5 INSTALLATION
W
R
G
M20128
5
Step 4. Set the thermostat for your type of heating system
)
)
Fig. 8
FOR HIGH EFFICIENCY FURNACE (90%+ AFUE)
ADJUST: SCREW A–OUT ONE TURN
SCREW B–IN
FUEL SWITCH – F POSITION
FUEL SWITCH
HEATING
SYSTEM TYPE
DISPLAY F
DISPLAY C
FUEL SWITCH
F
THERMOSTAT BACK
A C
C–IN
C–OUT
1 TURN
B D
IMPORTANT:
SELECTING ºF OR ºC
heating system allows it to maintain accurate temperature control,
minimize swings in the temperature of the room, and efficiently run
the fan.
ADJUST SCREWS THROUGH HOLES
TO SELECT OPERATION DESIRED
HEATING SYSTEM
WARM AIR
FURNACE
HOT WATER
BOILER
ELECTRIC
FURNACE
W Y G
A–IN
A–OUT
1 TURN
A–IN
B–IN
B–IN
B–OUT
1 TURN
FUEL SWITCH
POSITION
F
F
E
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:
b. Use the A and B screws on the back of the thermostat to set
E
R
Rc
your new thermostat for your type of heating system. See the
heating system table on the next page to find the correct
settings.
M20145
Note
heating system.
c. The thermostat is set to display the temperature in degrees
Fahrenheit (
degrees Celsius (
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.
Setting your thermostat correctly for your type of
This setting enables proper fan operation.
: These screws are factory-set for a warm air, gas, or oil
. If you want to display the temperature in
°F
, adjust screw C out one turn.
°C
6
INSTALLATION 69-0654-5
Heating system table
: Setting the screw “out one turn” means turning the screw 360° counter-clockwise, or one complete turn.
Note
Type of system Screws A and B Fuel switch
Warm air, gas, or oil heating system with an efficiency rating under 90%.
(The furnace efficiency rating should be on the furnace.)
Use factory setting
A–leave in
F
B–leave in
High-efficiency furnace such as a 90% or greater AFUE (Average Fuel
Utilization Efficiency) unit
Hot water boiler A–out one turn
A–out one turn
B–leave in
F
F
B–leave in
Electric furnace A–leave in
E
B–out one turn
Step 5. Wire the thermostat terminals
Fig. 9
Fig. 10
5/16 in.
(8 mm)
STRIP
R
INSERT
STRAIGHT
UNDER
SCREW HEAD
G
Y
W
M20125
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.
If the letters on the old thermostat terminals do not match
Note:
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
matching terminal (Fig 10).
d. Securely tighten the terminals.
END OF WIRE
VISIBLE HERE
69-0654-5 INSTALLATION
M20126
7
Step 6. Mount the thermostat
M20130
y
Fig. 11 Fig. 12
Step 7. Install the batteries
M20131
a. Align the tabs at the
of the mounting plate (Fig. 11).
top
of the thermostat with the tabs at the
top
b. Press the lower edge of the case to latch the bottom of the
thermostat (Fig. 12).
Fig. 13
IMPORTANT:
operation of the thermostat and heating/cooling system.
Batteries must be installed for programming and
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.
M1719C
REMOVING
BATTERY
DOOR
d. Replace the battery door.
e. Remove the clear plastic label from the digital display.
Fig. 14
✓
Check
our 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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