Honeywell Ct3200a1001 1 Manual

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OWNER’S GUIDE
® U.S. Registered Trademark
Copyright © 2003 Honeywell International Inc.
All Rights Reserved 
CT3200 Programmable Thermostat
Welcome to the world of comfort and energy savings with your 
new Honeywell Programmable Thermostat. Your new thermostat 
will automatically control the temperature in your home, keeping 
you comfortable while saving energy. 
Weekday/Weekend (5-day/2-day)
Programmable Heat and/or Cool
Low Voltage (20 to 30 Vac)
Thermostat and Mounting Plate
Model CT3200...

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MERCURY NOTICEIf 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 You Have Correct Thermostat
Make sure that the CT3200 is the correct thermostat for your heating/cooling system. Read the compatibility chart 
below to determine which system you have. If your...

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 Step 1. Prepare for Installation
1.Carefully unpack your new thermostat. Save your receipt and make sure you have the following parts:
• Thermostat and mounting plate
• Labels
• Screws and anchors
• Installation and Programming Instructions
2.Gather the needed tools and supplies listed below.
3.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...

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 Step 2. Remove Old Thermostat
Fig. 2. 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 wiring meets any of 
the following conditions, see special wiring instruc-
tions section after Step 7.
Fig. 3. • The old thermostat is a clock...

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Step 3. Install Mounting Plate
Fig. 5. 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 mount-
ing plate is 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 cen-
ter of the mounting plate screw holes.
d. Remove the mounting plate and drill holes at the locations 
marked.
• For drywall, drill two 3/16-inch holes.
• For plaster...

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Step 4. Set Thermostat for Your Type of Heating System
I
M
P
O
R
T
A
N
T
: 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–electric.
NOTE:  This setting enables 
proper fan...

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Heating System Table
Step 5. Wire Thermostat Terminals
Type of SystemD I P  S w i t c h e s            
1 and 2 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
1–On; 2–OnF
High-efficiency furnace such as a 90% or greater AFUE (Average Fuel 
Utilization Efficiency) unit1–Off; 2–On F
Hot water boiler 1–Off; 2–On F
Electric furnace 1–On; 2–Off E
Fig. 9. a. Hold thermostat as shown...

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Step 6. Mount Thermostat
Fig. 11.  Fig. 12. e. Align the tabs at the top of the thermostat 
with the tabs at the top of the mounting 
plate (Fig. 11). 
f. Press the lower edge of the case to latch 
the bottom of the thermostat (Fig. 12)
M20130M20131 

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Step 7. Install the batteries
Special Wiring Instructions
Clock thermostat with C or C1 terminals
A clock thermostat has one or two extra wires attached to the C or C1 terminals that allow the clock to operate. These 
wires are not used during the installation of your new 3200 Thermostat and must be insulated from each other to avoid 
damaging your electrical circuit.
a. Make sure that power to the heating/cooling system is turned off.
b. Locate the wires that are connected to the clock...

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Six or more wires
If your old thermostat has six or more wires (excluding clock wires attached to the C or C1 terminals), your heating/
cooling system is most likely a variation of a heat pump or multistage system. Your 3200 Thermostat will NOT work 
with such systems and should be returned to the place of purchase. See the thermostat compatibility table for 
information about which programmable thermostat will work with your system.
Three thermostat wires
If you have three wires for heating...