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Honeywell CT3300 Installation And Programming Instructions page 6

Weekday/weekend (5-day/2-day) programmable heat and/or cool low voltage (20 to 30 vac) thermostat and mounting plate
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Step 4. Set Thermostat for Your Type of Heating System
DISPLAY F
DISPLAY C
Fig. 8.
NOTE:
These DIP switches 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), turn DIP Switch 3 to Off position.
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 Step 7. To program the thermostat, see the Programming section.
69-1634—1
THERMOSTAT BACK
ON
1
1
3 - ON
2
2
3 - OFF
3
3
HEATING
SYSTEM
OFF ON
WARM AIR
FURNACE
HOT WATER OR
HIGH EFFICIENCY
ELECTRIC
FURNACE
FUEL SWITCH
F
E
C
DIP SWITCH
FUEL SWITCH
POSITION
POSITION
1 - ON
2 - ON
F
1 - OFF 2 - ON
F
1 - ON 2 - OFF
E
W
Y
G
W
Y
G
C
R
R
C
R
C
M20637
6
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 correct fan
operation.
b. Use DIP switches 1 and 2 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.

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