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Honeywell MAGICSTAT 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 the thermostat for your type of heating system
Fig. 8
THERMOSTAT BACK
HEATING
SYSTEM TYPE
A
DISPLAY F
C–IN
DISPLAY C
C–OUT
1 TURN
B
FOR HIGH EFFICIENCY FURNACE (90%+ AFUE)
ADJUST: SCREW A–OUT ONE TURN
SCREW B–IN
FUEL SWITCH – F POSITION
FUEL SWITCH
E
F
FUEL SWITCH
6
INSTALLATION
SELECTING ºF OR ºC
C
ADJUST SCREWS THROUGH HOLES
TO SELECT OPERATION DESIRED
FUEL SWITCH
HEATING SYSTEM
POSITION
D
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
Rc
R
M20145
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.
69-0654-5

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