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Honeywell CT3300 Installation And Programming Instructions page 7

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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Heating System Table
Warm air, gas, or oil heating system with an efficiency rating under 90%.
(The furnace efficiency rating should be on the furnace.)
High-efficiency furnace such as a 90% or greater AFUE (Average Fuel
Utilization Efficiency) unit.
Hot water boiler
Electric furnace
Step 5. Wire Thermostat Terminals
Fig. 9.
Fig. 10.
INSERT
STRAIGHT
5/16 in.
UNDER
(8 mm)
SCREW HEAD
STRIP
END OF WIRE
VISIBLE HERE
Type of System
a. Hold thermostat as shown in Fig. 9.
b. Using the labels on the wires, match letter of your old thermostat wire
with the corresponding terminal on the back of your new thermostat.
NOTE:
M20125
c.
Loosen terminal screws and slip each wire beneath its matching
terminal (Fig 10).
d. Securely tighten terminals.
M20126
If letters on old thermostat terminals do not match letters on
new thermostat terminals, all old wires may not need connect-
ing to new thermostat. See Special Wiring Instructions section.
7
DIP Switches
1 and 2
Use factory setting
1–On; 2–On
1–Off; 2–On
1–Off; 2–On
1–On; 2–Off
Fuel Switch
F
F
F
E
69-1634—1

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