Honeywell MAGICSTAT CT3300 Installation And Programming Instructions page 7

Heating system table
Note: Setting the screw "out one turn" means turning the screw 360° counter-clockwise, or one complete turn.
Type of system
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 the thermostat terminals
Fig. 9
Fig. 10
5/16 in.
(8 mm)
STRIP
69-0654-5
M20125
INSERT
STRAIGHT
UNDER
SCREW HEAD
END OF WIRE
VISIBLE HERE
M20126
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.
Note: If the letters on the old thermostat terminals do not match
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.
Screws A and B Fuel switch
Use factory setting F
A–leave in
B–leave in
A–out one turn F
B–leave in
A–out one turn F
B–leave in
A–leave in E
B–out one turn
INSTALLATION
7