Honeywell CT3650 Manuel D’Utilisation

69-1285—2

8

All wiring must comply with local codes and ordinances. If 
unsure about household wiring procedures, call your local heat-
ing/air-conditioning contractor.

Refer to the labels you placed on the wires when you removed the old 
thermostat (see illustration).

❑

Match the letter of your old thermostat wire with the corresponding 
terminal letter on your new thermostat. Refer to Table 2.

❑

Remove the factory-installed jumper connecting terminals R and RC if 
wires are connected to both of those terminals.

❑

For wiring diagrams, if needed, see pp 21-22.

❑

Loosen the terminal screws. Slip each wire beneath its matching 
terminal. Wraparound and straight connections are both acceptable, 
(see illustration). Tighten the terminals.

❑

Plug the hole in the wall with insulation to help prevent drafts from adversely affecting thermostat operation.

M16425

R

W

Y

G

M4826

FOR WRAPAROUND 
INSERTION STRIP 
7/16 IN. (11 MM).

FOR STRAIGHT INSERTION 
STRIP 5/16 IN. (8 MM).