Honeywell T8131A Owner's Manual page 25

Loosen the terminal screws and slip
each wire beneath its matching terminal.
See illustration (below) for proper wiring
technique. Securely tighten the terminals.
Plug the hole in the wall with insulation to
help prevent drafts from adversely
affecting thermostat operation.
PROPER WIRING TECHNIQUE
INSERT
STRAIGHT
5/16 IN.
UNDER
(8 MM)
SCREW HEAD
STRIP
END OF WIRE
VISIBLE HERE
M3825
25
M3002A
69-0887—1