Honeywell RTH7400 series Quick Start Guide

3
50 60 70 80 F
OFF
AUTO EM. HEAT
EM. HEATAUX. HEAT
50 60 70 80
MCR33835A
Remove old thermostat but leave wallplate with
wires attached.
2
Remove Old Thermostat
1
Turn OFF Power to Heating/
Cooling System
Is there a sealed tube containing
mercury? If so, see back cover
for proper disposal instructions.
Leave wallplate
in place
Old thermostat
Cover
or

Honeywell RTH7400 series Specifications

General

Display Type	Digital
Programmable	Yes
Program Periods Per Day	4
Wi-Fi Connectivity	No
Programmability	7-Day
Voltage	24V
Backlight	Yes
Power Source	Battery
Battery	AA
Temperature Range	40°F - 90°F