Honeywell RTH6350 Series User manual

Operating
Manual
RTH6350/RTH6450/RET93E0/RET95E0 Series
Programmable Thermostat
69-2415ES-05

Read and save these instructions.
Need Help?
For assistance with this product please visit http://yourhome.honeywell.com
or call Honeywell Customer Care toll-free at 1-800-468-1502
® U.S. Registered Trademark.
US Patent No. D542,677 and other patents pending
Copyright © 2012 Honeywell International Inc. All rights reserved.
M28400
Quick Reference Card
Grasp and pull to see basic
operating instructions at a
glance.
Battery Holder
Press down and pull to
remove batteries.
Batteries should be
replaced once a year
(see page 15).
NOTE: Remove battery holder; model number is on the battery holder.
This manual covers the RTH6350, RTH6450, RET93E0, and RET95E0 models.

RTH6350/RTH6450/RET93E0/RET95E0 Series
1 69-2415ES—05
About your new thermostat
About your new thermostat
Thermostat features...................................2
Programming at a glance ..........................3
Quick reference to controls....................... 4
Quick reference to display ........................5
Programming & Operation
Set time and day........................................ 6
Select fan setting (auto/on) ......................7
Select system setting (heat/cool)..............8
Using program schedules .........................9
Program schedule overrides ...................13
Auto Changeover
(RTH6450 and RET95E0 only) .................15
Built-in compressor protection ............... 17
Smart Response®Technology .................18
Appendices
Battery installation................................... 19
Customer assistance ...............................20
In case of difficulty...................................21
Limited warranty ......................................23
This thermostat is ready to go!
Your new thermostat is pre-programmed
and ready to go.
See page 3 to check settings.
Table of contents

Operating Manual
69-2415ES—05 2
About your new thermostat
Congratulations on the purchase of your new Honeywell thermostat. It has been
designed to give you many years of reliable service and easy-to-use, push-button
climate control.
Features
• Easy-to-followmenuprogramming.
• One-touchtempcontroloverridesprogramscheduleatanytime.
• Large,clear,backlitdisplayiseasytoread—eveninthedark.
• Displaysbothroomtemperatureandtemperaturesetting.
• Removablebatteryholderforfast,easyreplacement.
• Built-incompressorprotection.

RTH6350/RTH6450/RET93E0/RET95E0 Series
3 69-2415ES—05
This thermostat is ready to go!
Your new thermostat is pre-programmed and ready to go. All you have to do is set the
time and day. Then check the settings below and change if needed:
1. Set time and day (required for proper operation).........................See page 6
2. Select fan setting (Auto/On): Preset to Auto.................To change, see page 7
3. Select system setting (Heat/Cool): Preset to Heat ......To change, see page 8
4. Program schedules: Preset to energy-saving levels
while you’re at work or asleep (assumes you wake at
6 am, leave at 8 am, return at 6 pm and go to bed
at 10 pm) ......................................................................To change, see pages 9-11
ONE-TOUCH TEMP CONTROL: You can override the program schedule at any time, and
manually adjust the temperature (see pages 12-13).

Operating Manual
69-2415ES—05 4
Quick reference to controls
M28401
Digital display (see page 5). Battery holder (see page 15).
Temperature buttons
Press to adjust temperature
settings (see pages 11-13).
Hold button
Press to override programmed
temperature control (see page 13).
Function buttons
Press to select the function displayed just above each button.
(Functions change depending on the task.)

RTH6350/RTH6450/RET93E0/RET95E0 Series
5 69-2415ES—05
Quick reference to display screen
Set Clock/Day/
Schedule
Auto
Wake Wed
Fan System
Heat On
Heat
Heat
Setting
Inside
AM
75
75
6:30
Replace Battery
M28402
In Recovery
Current inside temperature
Current program period
Wake/Leave/Return/Sleep
(see pages 9-11)
Set clock/day/schedule
Press to set time, day or
program schedules (see
pages 6 & 11)
Function buttons
Press the button beneath each function to view or change
settings (functions change depending on the task)
Low battery warning
(see page 15) Current time/day
(see page 6)
Temperature setting
(see pages 11-13)
System status
Onwhen“calling”for
heating or cooling;
flashes when waiting for
compressor restart (see
page 14)
System setting
Heat/Cool/Off
(see page 8)
Fan setting
Auto/On(seepage7)
Smart Response®
technology in effect
(see page 17)

Operating Manual
69-2415ES—05 6
M28404
Wed
Set Day Set Schedule
Done
PM
4:30
Set Clock/Day/
Schedule
Auto
Fan System
Heat
M28403
Set the time and day
1. Press the SET CLOCK/DAY/SCHEDULE
button, then press s or t to set
the clock time.
2. Press the SET DAY button, then
press s or t to select the day of
the week.
3. Press DONE to save & exit.
Note: If the SET CLOCK/DAY/SCHEDULE
option is not displayed, press DONE or
RUN SCHEDULE.
Note: If the display flashes Set Clock, the
thermostat will follow your settings for
theweekday“Wake”timeperioduntilyou
reset the time and day.
Press SET CLOCK/DAY/SCHEDULE, then adjust time
Press SET DAY, then select current day

RTH6350/RTH6450/RET93E0/RET95E0 Series
7 69-2415ES—05
Select the fan setting
Press the FAN button to select Auto or On.
In“Auto”mode(themostcommonlyused
setting), the fan runs only when the heat-
ingorcoolingsystemison.Ifsetto“On,”
the fan runs continuously.
M28405
Set Clock/Day/
Schedule
Auto
Fan System
Heat
M28406
Set Clock/Day/
Schedule
On
Fan System
Heat

Operating Manual
69-2415ES—05 8
Select the system setting
Press the SYSTEM button to select Heat, Cool or
Off.
• Heat: Thermostat controls only the heating
system.
• Cool: Thermostat controls only the cooling
system.
• Off: Heating and cooling systems are off.
• Auto (RTH6450 and RET95E0 only):
Thermostat automatically selects heating or
cooling depending on the indoor temperature.
CAUTION: EQUIPMENT DAMAGE
HAZARD. To prevent possible
compressor damage, do not operate
cooling system when outdoor
temperature is below 50 °F (10 °C).
Note: The Auto setting may not
appear, depending on how your
themostat was installed.
M28407
Set Clock/Day/
Schedule
Auto
Fan System
Heat
M28408
Set Clock/Day/
Schedule
Auto
Fan System
Cool