Honeywell RTH6300B User manual

Operating
Manual
RTH6300B
Programmable Thermostat
69-1925EF-03

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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).

RTH6300B Programmable Thermostat
1 69-1925EF—03
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 .....................12
Built-in compressor protection ..................14
Appendices
Battery installation.....................................15
In case of difficulty .................................... 16
Customer assistance ................................18
Accessories/replacement parts.................18
1-year limited warranty..............................19
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

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
• Separatelyprogrammableweekday/weekendschedules.
• One-touchtempcontroloverridesprogramscheduleatanytime.
• Energy-savingsettingsformaximumcostsavings.
• 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.
Operating Manual
2

RTH6300B Programmable Thermostat
3 69-1925EF—03
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
69-1925EF—03 4
Quick reference to controls
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.)

RTH6300B Programmable Thermostat
5 69-1925EF—03
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
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)

Operating Manual
69-1925EF—03 6
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.
PM
4:30
Set Clock/Day/
Schedule
Auto
Fan System
Heat
Wed
Set Day Set Schedule
Done
Press SET CLOCK/DAY/SCHEDULE, then adjust time
Press SET DAY, then select current day

RTH6300B Programmable Thermostat
7 69-1925EF—03
Set Clock/Day/
Schedule
Auto
Fan System
Heat
Set Clock/Day/
Schedule
On
Fan System
Heat
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 heating
orcoolingsystemison.Ifsetto“On,”the
fan runs continuously. Use this setting for
improved air circulation, or for more efficient
air cleaning.

Operating Manual
69-1925EF—03 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.
Set Clock/Day/
Schedule
Auto
Fan System
Heat
Set Clock/Day/
Schedule
Auto
Fan System
Cool
CAUTION: EQUIPMENT DAMAGE
HAZARD. To prevent possible
compressor damage, do not operate
cooling system when outdoor
temperature is below 50°F (10°C).