RTHL2310/RTHL221 Series
69-2577EF-03
Programmable Thermostat
Operating
Manual
This manual covers the following models:
RTHL2310
RTHL221
CAUTION: EQUIPMENT DAMAGE HAZARD.
To prevent possible compressor damage, do not operate cooling system when outdoor
temperature is below 50°F (10°C).
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
Read and save these instructions.
® U.S. Registered Trademark. Patents pending.
Copyright © 2013 Honey well International Inc. All rights reser ved.
Table of contents
RTHL2310/RTHL221
About your new thermostat
Thermostat features .................................... 2
Thermostat is preset, ready to go ............... 3
Quick reference to controls .........................4
Quick reference to display ...........................5
Appendices
Battery replacement .................................. 16
Customer assistance ................................17
In case of difficulty .............................. 18–19
Limited warranty ........................................ 20
Programming & Operation
Set time and day ......................................... 6
Select system setting .................................. 7
Select fan setting ........................................8
Using program schedules .....................9–10
Adjust program schedule (RTHL2310) .....11
Adjust program schedule (RTHL221) .......12
Program schedule overrides ...............13–14
Compressor protection ..............................15
1 69-2577EF—03
This thermostat is ready to go!
Your new thermostat is pre-programmed
and ready to go.
See page 10 to check settings.
Operating Manual
About your new thermostat
Your new Honeywell thermostat has been designed to give you many years of reliable
service and easy-to-use, push-button climate control.
Features
• Backlit display on RTHL2310
• Displays ambient (measured) temperature at all times
• One-touch access to setpoint temperature
• Preset program settings
• Temporary and permanent override of schedule
• Built-in compressor protection
69-2577EF—03 2
2
RTHL2310/RTHL221
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 system setting: Preset to Off ....................................To change, see page 7
3. Select fan setting: Preset to Auto .......................................To change, see page 8
4. Program schedules: Preset to energy-saving levels
while you’re at work or asleep........................................To change, see pages 9-12
ONE-TOUCH TEMP CONTROL: You can override the program schedule at any time, and
manually adjust the temperature (see pages 13-14).
3 69-2577EF—03
Operating Manual
M32700
Quick reference to controls
Set: Press to set time/
Screen Lit for 12 seconds when you press any button.
day/schedule.
Hold: Press to override
programmed temperature control.
Run: Press to resume
program schedule.
Heat Off Cool Auto On
System switch (see page 7)
• Heat: Heating system control.
• Off: All systems off.
• Cool: Cooling system control.
Fan Switch (see page 8)
On: Fan runs continuously.
Auto: Fan runs only when heating or cooling system
is on.
69-2577EF—03 4
Temperature
adjustment (see
page 13-14)
Fan
Lo
Quick reference to display screen
RTHL2310/RTHL221
Setpoint indicator
Appears when the
setpoint temperature
is displayed.
Current day/time
(see page 6)
Current program period
Wake/Leave/Return/Sleep
(see pages 9-10)
System status
Cool on: Cooling system is on.
Heat on: Heating system is on.
When Cool On is flashing, compressor protection is engaged (see page 15).
5 69-2577EF—03
6:30
We
Wake
Set
am
75
Heat
On
Low battery warning
(see page 16)
Batt
Temperature
The ambient (measured)
temperature is normally
displayed. To view the
setpoint temperature,
M32701
press the Up or Down
button once. The setpoint
temperature will appear for
five seconds.
Operating Manual
M32702
M32703
Set the time and day
Press SET, then adjust time.
Set Time
am
6:30
Press SET, then select current day.
Set Day
We
69-2577EF—03 6
1. Press the SET button, then press s or t
to set the clock time.
2. Press the SET button, then press s or t
to select the day of the week.
3. Press RUN to save & exit.
Note: If the clock flashes, the thermostat will follow
your settings for the Monday “Wake” time period
until you reset the time and day.
M32700
Select the system setting
RTHL2310/RTHL221
The SYSTEM switch can be set to control
your heating or cooling system, depending
on the season.
• Cool: Cooling system control.
• Off: All systems are off.
• Heat: Heating system control.
Heat Off Cool Auto On
Set SYSTEM switch to control the
heating or cooling system.
7 69-2577EF—03
Fan
CAUTION: EQUIPMENT DAMAGE
HAZARD. To prevent possible
compressor damage, do not operate
cooling system when outdoor
temperature is below 50°F (10°C).
Operating Manual
M32700
Select the fan setting
Set the FAN switch to 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.
Heat Off Cool Auto On
Fan
Set FAN switch to choose whether the fan
runs continuously or only as needed.
69-2577EF—03 8
RTHL2310/RTHL221
Save money by setting program schedules
It’s easy to program your system for maximum energy savings. You can program four time
periods each day, with different settings for weekdays and weekends.
9 69-2577EF—03
WAKE
6:00 am
°
70
LEAVE
8:00 am
°
62
RETURN
6:00 pm
°
70
SLEEP
10:00 pm
°
62
Set to the time you awaken and the temperature you want
during the morning, until you leave for the day.
Set to the time you leave home and the temperature you
want while you are away (usually an energy-saving level).
Set to the time you return home and the temperature you
want during the evening, until bedtime.
Set to the time you go to bed and the temperature you want
overnight (usually an energy-saving level).
Operating Manual
Energy saving settings for maximum cost savings
This thermostat is pre-set to use energy saving program settings. We recommend these
settings, since they can reduce your heating/cooling expenses. (See next page to adjust
times and temperatures of each time period.)
Cool (Mon-Fri)Heat (Mon-Fri) Heat (Sat-Sun) Cool (Sat-Sun)
Wake
(6:00 am)
Leave
(8:00 am)
Return
(6:00 pm)
Sleep
(10:00 pm)
69-2577EF—03 10
70
62
70
62
°
°
°
°
78
85
78
82
°
°
°
°
70
62
70
62
°
°
°
°
78
85
78
82
°
°
°
°
To adjust program schedules (RTHL2310)
M32706
RTHL2310/RTHL221
Press SET 3 times, then adjust time.
Set
am
6:30
Mo Tu We Th Fr
Wake
Set Schedule
Press SET, then set desired temperature.
11 69-2577EF—03
75
1. Press SET until Set Schedule is displayed.
2. Press s or t to set your weekday Wake time
(Mo-Fr), then press SET.
3. Press s or t to set the temperature for this
time period, then press SET.
4. Set time and temperature for the next time
period (Leave). Repeat steps 2 and 3 for each
weekday time period.
5. Press SET to set weekend time periods (Sa &
Su), then press RUN to save & exit.
Note: Make sure the thermostat is set to the system
you want to program (Heat or Cool).
Operating Manual
M32824
To adjust program schedules (RTHL221)
Press SET 3 times, then adjust time.
Set
am
6:30
Mo Tu We Th Fr Sa Su
Wake
Set Schedule
Press SET, then set desired temperature.
69-2577EF—03 12
75
1. Press SET until Set Schedule is displayed.
2. Press s or t to set your Wake time (Mo-Su),
3. Press s or t to set the temperature for this
4. Set time and temperature for the next time
5. Press RUN to save & exit.
Note: Make sure the thermostat is set to the system
you want to program (Heat or Cool).
then press SET.
time period, then press SET.
period (Leave). Repeat steps 2 and 3 for each
time period.
M32708
M32709
Program schedule override (temporary)
RTHL2310/RTHL221
Press to temporarily adjust temperature.
Temporary
Set
am
6:30
Wake
Press to cancel temporary setting and
resume program schedule.
6:30
Set
am
70
75
Note: Make sure the thermostat is set to the
system you want to control (heat or cool).
13 69-2577EF—03
Press s or t to immediately adjust the
temperature. This will temporarily override
the temperature setting for the current time
period.
“Temporary” will appear on the display and
the current program period will flash.
The new temperature will be maintained
only until the next programmed time period
begins (see page 9).
To cancel the temporary setting at any time,
press RUN.
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