Honeywell RTH2310 User manual

Honeywell
Operating
Manual
RTH2310
Programmable Thermostat
69-2229ES-2

CAUTION: EQUIPMENT DAMAGE HAZARD
To prevent possible compressor damage, do not use Cooling mode when the outdoor
temperature is below 50 °F (10 X).
Need Help?
For assistance with this product please visit http://DIYthermostats.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.
© 2008 Honeywell International Inc. All rights reserved.

Table of contents
RTH2310 Programmable Thermostat
About your new thermostat
Thermostat features 2
Early Start 3
Compressor protection 3
Quick reference to controls 4
Quick reference to display 5
Quick start 6
Programming & Operation
Set the clock 7
Select system setting (Heat/Cool) 8
Select fan setting (Auto/On) 9
Using the schedule 10-13
Temporary schedule override 14
Permanent schedule override 15
Appendices
Filter replacement 16
Battery replacement 17
In case of difficulty 18
Customer assistance 19
Limited warranty 20
Your new thermostat is pre-programmed
and ready to got
Soo page 6 for quick start.

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
Backllt display Is easy to read
Displays ambient (measured) temperature at all times
One-touch access to setpoint temperature
• Energy Star® compliant to greatly reduce your heating/cooling expenses
Separate programmable weekday/weekend schedules (5+2 day programming)
Temporary and permanent override of schedule
Early Start ensures right temperature at the right time
Built-in compressor protection

RTH2310 Programmable Thermostat
Early Start
Early Start allows the thermostat to "learn" how long your furnace or air conditioner takes to reach the set
temperature. Simply program the desired times and desired temperatures into the schedule. The thermostat
will determine when to activate heating or cooling so that the desired temperature is attained at the desired
time.
Example: If you set the Wake time to 6 a.m. and the temperature to 70 °F (21 °C). the heat will come on
before the set time, so the temperature is 70 °F (21 °C) by the time you wake at 6 a.m.
Built-in compressor protection
Your thermostat has a feature that helps prevent damage to the compressor of your air conditioning. Because
damage can occur if the compressor is restarted too soon after shutdown, this feature forces the compressor
to wait 5 minutes before restarting. During the wait time, >$• flashes on the screen. When the safe wait time
has elapsed, the icon stops flashing and the compressor turns on.

Operating Manual
Quick reference to controls
Battery compartment (for 2 AA batteries)
Screen
Lit for 12 seconds when
you press the backlight
button or any other button
System switch Fan Switch Programming buttons
(see page 8) (see page 9) (see pages 12 & 13)
Tomperature buttons
Backlight button

Quick reference to display screen
RTH2310 Programmable Thermostat
Day
Time
Current period numbor
Appears when Ihe thermostat
is following the schedule (see
temporary override on page
14 and permanent override on
page 15)
Sotpoint indicator
Appears when the setpoint
temperature is displayed.
8nn
uu
MO
Replace batterlos
(see page 14)
I FILTER
Temperature
The ambient (measured)
temperature is normally
displayed. To view the
setpoint temperature, press
-';' or ■ once. The sotpoint
temperature will appear for
5 seconds.
Heating Is on
Cooling Is on *
Replace filter
(see page 14)
' •§■ flashes when the compressor protection is engaged (see page 3).

Operating Manual
This thermostat is ready to go
Simply perform the three steps below and the thermostat is in operation:
© Set the clock See page 7
© Select whether to heat or cool See page 8
© Select whether to keep the fan on continuously or only when needed See page 9
Your thermostat is pre-programmed with Energy Star® settings (see page 11). If you do not wish to use
these settings, you can:
► Modify the schedule and temperature setpoints See page 12
► Temporarily override the temperature setpoint See page 14
► Permanently override the temperature setpoint See page 15

RTH2310 Programmablo Thormostat
Set the clock
O Press Clk. The hour will flash.
© Press : or Q to set the hour.
© Press Clk. The minutes will flash.
© Press or ;. to set the minutes.
© Press Clk. The day will flash.
© Press or to set the day.
© Press Exit.
Time and day display
Press to start time and day setting
Press lo set the lime or the day
( ) Press to end lime and day selling
NOTE: The time display flashes when the clock has lost its settings

Operating Manual
Select the system setting
Heat Off Cool
QD
Use the System switch to place the system in one of the
following modes:
• Heat: System is in Heating mode.
• Off: System is off.
• Cool: System is in Cooling mode.
NOTE: When you place the thermostat in Cooling mode, you might need to wait up to
five minutes before cooling can start. This is a safety feature for the compressor. * will
flash on the screen until cooling starts.
A
CAUTION: EQUIPMENT DAMAGE HAZARD
Do not use Cooling mode when the outdoor temperature is below 50 °F (10 °C).

RTH2310 Programmable Thermostat
Select the fan setting
Aulo On
Fan
Use the Fan switch to select the fan mode of operation.
Auto * The fan runs only when heating or cooling is activated. However, if you have a gas or
fuel oil furnace, when heating is activated, the fan will start only when the air coming out
of the vents is warm enough. The fan will keep on running after heating stops until the
air is no longer warm enough.
On The fan is always running. Use this setting for improved air circulation or for more efficient
air cleaning.
NOTE: The Fan switch is not used if the fan is not connected to the thermostat.

Operating Manual
Save money by using the schedule
The thermostat automatically adjust its temperature setpoint according to the programmed schedule. You can
program up to four periods per day. with different settings for weekdays and weekends. For example, you can
program all four periods for the weekdays but only two periods (Wake and Sleep) for the weekends.
rft
a.YTt
Wake
Leave
Return
Sleep
Set the time you wake up and the temperature you want in the morning until you leave
(usually a comfortable level).
Set the time you leave home and the temperature you want while you are away (usually an
economical level).
Sot tho time you return home and the temperature you want during the evening until bedtime
(usually a comfortable level).
Set the time you go to bed and the temperature you want overnight (usually an economical
level).
To program a period, you need to set its start time and its two temperature settings (one when the thermostat is in
cooling mode and another one when it is in heating mode).
10

RTH2310 Programmable Thermostat
Energy Star3 settings
The thermostat is preset with Energy Star® settings. These settings can reduce your
energy bills by 33%. See the next page if you wish to modify the settings.
Period
Wake
Leave
Return
Sleep
Weekdays
Start time
6:00 am
8:00 am
6:00 pm
10:00 pm
Heat
70 °F (21 °C)
62OF(16.5°C)
70 °F (21 °C)
62°F(16.5°C)
Cool
78 °F (25.5 °C)
85 T (29.5 "C)
78 °F (25.5 °C)
82 °F (28 °C)
Weekends
Start time
6:00 am
--
--
10:00 pm
Heat
70 °F (21 °C)
--
--
62 °F (16.5 °C)
Cool
78 °F (25.5 °C)
--
--
82 °F (28 °C)

Operating Manual
To modify the schedule
O Press Pgm. The settings for period 1 for
Monday through Friday are displayed.
© Press Day to switch between mo tu we th
fr (Monday through Friday) and sa su
(Saturday and Sunday).
NOTE: Press Day for 3 seconds to select all
7 days.
© To select another period, press P# until the
desired period number is displayed.
NOTE: To skip the displayed period, press Clr.
For example, periods 2 and 3 have been skipped
for Saturday and Sunday in the default schedule.
Period Temperature
start time setpoint
6-00
•5.1fSU»H
Period
number
Program
days
Appears when
the heat setpoint
is displayed
Appears when
the cool setpoint
is displayed
12

RTH2310 Programmable Thermostat
To modify the schedule (cont'd)
While the time display is flashing, press i or
" to set the time (in increments of 15
minutes).
Press P#.
While the temperature display is flashing,
place the System switch on Heat and press
or to set the heat temperature. Place
the System switch on Cool and press or
to set the cool temperature.
Repeat steps 2 to 6 to set another period.
Press Exit.
n" Press to start programming
O or lo select another period
O Press lo select the days
Press lo set the time
or the temperature
Place on Heat when setting
~-~. the heal selpoint or on Cool
^—' when setting the cool setpoint
q Press to erase (skip) Ihe
displayed period
( ) Press to end programming
13

Operating Manual
Temporary override of schedule
To temporarily override the schedule, press © or Q until the
desired temperature is displayed. The period number will
flash to indicate that the current period has been overridden.
The new temperature will be used for the next 2 hours.
NOTE: Pressing ; or • once will display the setpoint
temperature. To change the setpoint temperature, press
either button more than once.
Press the Mode button if you wish to cancel the temporary
setting.
Press to set the
temperature
The period number flashes
when the schedule is
temporarily overridden
14

RTH2310 Programmable Thermostat
Permanent override of schedule
To permanently override the schedule, press the Mode
button so that the period number disappears. Press : or -
to manually set the temperature.
Press the Mode button again if you wish to cancel the
override and resume the schedule. The current period
number will appear and the thermostat will be set to the
temperature programmed for that period.
Press to permanently
override the schedule or
to cancel the override
Press to set the
temperature
10F
The period number disappears
when the schedule is
permanent/ overridden
15

Operating Manual
Filter replacement
After 500 hours of heating or cooling time, an icon appears to indicate that
the filter needs replacement. Once the filter is replaced, press the Filter but
ton for 3 seconds to remove the icon and reset the counter.
16

RTH2310 Programmable Thermostat
Battery replacement
Set the System switch to Off before removing the batteries. .„„... r...
Otherwise, the heating/cooling system might remain activated even O.
when batteries are removed.
Install two fresh AA batteries when the low-battery icon flashes on the
screen. The icon will flash for 120 days, then the thermostat will cut power to
the heating/cooling unit. The icon disappears once the batteries are
replaced.
Replace batteries once a year or before leaving home for more than a month.
After replacing the batteries, set the time and the day (see page 7). The other settings are
not erased when the thermostat is without power.
17

Operating Manual
In case of difficulty
Screen is blank.
Temperature settings cannot be
changed.
.}. is flashing.
HI appears on the screen.
LO appears on the screen.
Ensure two fresh AA alkaline batteries are
correctly installed.
You are setting the temperature outside its
allowable range:
• Heat: 41 °F to 82 °F (5 °C to 28 °C )
• Cool: 59 "F to 95 °F (15 °C to 35 °C)
The compressor protection delay is underway.
Wait for the delay to end (maximum of 5 minutes).
The ambient (measured) temperature is above
122°F(50°C).
The ambient (measured) temperature is below
23 °F (-5 °C).
18