Honeywell RTH2510 Series User manual

Owner’s Manual
Read and save these
instructions.
For help please visit
honeywellhome.com
RTH2510/
RTH2410 Series
Programmable
Thermostat
Heat Off Cool Auto On
Fan
Heat Off Cool
Auto On
Fan
Set
Hold
Run
Identify System Type
This thermostat is compatible with the following systems:
• Gas, oil or electric furnace
• Central air conditioner
• Hot water system with or without pump
• Millivolt system
• Central heating and cooling system
• Heat pump without auxiliary/backup heat
• Heat pump with auxiliary/backup heat

2
NOTICE: To avoid possible compressor damage, do not run air
conditioner if the outside temperature drops below 50°F (10°C).
CAUTION: MERCURY NOTICE
If this product is replacing a control that
contains mercury in a sealed tube, do not place
the old control in the trash. Contact your local
waste management authority for instructions
regarding recycling and proper disposal.
NO MERCUR
Y
NE PAS JETER
LE MERCURE
Hg
RTHXXXX
M32707
Customer Assistance
For assistance with this product, please visit
honeywellhome.com.
Or call Resideo Customer Care toll-free at
18004681502.
To save time, please note your model number
and date code before calling.
Pull at bottom to remove thermostat from
wallplate.
Turn thermostat over to find model number
and date code.
CAUTION: ELECTRONIC WASTE NOTICE
The product should not be disposed of with
other household waste. Check for the nearest
authorized collection centers or authorized
recyclers. The correct disposal of end-of-
life equipment will help prevent negative
consequences for the environment and human
health.
FCC statement at: https://customer.resideo.com/enUS/support/residential/
codes-and-standards/FCC15105/Pages/default.aspx

3
Installation
Installation.......................................................3
Advanced Installation ................................9
About Your New Thermostat
Controls and Home Screen
Quick Reference.........................................11
Preset EnergySaving Schedules......12
Programming and Operation
Setting the Clock.......................................12
Adjusting Program Schedules............13
Overriding Schedule Temporarily......14
Overriding Schedule Permanently..... 14
Compressor Protection ..........................15
Early Start......................................................15
Change Filter...............................................16
Replace Batteries ......................................16
Appendices
Troubleshooting.........................................17
Limited Warranty.......................................18
Table of Contents
1 Turn Off Power to Heating/Cooling System
or
M31535
Circuit breaker
box Heating/cooling system power switch

4
Do not remove wallplate yet
3 Label Wires with Tags
Label the wires using the supplied wire labels as you disconnect them.
Wire Labels
C
C
MCR33823
Terminal
designation
If you have an older thermostat with
a sealed mercury tube, turn to page
2 for proper disposal instructions.
Terminal designation
C
C
MCR31537
2 Remove Old Thermostat
Remove old thermostat but leave wallplate with wires attached.
4 Separate Wallplate from New Thermostat
Remove wallplate from the new thermostat and mount onto wall.
M32731
TO REMOVE WALLPLATE
PULL HERE
Wallplate
M28100

5
5 Mount Wallplate
Mount the new wallplate using the included screws and anchors.
Drill 3/16-in. holes for drywall
Drill 3/32-in. holes for plaster
6 Connect Wires
Simply match wire labels.
If labels do not match letters on the thermostat, check “Alternate Wiring
(Conventional Systems)” on page 6 and connect to terminal as shown (see
notes, below).
Maximum load: 1 A @ 24 Vac, 50/60HZ per output.
We are here to help. Call 18004681502 for wiring assistance.
W/
Aux
Not
Used
M32714
Remove metal
jumper if you
have both Rand
Rc wires.
G
R
W
Y
W/
AUX
Not
Used
SCREW
INSERT WIRES
AND TIGHTEN
SCREWS
WIRE
HOLE
LABELED
WIRES
M38703

6
Alternate Wiring (Conventional Systems)
If labels do not match letters on the thermostat, check the chart below and
connect to terminal as shown here (see notes, below).
If wires will be connected to both Rand Rc terminals, remove metal
jumper.
Do not use Cor X. Wrap bare end of wire with electrical tape.
If you have a heat pump without auxiliary/backup heat connect Oor B,
not both.
W/
AUX
Not
Used
M38704
O
Aux
GY
R
Alternate Wiring (Heat Pump)
If labels do not match letters on thermostat, see page 7.
B O G Y
W/
AUX
NOT
USED
R Rc
M32726
44

7
7 Install Batteries
Install two AAA alkaline batteries.
Back of thermostat
RTHXXXX
M32707
Alternate wiring (for heat pumps with auxiliary or backup heat only)
If labels do not match letters on the thermostat, check the chart below and
connect to terminal as shown here (see notes, below).
Leave metal jumper in place, connecting R& Rc terminals.
If your old thermostat had both Vand VR wires, stop now and contact a
qualified contractor for help.
If your old thermostat had separate Oand Bwires, wrap the B wire in
electrical tape and do not connect.
If your old thermostat had Y1, W1 and W2 wires, stop now and contact a
qualified contractor for help.
Do not use Cor Xwire. Do not use Bwire if you already have Owire. Wrap
bare end of wire with electrical tape.
Do not use Lwire. Wrap bare end of wire with electrical tape.
If your old thermostat had Eand Aux wires (or alternate wires), connect both
wires to Aux terminal.
5
6
M32728
2
7
4
AUX
W
W1
W2
F
BOG
H
C
RC
V
VR
B
X
R
M
Y1
Y
E
7
X
X2
L
F
6532
1
B O G Y
W/
AUX
NOT
USED
R Rc

8
8 Set Fan Operation Switch
Move the switch to the proper setting:
Gas or Oil: For gas or oil heating systems, leave
the fan operation switch in this factory-set
position (for systems that control the fan in a
call for heat).
Electric or Heat Pump: Change the switch
to this setting for heat pump or electric heat
systems. (This setting is for systems that allow
the thermostat to control the fan in a call
for heat, if a fan wire is connected to the G
terminal.)
9 Install Thermostat
Onto Wallplate
Install thermostat onto the wallplate on
the wall.
RTHXXXX
M32716
GAS OR OIL
ELECTRIC OR HEAT PUMP
GAS OR OIL
ELECTRIC OR HEAT PUMP
10 Turn Power Back On
Turn the power back on to
the heating/cooling system.
M31544
or
Circuit breaker box Heating/cooling system
power switch
W/
Aux
Not
Used
M33592
Heat Off Cool Auto On
Fan
Heat Off Cool
Auto On
Fan
Heat Off Cool Auto On
Fan
Heat Off Cool
Auto On
Fan
Set
Hold
Run

9
11 If Your System Type is...
If your system type is:
qSingle Stage Heat and Cool
qHeat Only or Cool Only
Congratulations, you’re done!
If your system type is:
qHeat Pump* with Backup Heat
Continue with Advanced Installation to match your thermostat to your system
type.
*Heat Pump—an air conditioner that provides cooling in the summer, and also
runs in reverse in the winter to provide heating.
If you are not sure of your system type or if you have other
questions, call us toll-free at 18004681502.
This thermostat works on 24 volt or 750 mV systems. It will NOT work on multi-
stage conventional systems.
Advanced Installation
Enter System Setup
To enter system setup, press and hold both
the sand tbuttons until the display
changes (approximately 5 seconds).
Changing Settings
1. Press the sor tbutton to change the
setting.
2. Press the sand tbuttons
simultaneously for one second to
advance to the next function.
3. Press the RUN button to exit and save
settings.
Function
Setting
M33593
Heat Off Cool Auto On
Fan
Heat Off Cool
Auto On
Fan
Set
Hold
Run
10
M33594
Set
Hold
Run

10
NOTE: If you do not press any button for 60 seconds while you are in the setup
menu, the thermostat automatically saves any changes made and exits the
menu.
Function
Description
Press the sor tbutton to Setting
1 select system type 0 Heating & cooling: Gas, oil or electric heating with
central air conditioning or heat pump without auxiliary/
back-up heat.
1 Heat pump with auxiliary/backup heat: Outside
compressor provides both heating and cooling.
5 select your heating system
and optimize its operation
5 Gas or oil furnace: Use this setting if you have a
standard gas or oil furnace that is less than 90%
efficient.
6 Electric furnace: Use this setting if you have any type
of electric heating system.
3 Heat pump, hot water or high-efficiency furnace:
Use this setting if you have a hot water system or a gas
furnace of greater than 90% efficiency.
2 Gas/oil steam or gravity system: Use this setting if
you have a steam or gravity heat system.
13 select Early Start 1 On
0 Off
14 select Fahrenheit or Celsius
temperature display
0 Fahrenheit temperature display (°F)
1 Celsius temperature display (°C)
15* select Compressor
Protection settings
1 On
0 Off
20 select clock display 0 12-hour display
1 24-hour display
21 select Change Filter Timer 0 Off
1 30 days
2 90 days
3 6 months
4 9 months
5 1 year
40 restore program schedule to
default settings
0 Off
1 On: Program schedule default settings are listed on
page 12.
* Compressor Protection: This feature forces the compressor to wait approximately 5 minutes
before restarting, to prevent equipment damage. During the wait time, the message “Cool On” or
“Heat On” is displayed on screen.
About Your New Thermostat
Your new Resideo thermostat has been designed to give you many years of
reliable service and easy-to-use, push-button climate control.
• Backlit display is easy to read
• Displays ambient (measured) temperature at all times
• One-touch access to setpoint temperature
• Preset program settings
• Temporary and permanent override of schedule
• Early start ensures the right temperature at the right time
• Built-in compressor protection