Honeywell RTH2410 Series User manual

RTH2510/RTH2410
Programmable Thermostat
Quick Installation Guide
69-2421ES-03

69-2421ES—03 ii
Quick Installation Guide
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•
Do you need assistance?
We are here to help.
Call 1-800-468-1502.
This thermostat cannot be used on multistage systems.

1 69-2421ES—03
RTH2510/RTH2410
1Turn Off Power to Heating/
Cooling System
M28097

69-2421ES—03 2
Quick Installation Guide
M28099
Old thermostat
Cover
Remove old thermostat but leave wallplate with
wires attached.
Remove Old Thermostat
Do not remove
wallplate yet
MERCURY NOTICE
Do not put your old thermostat
in the trash if it contains
mercury in a sealed tube.
Contact your local waste
management authority for
instructions regarding recycling
and proper disposal.
2

3 69-2421ES—03
RTH2510/RTH2410
If any wires are not attached to your old thermostat or are
attached to a terminal marked Cor C1, they will not be
connected to your new thermostat. Wrap the bare metal
end of each of these wires with electrical tape, so it can-
not touch and short other wires.
Identify Wires
M29988
Disconnect wires and remove the old wallplate only after
all wires are labeled. Wrap the wires around a pencil to
prevent them from falling though the wall opening.
Do not use non-connected
wires.
Do not use C or C1 wires.
Identify and label each wire.
IGNORE WIRE COLORS:
Use terminal screw
designations to identify
wires.
3

69-2421ES—03 4
Quick Installation Guide
Mount New Wallplate
Loosen the locking screw at the bottom of the1. thermostat. Note that the screw is captive and cannot
be removed from the wallplate.
Separate the thermostat from the wallplate as per2. Figure 1.
Position the wallplate against the wall and mark hole3. positions with a pencil.
NOTE: Levelling is for esthetics only and will not affect
the performance of the thermostat.
Drill holes at the marked positions and insert supplied4. wall anchors.
Pass the wires through the large opening located at5. the bottom center of the wallplate as per Figure 2.
Secure the wallplate to the wall with supplied mounting6. screws as per Figure 3.
Connect the wires to the terminals.7.
4
Figure 1 Figure 2 Figure 3

5 69-2421ES—03
RTH2510/RTH2410
O/B Y RC R G W/AUX
M32148
A
REMOVE JUMPER
IF YOU HAVE BOTH
RAND RC WIRES
Match each labeled wire with the terminal having the1. same letter.
Connect Wires:
Conventional Systems
(typical wiring)
Loosen the terminal screws using a screwdriver, insert2. the wires, then tighten the screws.
Push any excess wire back into the wall opening.3.
Labels don’t match? See page 6.
Have a heat pump with auxiliary/backup heat, see pages 7-8.
•Call1-800-468-1502forwiringassistance
5

69-2421ES—03 6
Quick Installation Guide
Connect Wires:
Conventional Systems
(alternate wiring)
5
M32149A
REMOVE JUMPER BETWEEN RAND RC IF YOU HAVE
WIRES ON BOTH RAND RC.
DO NOT USE C, C1, OR X WIRE. DO NOT USE B WIRE
IF YOU ALREADY HAVE 0 WIRE. WRAP BARE END OF
WIRE WITH ELECTRICAL TAPE.
PLACE A JUMPER (PIECE OF WIRE) BETWEEN Y AND
W/AUX IF YOU ARE USING A HEAT PUMP WITHOUT
AUXILIARY/BACKUP HEAT.
1
2
3
O/B Y RC R G W/AUX
2 33
1
OR
C1
X
B
OR
B
H
OR
Y1
M
1
OR
RH
4
V
OR
F
OR
W1
H
1
OR
R

7 69-2421ES—03
RTH2510/RTH2410
Match each labeled wire with the terminal having the1. same letter.
Connect Wires: Heat Pump
Systems with Auxiliary/Backup
Heat (typical wiring)
Loosen the terminal screws using a screwdriver, insert2. the wires, then tighten the screws.
Push any excess wire back into the wall opening.3.
Labels don’t match? See page 8.
5
M32150A
O/B Y RC R G W/AUX

69-2421ES—03 8
Quick Installation Guide
Connect Wires: Heat Pump
Systems with Auxiliary/Backup
Heat (alternate wiring)
5
M32151A
O/B Y RC R G W/AUX
LEAVE JUMPER IN PLACE, CONNECTING R AND RC.
THIS THERMOSTAT CANNOT BE USED IF YOUR OLD THERMOSTAT
HAD ANY TWO OF THE FOLLOWING WIRES R, RC, V, OR VR.
DO NOT USE C OR X WIRE. DO NOT USE B WIRE IF YOU ALREADY
HAVE O WIRE. WRAP BARE END OF WIRE WITH ELECTRICAL TAPE.
DO NOT USE L WIRE. WRAP BARE END OF WIRE WITH ELECTRICAL
TAPE.
IF YOUR OLD THERMOSTAT HAD SEPARATE O AND B WIRES, 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.
IF YOUR OLD THERMOSTAT HAD E AND AUX WIRES (OR
ALTERNATE WIRES), CONNECT BOTH WIRES TO AUX TERMINAL.
1
2
3
4
5
6
7
7435
1
OR
X
X2
OR
F
OR
X
B
OR
B
H
OR
Y1
M
2
OR
RC
V
VR
OR
F
OR
W
W1
W2
6 7

9 69-2421ES—03
RTH2510/RTH2410
Set jumper JP1, on the back of the thermostat, if you
have connected a wire to the G terminal.
Set Heating Fan Control
6
HG Leave the jumper in this factory-set position if
you have a gas or oil furnace.
HE Place the jumper to this position if you have
an electric furnace.
JP1
Incorrect jumper setting: An incorrect setting is notice-
able in a gas or oil heating system. When heating starts,
you will initially feel cold air coming out of the vents as
the fan is running before the furnace has enough time to
heat up the air.

69-2421ES—03 10
Quick Installation Guide
Set jumper JP2, on the back of the thermostat, if you
have a heat pump.
Set Heat Pump Reversing Valve
7
O Leave the jumper in this factory-set position if
you have connected O wire to the O/B terminal.
B Place the jumper to this position if you have
connected B wire to the O/B terminal.
JP2
Incorrect jumper setting: The heat pump operation will
be reversed, i.e., it will cool in Heat mode and will heat in
Cool mode.

11 69-2421ES—03
RTH2510/RTH2410
Install 2 AAA batteries1.
on the back of the
thermostat.
Install Batteries and
Thermostat
8
M28098
Align the two brackets on2.
the top of the thermostat
with the corresponding
slots on the top of the
wallplate.
Push the thermostat3.
against the wallplate.
Tighten the screw at the4.
bottom of the thermostat.
Turn power back on5.
at the heating/cooling
system.

Advanced Installation
System setup......................................................................13
Temperature display...........................................................14
Time display format ...........................................................15
Heating cycles per hour.....................................................16
Compressor protection ......................................................17
Early start............................................................................18
System startup ...................................................................19
Customer assistance .........................................................20
Limited warranty.................................................................21

RTH2510/RTH2410
13 69-2421ES—03
About your new thermostat
WIRING ASSISTANCE TROUBLESHOOTING
System setup
Follow the procedure below to personalize and con-
figure the thermostat according to the heating/cooling
system.
Press and hold the1. s and tbuttons simultaneously
(for three seconds) until the display appears as
shown below.
Function number
Option number
Press the2. sor tbutton to change the option.
Press the3. s and tbuttons simultaneously for one
second to advance to the next function.
When the last function is displayed, press the4. s and
tbuttons to save any changes and exit the menu.
10
NOTE: If you do not press any button for 60 seconds
while you are in the setup menu, the thermostat auto-
matically saves any changes made and exits the menu.
At any time you can save the changes and exit by
pressing the Run button.

Advanced Installation Guide
69-2421ES—03 14
About your new thermostat
WIRINGASSISTANCETROUBLESHOOTING
Press the s or tbutton to select Fahrenheit or
Celsius temperature display.
Temperature display
0Fahrenheit temperature display (°F)
1Celsius temperature display (°C)
When correct setting is selected, press both s and t
to display next function.
10

RTH2510/RTH2410
15 69-2421ES—03
About your new thermostat
WIRING ASSISTANCE TROUBLESHOOTING
Press the s or tbutton to select 12-hour display or
24-hour display.
Time display format
012-hour display
124-hour display
When correct setting is selected, press both s and t
to display next function.
20

Advanced Installation Guide
69-2421ES—03 16
WIRINGASSISTANCETROUBLESHOOTING
When correct setting is selected, press both s and t
to display next function.
Heating cycles per hour
Note: Make sure system switch is in the heat position.
Press the s or tbutton to select your heating
system and optimize its operation:
512 min, Gas or oil furnace. Use this setting if you
have a standard gas or oil furnace that is less than
90% efficient.
230 min, Steam or gravity system. Use this setting if
you have a steam or gravity heat system.
320 min, Hot water or high-efficiency furnace: Use
this setting if you have a hot water system or a gas fur-
nace of greater than 90% efficiency.
415 min, Gas or oil furnace. Use this setting if you
have a standard gas or oil furnace that is less than
90% efficient.
610 min, Electric furnace: Use this setting if you have
any type of electric heating system.
35
2 to 6 cycles per hour

RTH2510/RTH2410
17 69-2421ES—03
WIRING ASSISTANCE TROUBLESHOOTING
When correct setting is selected, press both s and t
to display next function.
Compressor Protection
Press the s or tbutton to select compressor protec-
tion:
Damage can occur if the compressor is
restarted too soon after shutdown. This fea-
ture forces the compressor to wait 5 minutes
before restarting. During the wait time, the
message Cool On or Heat On flashes on the
screen. When the safe wait time has elapsed,
the message stops flashing and the compres-
sor turns on.
1On
0Off
41

Advanced Installation Guide
69-2421ES—03 18
About your new thermostat
WIRINGASSISTANCETROUBLESHOOTING
51
When correct setting is selected, press both s and t
to display next function.
Early start
Press the s or tbutton to select 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 tem-
peratures into the schedule. The thermostat
will determine when to activate heating or
cooling so that the desired temperature is
attained at the desired time.
1On
0Off