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