Pentax RTHL2410, RTHL2510 Installation Guide
69-2580ES-01
Quick Installation Guide
RTHL2510/RTHL2410 Series
Programmable Thermostat
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 for wiring
assistance before returning
the thermostat to the store.
This thermostat cannot be used on multistage
systems.
69 -258 0ES — 01 ii
Turn Off Power to Heating/
1
Cooling System
M28097
1 69-2580ES—01
Remove Old Thermostat
2
Remove old thermostat but leave wallplate with
wires attached.
Do not remove
wallplate yet
Old thermostat
69 -258 0ES — 01 2
Is there a sealed tube containing
mercury? If so, see back cover
for proper disposal instructions.
Cover
M28099
Label Wires with Tags
3
Label the wires using the supplied wire labels as you
disconnect them.
Wire Labels
M28093
3 69-2580ES—01
M28100
Separate Wallplate from
4
New Thermostat
Remove wallplate from the new thermostat and mount
onto wall.
TO REMOVE WALLPLATE
PULL HERE
M32731
Wallplate
69 -258 0ES — 01 4
Mount Wallplate
5
Mount the new wallplate using the included screws
and anchors.
Not
W/
Used
Aux
Drill 3/16-in. holes for drywall
Drill 3/32-in. holes for plaster
M32714
5 69-2580ES—01
Connect Wires
6
Simply match wire labels.
INSERT WIRES
AND TIGHTEN
SCREWS
WIRE
HOLE
LABELED
G
Y
W
WIRES
R
SCREW
Aux
Not
W/
Used
M32715
Remove metal jumper if you have both R and Rc wires.
Labels don’t match? See page 22.
Have a Heat Pump system? See page 23-24.
We are here to help.
Call 1-800-468-1502 for wiring assistance.
69 -258 0ES — 01 6
Install Batteries
7
Install two AAA alkaline batteries.
RTHXXXX
Back of thermostat
7 69-2580ES—01
M32707
Set fan operation switch
8
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.)
RTHXXXX
GAS OR OIL
ELECTRIC OR HEAT PUMP
GAS OR OIL
ELECTRIC OR HEAT PUMP
M32716
69 -258 0ES — 01 8
Install Thermostat onto Wallplate
9
Install thermostat onto the wallplate on the wall.
Not
W/
Used
Aux
Heat Off Cool Auto On
Fan
M32705
9 69-2580ES—01
10
Turn the power back on to the heating/cooling system.
Turn Power Back On
M28098
69 -258 0ES— 01 10
11
If your system type is...
If your system type is:
q Single Stage Heat and Cool
q Heat Only or Cool Only
Congratulations, you’re done!
If your system type is:
q Heat Pump* with Backup Heat
Continue with advanced installation
on next page 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 or
120/240 Volt systems.
11 69-2580ES—01
Advanced Installation
Enter system setup ............................................................13
Changing settings ..............................................................14
System type ........................................................................15
Heating cycle rate ..............................................................16
Early start ............................................................................17
Temperature display ...........................................................18
Compressor protection ......................................................19
Clock display ......................................................................20
Restore program schedule default ....................................21
Wiring conventional system ...............................................22
Wiring heat pump ...............................................................23
Troubleshooting ..................................................................25
Customer assistance .........................................................26
Limited warranty .................................................................27
RTH L2 510/RTHL 2410
System setup
Enter System Setup
To enter system setup, press and hold both the s and
t buttons until the display changes (approximately 5
seconds).
SETUP WIRING ASSISTANCE TROUBLESHOOTING
Heat Off Cool Auto On
Fan
M32713
13 69-2580ES—01
Advanced Installation Guide
System setup
Changing Settings
See pages 16–21 to change Function Settings.
SETUPWIRINGASSISTANCETROUBLESHOOTING
Change Function Change Setting
1. Press the s or t button to change the setting.
2. Press the s and t buttons simultaneously for one
second to advance to the next function.
3. Press the Run button to exit and save settings.
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
0
1
M32717
Setting
69 - 2 58 0 E S — 01 14
System setup
RTH L2 510/RTHL 2410
Function 1: System Type
0
1
M32718
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.
Press the s or t button to select the type of Heat/
Cool system you have in your home.
OR
Press to
change
setting.
AND
When finished,
press s and t
to advance to
the next function.
SETUP WIRING ASSISTANCE TROUBLESHOOTING
M32719
15 69-2580ES—01
Advanced Installation Guide
System setup
Function 5: Heating cycle rate
SETUPWIRINGASSISTANCETROUBLESHOOTING
5
5
M32720
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 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.
Press the s or t button to select your heating system
and optimize its operation.
Press to
change
OR
69 -2 58 0E S — 01 16
setting.
AND
When finished,
press s and t
to advance to
the next function.
M32719
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