Pentax RTH221, RTH2300 Quick Installation Guide
69-2606ES-01
Quick Installation Guide
RTH2300/RTH221 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
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 heat pumps or on
multistage systems.
69 -26 06 ES—01 ii
Turn Off Power to Heating/
1
Cooling System
M28097
1 69-2606ES—01
Remove Old Thermostat
2
Remove old thermostat but leave wallplate with
wires attached.
Do not remove
wallplate yet
Old thermostat
69 -26 06 ES—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 69-2606ES—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 -26 06 ES—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 69-2606ES—01
Connect Wires
6
Simply match wire labels.
INSERT WIRES
AND TIGHTEN
SCREWS
WIRE
HOLE
LABELED
G
Y
W
WIRES
R
SCREW
W
Not
Used
M32732
Remove metal jumper if you have both R and Rc wires.
Labels don’t match? See page 20.
We are here to help.
Call 1-800-468-1502 for wiring assistance.
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Install Batteries
7
Install two AAA alkaline batteries.
RTHXXXX
Back of thermostat
7 69-2606ES—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
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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 69-2606ES—01
10
Turn the power back on to the heating/cooling system.
Turn Power Back On
M28098
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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 69-2606ES—01
Advanced Installation
Enter system setup ............................................................13
Changing settings ..............................................................14
Heating cycle rate ..............................................................15
Temperature display ...........................................................16
Compressor protection ......................................................17
Clock display ......................................................................18
Restore program schedule default ....................................19
Alternate wiring ..................................................................20
Troubleshooting ..................................................................21
Customer assistance .........................................................22
Limited warranty .................................................................23
RTH2300/RTH221
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 69-2606ES—01
Advanced Installation Guide
System setup
Changing Settings
See pages 15–19 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
5
5
M32779
Setting
69 -2 6 0 6 ES — 01 14
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