Quick Installation Guide
69-2340ES-01
RTH3100C
Heat Pump Non-Programmable Digital Thermostat
Installation is Easy
Label wires and remove your old thermostat
Install and wire your new thermostat
Set advanced settings
We are here to help.
Call 1-800-468-1502 for wiring
assistance before returning
the thermostat to the store.
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Turn Off Power to Heating/
M28097
1
Cooling System
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Remove Old Thermostat
M28099
2
Remove old thermostat but leave wallplate with
wires attached.
Is there a sealed tube containing
Leave wallplate
in place
Old thermostat
mercury? If so, see back cover
for proper disposal instructions.
Cover
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Label Wires with Tags
M28100
E
O
Aux
MCR29565
3
Label the wires using the supplied wire labels as you
disconnect them.
Wire Labels
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PULL HERE
HIPS
M29566
Separate Wallplate from
4
New Thermostat
Pull here to remove wallplate from new thermostat.
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Wallplate
Mount Wallplate
MCR29567
5
Mount the new wallplate using the included screws
and anchors.
Drill 3/16-in. holes for drywall
Drill 7/32-in. holes for plaster
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Connect Wires
MCR29568
6
Simply match wire labels.
Labels don’t match? See page 16.
We are here to help.
Call 1-800-468-1502 for wiring assistance.
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MCR29569
Install Batteries
7
Install two AA alkaline batteries.
Back of thermostat
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Install Thermostat onto Wallplate
MCR29570
8
Install thermostat onto the wallplate on the wall.
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Turn Power Back On
M28098
9
Turn the power back on to the heating/cooling system.
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10
Basic installation is...
Complete. Congratulations, you’re
done!
Continue with advanced installation
on page 12 to fine-tune your thermostat settings.
If you have questions, call us toll-free at
1-800-468-1502.
This thermostat works on 24 volt Heat Pump systems
with backup heat. It will NOT work on single-stage heat
and cool, 750 mV systems, or 120/240 Volt systems.
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Advanced Installation
System setup ......................................................................12
Wiring ..................................................................................16
Troubleshooting ..................................................................17
Customer assistance .........................................................19
Limited warranty .................................................................20
Advanced Installation Guide
MCR29571
Setup
6
5
MCR29572
System setup
Press and hold the s and t buttons until the screen
changes (approximately 5 seconds).
SETUPWIRINGASSISTANCETROUBLESHOOTING
Press t to change settings.
SettingFunction
Press and hold the s and
t buttons to exit and save
settings.
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Press s to advance
to next function.
RTH 3100C
Setup
6
5
MCR29572
MCR29573
About your new thermostat
Function 6: Auxiliary heat cycle rate
Press the t button to to select your auxiliary heating system and optimize its operation:
5 For gas or oil furnaces of less than 90%
efficiency
1 For steam or gravity systems
3 For hot water systems & furnaces of over 90%
efficiency
9 For electric furnaces
Press to change setting.
SETUP WIRING ASSISTANCE TROUBLESHOOTING
When correct setting is selected,
press to display next function.
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