Quick Installation Guide
RTH7400/RTH7500 Series
Programmable Thermostat
69-2487EF-01
Advanced Installation Guide
Installation is Easy
Label wires and remove your old thermostat
Install and wire your new thermostat
Set your new thermostat to match your heating/cooling system
–This thermostat works with virtually all System Types
–It is preset for the most common system
We are here to help.
Call 1-800-468-1502 for wiring assistance before returning the thermostat to the store.
69-2487EF—01 ii
RTH7400/RTH7500 Series
1 |
Turn Off Power to Heating/ |
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Cooling System |
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M28097
1 69-2487EF—01
Advanced Installation Guide
2 Remove Old Thermostat
Remove old thermostat but leave wallplate with wires attached.
Leave wallplate in place
MERCURY NOTICE
Is there a sealed tube containing mercury? If so, see back cover for proper disposal instructions.
Old thermostat 
Cover
M28099
69-2487EF—01 2
RTH7400/RTH7500 Series
3 Label Wires with Tags
Label the wires using the supplied wire labels as you disconnect them.
M28100
Wire Labels
M28093
NOTE: Jumper wire used on old thermostat? If yes, note what letters the jumper connected and review in wiring section.
3 69-2487EF—01
Advanced Installation Guide
4 |
Separate Wallplate from |
New Thermostat |
Remove wallplate from the new thermostat and mount onto wall.
M28073
Wallplate
69-2487EF—01 4
RTH7400/RTH7500 Series
5 Mount Wallplate
Mount the new wallplate using the included screws and anchors.
M28094
Drill 3/32-in. holes for plaster Drill 3/16-in. holes for drywall
Use hammer to tap the anchors into the wall.
5 69-2487EF—01
Advanced Installation Guide
6 Connect Wires
Simply match wire labels.
CONVENTIONAL
SCREW
INSERT WIRES
THEN TIGHTEN SCREWS
LABELED WIRES |
CONVENTIONAL |
|
C
G
Y
W
RC
R
G
W
R
WIRE HOLE
W2
Y2
MCR28845
Remove metal jumper if you have both R and Rc wires.
Labels don’t match? See page 21.
Have a Heat Pump system? See pages 22–23.
We are here to help.
Call 1-800-468-1502 for wiring assistance.
69-2487EF—01 6
RTH7400/RTH7500 Series
7 |
Install Batteries |
Install two AA alkaline batteries and remove tab.
M28101
Back of thermostat
Remove tab.
M28102
7 69-2487EF—01
Advanced Installation Guide
8 Install Thermostat onto Wallplate
Install thermostat onto the wallplate on the wall.
M28103
69-2487EF—01 8
RTH7400/RTH7500 Series
9 Turn Power Back On
Turn the power back on to the heating/cooling system.
M28098
9 69-2487EF—01
Advanced Installation Guide
10 Set Time and Date
Press σ or τ to set month, then press NEXT. Press σ or τ to set day, then press NEXT. Press σ or τ to set year, then press DONE.
Month Year Day
6 |
2006 |
15 |
Go Back |
Next |
Done |
M28095
Press σ or τ to set time, then press DONE to save and exit.
10:10
Done
M28096
69-2487EF—01 10
RTH7400/RTH7500 Series
11 If your system type is...
If your system type is:
θ Single Stage Heat and Cool
Congratulations, you’re done!
If your system type is:
θMultistage Heat and Cool
θHeat Pump* without Backup Heat
θHeat Pump* with Backup Heat
θHeat Only
θCool Only
Continue with advanced installation
on next page to match your thermostat to your sytem 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 120/240 Volt systems.
11 69-2487EF—01
Advanced Installation |
|
System setup...................................................................... |
13 |
Wiring................................................................................... |
21 |
Troubleshooting.................................................................. |
24 |
Customer assistance.......................................................... |
26 |
Limited warranty................................................................. |
27 |
RTH7400/RTH7500 Series
AboutSystemyoursetupnew thermostat
Step 1
Press and release the left button.
0120 |
20 |
System & Fan Schedule |
Clock & More |
M27459
Step 2
Press and hold the center button until the screen changes (approximately 5 seconds).
System |
Fan |
Done |
M28069
SETUP
TROUBLESHOOTING ASSISTANCE WIRING
13 69-2487EF—01
SETUP
TROUBLESHOOTING ASSISTANCE WIRING
Advanced Installation Guide
AboutNavigatingyour settingnewthermostatchanges
Use this navigation to set and change settings on pages 15-20.
Press σ τ to change setting.
Function Setting
0120 |
20 |
Go Back Next |
Done |
Press NEXT to advance to |
Press DONE to save & |
next function. |
exit. |
NOTE: Some functions in the following pages may not appear due to previous selections made.
69-2487EF—01 14
RTH7400/RTH7500 Series
SystemAbout yoursetupnew thermostat
NOTE: If you set the time and date as shown on page 10, press NEXT to function 0170 and go to page 16.
See page 14 to navigate between functions.
Function
0120 Year Setting
(first two
digits)
0130 Year Setting (second two digits)
0140 Month Setting
0150 Date Setting
Settings & Options
Press σ/τ to change the first two digits of the year:
20= Year 20xx
21= Year 21xx
Press NEXT
Press σ/τ to change the last two digits of the year:
01 - 99 (i.e., 2001 - 2099)
Press NEXT
Press σ/τ to change the current month:
01 - 12 (i.e., January - December)
Press NEXT
Press σ/τ to change the current date:
01 - 31
Press NEXT
SETUP
TROUBLESHOOTING ASSISTANCE WIRING
15 69-2487EF—01
SETUP
TROUBLESHOOTING ASSISTANCE WIRING
Advanced Installation Guide
AboutSystemyoursetupnew thermostat
See page 14 to navigate between functions.
Function
0170 Select System
Type
Settings & Options
Press σ/τ to select your system type:
1Heat/cool: Gas, oil or electric heating with central air conditioning.
2Heat pump: Heat pump without backup or auxiliary heat.
3Heat only: Gas, oil or electric heat without central air conditioning.
4Heat only with fan: Gas, oil or electric heat without central air conditioning.
5Hot water heat only (no fan):
Gas, oil or hot water heat without central air conditioning.
6Cool only: Central air conditioning only.
7Heat pump: Heat pump with backup or auxiliary heating.
8Heat/Cool Multiple stages:
2 heat stages (wires on W and
W2), 2 cooling stages (wires on Y and Y2).
9Heat/Cool Multiple stages:
2 heat stages (wires on W and
W2), 1 cooling stage (wire on Y).
10Heat/Cool Multiple stages: 1 heat stage (wire on W), 2 cooling stages (wires on Y and Y2).
Press NEXT
69-2487EF—01 16
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