Honeywell RTH7400D Thermostat User Manual

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RTH7400D  
Programmable Thermostat  
OWNER’S GUIDE  
The RTH7400D Thermostat provides electronic control of 24 Vac  
heating and cooling systems or 750 mV heating systems.  
For assistance with your Honeywell product, please visit  
www.honeywell.com/yourhome or call Honeywell Customer Care  
toll free at 1-800-468-1502.  
Read and Save these Instructions  
Patents Pending  
®
©
U.S. Registered Trademark  
2004 Honeywell International Inc.  
All Rights Reserved  
69-1726-1  
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Contents  
Prepare for Installation ............................................................ 3  
Follow Important Instructions ..................................................5  
Remove Old Thermostat......................................................... 6  
Follow Special Instructions......................................................7  
Label Old Thermostat Wires ................................................... 10  
Mount New Wallplate to Wall ..................................................11  
Connect Wires to New Wallplate............................................. 15  
Install Batteries........................................................................ 23  
Attach New Thermostat to Wallplate....................................... 24  
Configure Installer Setup......................................................... 26  
Customer Assistance .............................................................. 62  
Limited One-Year Warranty..................................................... 63  
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Step 1. Prepare for Installation  
1
.
Check that the following items are included:  
WALLPLATE  
THERMOSTAT  
MOUNTING SCREWS (2)  
AND WALL ANCHORS (2)  
OWNER'S GUIDE  
WIRE LABELS  
CAUTION CARD  
OWNER'S GUIDE  
CAUTION  
TURN OFF POWER to system at the furnace, or at the fuse/circuit  
breaker panel before you begin.  
Match the letter of your old thermostat wire with the terminal of the  
corresponding letter on your new thermostat or base.  
ÓN  
Mon  
fusibles-interruptor té  
B
G
R
B
G
R
Y2  
H
C
L
E
O
F
F
P
H
P
RC  
W
RH  
W1  
X2  
T
U
U
V/VR V/VR  
X
W2  
W3  
Y1  
W3  
Y1  
Read and save these instructions  
ell.com/yourhome  
M22278  
If any of the items shown above are missing, call  
Honeywell Customer Care at 1-800-468-1502  
before returning the thermostat to the store.  
3
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Step 1. Prepare for Installation (Cont)  
2
.
Check that you have everything required for the  
installation:  
Two AA alkaline batteries  
No. 2 Phillips screwdriver and standard pocket  
screwdriver  
Drill  
Drill bit—use 3/16 in. for drywall; use 7/32 in. for  
plaster  
Level (optional)  
Hammer  
Pencil  
Electrical tape  
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Step 2. Follow Important Instructions  
1
.
Do not connect the wires to the new thermostat  
based on wire color because damage can occur to  
the heating and/or cooling system.  
These Installation Instructions explain later how to  
use the enclosed wire labels to correctly mark the  
wires connected to your old thermostat.  
OLD THERMOSTAT  
YELLOW  
WHITE  
Y
W
!
RED  
DO NOT WIRE  
NEW THERMOSTAT  
BASED ON  
G
GREEN  
WIRE COLOR.  
R
RC  
ORANGE  
M22034  
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Step 3. Remove Old Thermostat  
1
.
Turn off power at the heating and/or cooling system  
or fuse/circuit breaker panel.  
2
3
.
.
Remove the cover from the old thermostat.  
Remove the old thermostat from the wall or wall-  
plate. Do not remove the wires.  
OLD THERMOSTAT  
WALLPLATE  
Y
W
THERMOSTAT  
COVER  
G
R
C
M22036  
MERCURY NOTICE  
If you are replacing a thermostat that contains mercury  
in a sealed tube, do not place your old thermostat in the  
trash.  
Contact your local waste management authority for  
instructions regarding recycling and the proper disposal  
of an old thermostat containing mercury in a sealed  
tube.  
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Step 4. Follow Special Instructions  
1
.
If you have two C and/or C1 wires connected to  
your old thermostat, do not connect them to your  
new thermostat.  
2
3
.
.
Disconnect the C and/or C1 wires. Make sure they  
do not touch each other or any other wires.  
Wrap the bare end of each C and/or C1 wire with  
electrical tape.  
OLD THERMOSTAT  
LETTER  
DESIGNATION  
Y
W
G
C
SCREW  
TERMINAL  
WIRE  
R
C
WIRE HOLE  
DO NOT CONNECT TO NEW  
THERMOSTAT  
M22201  
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Step 4. Follow Special Instructions (Cont)  
4
.
If you have only one C and/or C1 wire connected to  
your old thermostat, connect this wire to C on the  
new thermostat.  
OLD THERMOSTAT  
LETTER  
DESIGNATION  
Y
W
G
SCREW  
TERMINAL  
WIRE  
R
C
WIRE HOLE  
CONNECT TO THE "C" ON THE  
NEW THERMOSTAT  
M22223  
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Step 4. Follow Special Instructions (Cont)  
5
6
.
.
If you find any wires not connected to your old  
thermostat, do not connect them to your new  
thermostat.  
Wrap the end of the wires that are not connected  
with electrical tape.  
OLD THERMOSTAT  
LETTER DESIGNATION  
Y
W
SCREW TERMINAL  
WIRE  
G
WIRE HOLE  
R
RC  
WIRES NOT CONNECTED –  
DO NOT CONNECT TO  
NEW THERMOSTAT  
M22040  
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Step 5. Label Old Thermostat Wires  
1
2
.
.
As you disconnect each wire, use the enclosed wire  
labels to wrap a wire label around each wire that  
matches the letter designation. Do not allow the  
wires to fall into the wall opening after the wires are  
disconnected.  
Remove any remaining part of the old thermostat  
from the wall.  
OLD THERMOSTAT  
WIRE LABEL  
LETTER  
DESIGNATION  
Y
W
SCREW  
TERMINAL  
G
R
WIRE  
R
C
WIRE HOLE  
M22039  
When connecting the wires to the new  
thermostat, refer to the wire labels. Do not  
connect wires to your new thermostat based on  
the color of the wire.  
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Step 6. Mount New Wallplate to Wall  
1
.
Separate the wallplate from the thermostat as  
shown.  
WALLPLATE  
WIRE HOLE  
THERMOSTAT  
M22267  
11  
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Step 6. Mount New Wallplate to Wall (Cont)  
2
.
Pass the labeled wires through the wire hole on the  
wallplate.  
WALL OPENING  
WIRE HOLE  
WALLPLATE  
LABELED WIRES  
M22279  
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Step 6. Mount New Wallplate to Wall (Cont)  
3
.
Position the wallplate on the wall with the arrow  
pointing up. Level the wallplate (for appearance  
only) and mark the two mounting holes with  
a pencil.  
PLACE LEVEL ON  
SUPPORT TABS  
LEVEL  
MARK  
MOUNTING  
HOLES (2)  
WALLPLATE  
M22292  
1
3
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Step 6. Mount New Wallplate to Wall (Cont)  
4
5
.
.
Move the wallplate aside and drill holes at the  
locations marked on the wall. Drill 3/16 in. holes for  
drywall or 7/32 in. holes for plaster.  
Tap the wall anchors into the drilled holes until even  
with the wall surface.  
DRILLED  
HOLES (2)  
WALL  
ANCHORS (2)  
WALLPLATE  
MOUNTING  
SCREWS (2)  
M22293  
6
7
.
.
Position the wallplate over the wall anchors.  
Insert the mounting screws into the wall anchors.  
Check leveling, if desired, and tighten the mounting  
screws.  
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Step 7. Connect Wires to New Wallplate  
1
2
.
.
Match the labeled wires to the letter designations  
on the wallplate.  
Select the correct letter designations to follow for  
your system. If you have a standard heating and/or  
cooling system, use the CONVENTIONAL letter  
designations. If you have a heat pump system, use  
the HEAT PUMP letter designations to wire the new  
thermostat.  
M22294  
See table on page 30 to help you determine if  
you have a CONVENTIONAL or HEAT PUMP  
system.  
1
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Step 7. Connect Wires to New Wallplate (Cont)  
3
4
.
.
If wires are to be connected to both Rc and R,  
loosen the Rc and R screw terminals and remove  
the metal jumper wire.  
If only one of the terminals, Rc or R, is to be  
connected, leave the metal jumper wire in place.  
TERMINAL BLOCK  
SCREW TERMINALS  
LETTER  
DESIGNATIONS  
WALLPLATE  
C
G
Y
O/B  
RC  
R
METAL JUMPER WIRE  
M22295  
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Step 7. Connect Wires to New Wallplate (Cont)  
5
.
Loosen the screw terminals. Insert the labeled  
wires into the holes on the side of the terminal block  
that match the letter designations. Tighten the  
screw terminals.  
6
.
If any of the labeled wires do not match the letter  
designations, see next page for wire connections.  
LABELED WIRES  
TERMINAL BLOCK  
SCREW TERMINALS  
CONVENTIONAL  
LETTER  
DESIGNATIONS  
WALLPLATE  
WIRE HOLE  
C
G
Y
G
Y
W
W
C
R
RC  
R
R
INSERT WIRE IN HOLE  
M22325  
1
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Step 7. Connect Wires to New Wallplate (Cont)  
7
.
Compare letter designations on your old and new  
thermostats. Use the information below if you are  
wiring a CONVENTIONAL System. Use the  
information on page 20 if you are wiring a Heat  
Pump system.  
CONVENTIONAL  
letter designations  
on the new thermostat the labeled wires  
Possible letter  
designations on  
2
2
1
RC or R  
RC  
R
1
R
W
Y
or RH, 4, V  
or W1, H  
or Y1, M  
or F  
W
Y
G
G
3
4
C
or C1, X, B  
C
Y2  
W2  
Y2  
W2  
M22208  
Do not connect more than one wire to each  
terminal. Be sure to read the notes referenced in  
the numbered triangles above. These numbered  
notes appear on the next page.  
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Step 7. Connect Wires to New Wallplate (Cont)  
NOTES FOR CONVENTIONAL HEATING AND COOLING SYSTEMS  
1
If wires will be connected to both RC and R on the new thermostat,  
remove metal jumper wire between RC and R. Leave metal jumper  
wire in place if only one of the terminals, RC or R, will be connected  
on the new thermostat.  
2
If wires were connected to both R and RH terminals on the old  
thermostat, remove metal jumper wire between RC and R on the  
new thermostat. Connect the old R to the new RC and the old RH  
to the new R.  
3
4
If two C and/or C1 wires were connected to the old thermostat, do  
not connect them to the new thermostat. Wrap the bare end of  
each wire separately with electrical tape and do not use.  
If one C and/or C1 wire was connected to the old thermostat, the  
wire should be connected to the "C" letter designation on the new  
thermostat.  
M22246  
1
9
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Step 7. Connect Wires to New Wallplate (Cont)  
8
.
Compare letter designations on your old and new  
thermostats. Use the information below if you are  
wiring a HEAT PUMP system.  
Possible letter  
designations on  
the labeled wires  
HEAT PUMP letter  
designations on the  
new thermostat  
1
RC  
R
2
3
VR or V or  
H or B,  
Y1 or M or  
F or  
R
O
O/B  
Y
Y
G
C
L
G
3
X or B,  
F or  
C
L
X2 or X,  
E
E
4
AUX, W1, W or W2  
AUX  
M22210  
Be sure to read the note referenced in the  
numbered triangles above. These numbered  
notes appear on the next page.  
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Step 7. Connect Wires to New Wallplate (Cont)  
NOTES FOR HEAT PUMP SYSTEMS  
1
2
Leave metal jumper wire between RC and R in place.  
If the old thermostat had separate wires on both the V and VR,  
some system modification is required. Call your local heating  
and cooling contractor for assistance.  
3
4
If the old thermostat had wires on both O and B, be sure to  
attach the B wire to the C letter designation on the new  
thermostat. If another wire is already matched to the C, contact  
Honeywell.  
If the old thermostat had wires on W1, Y1 and W2, some  
system modification is required. Call your local heating and  
cooling contractor for assistance.  
M22245  
2
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Step 7. Connect Wires to New Wallplate (Cont)  
9
.
Push excess wire back into the wall opening. Keep  
wires in the shaded area.  
WIRE  
WALLPLATE  
WALL OPENING  
SHADED AREA  
M22297  
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Step 8. Install Batteries  
1
.
Install two fresh AA alkaline batteries on the back of  
the thermostat as marked on the thermostat.  
BATTERIES (2)  
BATTERY HOLDER  
M22259  
BACK OF THERMOSTAT  
2
.
Remove tab labeled “Remove during installation”  
in the lower right corner of the thermostat back.  
REMOVE  
TAB  
M
O
V
E
 D
 U
 R
 I
 N
 G
SLATION  
M
O
V
 E
 D
  U
  R
  I
  N
   G
SLATION  
M22298  
2
3
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Step 9. Attach New Thermostat to Wallplate  
1
.
Align the screw blocks with the pins on the back of  
the thermostat.  
WALLPLATE  
TERMINAL SCREW BLOCK  
PINS ON  
BACK OF  
THERMOSTAT  
M22299  
2
3
.
.
Push the thermostat straight onto the wallplate until  
it snaps into place.  
Turn on the power at the heating and/or cooling  
system or fuse/circuit breaker panel.  
If the wires interfere with mounting the  
thermostat to the wallplate, push the excess  
wire back into the wall opening.  
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Step 10. Set the Calendar  
This thermostat is designed to automatically keep current  
time and day in memory for up to ten years, under normal  
use, once the calendar is set. When the thermostat is first  
powered, the display is ready to set the calendar.  
1
.
Use Up or Down arrow button to set the Month.  
MONTH  
YEAR  
DAY  
UP AND DOWN  
BUTTONS  
CHANGES  
MONTH,  
DAY AND  
YEAR  
Tue  
FanUseEdit  
Schedule  
NextHoldStep  
Clock  
Reset  
DONE  
BUTTON  
ADVANCES  
TO TIME  
SETTING  
SCREEN  
GO BACK BUTTON  
GOES BACK TO LAST SETTING  
NEXT BUTTON  
ADVANCE TO NEXT SETTING  
M22302  
2
3
4
5
.
.
.
.
Press the Next button to advance to the Date.  
Use the Up or Down arrow button to set the Date.  
Press the Next button to advance to the Year.  
Use the Up or Down arrow button to set the Year.  
The calendar can be set anytime. See Step 11,  
Configure Installer Setup, for instructions.  
2
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Step 10. Set the Calendar (Cont)  
6
7
.
.
Press the Done button to advance to the Time.  
Use the Up or Down arrow button to set the Time.  
UP AND DOWN BUTTONS  
CHANGES TIME  
PM  
Clock More  
Done  
DONE BUTTON  
ADVANCES TO HOME SCREEN  
M22303  
8
.
Press the Done button.  
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Step 11. Configure Installer Setup  
1
2
.
.
Use the Installer Setup Menu to match your new  
thermostat to your heating and/or cooling system.  
Follow the steps in this section to set up your  
thermostat.  
Press and release the System button.  
Tue  
Set To  
System Auto Fan Auto  
Heat Off Cool  
System & Fan  
Schedule  
Clock & More  
M22304  
2
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Step 11. Configure Installer Setup (Cont)  
3
.
Press and hold the center button for approximately  
five seconds, until the screen changes.  
System Auto Fan Auto  
Em Heat Off Cool  
FanUseEdit  
System & Fan  
CancelDone  
M22305  
4
.
Release the center button when the display on  
your thermostat matches the display below.  
ResetGo Back NextHoldStep CancelDone  
M22326  
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11. Configure Installer Setup (Cont)  
5
6
7
.
.
.
Press the Up or Down arrows to select your setting  
for Installer Setup Number 0120 below.  
After you select your setting, press the Next button  
to go to the next Installer Setup Number.  
Follow steps 5 and 6 to set Installer Setup Numbers  
0
130, 0140 and 0150 to complete setting the  
calendar.  
FACTORY  
SETTING  
Period  
Wake Leave  
INSTALLER  
SETUP NUMBER  
CHANGE  
THE  
FACTORY  
SETTING  
Clock More  
Done  
Go Back Next  
GOES BACK  
TO LAST  
INSTALLER  
SETUP  
ADVANCE TO  
NEXT INSTALLER  
SETUP  
PRESS TO EXIT  
INSTALLER SETUP  
Installer  
Setup  
Number  
Installer  
Setup  
Name  
(
Select Your Setting)  
Settings  
0120  
0130  
0140  
0150  
Date (Year Select first two digits of current  
Upper)  
calendar year (20 for year 2005, etc).  
Date (Year Select last two digits of current  
calendar year (05 for year 2005, etc).  
Lower)  
Date  
Month)  
Date  
Select number that represents current  
calendar month.  
(
Select number that represents current  
calendar date.  
(
Day)  
M22307  
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Step 11. Configure Installer Setup (Cont)  
8
9
.
.
Press the Up or Down arrows to select your setting  
for Installer Setup Number 0170.  
After you select your setting, press the Next button  
to go to the next Installer Setup Number.  
SETTING  
INSTALLER  
SETUP NUMBER  
Set To  
%
UP  
ARROW  
GOES BACK TO  
LAST INSTALLER  
SETUP  
DOWN  
ARROW  
Clock More  
Done  
Go Back Next  
ADVANCE  
TO NEXT  
INSTALLER SETUP  
PRESS TO EXIT  
INSTALLER SETUP  
Installer Installer  
(
Select Your Setting)  
Settings  
Setup  
Setup  
Number Name  
0
170  
System  
Type  
1 - Heating and Cooling (Conventional) -- Gas, oil or  
electric heating with central air conditioning.  
Selection 2 - Single-stage Heat Pump with no back-up or  
auxiliary heat -- the compressor runs in both  
heating and cooling.  
3
4
5
- Heat Only with no fan (Conventional) -- Gas, oil  
or electric heating without central air conditioning.  
No wire on the G terminal on new thermostat.  
- Heat Only with fan (Conventional) -- Gas, oil or  
electric heating without central air conditioning.  
Typically wires are R, W and G on new thermostat.  
- Hot Water Heat Only (Conventional) -- Gas or Oil  
hot water heat with three wires connected to new  
thermostat or for normally closed hot water values  
with wires connected to R and Y on new thermostat.  
- Cool Only (Conventional) -- Central air  
conditioning only.  
6
7
8
- Multistage Heat Pumps -- heat pump with auxiliary  
or back-up heat.  
- Multistage Conventional Heating and Cooling --  
2 stages of Heat (wires on W and W2) and 2 stages  
of Cool (wires on Y and Y2).  
9
1
- Multistage Conventional Heating and Cooling --  
stages of heat (wires on W and W2) and 1 stage  
of Cool (wire on Y).  
2
0 - Multistage Conventional Heating and Cooling --  
1
(
stage of heat (wire on W) and 2 stages of Cool  
wires on Y and Y2).  
M22308  
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Step 11. Configure Installer Setup (Cont)  
1
0. If you do not have a number 0180 on the left side of  
your display, go to the next page.  
1
1. If you have a number 0180 on the left side of your  
display, press the Up or Down arrow to select your  
setting for Installer Setup Number 0180.  
1
2. After you select your setting, press the Next button  
to go to the next Installer Setup Number.  
SETTING  
Period  
Wake Leave  
INSTALLER  
SETUP NUMBER  
UP  
ARROW  
DOWN  
ARROW  
Clock More  
Done  
Go Back Next  
GOES BACK  
TO LAST  
INSTALLER  
SETUP  
ADVANCE TO  
NEXT INSTALLER  
SETUP  
PRESS TO EXIT  
INSTALLER SETUP  
Installer  
Setup  
Number  
Installer  
Setup  
Name  
(
Select Your Setting)  
Settings  
0
180  
Fan Control 0 - Gas or Oil Heat -- Heating system  
in Heating  
controls fan in a call for heat.  
- Electric Heat -- Thermostat controls  
fan in a call for heat.  
1
M22309  
3
1
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Step 11. Configure Installer Setup (Cont)  
1
1
3. If you do not have a number 0190 on the left side of  
your display, go to the next page.  
4. If you have a number 0190 on the left side of your  
display, press the Up or Down arrow to select your  
setting for Installer Setup Number 0190.  
1
5. After you select your setting, press the Next button  
to go to the next Installer Setup Number.  
SETTING  
Period  
Wake Leave  
INSTALLER  
SETUP NUMBER  
UP  
ARROW  
DOWN  
ARROW  
Clock More  
Done  
Go Back Next  
GOES BACK  
TO LAST  
INSTALLER  
SETUP  
ADVANCE TO  
NEXT INSTALLER  
SETUP  
PRESS TO EXIT  
INSTALLER SETUP  
Installer  
Setup  
Number  
Installer  
Setup  
Name  
(
Select Your Setting)  
Settings  
0
190  
Heat Pump 0 - Changeover Valve in Cooling --  
Changeover  
Valve  
Use this setting if you connected a  
wire labeled O to the O/B terminal.  
- Changeover Valve in Heating --  
Use this setting if you connected a  
wire labeled B to the O/B terminal.  
1
M22310  
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Step 11. Configure Installer Setup (Cont)  
1
1
6. If you do not have a number 0240 on the left side of  
your display, go to the next page.  
7. If you have a number 0240 on the left side of your  
display, press the Up or Down arrow to select your  
setting for Installer Setup Number 0240.  
1
8. After you select your setting, press the Next button  
to go to the next Installer Setup Number.  
SETTING  
Period  
Wake Leave  
INSTALLER  
SETUP NUMBER  
UP  
ARROW  
DOWN  
ARROW  
Clock More  
Done  
Go Back Next  
GOES BACK  
TO LAST  
INSTALLER  
SETUP  
ADVANCE TO  
NEXT INSTALLER  
SETUP  
PRESS TO EXIT  
INSTALLER SETUP  
Installer  
Setup  
Number  
Installer  
Setup  
Name  
(
Select Your Setting)  
Settings  
0
240  
Heating  
Cycle  
Rate  
5 - Gas or Oil Furnace (less than  
90% efficient).  
9 - Electric Furnace.  
3
1
- Gas or Oil Hot Water, Gas 90%+  
High-Efficiency Furnace.  
- Gas or Oil Steam, Gas or Oil  
Gravity.  
M22329  
3
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Step 11. Configure Installer Setup (Cont)  
1
2
9. Press the Up or Down arrow to select your setting  
for Installer Setup Number 0320.  
0. After you select your setting, press the Next button  
to go to the next Installer Setup Number.  
SETTING  
Period  
Wake Leave  
INSTALLER  
SETUP NUMBER  
UP  
ARROW  
DOWN  
ARROW  
Clock More  
Done  
Go Back Next  
GOES BACK  
TO LAST  
INSTALLER  
SETUP  
ADVANCE TO  
NEXT INSTALLER  
SETUP  
PRESS TO EXIT  
INSTALLER SETUP  
Installer  
Setup  
Number  
Installer  
Setup  
Name  
(
Select Your Setting)  
Settings  
0
320  
Temperature 0 - Fahrenheit Temperature Display.  
Indication  
Scale  
1 - Celsius Temperature Display.  
M22311  
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Step 11. Configure Installer Setup (Cont)  
2
2
1. Press the Up or Down arrow to select your setting  
for Installer Setup Number 0330.  
2. After you select your setting, press the Next button  
to go to the next Installer Setup Number.  
SETTING  
Period  
Wake Leave  
INSTALLER  
SETUP NUMBER  
UP  
ARROW  
DOWN  
ARROW  
Clock More  
Done  
Go Back Next  
GOES BACK  
TO LAST  
INSTALLER  
SETUP  
ADVANCE TO  
NEXT INSTALLER  
SETUP  
PRESS TO EXIT  
INSTALLER SETUP  
Installer  
Setup  
Number  
Installer  
Setup  
Name  
(
Select Your Setting)  
Settings  
0
330  
Daylight  
Savings  
0 - Daylight Savings is Off -- clock will  
not adjust for Daylight Savings Time.  
1
- Daylight Savings is On -- clock will  
automatically adjust for Daylight  
Savings Time.  
M22312  
3
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Step 11. Configure Installer Setup (Cont)  
2
2
3. Press the Up or Down arrow to select your setting  
for Installer Setup Number 0500.  
4. After you select your setting, press the Next button  
to go to the next Installer Setup Number.  
SETTING  
Period  
Wake Leave  
INSTALLER  
SETUP NUMBER  
UP  
ARROW  
DOWN  
ARROW  
Clock More  
Done  
Go Back Next  
GOES BACK  
TO LAST  
INSTALLER  
SETUP  
ADVANCE TO  
NEXT INSTALLER  
SETUP  
PRESS TO EXIT  
INSTALLER SETUP  
Installer  
Setup  
Number  
Installer  
Setup  
Name  
(
Select Your Setting)  
Settings  
0
500  
Furnace  
Filter  
Change  
Reminder  
0 - Furnace Filter change reminder  
is Off  
1 - Approximately 1 month -- based  
on 10 days of fan run time.  
2
3
4
5
6
- Approximately 3 months -- based  
on 30 days of fan run time.  
- Approximately 6 months -- based  
on 60 days of fan run time.  
- Approximately 9 months -- based  
on 90 days of fan run time.  
- Approximately 1 year -- based  
on 120 days of fan run time.  
- Approximately 3 years -- based  
on 365 days of fan run time.  
M22313  
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Step 11. Configure Installer Setup (Cont)  
2
2
5. Press the Up or Down arrow to select your setting  
for Installer Setup Number 0530.  
6. After you select your setting, press the Next button  
to go to the next Installer Setup Number.  
SETTING  
Period  
Wake Leave  
INSTALLER  
SETUP NUMBER  
UP  
ARROW  
DOWN  
ARROW  
Clock More  
Done  
Go Back Next  
GOES BACK  
TO LAST  
INSTALLER  
SETUP  
ADVANCE TO  
NEXT INSTALLER  
SETUP  
PRESS TO EXIT  
INSTALLER SETUP  
Installer  
Setup  
Number  
Installer  
Setup  
Name  
(
Select Your Setting)  
Settings  
0
530  
Adaptive  
Intelligent  
TM  
Recovery  
0 - Conventional recovery -- system  
starts recovery at programmed  
time.  
TM  
1
- Adaptive Intelligent Recovery --  
system starts early so the setting is  
reached by the start of programmed  
period.  
M22314  
3
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Step 11. Configure Installer Setup (Cont)  
2
2
2
7. Press the Up or Down arrow to select your setting  
for Installer Setup Number 0640.  
8. After you select your setting, press the Done key to  
exit the Installer Setup and save your settings.  
9. Congratulations! The installation of the thermostat  
is complete.  
SETTING  
Outside Saved  
INSTALLER  
SETUP NUMBER  
Set To  
%
UP  
ARROW  
Permanent Hold  
DOWN  
ARROW  
Clock More  
Done  
Go Back Next  
GOES BACK  
TO LAST  
INSTALLER  
SETUP  
ADVANCE TO  
NEXT INSTALLER  
SETUP  
PRESS TO EXIT  
INSTALLER SETUP  
Installer  
Setup  
Number  
Installer  
Setup  
Name  
(
Select Your Setting)  
Settings  
0
640  
Clock  
Format  
12 - 12-hour clock format.  
24 - 24-hour clock format.  
M22315  
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Get to Know Your Thermostat Buttons  
Thermostat  
DOWN BUTTON  
LOWERS TEMPERATURE SETTING OR  
MAKES SELECTIONS IN OTHER SCREENS  
UP ARROW BUTTON  
RAISES TEMPERATURE SETTING OR  
MAKES SELECTIONS IN OTHER SCREENS  
PM  
System  
Fan  
System & Fan  
Schedule  
Clock & More  
SCHEDULE BUTTON  
SELECTS PROGRAMMING  
MODE  
CLOCK &  
SYSTEM & FAN BUTTON  
SELECTS FAN AUTO OR ON  
SELECTS HEAT, OFF, COOL  
AND EM HEAT  
MORE BUTTON  
SELECTS TIME AND  
FURNACE FILTER  
INFORMATION  
M22316  
3
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Get to Know Your Thermostat Display  
Display  
SHOWS CURRENT  
DAY OF WEEK  
TEMPERATURE  
SETTING  
CURRENT  
TIME  
Mon  
Aux  
System  
Schedule  
Clock & More  
CURRENT  
SYSTEM SETTING  
INDICATES  
THERMOSTAT IS  
"CALLING FOR  
COOL OR HEAT"  
CURRENT  
FAN SETTING  
M22317  
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Set System Setting  
Set System Setting  
Press the System button to select Heat, Off or Cool:  
Heat—Thermostat controls the heating system.  
Off—Heating and cooling systems are both off.  
Cool—Thermostat controls the cooling system.  
Em. Heat (Heat Pump Systems with Auxiliary  
Heat)—Thermostat controls emergency heat  
and auxiliary heat, if needed. Heat Pump  
compressor is not operational.  
CAUTION  
Equipment Damage Hazard.  
Air conditioning compressor damage possible.  
Do not operate cooling system when outdoor  
temperature is below 50 °F (10 °C).  
Tue  
Set To  
System Auto Fan Auto  
Heat Off Cool  
System & Fan  
Schedule  
Clock & More  
M22304  
4
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Set System Setting (Cont)  
Set Fan Setting  
1
.
Press System & Fan button.  
2
.
Press the Fan button to select Auto or On:  
Auto—Normal setting for most homes.The fan  
runs only when the heating or cooling system  
is on.  
On—The fan runs continuously. Use this setting  
for improved air circulation or for more efficient  
air cleaning.  
System Auto Fan Auto  
Em Heat Off Cool  
FanUseEdit  
System & Fan  
CancelDone  
M22305  
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Program Your Heating and Cooling Schedule  
Your thermostat can control up to four different schedule  
periods Monday through Friday and Saturday and/or  
Sunday :  
Wake—Period when you awaken and want your home at  
a comfortable temperature.  
Leave—Period when you are away from home and want  
an energy-saving temperature.  
Return—Period when you return home and want your  
home back to a comfortable temperature.  
Sleep—Period when you are asleep and want an energy-  
saving temperature.  
Edit Schedule  
1
.
Press the Schedule button.  
Tue  
System  
Heat  
System & Fan  
Schedule  
Clock & More  
M22330  
Press the View button to look at the schedule  
without editing the schedule.  
4
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Program Your Heating and Cooling Schedule (Cont)  
2
.
Press the Edit button.  
Mon  
Tue  
Wed  
Thu  
Fri  
Sat  
Sun  
Edit  
View  
Go Back  
M22331  
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Program Your Heating and Cooling Schedule (Cont)  
3
.
Monday through Friday flashes. Press the Select  
Day button to select Monday through Friday. The  
days selected are scheduled with the same times  
and temperatures. Checkmarks appear next to the  
days selected.  
Mon  
Tue  
Wed  
Thu  
Fri  
Sat  
Sun  
Select Day  
Next  
Step Cancel  
M22332  
You can select Mon-Fri as a block of days and  
select Saturday and Sunday separately. Use the  
Up and Down buttons to move up and down the  
list of days. Use the Select Day or DeSelect Day  
button to select the days you want to schedule.  
4
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Program Your Heating and Cooling Schedule (Cont)  
4
.
Press the Next Step button. Once pressed, Wake  
flashes to show it is selected.  
DAYS  
SELECTED  
SCHEDULE  
PERIOD  
HEAT OR COOL  
TEMPERATURES  
UP ARROW  
CHANGES TIME  
AND  
Mon  
Tue  
Wed  
Thu  
Fri  
Period  
Wake Leave  
TEMPERATURES  
Go Back Next  
Step  
Done  
DOWN ARROW  
CHANGES TIME  
AND  
TEMPERATURES  
GO BACK BUTTON  
GOES BACK TO THE  
LAST SCHEDULE STEP  
DONE BUTTON  
EXITS AND SAVES  
CHANGES MADE  
TO SCHEDULE  
NEXT STEP BUTTON  
ADVANCES PERIOD,TIME,  
HEAT AND COOL TEMPERATURES  
M22333  
5
6
.
.
Press the Next Step button to select the Wake time.  
Use the Up and Down arrow buttons to change the  
time.  
7
8
9
.
.
.
Press the Next Step button to select the Heating  
temperature.  
Use the Up and Down arrow buttons to change the  
temperature.  
Press the Next Step button to select the Cooling  
temperature.  
1
0. Use the Up and Down arrow buttons to change the  
temperature.  
1. Repeat steps 5 through 10 for the Leave, Return  
and Sleep schedules.  
1
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Program Your Heating and Cooling Schedule (Cont)  
1
2. When complete, press the Done button. “Saved”  
appears on the display to indicate changes are  
being saved to the day(s) selected.  
Mon  
Tue  
Wed  
Thu  
Fri  
Saved  
Sat  
M22334  
1
3. To set a program schedule for Saturday and  
Sunday, repeat steps 1 through 12.  
To select Saturday and/or Sunday to schedule, use  
the Down arrow button until Sat or Sun is flashing.  
When the desired day(s) is flashing, press the Select  
Day button.  
4
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Set Time  
Set Time  
1
2
.
.
Press Clock & More button.  
Use the Up and Down arrow buttons to set the  
current time.  
Tue  
PM  
Go Back  
Done  
M22335  
3
.
Press the Done button.  
The current day of the week should already be  
set correctly. If not, see Step 11, Configure  
Installer Setup.  
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Set Temperature Overrides  
Hold Temperature Until (Temporary Hold)  
Hold temperature temporarily until the next scheduled  
period time.  
1
.
Press the Up or Down arrow buttons next to the  
temperature you want to adjust. “Temporary”  
appears on the display above the set temperature.  
MOVES TEMPERATURE  
SETTING UP OR DOWN  
M22336  
2
.
Press the Use Schedule button to cancel  
“Temporary” temperature and resume schedule.  
4
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Set Temperature Overrides (Cont)  
Permanent Hold  
Permanent Hold changes the temperature setting until  
Permanent Hold is cancelled.  
1
2
.
.
Use the Up or Down arrow buttons to set the  
temperature you want during the hold.  
Press the Hold button. “Permanent Hold” shows on  
the display.  
Tue  
PM  
System  
Fan  
Use  
Schedule  
System & Fan  
Clock & More  
M22337  
3
.
Press the Use Schedule button to cancel  
Permanent Hold” and resume the schedule.  
The display shows Permanent Hold until it is  
cancelled.  
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Use Your Filter Timer  
The Filter Timer notifies you when to change your furnace  
filter.  
Reset Filter Timer  
1
.
“Change Filter” appears on the display when the  
filter timer expires.  
Press the Reset button to restart the filter timer.  
2
.
Tue  
PM  
System  
Heat  
Fan  
Schedule  
Clock & More  
Reset  
M22338  
See Step 11 to turn the Filter Timer Change  
Reminder feature on or off.  
5
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Use Your Filter Timer (Cont)  
View or Reset The Remaining Change Filter Time  
1
.
Press the Clock & More button.  
2
.
Press the Next button.  
Change Filter  
Days  
Reset  
Next  
Done  
M22339  
3
4
.
.
Press the Reset button to Restart the filter timer, if  
desired.  
Press the Done button.  
See Step 11 to turn the Filter Timer Change  
Reminder feature on or off.  
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Understand Temperature Recovery Feature  
Your thermostat comes with a feature called Adaptive Intelligent  
Recovery™, which eliminates all guesswork when setting your  
schedule. How longdoesit take the furnace towarm your housein  
the morning before you get out of bed or how long does it take the  
air conditioner to cool your house in the afternoon before you  
return from work? No problem. The thermostat determines that for  
you.  
Simply set your program schedule to the time you want the house  
to be at your comfort temperature. The thermostat then turns on  
the heating or cooling at just the right time to have your home  
reach your scheduled temperature at your scheduled time.  
For example—you get out of bed at 6:00 AM and want the  
temperature to be 70°F. Set the Wake period for 6:00 AM and  
7
0°F. The thermostat then turns on the heat before 6:00 AM to  
raise the temperature to 70°F by 6:00 AM.  
The thermostat alerts that the heating or cooling system is coming  
on before a scheduled time when “Recovery” shows on the  
screen.  
Tue  
PM  
Heat On  
System  
Fan  
System & Fan  
Schedule  
Clock & More  
M22340  
It takes about a week for the thermostat to adjust to  
local weather, your schedule, the construction of your  
home and your heating and/or cooling system. Each  
day it adjusts the next day’s recovery start time  
accordingly.  
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Replace Batteries  
1
.
When the LO Battery indicator is flashing, replace  
the batteries promptly with two fresh AA alkaline  
batteries.  
M22322  
2
.
Remove thermostat from the wallplate by pulling  
straight out.  
M22323  
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Replace Batteries (Cont)  
3
.
Remove the old batteries and insert two fresh AA  
alkaline batteries, as marked on the  
thermostat.  
BATTERIES (2)  
BATTERY HOLDER  
M22259  
BACK OF THERMOSTAT  
5
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Replace Batteries (Cont)  
4
.
Align the screw blocks with the pins on the back of  
the thermostat.  
WALLPLATE  
TERMINAL SCREW BLOCK  
PINS ON  
BACK OF  
THERMOSTAT  
M22299  
5
.
Push the thermostat straight onto the wallplate until  
it snaps into place.  
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Review Battery Tips  
1
.
Replace the batteries as soon as LO Batt flashes in  
the display. The LO Battery indicator flashes in the  
display one month before the batteries run down  
completely.  
2
3
.
.
Always use fresh AA alkaline batteries. Non-alka-  
line batteries do not last as long and can leak,  
causing thermostat damage.  
Although the thermostat has a Low Battery indica-  
tor, replace the batteries once a year to prevent the  
thermostat and heating/cooling system from shut-  
ting down due to lack of battery power.  
4
.
As a precaution, replace the batteries when leaving  
your home for more than a month to prevent your  
heating/cooling system from shutting down if the  
batteries run down completely.  
5
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Built-in Compressor Protection  
The RTH7400D Thermostat has built-in compressor  
protection (minimum-off timer) that prevents the  
compressor from restarting too early after a shutdown.  
The minimum-off timer is activated after the compressor  
turns off.  
If there is a call during the minimum-off timer, the  
thermostat shows “Wait” in the display.  
Tue  
Set To  
AM  
System  
Cool  
Fan Auto  
Wait  
System & Fan  
Schedule  
Clock & More  
M22341  
When the minimum-off timer expires, “Cool On” or “Heat  
a
On” appears solidly in the display and the compressor  
and fan turn on.  
_
________  
aHeat Pumps only.  
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Troubleshooting Tips  
Then . . .  
If . . .  
Display is  
blank.  
Check that fresh AA alkaline batteries are  
installed as marked on the thermostat.  
Temperature  
Check that the temperature settings are:  
settings do not  Heating 40°F to 90°F(4.5°C to 32°C).  
change.  
Cooling 50°F to 99°F (10°C to 37°C).  
Heatingsystem  Set the system to Heat by pressing the  
does not turn  
on.  
System button.  
Check the heat temperature setting to  
be sure it is set above the room  
temperature and “Heat On” shows  
solidly in the display.  
Check the circuit breaker to be sure it is  
not tripped.  
Check power switch at heating and/or  
cooling system to be sure it is on.  
Check the furnace door to be sure it is  
closed securely.  
Wait five minutes for the heating system  
to respond.  
If all of this was checked, contact your  
local heating and cooling contractor.  
Cooling system  Set the system to Cool by pressing the  
does not turn  
on.  
System button.  
Check the cool temperature setting to be  
sure it is set below the room  
temperature and “Cool On” shows  
solidly in the display.  
Check the circuit breaker to be sure it is  
not tripped.  
Check the power switch at the heating  
and/or cooling system to be sure it is on.  
Check the furnace door to be sure it is  
closed securely.  
Wait five minutes for the cooling system  
to respond.  
If all of this was checked, contact your  
local heating and cooling contractor.  
5
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Troubleshooting Tips (Continued)  
If . . .  
Then . . .  
Cannot set  
Check Installer Setup Number 0170,  
System setting Heating and/or Cooling System Type; make  
to Cool.  
sure the setting matches the installed  
heating and/or cooling system.  
Heat On” is  
Set the System setting to Heat and set the  
temperature setting above the room  
temperature. If “Heat On” is shown solidly in  
the display, but the heating system does not  
turn on, see “Heating system does not turn  
on” in the Troubleshooting Tips.  
not shown in  
the display.  
Cool On” is  
Set the System setting to Cool and set the  
temperature setting below the room  
temperature. If “Cool On” is shown solidly in  
the display, but the cooling system does not  
turn on, see “Cooling system does not turn  
on” in the Troubleshooting Tips.  
not shown in  
the display.  
Wait” shows in Compressor minimum-off timer is active.  
Wait up to five minutes for the cooling or  
heating system to turn on.  
the display.  
Fan does not Check Installer Setup Number 0180, Fan  
turn on in a call Control in Heating, and make sure it is set  
for heat  
to Electric Heat.  
(
electric fur-  
naces only).  
Heat pump  
Check Installer Setup Number 0190, Heat  
Pump Changeover Valve, and make sure  
puts out cool  
air in the heat the setting matches the changeover  
mode and  
warm air in the  
cool  
mode (heat  
pumps only).  
required by the installed heat pump.  
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Troubleshooting Tips (Continued)  
If . . .  
Then . . .  
Both the  
Check Installer Setup Number 0170,  
Heating and/or Cooling System Type, and  
make sure the setting matches the installed  
heating and/or cooling system.  
heating and  
cooling  
systems are  
running at the  
same time.  
Check and make sure the bare portions of  
the wires are not touching.  
Heatingsystem Check Installer Setup Number 0170,  
is running in  
cool mode.  
Heating and/or Cooling System Type, and  
make sure the setting matches the installed  
heating and/or cooling system.  
Heatingsystem Check Installer Setup Number 0170,  
does not turn Heating and/or Cooling System Type, and  
off and the heat make sure the setting matches the installed  
temperature  
setting is set  
below the room  
temperature  
heating and/or cooling system.  
(
“Heat On” is  
not shown in  
display).  
Red LED is on A system monitor is wired to the thermostat  
in the upper left L terminal. See Heating or Cooling system  
corner and the does not turn on in the Troubleshooting  
Heat Pump is Tips.  
not working.  
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Customer Assistance  
For assistance with your Honeywell product, please visit  
www.honeywell.com/yourhome or call Honeywell  
Customer Care toll free at 1-800-468-1502.  
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Limited One-Year Warranty  
Honeywell warrants this product, excluding battery, to be free from defects  
in the workmanship or materials, under normal use and service, for a  
period of one (1) year from the date of purchase by the consumer. If, at any  
time during the warranty period, the product is defective or malfunctions,  
Honeywell shall repair or replace it (at Honeywell’s option) within a  
reasonable period of time.  
If the product is defective,  
(i) return it, with a bill of sale or other dated proof of purchase, to the  
retailer from which you purchased it, or  
(
ii) package it carefully, along with proof of purchase (including date of  
purchase) and a short description of the malfunction, and mail it,  
postage prepaid, to the following address:  
Honeywell Return Goods  
Dock 4 MN10-3860  
1885 Douglas Dr N  
Golden Valley, MN 55422  
This warranty does not cover removal or reinstallation costs. This warranty  
shall not apply if it is shown by Honeywell that the defect or malfunction  
was caused by damage which occurred while the product was in the  
possession of a consumer.  
Honeywell’s sole responsibility shall be to repair or replace the product  
within the terms stated above. HONEYWELL SHALL NOT BE LIABLE  
FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY  
INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING,  
DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY  
WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF  
THIS PRODUCT. Some states do not allow the exclusion or limitation of  
incidental or consequential damages, so this limitation may not apply to  
you.  
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Limited One-Year Warranty (Cont)  
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL  
MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED  
WARRANTIES, INCLUDING THE WARRANTIES OF  
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,  
IS HEREBY LIMITED TO THE ONE-YEAR DURATION OF THIS  
WARRANTY. Some states do not allow limitations on how long an implied  
warranty lasts, so the above limitation may not apply to you.  
This warranty gives you specific legal rights, and you may have other  
rights which vary from state to state.  
If you have any questions concerning this warranty, please write  
Honeywell Customer Relations, 1985 Douglas Dr, Golden Valley, MN  
5
5422 or call 1-800-468-1502. In Canada, write Retail Products  
ON15-02H, Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive,  
Scarborough, Ontario M1V4Z9.  
Automation and Control Solutions  
Honeywell International Inc.  
Honeywell Limited-Honeywell Limitée  
35 Dynamic Drive  
1
985 Douglas Drive North  
Golden Valley, MN 55422  
Scarborough, Ontario  
M1V 4Z9  
6
9-1726—1 G.H. 08-04  
www.honeywell.com/yourhome  

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