Honeywell Rth7400D Owners Manual 69 1726 Programmable Thermostat

2014-12-11

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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

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

69-1726—1

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
fusibles-interruptor té

Mon

Read and save these instructions

V/VR V/VR

Y2
H

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.

69-1726—1

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

69-1726—1

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

RED

G
GREEN

!
DO NOT WIRE
NEW THERMOSTAT
BASED ON
WIRE COLOR.

R
RC

ORANGE
M22034

69-1726—1

Step 3. Remove Old Thermostat
1.
2.
3.

Turn off power at the heating and/or cooling system
or fuse/circuit breaker panel.
Remove the cover from the old thermostat.
Remove the old thermostat from the wall or wallplate. Do not remove the wires.
OLD THERMOSTAT
WALLPLATE
W

THERMOSTAT
G

COVER

R
C

.18
.2
.9
.7
.5
O
.25 N G E R .4
.3

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.
69-1726—1

Step 4. Follow Special Instructions
1.
2.
3.

If you have two C and/or C1 wires connected to
your old thermostat, do not connect them to your
new thermostat.
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

SCREW
TERMINAL

WIRE

R
C

WIRE HOLE
DO NOT CONNECT TO NEW
THERMOSTAT
M22201

69-1726—1

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

Y
G

LETTER
DESIGNATION
SCREW
TERMINAL
WIRE

R
C

WIRE HOLE
CONNECT TO THE "C" ON THE
NEW THERMOSTAT
M22223

69-1726—1

Step 4. Follow Special Instructions (Cont)
5.

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

SCREW TERMINAL
WIRE

WIRE HOLE

R
RC

WIRES NOT CONNECTED –
DO NOT CONNECT TO
NEW THERMOSTAT

M22040

69-1726—1

Step 5. Label Old Thermostat Wires
1.

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

SCREW
TERMINAL

WIRE

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.
69-1726—1

Step 6. Mount New Wallplate to Wall
1.

Separate the wallplate from the thermostat as
shown.
WALLPLATE
WIRE HOLE

THERMOSTAT
M22267

69-1726—1

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

69-1726—1

M22279

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

69-1726—1

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.

69-1726—1

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.
15

69-1726—1

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

69-1726—1

M22295

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.
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
G

WIRE HOLE

RC
R

INSERT WIRE IN HOLE
M22325

69-1726—1

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

Possible letter
designations on
the labeled wires
2

RC or R

RC
2

R or RH, 4, V

R
W or W1, H

W
Y or Y1, M

Y
G or F

G
3

C or C1, X, B

C
Y2

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.
69-1726—1

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 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.
4 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

69-1726—1

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

2
VR or V or R

R
3
H or B, O

O/B
Y1 or M or Y

F or G

3
X or B, C

F or L

X2 or X, 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.
69-1726—1

Step 7. Connect Wires to New Wallplate (Cont)

NOTES FOR HEAT PUMP SYSTEMS
1 Leave metal jumper wire between RC and R in place.
2 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 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.
4 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

69-1726—1

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

69-1726—1

M22297

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

BACK OF THERMOSTAT

M22259

Remove tab labeled “Remove during installation”
in the lower right corner of the thermostat back.

REMOVE DURING
INSTALLATION

REMOVE
TAB

M22298

69-1726—1

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

2.
3.

M22299

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.

69-1726—1

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

DAY

YEAR

Tue

Reset

FanUseEdit
Schedule
NextHoldStep

Clock

GO BACK BUTTON
GOES BACK TO LAST SETTING

UP AND DOWN
BUTTONS
CHANGES
MONTH,
DAY AND
YEAR

DONE
BUTTON
ADVANCES
TO TIME
SETTING
SCREEN
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.
25

69-1726—1

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

Clock

More
Done

DONE BUTTON
ADVANCES TO HOME SCREEN

Press the Done button.

69-1726—1

M22303

Step 11. Configure Installer Setup
1.

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

69-1726—1

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

Release the center button when the display on
your thermostat matches the display below.

ResetGo Back NextHoldStep

CancelDone

M22326

69-1726—1

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
0130, 0140 and 0150 to complete setting the
calendar.

FACTORY
SETTING

Period
Wake Leave

INSTALLER
SETUP NUMBER

Clock

Go Back

GOES BACK
TO LAST
INSTALLER
SETUP

ADVANCE TO
NEXT INSTALLER
SETUP

CHANGE
THE
FACTORY
SETTING

More
Done

PRESS TO EXIT
INSTALLER SETUP

Installer
Setup
Number

Installer
Setup
Name

0120

Date (Year
Upper)

Select first two digits of current
calendar year (20 for year 2005, etc).

0130

Date (Year
Lower)

Select last two digits of current
calendar year (05 for year 2005, etc).

0140

Date
(Month)

Select number that represents current
calendar month.

0150

Date
(Day)

Select number that represents current
calendar date.

(Select Your Setting)
Settings

M22307

69-1726—1

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
%

GOES BACK TO
LAST INSTALLER
SETUP

Clock

Go Back

ADVANCE
TO NEXT
INSTALLER SETUP

System
Type
Selection

DOWN
ARROW

More
Done

PRESS TO EXIT
INSTALLER SETUP

Installer Installer
Setup
Setup
Number Name
0170

UP
ARROW

(Select Your Setting)
Settings
1 - Heating and Cooling (Conventional) -- Gas, oil or
electric heating with central air conditioning.
2 - Single-stage Heat Pump with no back-up or
auxiliary heat -- the compressor runs in both
heating and cooling.
3 - Heat Only with no fan (Conventional) -- Gas, oil
or electric heating without central air conditioning.
No wire on the G terminal on new thermostat.
4 - Heat Only with fan (Conventional) -- Gas, oil or
electric heating without central air conditioning.
Typically wires are R, W and G on new thermostat.
5 - 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.
6 - Cool Only (Conventional) -- Central air
conditioning only.
7 - Multistage Heat Pumps -- heat pump with auxiliary
or back-up heat.
8 - 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 - Multistage Conventional Heating and Cooling -2 stages of heat (wires on W and W2) and 1 stage
of Cool (wire on Y).
10 - Multistage Conventional Heating and Cooling -1 stage of heat (wire on W) and 2 stages of Cool
(wires on Y and Y2).
M22308

69-1726—1

Step 11. Configure Installer Setup (Cont)
10.
11.
12.

If you do not have a number 0180 on the left side of
your display, go to the next page.
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.
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

Clock

Go Back

GOES BACK
TO LAST
INSTALLER
SETUP

Installer
Setup
Number
0180

ADVANCE TO
NEXT INSTALLER
SETUP

Installer
Setup
Name

DOWN
ARROW

More
Done

PRESS TO EXIT
INSTALLER SETUP

(Select Your Setting)
Settings

Fan Control 0 - Gas or Oil Heat -- Heating system
controls fan in a call for heat.
in Heating
1 - Electric Heat -- Thermostat controls
fan in a call for heat.

M22309

69-1726—1

Step 11. Configure Installer Setup (Cont)
13.
14.
15.

If you do not have a number 0190 on the left side of
your display, go to the next page.
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.
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

Clock

Go Back

GOES BACK
TO LAST
INSTALLER
SETUP

Installer
Setup
Number
0190

ADVANCE TO
NEXT INSTALLER
SETUP

Installer
Setup
Name

DOWN
ARROW

More
Done

PRESS TO EXIT
INSTALLER SETUP

(Select Your Setting)
Settings

Heat Pump 0 - Changeover Valve in Cooling -Use this setting if you connected a
Changeover
wire labeled O to the O/B terminal.
Valve
1 - Changeover Valve in Heating -Use this setting if you connected a
wire labeled B to the O/B terminal.

M22310

69-1726—1

Step 11. Configure Installer Setup (Cont)
16.
17.
18.

If you do not have a number 0240 on the left side of
your display, go to the next page.
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.
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

Clock

Go Back

GOES BACK
TO LAST
INSTALLER
SETUP

ADVANCE TO
NEXT INSTALLER
SETUP

DOWN
ARROW

More
Done

PRESS TO EXIT
INSTALLER SETUP

Installer
Setup
Number

Installer
Setup
Name

(Select Your Setting)
Settings

0240

Heating
Cycle
Rate

5 - Gas or Oil Furnace (less than
90% efficient).
9 - Electric Furnace.
3 - Gas or Oil Hot Water, Gas 90%+
High-Efficiency Furnace.
1 - Gas or Oil Steam, Gas or Oil
Gravity.
M22329

69-1726—1

Step 11. Configure Installer Setup (Cont)
19.
20.

Press the Up or Down arrow to select your setting
for Installer Setup Number 0320.
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

Clock

Go Back

GOES BACK
TO LAST
INSTALLER
SETUP

Installer
Setup
Number
0320

ADVANCE TO
NEXT INSTALLER
SETUP

Installer
Setup
Name

DOWN
ARROW

More
Done

PRESS TO EXIT
INSTALLER SETUP

(Select Your Setting)
Settings

Temperature 0 - Fahrenheit Temperature Display.
Indication
1 - Celsius Temperature Display.
Scale

M22311

69-1726—1

Step 11. Configure Installer Setup (Cont)
21.
22.

Press the Up or Down arrow to select your setting
for Installer Setup Number 0330.
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

Clock

Go Back

GOES BACK
TO LAST
INSTALLER
SETUP

ADVANCE TO
NEXT INSTALLER
SETUP

DOWN
ARROW

More
Done

PRESS TO EXIT
INSTALLER SETUP

Installer
Setup
Number

Installer
Setup
Name

(Select Your Setting)
Settings

0330

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

69-1726—1

Step 11. Configure Installer Setup (Cont)
23.
24.

Press the Up or Down arrow to select your setting
for Installer Setup Number 0500.
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

Clock

Go Back

GOES BACK
TO LAST
INSTALLER
SETUP

ADVANCE TO
NEXT INSTALLER
SETUP

DOWN
ARROW

More
Done

PRESS TO EXIT
INSTALLER SETUP

Installer
Setup
Number

Installer
Setup
Name

(Select Your Setting)
Settings

0500

Furnace
Filter
Change
Reminder

0 - Furnace Filter change reminder
is Off
1 - Approximately 1 month -- based
on 10 days of fan run time.
2 - Approximately 3 months -- based
on 30 days of fan run time.
3 - Approximately 6 months -- based
on 60 days of fan run time.
4 - Approximately 9 months -- based
on 90 days of fan run time.
5 - Approximately 1 year -- based
on 120 days of fan run time.
6 - Approximately 3 years -- based
on 365 days of fan run time.
M22313

69-1726—1

Step 11. Configure Installer Setup (Cont)
25.
26.

Press the Up or Down arrow to select your setting
for Installer Setup Number 0530.
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

Clock

Go Back

GOES BACK
TO LAST
INSTALLER
SETUP

Installer
Setup
Number
0530

ADVANCE TO
NEXT INSTALLER
SETUP

Installer
Setup
Name

DOWN
ARROW

More
Done

PRESS TO EXIT
INSTALLER SETUP

(Select Your Setting)
Settings

0 - Conventional recovery -- system
Adaptive
starts recovery at programmed
Intelligent
time.
RecoveryTM
1 - Adaptive Intelligent RecoveryTM -system starts early so the setting is
reached by the start of programmed
period.
M22314

69-1726—1

Step 11. Configure Installer Setup (Cont)
27.
28.
29.

Press the Up or Down arrow to select your setting
for Installer Setup Number 0640.
After you select your setting, press the Done key to
exit the Installer Setup and save your settings.
Congratulations! The installation of the thermostat
is complete.
SETTING

INSTALLER
SETUP NUMBER

Outside Saved

Set To

UP
ARROW

Permanent Hold
Clock

Go Back

GOES BACK
TO LAST
INSTALLER
SETUP

ADVANCE TO
NEXT INSTALLER
SETUP

Installer
Setup
Number

Installer
Setup
Name

0640

Clock
Format

DOWN
ARROW

More
Done

PRESS TO EXIT
INSTALLER SETUP

(Select Your Setting)
Settings
12 - 12-hour clock format.
24 - 24-hour clock format.

M22315

69-1726—1

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

System

System & Fan

Fan

Schedule

Clock & More

SCHEDULE BUTTON
SELECTS PROGRAMMING
MODE

SYSTEM & FAN BUTTON

CLOCK &
MORE BUTTON

SELECTS FAN AUTO OR ON
SELECTS HEAT, OFF, COOL
AND EM HEAT

SELECTS TIME AND
FURNACE FILTER
INFORMATION
M22316

69-1726—1

Get to Know Your Thermostat Display
Display
TEMPERATURE
SETTING

SHOWS CURRENT
DAY OF WEEK
CURRENT
TIME

Mon

Aux

System
Schedule
he

INDICATES
THERMOSTAT IS
"CALLING FOR
COOL OR HEAT"

CURRENT
SYSTEM SETTING
CURRENT
FAN SETTING

69-1726—1

Clock & More
M

M22317

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

69-1726—1

Set System Setting (Cont)
Set Fan Setting
1.

Press System & Fan button.

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

69-1726—1

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 energysaving 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.
43

69-1726—1

Program Your Heating and Cooling Schedule (Cont)
2.

Press the Edit button.

Mon
Tue
Wed
Thu
Fri
Sat
Sun

Edit

View

Go Back

M22331

69-1726—1

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.
45

69-1726—1

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

Mon
Tue
Wed
Thu
Fri

CHANGES TIME
AND
TEMPERATURES

Period
Wake Leave

Go Back Next

Step

Done

DOWN ARROW
CHANGES TIME
AND
TEMPERATURES

GO BACK BUTTON

DONE BUTTON

GOES BACK TO THE
LAST SCHEDULE STEP

NEXT STEP BUTTON

EXITS AND SAVES
CHANGES MADE
TO SCHEDULE

ADVANCES PERIOD,TIME,
HEAT AND COOL TEMPERATURES

5.
6.
7.
8.
9.
10.
11.

M22333

Press the Next Step button to select the Wake time.
Use the Up and Down arrow buttons to change the
time.
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.
Use the Up and Down arrow buttons to change the
temperature.
Repeat steps 5 through 10 for the Leave, Return
and Sleep schedules.

69-1726—1

Program Your Heating and Cooling Schedule (Cont)
12.

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
Sat

Saved

M22334

13.

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.

69-1726—1

Set Time
Set Time
1.
2.

Press Clock & More button.
Use the Up and Down arrow buttons to set the
current time.

Tue

Done

Go Back

M22335

Press the Done button.

The current day of the week should already be
set correctly. If not, see Step 11, Configure
Installer Setup.
69-1726—1

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

Press the Use Schedule button to cancel
“Temporary” temperature and resume schedule.

69-1726—1

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

System

System & Fan

Fan

Use
Schedule

Clock & More

M22337

Press the Use Schedule button to cancel
“Permanent Hold” and resume the schedule.

The display shows Permanent Hold until it is
cancelled.

69-1726—1

Use Your Filter Timer
The Filter Timer notifies you when to change your furnace
filter.

Reset Filter Timer
1.
2.

“Change Filter” appears on the display when the
filter timer expires.
Press the Reset button to restart the filter timer.

Tue

System
Heat

Fan

Schedule

Clock & More

Reset

M22338

See Step 11 to turn the Filter Timer Change
Reminder feature on or off.
51

69-1726—1

Use Your Filter Timer (Cont)
View or Reset The Remaining Change Filter Time
1.
2.

Press the Clock & More button.
Press the Next button.

Change Filter

Days

Reset

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.
69-1726—1

Understand Temperature Recovery Feature
Your thermostat comes with a feature called Adaptive Intelligent
Recovery™, which eliminates all guesswork when setting your
schedule. How long does it take the furnace to warm your house in
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
70°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

Heat On
System

System & Fan

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.
53

69-1726—1

Replace Batteries
1.

When the LO Battery indicator is flashing, replace
the batteries promptly with two fresh AA alkaline
batteries.

Remove thermostat from the wallplate by pulling
straight out.

M22322

M22323

69-1726—1

Replace Batteries (Cont)
3.

Remove the old batteries and insert two fresh AA
alkaline batteries, as marked on the
thermostat.
BATTERIES (2)

BATTERY HOLDER

BACK OF THERMOSTAT

M22259

69-1726—1

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

Push the thermostat straight onto the wallplate until
it snaps into place.

69-1726—1

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.

Always use fresh AA alkaline batteries. Non-alkaline batteries do not last as long and can leak,
causing thermostat damage.

Although the thermostat has a Low Battery indicator, replace the batteries once a year to prevent the
thermostat and heating/cooling system from shutting down due to lack of battery power.

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.

69-1726—1

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
System & Fan

Fan Auto

Wait

Schedule

Clock & More

M22341

When the minimum-off timer expires, “Cool On” or “Heat
On”a appears solidly in the display and the compressor
and fan turn on.
_________
a

Heat Pumps only.

69-1726—1

Troubleshooting Tips
If . . .

Then . . .

Display is
blank.
Temperature
settings do not
change.
Heating system
does not turn
on.

Check that fresh AA alkaline batteries are
installed as marked on the thermostat.
Check that the temperature settings are:
• Heating 40°F to 90°F(4.5°C to 32°C).
• Cooling 50°F to 99°F (10°C to 37°C).
• Set the system to Heat by pressing the
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
System button.
on.
• 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.
59

69-1726—1

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
not shown in
temperature setting above the room
the display.
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.
Set the System setting to Cool and set the
“Cool On” is
not shown in
temperature setting below the room
the display.
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.
“Wait” shows in Compressor minimum-off timer is active.
the display.
Wait up to five minutes for the cooling or
heating system to turn on.
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 furnaces only).
Heat pump
Check Installer Setup Number 0190, Heat
puts out cool
Pump Changeover Valve, and make sure
air in the heat the setting matches the changeover
mode and
required by the installed heat pump.
warm air in the
cool
mode (heat
pumps only).

69-1726—1

Troubleshooting Tips (Continued)
If . . .
Both the
heating and
cooling
systems are
running at the
same time.

Then . . .
Check Installer Setup Number 0170,
Heating and/or Cooling System Type, and
make sure the setting matches the installed
heating and/or cooling system.
Check and make sure the bare portions of
the wires are not touching.

Heating system Check Installer Setup Number 0170,
is running in
Heating and/or Cooling System Type, and
cool mode.
make sure the setting matches the installed
heating and/or cooling system.
Heating system 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
heating and/or cooling system.
setting is set
below the room
temperature
(“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.

69-1726—1

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.

69-1726—1

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.

69-1726—1

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
55422 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.
1985 Douglas Drive North
Golden Valley, MN 55422

69-1726—1

G.H.

08-04

Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9

www.honeywell.com/yourhome

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