Honeywell RTH7400, RTH7500, RET97D Owner's Manual
Programmable
RTH7400/RTH7500
Thermostat
RET97D
Series
Owner’s Manual
Read and save these
instructions.
For help please visit
yourhome.honeywell.com
Installation is Easy
1. Label wires and remove your old thermostat
2. Install and wire your new thermostat
3. 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
Do you need assistance? We are here to help.
Call 1-800-468-1502 for wiring assistance before returning
the thermostat to the store.
ATTENTION: MERCURY RECYCLING NOTICE
NO MERCUR
NE PAS JETER
This product does not contain mercury. However,
this product may replace a product that contains
Hg
Y
LE MERCURE
This thermostat contains a Lithium battery which may contain
Perchlorate material.
Perchlorate Material—special handling may apply, See www.dtsc.
ca.gov/hazardouswaste/perchlorate
NOTICE: To avoid possible compressor damage, do not run air
conditioner if the outside temperature drops below 50°F (10°C).
mercury. Mercury and products containing
mercury should not be discarded in household
trash.
For more information on how and where to
properly recycle a thermostat containing
mercury in the United States, please refer to the
Thermostat Recycling Corporation at
www.thermostat-recycle.org.
For mercury thermostat recycling in Canada,
please refer to Switch the Stat at
www.switchthestat.ca
Customer assistance
For assistance with this product, please visit
http://yourhome.honeywell.com.
Or call Honeywell Customer Care toll-free at
1-800-468-1502.
To save time, please note your model number
and date code before calling.
Pull at bottom to remove thermostat from
wallplate.
Turn thermostat over to find model number
and date code.
® U.S. Registered Trademark. Patents pending.
US Patent No. 6,595,430; 7,114,554; 7,274,972; 7,225,054 and other patents pending
M28103
2
Table of contents
Installation
Installation ............................................3
Advanced Installation .........................10
About your new thermostat
Controls and Home screen
quick reference ...................................13
Preset energy-saving schedules ........14
Programming and operation
Setting the clock .................................14
Adjusting program schedules .............15
Overriding schedules temporarily ......16
Overriding schedules permanently ....16
Auto Changeover ...............................17
Change filter .......................................17
Replace batteries ...............................18
Appendices
Troubleshooting ..................................19
Limited warranty .................................20
1 Turn Off Power to Heating/Cooling System
or
Circuit breaker
box
Heating/cooling system
power switch
3
M28100
2 Remove Old Thermostat
M28073
Remove old thermostat but leave wallplate with wires attached.
If you have an older thermostat with a
Do not remove wallplate yet
sealed mercury tube, turn to page 2
for proper disposal instructions.
Terminal
designation
C
C
3 Label Wires with Tags
Label the wires using the supplied wire labels as you disconnect them.
Wire Labels
C
C
Terminal designation
4 Separate Wallplate from New Thermostat
Remove wallplate from the new thermostat
and mount onto wall.
Wallplate
4
5 Mount Wallplate
Mount the new wallplate using the included screws and anchors.
M28094
Drill 3/16-in. holes for drywall
Drill 3/32-in. holes for plaster
6 Connect Wires
Simply match wire labels.
If labels do not match letters on the thermostat, check “Alternate Wiring
(Conventional Systems)” on page 6 and connect to terminal as shown here
(see notes, below).
We are here to help. Call 1-800-468-1502 for wiring assistance.
SCREW
INSERT WIRES
THEN TIGHTEN SCREWS
CONVENTIONAL
LABELED WIRES
WIRE HOLE
CONVENTIONAL
C
G
Y
W
RC
R
G
Y
W
R
Remove metal jumper if you have
both R and Rc wires.
5
W2
Y2
MCR28845
Alternate Wiring (Conventional Systems)
MCR32160
MCR28104A
SCREW
If labels do not match terminals, connect wires as shown here (see notes,
below).
Rc
W2
Y2
C
G
Y
W
R
3
2
2
C
G
Y
W
RC
R
W2
Y2
Remove metal jumper connecting R and Rc only if you must connect both
R and Rc wires.
If your old thermostat had both R and RH wires, remove metal jumper.
Connect the R wire to the Rc terminal, and the RH wire to the R terminal.
If your old thermostat had only 1 C or C1 wire, connect it to the C terminal.
If your old thermostat had 2 C or C1 wires, wrap each separately with
electrical tape and do not connect them.
Alternate Wiring (Heat Pump)
If labels do not match letters on thermostat, see page 7.
HEAT PUMP
O/B
RC
INSERT WIRES
THEN TIGHTEN SCREWS
LABELED WIRES
WIRE HOLE
C
G
Y
G
Y
O
Aux
HEAT PUMP
Aux
E
L
NOTE: If E and Aux
do not each have a
wire connected, use a
R
R
small piece of wire to
connect them to each
other.
6
Alternate Wiring (For Heat Pumps Only)
MCR32161
3 5
C
G
Y
3
O/B
RC
2
R
6
4
AUX
6
E
5
L
Leave metal jumper in place, connecting R & Rc terminals.
If your old thermostat had both
V and VR wires, stop now and contact a
qualified contractor for help.
If your old thermostat had separate
the
C terminal. If another wire is attached to the C terminal, stop now and
O and B wires, attach the B wire to
contact a qualified contractor for help.
If your old thermostat had
Y1, W1 and W2 wires, stop now and contact a
qualified contractor for help.
If
L terminal is used, C terminal wire must be connected (contact a
5
contractor if there is no
If
E and Aux terminals do not each have a wire connected, use a small
6
piece of wire to connect them to each other.
C wire).
7
7 Install Batteries
M28101
M28102
M28103
Install two AA alkaline batteries and remove tab.
Remove tab
Back of thermostat
8 Install Thermostat onto Wallplate
Install thermostat onto the wallplate on the wall.
9 Turn Power Back On
Turn the power back on to the heating/cooling system.
or
Circuit breaker box Heating/cooling system
power switch
8
10 Set Time and Date
1. Press s or t to set month, then press NEXT.
2. Press s or t to set day, then press NEXT.
3. Press s or t to set year, then press DONE.
4. Press s or t to set time, then press DONE to save and exit.
6
2006
Go Back Next Done
15
M28095
10:10
Done
M28096
11 If your system type is...
If your system type is:
q Single Stage Heat and Cool
Congratulations, you’re done!
If your system type is:
q Multistage Heat and Cool
q Heat Pump* without Backup Heat
q Heat Pump* with Backup Heat
q Heat Only
q Cool Only
Continue with Advanced Installation on next page to match your thermostat to
your system type.
*Heat Pump—an air conditioner that provides cooling in the summer, and also
runs in reverse in the winter to provide heating.
If you are not sure of your system type or if you have other
questions, call us toll-free at 1-800-468-1502.
This thermostat works on 24 volt or 750 mV systems. It will NOT work on
120/240 volt systems.
9
Advanced Installation
M27459
nD
20
0120
Enter System Setup
1. Press and release the left button.
2. Press and hold the center button until the screen changes (approximately
5 seconds).
System & Fan Schedule Clock & More
Changing Settings
System Fa
Function
one
M28069
Setting
1. Press the s or t button to
change the setting.
2. Press NEXT to advance to next
function.
3. Press DONE to save & exit.
NOTE: Some functions in the following pages may not appear due to previous
Go Back Next Done
0120
20
selections made.
Function Description Setting
0120 Year Setting
(first two digits)
0130 Year Setting
(second two digits)
0140 Month Setting 01 - 12 (i.e., January - December)
0150 Date Setting 01 - 31
Press the s or t button to change the setting.
20 = Year 20xx
21 = Year 21xx
01 - 99 (i.e., 2001 - 2099
10
Function Description Setting
0170 Select System Type 1 Heat/cool: Gas, oil or electric heating with central air
0180 Heating Fan Control 0 Gas or oil heat: Use this setting if you have a gas or oil
0190 Heat Pump Changeover Valve
(for heat pumps only)
0240 Heating Cycle Rate 5 Gas or oil furnace: Standard gas/oil furnace (less than 90%
0270 Emergency Heat Cycle Rate
(heat pumps only)
0300 Manual/Auto Changeover 0 Manual changeover (Heat/Cool/Off).
0320 Temperature Format (°F/°C) 0 Fahrenheit
0330 Daylight Saving Time On/Off 0 Off: No adjustment for daylight saving time.
Press the s or t button to change the setting.
conditioning.
2 Heat pump: Heat pump without backup or auxiliary heat.
3 Heat only: Gas, oil or electric heat without central air
conditioning.
4 Heat only with fan: Gas, oil or electric heat without central air
conditioning.
5 Hot water heat only (no fan): Gas, oil or hot water heat
without central air conditioning.
6 Cool only: Central air conditioning only.
7 Heat pump: Heat pump with backup or auxiliary heating.
8 Heat/Cool Multiple stages: 2 heat stages (wires on W and
W2), 2 cooling stages (wires on Y and Y2).
9 Heat/Cool Multiple stages: 2 heat stages (wires on W and
W2), 1 cooling stage (wire on Y).
10 Heat/Cool Multiple stages: 1 heat stage (wire on W), 2
cooling stages (wires on Y and Y2).
heating system (system controls fan operation).
1 Electric heat: Use this setting if you have an electric heating
system (thermostat controls fan operation).
0 Cooling changeover valve: Use this setting if you connected
a wire labeled “O” to the O/B terminal (see page 6).
1 Heating changeover valve: Use this setting if you connected
a wire labeled “B” to the O/B terminal (see page 7).
efficiency).
9 Electric furnace: Electric heating systems.
3 Heat pump, hot water or high-efficiency furnace: Hot water
system or gas furnace (more than 90% efficiency).
1 Gas/oil steam or gravity system: Steam or gravity heat
systems.
9 Electric furnace: Electric heating systems.
1 Automatic changeover (Heat/Cool/Auto/Off). Automatically
turns on Heat or Cool based on room temperature. Note:
System maintains minimum 3°F difference between heat and
cool settings.
1 Celsius
1 On: Auto-change to daylight saving time (for areas that do
not use the new 2007 DST calendar).
2 On: Auto-change to daylight saving time (2007 and beyond,
for areas that use the new 2007 DST calendar).
11
Function Description Setting
0500 Furnace Filter Change Reminder 0 Off (no reminder)
0530 Smart Response® Technology 1 On
0600 Maximum Heat Setting 90°F (other options: 40-89°F [4-32°C])
0610 Minimum Cool Setting 50°F (other options: 51-99°F [11-37°C])
0640 Clock Format 12 12-hour clock (i.e., “3:30 pm”)
Press the s or t button to change the setting.
1 Reminder in about 1 month
2 Reminder in about 3 months
3 Reminder in about 6 months
4 Reminder in about 9 months
5 Reminder in about 1 year
6 Reminder in about 3 years
0 Off
24 24-hour clock (i.e., “15:30”)
About your new thermostat
Your new Honeywell thermostat has been designed to give you many years of
reliable service and easy-to-use, push-button climate control.
• Easy-to-follow menu programming.
• One-touch temp control overrides program schedule at any time.
• Precise comfort control keeps temperature within 1°F of the level you set.
• Change/check reminder lets you know when to replace furnace filter.
• Large display with backlight is easy to read—even in the dark
12
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