Honeywell Home RTH111B1042 User manual

RTH111B1042,
Read before installing
For help please visit
resideo.com
Heat Off Cool
Auto On
Fan
RTH111 Series
Non-Programmable
Thermostat
Owner’s Manual
Identify System Type
This thermostat is compatible with the following systems:
• Gas, oil or electric furnace
• Central air conditioner
• Hot water system with or without pump
• Millivolt system
• Central heating and cooling system
• Heat pump without auxiliary/backup heat
This thermostat cannot be used on heat pumps with backup heat or on
multistage systems.

2
NOTICE: To avoid possible compressor damage, do not run air
conditioner if the outside temperature drops below 50 °F (10 °C).
ATTENTION: MERCURY RECYCLING
NOTICE
This product does not contain mercury.
However, this product may replace a product
that contains 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
NO MERCUR
Y
NO BOTE
MERCURIO
Hg
RTHXXXX
M32707
Customer assistance
For assistance with this product, please visit
resideo.com.
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.

3
Installation
Installation.......................................................3
Advanced Installation ................................8
About your new thermostat
Controls and Home screen
quick reference...........................................10
Compressor protection...........................11
Replace batteries.......................................11
Appendices
Troubleshooting.........................................12
Limited warranty........................................13
Table of contents
1 Turn Off Power to Heating/Cooling System
or
M31535
Circuit breaker
box
Heating/cooling system
power switch

4
Do not remove wallplate yet
3 Label Wires with Tags
Label the wires using the supplied wire labels as you disconnect them.
Wire Labels
www.honeywellhome.com
C
C
MCR33823
Terminal
designation
If you have an older thermostat with
a sealed mercury tube, turn to page
2 for proper disposal instructions.
Terminal designation
C
C
MCR31537
2 Remove Old Thermostat
Remove old thermostat but leave wallplate with wires attached.
4 Separate Wallplate from New Thermostat
Remove wallplate from the new thermostat and mount onto wall.
M32731
TO REMOVE WALLPLATE
PULL HERE
Wallplate

5
5 Mount Wallplate
Mount the new wallplate using the included screws and anchors.
Drill 3/16-in. (4,76 mm ) holes for drywall
Drill 3/32-in. (2,38 mm ) holes for plaster
6 Connect Wires
Simply match wire labels.
If labels do not match letters on the thermostat, check “Alternate Wiring” on
page 6 and connect to terminal as shown (see notes, below).
W/
Aux
Not
Used
M32714
Remove metal
jumper if you
have both Rand
Rc wires.
M32732
SCREW
INSERT WIRES
AND TIGHTEN
SCREWS
WIRE
HOLE
LABELED
WIRES
W
G
R
Not
Used
W
Y

6
Alternate Wiring
If labels do not match letters on the thermostat, check the chart below and
connect to terminal as shown here (see notes, below).
If wires will be connected to both Rand Rc terminals, remove metal
jumper.
Do not use Cor X. Wrap bare end of wire with electrical tape.
If you have a heat pump without auxiliary/backup heat connect Oor B,
not both. If you do not have a heat pump, do not connect B. Wrap bare
end of wire with electrical tape.
Place a jumper (piece of wire) between Yand Wif you are using a heat
pump without auxiliary/backup heat.
7 Install Batteries
Install two AAA alkaline batteries.
Back of thermostat
RTHXXXX
M32707
B O G Y
WNOT
USED
R Rc
M32734
44

7
8 Set fan operation switch
Move the switch to the proper setting:
Gas or Oil: For gas or oil heating systems,
leave the fan operation switch in this factory-
set position (for systems that control the fan in
a call for heat).
Electric or Heat Pump: Change the switch
to this setting for heat pump or electric heat
systems. (This setting is for systems that allow
the thermostat to control the fan in a call
for heat, if a fan wire is connected to the G
terminal.)
9 Install Thermostat
onto Wallplate
Install thermostat onto the wallplate
on the wall.
RTHXXXX
M32716
GAS OR OIL
ELECTRIC OR HEAT PUMP
GAS OR OIL
ELECTRIC OR HEAT PUMP
10 Turn Power Back On
Turn the power back on to
the heating/cooling system.
M31544
or
Circuit breaker box Heating/cooling system
power switch
W/
Aux
Not
Used
M33588
Heat Off Cool Auto On
Fan
Heat Off Cool
Auto On
Fan

8
11 If your system type is...
If your system type is:
qSingle Stage Heat and Cool
qHeat Only or Cool Only
Congratulations, you’re done!
This thermostat works on single stage 24 volt or 750 mV systems. It will
NOT work on multi-stage systems.
Advanced
Installation
Enter System Setup
To enter system setup, press and
hold both the sand tbuttons until
the display changes (approximately
5 seconds).
Changing Settings
1. Press the sor tbutton to
change the setting.
2. Press the sand tbuttons
simultaneously for one second to
advance to the next function.
3. When the last function is displayed, press the sand tbuttons to save
any changes and exit the menu.
M33589
Heat Off Cool Auto On
Fan
55
M33590
Function
Setting

9
NOTE: If you do not press any button for 60 seconds while you are in the
setup menu, the thermostat automatically saves any changes made and exits
the menu.
Function
Description
Press the sor tbutton to Setting
5 select your heating system and
optimize its operation
5 Gas or oil furnace: Use this setting if you have a standard gas or
oil furnace that is less than 90% efficient.
6 Electric furnace: Use this setting if you have any type of electric
heating system.
3 Heat pump, hot water or high-efficiency furnace:
Use this setting if you have a hot water system or a gas furnace of
greater than 90% efficiency.
2 Gas/oil steam or gravity system: Use this setting if you
have a steam or gravity heat system.
14 select Fahrenheit or Celsius
temperature display
0 Fahrenheit temperature display (°F)
1 Celsius temperature display (°C)
15* select Compressor Protection settings 1 On
0 Off
* Compressor Protection: This feature forces the compressor to wait approximately 5 minutes
before restarting, to prevent equipment damage. During the wait time, the message “Cool On” or
“Heat On” is displayed on screen.
About your new thermostat
Your new Resideo thermostat has been designed to give you many years of
reliable service and easy-to-use, push-button climate control.
• Displays ambient (measured) temperature at all times
• One-touch access to setpoint temperature
• Built-in compressor protection

10
Lo
Batt
Set
Cool
77
M32763
On
M33586
Heat Off Cool Auto On
Fan
Thermostat controls
Temperature
adjustment
Press the up or
down buttons
until you reach
the desired
temperature.
NOTE: Make sure
the SYSTEM switch
is set to the system
you want to control
(Heat or Cool).
Fan Switch is used to control your fan.
In “Auto” mode, the fan runs only when the
heating or cooling system is on.
If set to “On,” the fan runs continuously.
System Switch
is used to control
your heating or
cooling system.
• Heat: Heating
system control.
• Off: All systems
off.
• Cool: Cooling
system control.
Display screen
Low battery warning
(see page 11)
Setpoint indicator
Appears when the setpoint
temperature is displayed.
Temperature
The ambient (measured)
temperature is normally
displayed. To view the
setpoint temperature,
press the Up or Down
button once. The setpoint
temperature will appear
for five seconds.
System status
Cool on: Cooling system is on.
Heat on: Heating system is on.
When Cool On is flashing, compressor
protection is engaged (see page
11).