Honeywell Home RTH111, RTH111B1042 Owner's Manual

Non­Programmable
Thermostat

RTH111

Series

RTH111B1042

Owner’s Manual

Read before installing

For help please visit
honeywellhome.com

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

Heat Off Cool

Fan

Auto On

Do you need assistance? We are here to help.

Call 18004681502 for wiring assistance before
returning the thermostat to the store.

This thermostat cannot be used on heat pumps with
backup heat or on multistage systems.

ATTENTION: MERCURY RECYCLING

SANS MERCURE

M32707

NOTICE

This product does not contain mercury.

Hg

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

NO MERCURY

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

NOTICE: To avoid possible compressor damage, do not run air
conditioner if the outside temperature drops below 50 °F (10 °C).

Customer assistance

For assistance with this product, please visit

honeywellhome.com

Or call Resideo 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.

RTHXXXX

2

Table of contents

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

1 Turn Off Power to Heating/Cooling System

or

Circuit breaker

box

Heating/cooling system

power switch

3

2 Remove Old Thermostat

M32731

Remove old thermostat but leave wallplate with wires attached.

If you have an older thermostat with

Do not remove wallplate yet

a 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

www.honeywellhome.com

Terminal designation

4 Separate Wallplate from New Thermostat

Remove wallplate from the new thermostat and mount onto wall.

TO REMOVE WALLPLATE

PULL HERE

Wallplate

4

5 Mount Wallplate

M32714

Mount the new wallplate using the included screws and anchors.

Not

W/

Used

Aux

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).

WIRE
HOLE

LABELED
WIRES

R

Remove metal
jumper if you
have both R and

Rc wires.

INSERT WIRES

AND TIGHTEN

SCREWS

SCREW

G

Y

W

Not

W

Used

We are here to help. Call 18004681502 for wiring assistance.

5

Alternate Wiring

M32734

If labels do not match letters on the thermostat, check the chart below and
connect to terminal as shown here (see notes, below).

44

NOT

B O G Y

W

R Rc

USED

If wires will be connected to both R and Rc terminals, remove metal
jumper.

Do not use C or X. Wrap bare end of wire with electrical tape.

If you have a heat pump without auxiliary/backup heat connect O or 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 Y and W if you are using a heat
pump without auxiliary/backup heat.

7 Install Batteries

Install two AAA alkaline batteries.

Back of thermostat

RTHXXXX

M32707

6

8 Set fan operation switch

M32716

Move the switch to the proper setting:
Gas or Oil: For gas or oil heating systems,

leave the fan operation switch in this factory­set 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.

GAS OR OIL

ELECTRIC OR HEAT PUMP

GAS OR OIL

ELECTRIC OR HEAT PUMP

Not

W/

Used

Aux

RTHXXXX

10 Turn Power Back On

Turn the power back on to
the heating/cooling system.

Circuit breaker box Heating/cooling system

Fan

Heat Off Cool

Heat Off Cool Auto On

Fan

Auto On

M33588

or

power switch

7

11 If your system type is...

M33589

M33590

If your system type is:

q Single Stage Heat and Cool
q Heat Only or Cool Only

Congratulations, you’re done!

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 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 s and t buttons until
the display changes (approximately
5 seconds).

Changing Settings

1. Press the s or t button to
change the setting.

2. Press the s and t buttons
simultaneously for one second to
advance to the next function.

3. When the last function is
displayed, press the s and t
buttons to save any changes and
exit the menu.

Heat Off Cool

5

8

Fan

Auto On

5

Function
Setting

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

5 select your heating system and

14 select Fahrenheit or Celsius

15* select Compressor Protection settings

* 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.

Description
Press the s or t button to Setting

optimize its operation

temperature display

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.

0 Fahrenheit temperature display (°F)
1 Celsius temperature display (°C)

1 On
0 Off

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

9