Honeywell RTH3100C User manual

Operating

Manual

RTH3100C

Heat Pump Non-Programmable Digital Thermostat

69-2339EFS-01

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RTH3100C

1 69-2339EFS—01

About your new thermostat

Thermostat features...................................2

Quick reference to controls.......................3

Quick reference to display ........................4

Thermostat Operation

System switch (Heat/Cool)........................5

Fan switch (Auto/On) .................................6

Temperature controls.................................7

Compressor protection..............................8

Appendices

Battery replacement ..................................9

In case of difficulty...................................10

Customer assistance ............................... 12

Accessories............................................. .12

1-year limited warranty............................13

Table of contents

Operating Manual

69-2339EFS—01 2

Congratulations on the purchase of your new Honeywell thermostat. It has been

designed to give you many years of reliable service and easy-to-use, push-button

climate control.

Features

• One-touchtemperaturecontrols

• Large,clearbacklitdisplayiseasytoread,eveninthedark

• Switchablefancontrol(autoorcontinuousfan)

• Displaysbothroomtemperatureandtemperaturesetting

• Built-incompressorprotection

About your new thermostat

RTH3100C

3 69-2339EFS—01

About your new thermostat

M29558

Temperature adjustment

Press to adjust temperature

settings.

Fan Switch (see page 6)

On: Fan runs continuously.

Auto: Fan runs only when

heating or cooling system is on.

Quick reference to controls

System switch (see page 5)

• Cool: Cooling system control.

• Off: All systems off.

• Heat: Heating system control.

• Em Heat: Emergency & Auxiliary

Heat control. Compressor is

locked out.

Digital display screen

Operating Manual

69-2339EFS—01 4

Heat On

Set ToInside

Replace Batt

M29559

System Status

•Cool On: Cooling system is on.

•Heat On: Heating system is on.

•Em: Emergency heat is on.

•Aux: Auxiliary heat is on.

Quick reference to display screen

Current inside temperature Temperature setting

If flashing, compressor

protection is engaged

(see page 8).

Low battery warning

RTH3100C

5 69-2339EFS—01

M29558

The SYSTEM switch can be set to control

your heating or cooling system, depending

on the season.

• Cool: Cooling system control.

• Off: All systems are off.

• Heat: Heating system control.

• Em Heat: Emergency & Auxiliary Heat

control. Compressor is locked out.

System switch

Set SYSTEM switch to control the

heating or cooling system.

CAUTION: EQUIPMENT DAMAGE

HAZARD. Do not operate cooling

system when outdoor temperature

is below 50°F (10°C).

Operating Manual

69-2339EFS—01 6

M29558

Fan switch

Set the FAN switch to Auto or On.

In “Auto” mode (the most commonly used

setting), the fan runs only when the heat-

ing or cooling system is on.

If set to “On,” the fan runs continuously.

Set FAN switch to choose whether the fan

runs continuously or only as needed.

RTH3100C

7 69-2339EFS—01

About your new thermostat

M29560

Cool On

Set To

Inside

Temperature controls

Press the temperature adjustment

buttons until the temperature you want

is displayed in the upper right portion of

the screen.

Note: Make sure the SYSTEM switch is set

to the system you want to control (Heat or

Cool).

Desired

temperature

Temperature

adjustment buttons

Operating Manual

69-2339EFS—01 8

Cool On

Set ToInside

M29561

This feature helps prevent damage to the

compressor in your air conditioning or heat

pump system.

Damage can occur if the compressor is

restarted too soon after shutdown. This fea-

ture forces the compressor to wait for a few

minutes before restarting.

During the wait time, the display will flash the

message Cool On or Heat On. When the safe

wait time has elapsed, the message stops

flashing and the compressor turns on.

Message flashes until safe restart

time has elapsed.

Built-in compressor protection

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