Honeywell T8400C1099 Bedienungsanleitung

169-1491–1

OWNER’S GUIDE

Electronic

Thermostat

FAN SYSTEM

Auto On Cool Off Heat

Set Room

69-1491-1

269-1491–1

Congratulations on the purchase of your new thermostat!

Over 100 years of Honeywell engineering expertise went

into the making of this thermostat in an effort to provide

you with a more comfortable and convenient living

environment.

•Simple and easy to use

. The ▲ and ▼keys make it

easy for you to change your temperature setting.

•Large digital display.

You can easily read the current

room temperature at a glance.

•No need for batteries.

Batteries are not required

because your temperature settings are held perma-

nently in memory.

369-1491–1

Settings

Setting FAN and SYSTEM Switches

Fan and system settings are controlled by using FAN and

SYSTEM switches located on the bottom of the thermostat

case.

First set the FAN switch:

Auto: Normal setting for most homes. In cooling, the

fan goes off and on with the cooling equipment.

In heating, the fan may start a few minutes after

the heating equipment comes on.

On: The fan runs continuously. Use for improved air

circulation and air quality.

FAN

Auto On

FAN

SWITCH M10273

469-1491–1

Then set the SYSTEM switch:

Cool: Normal setting for months when your home

needs cooling (air conditioning). Digital display

shows a snowflake when cooling is on.

Off: Both heating and cooling are off.

Heat: Normal setting for months when your home

needs heating. Digital display shows a flame

when heating is on.

SYSTEM

Cool Off Heat

SYSTEM

SWITCH

M14228

IMPORTANT

Do not operate the T8400 and T8401 in cooling

mode when the outdoor temperature is below

F (10

C), or damage to compressor could

result.

569-1491–1

Displaying Temperature Setting

NOTE: Your temperature setting can be set anywhere

from 40°to 99°F (5°to 37°C).

The temperature setting and the room temperature are

shown separately on the digital display. The ▼ indicator

points to Set when the temperature setting is displayed

and to Room when the room temperature is displayed.

1. To display the temperature setting on the digital

display, press either the ▲or ▼key once.

Set Room

INDICATOR

M18441

669-1491–1

Changing Temperature Setting

1. To lower the temperature setting, press the ▼ key.

When in the heating mode, lowering the temperature at

night or during the day can lower your energy costs.

2. To raise the temperature setting, press the ▲ key.

When in the cooling mode, raising the temperature

before you leave for work or school also lowers your

energy costs.

Set Room

M18442

Set Room

M18443

769-1491–1

Troubleshooting Guide

CAUTION

Operating at too low of an outdoor temperature

may cause compressor damage.

Damage to compressor possible.

Do not operate cooling if outdoor temperature is

below 50°F (10°C). Refer to manufacturer’s

recommendations.

Heating or cooling does not come on.

•Check power to the heating or cooling equipment.

For compressor protection on initial startup and during

power interruptions, the T8400 and T8401 Electronic

Thermostats go into a five-minute delay.During this

delay, the cooling icon, a snowflake flashes.

•Check that the SYSTEM switch on the thermostat is set

to Heat or Cool.

•Check the system fuse or circuit breaker and replace or

reset if necessary.

•Check for air movement at the register.

Temperature setting is too warm or cool

•Adjust the temperature by pressing either the ▲or ▼

key.

If you have questions concerning this thermostat, call

Honeywell Customer Assistance at 1-800-468-1502.

69-1491-1 G.H. Rev. 11-02

Printed in U.S.A.

Honeywell Limited- Honeywell Limitée

35 Dynamic Drive

Scarborough, Ontario

M1V 4Z9

Automation and Control Solutions

Honeywell

1985 Douglas Drive North

Golden Valley, MN 55422

www.honeywell.com/yourhome

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