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Popular Honeywell T8400C1099 Manual Pages
Owner's Manual - Page 1
Set
Room
FAN Auto On
Electronic Thermostat
SYSTEM Cool Off Heat
OWNER'S GUIDE
1
69-1491-1
69-1491-1
Owner's Manual - Page 2
... a more comfortable and convenient living environment.
• Simple and easy to change your temperature settings are not required because your temperature setting.
• Large digital display. Over 100 years of Honeywell engineering expertise went into the making of your new thermostat! Batteries are held permanently in an effort to provide you to use. Congratulations on...
Owner's Manual - Page 3
... SWITCH
M10273
3
69-1491-1
Use for most homes.
First set the FAN switch:
Auto: Normal setting for improved air
circulation and air quality. In cooling, the
fan goes off and on .
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.
Owner's Manual - Page 4
Off:
Both heating and cooling are off. Heat: Normal setting for months when your home
needs heating.
SYSTEM Cool Off Heat
SYSTEM SWITCH
M14228
IMPORTANT Do not... a snowflake when cooling is below 50°F (10°C), or damage to compressor could result.
4
69-1491-1
Then set the SYSTEM switch:
Cool: Normal setting for months when your home
needs cooling (air conditioning).
Owner's Manual - Page 5
... when the room temperature is displayed and to 37°C). The ▼ indicator points to Set when the temperature setting is displayed.
1.
Set
Room
INDICATOR
M18441
5
69-1491-1 To display the temperature setting on the digital display.
The temperature setting and the room temperature are shown separately on the digital display, press either the ▲...
Owner's Manual - Page 6
...
M18442
2. When in the heating mode, lowering the temperature at night or during the day can lower your energy costs. Set
Room
M18443
6
69-1491-1 Changing Temperature Setting
1. When in the cooling mode, raising the temperature before you leave for work or school also lowers your energy costs.
To raise the temperature...
Owner's Manual - Page 7
Do not operate cooling if outdoor temperature is set to compressor possible. Heating or cooling does not come on.
• Check power to manufacturer's recommendations. For compressor protection on the thermostat is below 50°F (10°C). Troubleshooting Guide
CAUTION
Operating at too low of an outdoor temperature may cause compressor damage. Refer to the...
Owner's Manual - Page 8
Automation and Control Solutions
Honeywell
Honeywell Limited- If you have questions concerning this thermostat, call Honeywell Customer Assistance at the register.
Rev. 11-02 Printed in U.S.A.
Registered Trademark
www.honeywell.com/yourhome • Check the system fuse or circuit breaker and replace or reset if necessary.
• Check for air movement at 1-800-468-1502. ...
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