Honeywell T8400C Support Question
Honeywell T8400C Support Question
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Question posted by Pgrvi on November 29th, 2013
Honeywell Thermostat T8400c1099 How To Set Temperature
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Related Honeywell T8400C Manual Pages
Owner's Manual - Page 1
M18539
1
69-1490
69-1490
Set
Room
FAN Auto On
SYSTEM Cool Off Heat
M18535
Em Ht Aux Ht
Set
Room
Electronic Thermostat
OWNER'S GUIDE
FAN Auto On
SYSTEM Cool Off Heat Em.Ht.
Owner's Manual - Page 2
... years of Honeywell engineering expertise went into the making of your temperature setting.
• Large digital display. Batteries are not required because your temperature settings are held permanently in an effort to provide you to use. The ▲ and ▼ keys make it easy for batteries. You can easily read the current room temperature at a glance...
Owner's Manual - Page 3
... fan runs continuously. FAN Auto On
FAN SWITCH
M10273
3
69-1490
First set the FAN switch:
Auto: Normal setting for improved air
circulation and air quality.
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. Use for most homes.
Owner's Manual - Page 4
... your home needs heat, but your
equipment has failed or is on .
Heat: Normal setting for months when your home
needs cooling (air conditioning). SYSTEM Cool Off Heat Em.Ht. Digital display
... are off. SYSTEM SWITCH
M10274
69-1490
4 Digital display shows a flame
when heating is on . Then set the SYSTEM switch:
Cool: Normal setting for months when your home
needs heating.
Owner's Manual - Page 5
INDICATOR
Em Ht
Set
Room
M18425
5
69-1490
Em Ht: Aux Ht:
The ▲ indicator points to help handle the heating load. Em Ht and Aux Ht.... The ▲ indicator points to Aux Ht when the living space needs auxiliary backup heat to Em Ht when the SYSTEM switch is set at Em Ht. The ▲ indicator points to either Em Ht or Aux Ht when these modes are not available on all models.
Owner's Manual - Page 6
... ▼ indicator points to Set when the temperature setting is displayed.
1. The temperature setting and the room temperature are shown separately on the digital display, press either the ▲ or ▼ key once. Displaying Temperature Setting
NOTE: Your temperature setting can be set anywhere from 40° to 99°F (5° to Room when the room temperature is displayed and to 37...
Owner's Manual - Page 7
... 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. When in the heating mode, lowering the temperature at night or during the day can lower your energy costs. To raise the temperature setting, press the ▲ key.
Changing Temperature Setting
1.
Owner's Manual - Page 8
... you choose and your thermostat to automatically change the temperature setting, you leave for work or school. With this thermostat in the cooling mode by lowering the temperature setting 5°F (3°C) to 10°F (5°C) at night and during the day before you might want to consider purchasing the Honeywell Chronotherm® Programmable Thermostat.
If you like saving...
Owner's Manual - Page 9
... TO 18% 19 TO 22% 23 TO 33%
COOL
* YOUR SAVINGS DEPENDS ON HOME SIZE AND ACTUAL HEAT LOSS OR GAIN, GEOGRAPHIC LOCATION, FREQUENCY OF TEMPERATURES CHANGE, AND RANGE IN DEGREES OF CHANGE.
Owner's Manual - Page 10
... cooling does not come 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.
• Check power to the heating or cooling equipment.
• Adjust the temperature by pressing either the ▲...
Owner's Manual - Page 11
For service, contact your local heating and cooling contractor:
11
69-1490 If you have questions concerning this thermostat, call Honeywell Customer Assistance at 1-800-468-1502, Monday-Friday, 7:00 am-5:30 pm, Central time.
Owner's Manual - Page 12
Registered Trademark
69-1490 J.H. 9-00
6ww9w-1.h4o9ne0ywell.com/yourhome
12 Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422
Scarborough, Ontario M1V 4Z9
Copyright © 2000 Honeywell
All Rights Reserved
® U.S. Automation and Control Solutions
Honeywell International Inc.
Installation Instructions - Page 1
... the floor in these instructions carefully. Registered Trademark Copyright © 2002 Honeywell •
• All Rights Reserved
69- 1480- 1
T8400C and T8401C Electronic Thermostats
INSTALLATION INSTRUCTIONS
The T8400C and T8401C Thermostats provide singlestage, non-programmable temperature control for 24V heating-cooling systems with good air circulation at 1, 3, 4, 5, 6, or...
Installation Instructions - Page 2
...
See Fig. 4.
All wiring must comply with local electrical codes and ordinances.
T8400C AND T8401C ELECTRONIC THERMOSTATS
YES NO
NO 5 FEET
[1.5 METERS]
NO
M10308
Fig. 1.
See Fig....30 Vac heating-cooling systems. Refer to Wall
IMPORTANT Level only for wiring the T8400C and T8401C Thermostats. Select the two mounting holes that best fit the application.
4.
DECORATOR COVER ...
Installation Instructions - Page 3
...-cool wiring diagram in oil heating/electric cooling system. M11022B
Fig. 6. Mounting Thermostat to shaded area. Wiring connections. OPERATION
Setting FAN and SYSTEM Switches
Fan and system settings are : On: The fan runs continuously. Use for most systems). T8400C AND T8401C ELECTRONIC THERMOSTATS
KEEP WIRING IN SHADED AREA
ALTERNATE MOUNTING SCREW HOLE
W
Y G
R C
MOUNTING SCREW HOLE...
Installation Instructions - Page 4
... displayed.
69-1480-1
4 Each press changes the setpoint one degree; Each press changes the setpoint one degree; if cool is displayed in °C, set the temperature setpoint to Room when the room temperature is displayed and to 52°F. T8400C AND T8401C ELECTRONIC THERMOSTATS
Slide the FAN switch in the bottom left corner of the...
Installation Instructions - Page 5
... to change the heat cycle rate, press the t key to lower the temperature setting below the room temperature. After approximately ten seconds, the heating equipment should start . Press the t...Press the s key to the thermostat. M18419A
8. Cooling
CAUTION
Low Temperature Hazard.
Press the s key again. T8400C AND T8401C ELECTRONIC THERMOSTATS
10.
A typical example is ...
Installation Instructions - Page 6
Rev. 2-02
www.honeywell.com/yourhome Automation and Control Solutions
Honeywell
Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North
35 Dynamic Drive
Golden Valley, MN 55422
Scarborough, Ontario
M1V 4Z9
69-1480-1 G.H.
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