Honeywell T8400C Support Question
Honeywell T8400C Support Question
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Question posted by camidjez on August 18th, 2014
How To Set A Honeywell Thermostat Model Number T8400c 1008
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Current Answers
Answer #1: Posted by BusterDoogen on August 24th, 2014 11:49 AM
BusterDoogen
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October 30th, 2011 Points: 28,565,437
Member since:
October 30th, 2011 Points: 28,565,437
Go to page 3 -5 for the settings procedure.
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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
... for you with a more comfortable and convenient living environment.
• Simple and easy to change your temperature setting.
• Large digital display. Over 100 years of Honeywell engineering expertise went into the making of your temperature settings are not required because your new thermostat! Congratulations on the purchase of this thermostat in memory.
69-1490
2
Owner's Manual - Page 3
..., the fan may start a few minutes after
the heating equipment comes on with the cooling equipment. 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...
Owner's Manual - Page 4
... cooling (air conditioning). SYSTEM SWITCH
M10274
69-1490
4 SYSTEM Cool Off Heat Em.Ht.
Then set the SYSTEM switch:
Cool: Normal setting for months when your home
needs heating. Ht.: (Not available on all models.) Switch to this
setting when your home needs heat, but your
equipment has failed or is on . Digital display...
Owner's Manual - Page 5
... either Em Ht or Aux Ht when these modes are not available on all models.
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. Em Ht: Aux Ht:
The ▲ indicator points to help...
Owner's Manual - Page 6
... display. The ▼ indicator points to Set when the temperature setting is displayed.
1.
Set
Room
INDICATOR
M18441
69-1490
6 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...
Owner's Manual - Page 7
...; key. When in the cooling mode, raising the temperature before you leave for work or school also lowers your energy costs. Set
Room
M18443
7
69-1490 To raise the temperature setting, press the ▲ key. When in the heating mode, lowering the temperature at night or during the day can lower your...
Owner's Manual - Page 8
... in the heating mode by raising the temperature setting during the day. With this thermostat in the cooling mode by lowering the temperature setting 5°F (3°C) to 33% depending on your energy savings temperature settings. Savings can be conveniently programmed to consider purchasing the Honeywell Chronotherm® Programmable Thermostat. You can also save energy.
69-1490...
Owner's Manual - Page 10
....
See equipment manufacturer instructions. Troubleshooting Guide
CAUTION
To avoid possible equipment damage, do not operate cooling when outside temperature is set to Heat or Cool.
• Check the system fuse or circuit breaker and replace or reset if necessary.
•...▲ or ▼ key.
69-1490
10
Heating or cooling does not come on the thermostat is below 50°F (10°C).
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
... chimneys. - Heating cycle rate is powered directly from heat to cool. The T8400C SUPER TRADELINE® model also includes two decorator cover plates for wiring and mounting thermostat) and owner's guide. Contact your local waste management authority for all models.
Do not install the thermostat where it carefully.
® U.S. drafts or dead spots behind the...
Installation Instructions - Page 2
... powered directly from affecting the thermostat; NOTE: To ensure proper mounting of thermostat, restrict all wiring to wall.
69-1480-1
2 T8400C AND T8401C ELECTRONIC THERMOSTATS
YES NO
NO 5 FEET
[1.5 METERS]
NO
M10308
Fig. 1. see Fig. 2) as follows:
1. Mount decorator cover plate (SUPER TRADELINE® model only), wallplate, T8400C or T8401C, and the screws provided (see Wiring...
Installation Instructions - Page 3
...
L2
COOLING CONTACTOR
HEATING PRIMARY CONTROL
FAN RELAY
1 POWER SUPPLY. Set
Room
Set
Room
FAN Auto On
SYSTEM Cool Off Heat
FAN Auto
SYSTEM Cool Off Heat
A ENGAGE TABS AT TOP
OF THERMOSTAT WITH SLOTS ON WALLPLATE. Use for most systems).
Mounting thermostat wallplate. T8400C/T8401C heat-cool wiring diagram in single transformer system with...
Installation Instructions - Page 4
..., press either the s or t key once.
if heat is on, t key turns it on . T8400C AND T8401C ELECTRONIC THERMOSTATS
Slide the FAN switch in the bottom left corner of the thermostat to the desired mode. The t indicator points to Set when the temperature setpoint is displayed and to Room when the room temperature is...
Installation Instructions - Page 5
3.
T8400C AND T8401C ELECTRONIC THERMOSTATS
10. M14687
4. M14689
6. If the desired cycle is displayed, press the s key to raise the temperature setting several degrees ...the heating equipment should run continuously.
2.
A typical example is shown, but CC varies by model. (This information is shown, but information displayed varies by the heating equipment and may cause ...
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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