Honeywell T8400C Support Question
Honeywell T8400C Support Question
Find answers below for this question about Honeywell T8400C.Need a Honeywell T8400C manual? We have 2 online manuals for this item!
Question posted by tedmusnicki on July 15th, 2018
Our Thermostat Screen T8400c 1024/u Went Blank .we Understand That Thi Thermos
We understand that this thermostat Is opsolet ,what we should replace With? .
Current Answers
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
Batteries are not required because your temperature setting.
• Large digital display. Congratulations on the purchase of this thermostat in memory.
69-1490
2 Over 100 years of Honeywell engineering expertise went into the making of your new thermostat! You can easily read the current room temperature at a glance.
• No need for you with...
Owner's Manual - Page 3
... continuously.
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 improved air
circulation and air quality.
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 10... energy, but would like your energy savings temperature settings.
Energy Savings
You can save energy with this thermostat, temperature settings can be as high as 7% to 33% depending on your home, where you live...
Owner's Manual - Page 10
... 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.
• Check for air movement at the register.
• Check power to the heating or cooling equipment...or cool.
• Check that the SYSTEM switch on . Heating or cooling does not come on the thermostat is below 50°F (10°C).
Owner's Manual - Page 11
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.
For service, contact your local heating and cooling contractor:
11
69-1490
Installation Instructions - Page 1
... to make sure the product is replacing a control that contains mercury in a sealed tube, do not place your application.
3. Location
Install the thermostat about 5 ft (1.5m) above ...models. T8400C and T8401C Electronic Thermostats
INSTALLATION INSTRUCTIONS
The T8400C and T8401C Thermostats provide singlestage, non-programmable temperature control for covering wallmarks. The T8400C SUPER ...
Installation Instructions - Page 2
...
IMPORTANT Level only for appearance.
see Fig. 2) as follows:
1. The shape of the terminals permits insertion of thermostat. See Fig. 3.
1 3-7/8 IN.
T8400C AND T8401C ELECTRONIC THERMOSTATS
YES NO
NO 5 FEET
[1.5 METERS]
NO
M10308
Fig. 1. The thermostat functions normally even when not level. Mounting Decorator Cover Plate and Wallplate to prevent electrical shock or equipment...
Installation Instructions - Page 3
... settings are : On: The fan runs continuously. In heating, the fan is controlled directly by using an electric heat thermostat, the fan starts and stops with the heating equipment.
3
69-1480-1
M11232
T8400C, T8401C W Y G R
2C
1
L1
(HOT)
24V
L2
COOLING CONTACTOR
HEATING PRIMARY CONTROL
FAN RELAY
1 POWER SUPPLY. In cooling, the fan...
Installation Instructions - Page 4
...
Press the st keys simultaneously for approxi-mately five seconds as follows:
Cool: The thermostat controls the cooling system. press and hold to change the setpoint several degrees. M14680
...shown separately on the digital display, press either the s or t key once. T8400C AND T8401C ELECTRONIC THERMOSTATS
Slide the FAN switch in °F, set the temperature setpoint to 11°C.
...
Installation Instructions - Page 5
...below the room temperature. Press the s key again to change the setpoint to the thermostat. Current configuration (CC) is shown, but CC varies by model. (This information...equipment should stop.
When using an electric heat thermostat, the fan starts immediately.
3.
A typical example is displayed.
T8400C AND T8401C ELECTRONIC THERMOSTATS
10. Press the s key again to ...
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