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 teresa10731 on November 3rd, 2015
Honeywell T8400c And T8401c Thermostat Battery
I would like to know what type of battery the Honeywell T8400C and T8401C thermostat uses.
Current Answers
Answer #1: Posted by TechSupport101 on November 3rd, 2015 9:56 PM
TechSupport101
Member since:
May 24th, 2013 Points: 12,171,305
Member since:
May 24th, 2013 Points: 12,171,305
Hi. Neither of the two uses a battery. Batteries are not required because setpoints are held permanently by non- volatile memory
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
... your temperature setting.
• Large digital display. Batteries are held permanently in an effort to provide you to use. 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 The ▲ and...
Owner's Manual - Page 3
...
circulation and air quality.
In heating, the fan may start a few minutes after
the heating equipment comes on the bottom of the thermostat case. On:
The fan runs continuously. Use for most homes.
FAN Auto On
FAN SWITCH
M10273
3
69-1490 In cooling, the
fan goes off and on with the cooling...
Owner's Manual - Page 8
...;C) at night and during the day before you might want to consider purchasing the Honeywell Chronotherm® Programmable Thermostat. You can also save energy in the heating mode by raising the temperature setting ...during the day. Energy Savings
You can save energy with this thermostat, temperature settings can be as high as 7% to 33% depending on your home,...
Owner's Manual - Page 10
Heating or cooling does not come on the thermostat is below 50°F (10°C).
Temperature setting is too warm or cool.
• Check that the SYSTEM switch on . Troubleshooting Guide
CAUTION
To avoid ...
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
Automation and Control Solutions
Honeywell International Inc. 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.
Installation Instructions - Page 1
...Batteries are not required because setpoints are held permanently by : - MERCURY NOTICE
If this Product...
1. Can shock individuals or short equipment circuitry. See Fig. 1. drafts or dead spots behind the thermostat. radiant heat from heat to cool. This thermostat is powered directly from ducts. - T8400C and T8401C Electronic Thermostats
INSTALLATION INSTRUCTIONS
The T8400C and T8401C...
Installation Instructions - Page 2
... to most 4-wire, 18 to Wall
IMPORTANT Level only for wiring the T8400C and T8401C Thermostats. The T8400C Thermostat is powered through the wallplate entrance hole.
3.
Disconnect the power supply to...OR 7/32 (PLASTER OR WOOD)
WHEN USING WALL ANCHORS. M11041C
Fig. 2. see Fig. 2) as follows:
1. The shape of the terminals permits insertion of thermostat.
NOTE: Only SUPER TRADELINE® ...
Installation Instructions - Page 3
... at the top of the thermostat onto the wallplate to latch.
Use for most systems). In cooling, the fan starts and stops with the heating equipment.
3
69-1480-1 Restrict wiring to Wallplate
1.
Mounting Thermostat to shaded area.
Auto: Normal setting for improved air circulation and air quality. M11021B
Fig. 5. W
Y
T8400C, T8401C W Y G R
2C
1
L1
(HOT)
24V...
Installation Instructions - Page 4
... separately on . SYSTEM Switch
System switch settings control thermostat operation as the indicator points to light all seven steps must be used to enter installer setup mode. NOTE:
M14686
In installer setup mode only, each press of the t key momentarily displays 02. T8400C AND T8401C ELECTRONIC THERMOSTATS
Slide the FAN switch in the bottom left...
Installation Instructions - Page 5
...;C or °F. Cooling system should stop. The fan should start . In cooling, the fan starts and stops with the heating equipment. T8400C AND T8401C ELECTRONIC THERMOSTATS
10.
See Table 1 for factory use only. System Steam, radiant floor heat, gravity Hydronic heat, condensing gas furnacea Gas or oil forced air Electric heat Special applicationsb
Cycles...
Installation Instructions - Page 6
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. Rev. 2-02
www.honeywell.com/yourhome
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