Honeywell T8401C1015 Support Question
Honeywell T8401C1015 Support Question
Find answers below for this question about Honeywell T8401C1015 - Electronic Thermostat - 1 Heat/1Cool.Need a Honeywell T8401C1015 manual? We have 1 online manual for this item!
Question posted by bssommers on November 3rd, 2010
Thermostat Set Point Temperature Is Never Being Reached.
I have set my thermostats Set point to 72F, however my furnace will not heat the house to that temp. My room temp says 64F and if the room temp dips below that the furnace will kick on and heat thouse back up to that temperature (so I don't believe it is the furnace). Is there some key sequence that I'm missing to get the Set point to take? (Honeywell T8401C1015 Thermostat)
Current Answers
Related Honeywell T8401C1015 Manual Pages
Installation Instructions - Page 1
T8400C, T8401C Electronic Thermostats
INSTALLATION INSTRUCTIONS
The T8400C and T8401C Thermostats provide singlestage, non-programmable temperature control for 24V heating-cooling systems with manual changeover from the sun or appliances. -
Can shock individuals or short equipment circuitry. radiant heat from heat to make sure the product is suitable for your old control in ...
Installation Instructions - Page 2
...the correct setting for typical wiring hookups.
either method is an electric heat system, set the switch to turn on immediately with local electrical codes and ordinances. Setting Fan Operation...equipment damage. See Fig. 5. Typical location of thermostat.
The E setting allows the fan to the E position. T8400C, T8401C ELECTRONIC THERMOSTATS
YES NO
NO 5 FEET
[1.5 METERS]
NO
...
Installation Instructions - Page 3
... A TWO TRANSFORMER SYSTEM.
3 CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT PUMP SYSTEMS.
4 POWER TO R TERMINAL IS REQUIRED WHEN THE SYSTEM SWITCH
IS ... DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER.
M12562A
Fig. 7.
T8400C, T8401C ELECTRONIC THERMOSTATS
KEEP WIRING IN SHADED AREA
G
Rc
R
W B
Y O
MOUNTING SCREW HOLE
WIRING ENTRANCE HOLE
...
Installation Instructions - Page 4
...FAN and SYSTEM Switches
Fan and system settings are : On: The fan runs continuously.
Mounting Thermostat to latch. Set Room
AuFtAoNOn
CooSlYOSfTf EHMeat
B PRESS LOWER EDGE OF CASE TO LATCH.
M20881
Fig. 9. Mounting thermostat wallplate. T8400C, T8401C ELECTRONIC THERMOSTATS
G C
R
W
B
Y
O
1
L1
(HOT)
24V
L2
TRANSFORMER
HEAT RELAY
COOL RELAY
FAN RELAY
1 POWER SUPPLY...
Installation Instructions - Page 5
... to 11°C. Examples: System setting at COOL: If cool is off, ▼ turns it off . INCREASE SETTING DECREASE SETTING
T8400C, T8401C ELECTRONIC THERMOSTATS
3. Set Temperature Setpoint
NOTE: Temperature setpoint range is displayed. .
INDICATOR
Set
Room
ROOM TEMPERATURE
SETPOINT TEMPERATURE
M14679
To set the °F/°C indication, the heat cycle rate and the C3/C1...
Installation Instructions - Page 6
...-1740
6 bRefer to lower the temperature setting below the room temperature. Operating at too low of the ▲ key momentarily displays 01. This information is displayed. Heating Cycle Rates. Press the ▲ key to save all changes, exit installer setup mode and return to display °C or °F.
T8400C, T8401C ELECTRONIC THERMOSTATS
NOTE:
In installer setup mode...
Installation Instructions - Page 7
... to Auto. T8400C, T8401C ELECTRONIC THERMOSTATS
Fan
1. Slide the FAN switch to raise the temperature setting above the room temperature. NOTE: To bypass the five-minute delay, see the Optional System Checkout section.
The fan should shut down. In cooling, the fan starts and stops with the heating equipment. When using an electric heat thermostat, the fan starts and...
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