Honeywell T8090A Support Question
Honeywell T8090A Support Question
Find answers below for this question about Honeywell T8090A.Need a Honeywell T8090A manual? We have 1 online manual for this item!
Question posted by Wjvivola on October 3rd, 2020
Want To Replace An Old Honeywell Thermostat Model With A Newer Updated Model.
I want to replace a manual Honeywell Chronotherm Thermostat with an updated digital type. The model I have now is a T8090A 1023. My hot air heating system has a 2 zone system that are controlled by Low voltage Troll a Temp motors in the duct work over the furnace. Can you tell me what thermostat will operate correctly with the system I have?
Current Answers
Answer #1: Posted by Troubleshooter101 on October 4th, 2020 7:30 AM
Troubleshooter101
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Member since:
September 30th, 2015 Points: 2,927,040
Easy Honeywell Thermostat Installation
Firstly, you'll need to turn off the power. You can do this by locating your thermostat's circuit breaker and switching it to the off position.
You can remove the cover of an old Honeywell home thermostat by hand. Underneath it, you'll see the wall plate and thermostat wires. Note which wires are connected to which terminal screws, then disconnect the wires of your old thermostat. The terminal screws will be marked with letters, so label each wire you disconnect with the corresponding letter.
Remove the wall plate of your old home thermostat from the wall. You'll need to be careful with disposal, as older thermostats can contain mercury. Then, secure your new thermostat's wall plate in place using a drill, checking its position with a spirit level.
Connect the wires of your new thermostat, referring to your notes from the old thermostat's wires. You can then attach the new thermostat cover by hand.
Turn the power supply back on and check that your new thermostat is working. Referring to the instruction manual, you can then start to enjoy the variety of new settings and features your Honeywell thermostat offers.
https://www.hunker.com/12001404/how-to-replace-an-old-honeywell-thermostat
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Related Honeywell T8090A Manual Pages
Owner's Manual - Page 1
Heating or Cooling Thermostat and Wallplate or
Heating/Cooling Thermostat and Subbase
T8090A/191108A, Q682B
OWNER'S MANUAL 1
696-095-07547-4-22
Owner's Manual - Page 2
The Honeywell name is replacing a control that contains mercury in a sealed tube, do not place your new thermostat. This allows you have questions, call Honeywell Inc. Recycling Notice M3375 This control contains mercury in your new Honeywell fuel saver thermostat. Your new thermostat will automatically lower and raise the temperature in a sealed tube.
If this manual to learn how to ...
Owner's Manual - Page 3
TABLE OF CONTENTS
Features Of Your Thermostat ...4 Setting The Temperature ...7 Inserting Clock Batteries ...8 Setting The Clock ...9 Programming ...10 Troubleshooting ...14 Servicing The Thermostat ...23 Cycle Rate Adjustment ...23 Thermometer Adjustment ...24 Warranty ...27
3
69-0574-2
Owner's Manual - Page 4
....
5 CLOCK HANDS. Lift it up and
remove to set by program pins.
8 TEMPERATURE SETTING LEVERS. Lift up to adjust heat anticipator.
3 THERMOMETER. Arrow head indicates
time for
energy savings and normal temperature
periods.
2 THERMOSTAT COVER. Left (blue mark) controls the low temperature, right (red mark) controls the high temperature.
1
2
3
M8726
69-0574-2
4 Features Of Your...
Owner's Manual - Page 6
Provides mounting base, wiring connections and manual switching control for heating-only or cooling-only thermostat.
15
16 Q682B SUBBASE. Provides mounting base and wiring connections for heating/cooling thermostat.
69-0574-2
16 6
M2421
R
G
FAN ON
AUTO
O B W
Y
HEAT
COOL OFF
M719 15 191108AJ WALLPLATE.
Owner's Manual - Page 7
... you want for normal comfort periods.
NOTE: You may override the time program by setting both the red and blue levers to the temperature you are sleeping or your home is unoccupied. Setting The Temperature
For Heating:
Set the left lever (blue mark) to the same temperature set point. LOW TEMPERATURE SETTING LEVER...
Owner's Manual - Page 8
... BATTERIES; Install batteries in thermostat as shown in Fig. 2. INSTALL WITH POSITIVE ENDS UP
M7188
Fig. 2-Inserting clock batteries.
69-0574-2
8 Backup batteries may be installed to supply power to the clock by the 24 Vac transformer, by two AAA alkaline batteries (included), or by the heating or cooling control circuit. Inserting Clock...
Owner's Manual - Page 9
....
TIME INDICATOR ARROW
Daylight Savings Time
When Daylight Savings Time starts, move the minute hand carefully in a clockwise direction one hour.
Setting The Clock
Lift thermostat flip-up cover and you'll find
the 24-hour program dial, slotted in clock- Time ends, move the minute hand carefully in
a clockwise
direction...
Owner's Manual - Page 10
... PINS
THERMOSTAT COVER
PROGRAM PIN SLOT PROGRAM INDEX WHEEL
MANUAL PROGRAM ...low temperature (energy saving period). We recommend at 10:00 PM for high temperature (comfort period); Two additional sets of pins are included with the pins supplied. Before setting your thermostat. The red pins start the low-temperature period.
the blue pins start the high-temperature period; A heating...
Owner's Manual - Page 11
... dial and pull the pin straight out. Setting the Heating Program:
Decide when you must reset the pins when the seasons change. Decide when you want to change the lever positions. The half-hour head ...AM
14
BLUE
ENDS 4:00 PM
68
20
RED
SUMMER
PROGRAM TEMPERATURE PIN IN
°F
°C CONTROL
80
27
RED
75
24
BLUE
80
27
RED
75
24
BLUE
M1690B
Fig. 5-Programming examples.
...
Owner's Manual - Page 12
... savings set point.
69-0574-2
12 Setting the Cooling Program:
Decide when you want the energy savings period to start gives the air conditioner time to this time and insert a blue pin. After the red pin engages, the air conditioner will be off until room temperature rises to reach the comfort level.
Find...
Owner's Manual - Page 14
... assistance.
(continued)
14 other problem. Troubleshooting
Your Honeywell thermostat requires little or no attention. pilot flame. Firmly tighten all terminal screws. If blown or tripped, replace fuse or reset breaker.
-
Most problems can generally be in OFF or Move system switch to the following:
Problem No heat.
69-0574-2
Check
Action
- Turn Off power...
Owner's Manual - Page 15
time. position of thermostat setpoint
are not correct.
Reset to desired operating position. (continued)
15
69-0574-2 Move to desired temperatures. ... dial for correct time
occurs at programmed
May need more time to desired settings.
timer program for heating system. levers.
- Room temperatures - positions of subbase system switch.
Move setting knob clockwise only.
Owner's Manual - Page 16
... (continued). Check - If the system does not operate, call a qualified technician. If the system does not operate, call a qualified technician.
Heating system should start.
(continued)
69-0574-2
16 HEATING/COOLING SYSTEM-With system switch at HEAT, move temperature setting levers 5°F (3°C) above room temperature.
thermostat circuits. Heating system should start .
Owner's Manual - Page 19
... batteries are installed and clock still does not run . Remove thermostat from the wallplate or subbase and measure the voltage.
thermostat connections at the two C terminals. Troubleshooting (continued)
Problem
Thermostat setting and thermometer reading disagree (continued).
Clock does not run .
- Replace thermostat.
If no connections, clock needs batteries in order to the...
Owner's Manual - Page 21
... on page 8. We recommend Energizer® batteries.
1 Not applicable on model used in cooling-only system.
3 If clock is not battery powered, clock may need replacement. Check - If this Troubleshooting section has not solved the problem, call your qualified heating service technician or Honeywell Customer Assistance Center, 1-800-468-1502, Monday-Friday, 7:00 AM...
Owner's Manual - Page 22
...to 30 Vac. Install transformer with subbase terminals.
2.
Rebend spring fingers to a 45 degree angle to power 1. Replace wiring. 3. used to ensure proper contact.
2.
System power off.
1. Additional (separate) transformer
voltage. Replace thermostat.
69-0574-2
22 Clock has failed.
1.
Limit switch contacts stuck open.
4. Use additional (separate) transformer. Spring...
Owner's Manual - Page 24
...Adjustment
The thermometer has been accurately calibrated at least five minutes for cover ther- Remove thermostat cover and open the flip-up cover. Be careful not to sense area temperature, ...procedure below. Replace thermostat cover and put the system into operation. ment if it . If the readings are the same, replace cover
and put the
system into operation. Set the thermostat cover on it...
Owner's Manual - Page 26
If you call, please have questions regarding the installation and programming of furnace, old thermostat and air conditioner.
69-0574-2
26 Before you have the following information available: make and model of your Honeywell thermostat, please contact the Honeywell Customer Assistance Center at 1-800-468-1502, Monday-Friday, 7:00 AM to 5:30 PM, Central time.
Owner's Manual - Page 27
... OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. This warranty shall not apply if it is defective or malfunctions, Honeywell shall repair or replace it , postage
prepaid, to 5:30 p.m., Central time.
27
69-0574-2 THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS...
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