T8775A,C THE DIGITAL ROUND™
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| (T8775C ONLY) |
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(T8775C ONLY) |
| SELECTS |
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SELECTS |
| ON/AUTO |
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COOL/OFF/HEAT |
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| ROOM | SHOWS THAT THE |
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| SET |
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| CURRENT ROOM |
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| TEMPERATURE IS |
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| DISPLAYED. |
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| SHOWS THAT THE |
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| CURRENT TEMPERATURE | |
DISPLAYS ROOM |
| SETPOINT IS DISPLAYED. | |
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OR SET TEMPERATURE | DISPLAYS AND ADJUSTS |
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| TEMPERATURE SETPOINT/TURNS |
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| BACKLIGHT ON | M19520 | |
Fig. 10. T8775 Thermostat (features and operation).
SYSTEM Switch
Heat: | The thermostat controls the heating |
Off: | system. |
Both heating and cooling systems are off. | |
Cool: | The thermostat controls the cooling |
| system. |
FAN Switch
Auto: The fan only runs with the heating and cooling system.
On: The fan runs continuously. Use for improved air circulation.
CHECKOUT
NOTE: Temperature setpoint range is 40°F to 90°F (4°C to 32°C) in heating and 45°F to 99°F
(7°C to 37°C) in cooling.
Heating
1.Slide the SYSTEM switch to Heat and the FAN switch to Auto (T8775C only).
2.Raise the temperature setpoint several degrees above the room temperature.
3.A flame 
will appear in the display and the heat should turn on.
4.Lower the temperature setpoint below the room temperature.
5.The flame 
will disappear from the display and the heat should turn off.
Cooling (T8775C only)
CAUTION
Low Temperature Hazard. Operating at too low of an outdoor temperature may cause compressor damage.
Do not operate cooling if outdoor temperature is below 50°F (10°C). Refer to manufacturer’s recommendations.
NOTE: If a call for cooling is made before the com- pressor has been off for five minutes, or if a power interruption occurs while the com- pressor is running, the thermostat will go into a
1.Slide the SYSTEM switch to Cool and the FAN switch to Auto.
2.Lower the temperature setpoint several degrees below the room temperature.
3.After approximately five minutes, the thermo-
stat will display a solid snowflake | and the |
cooling should turn on. |
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4.Raise the temperature setpoint above the room temperature.
5. The snowflake will disappear from the dis- play and the cooling should turn off.
Fan
1.Slide the SYSTEM switch to Off and the FAN switch to On. The fan should run continuously.
2.Slide the FAN switch to Auto. The fan should turn off.
Automation and Control Solutions
Honeywell International Inc. | Honeywell |
1985 Douglas Drive North | 35 Dynamic Drive |
Golden Valley, MN 55422 | Scarborough, Ontario |
| M1V 4Z9 |
Printed in Hungary | www.honeywell.com/yourhome |
