Honeywell T8775A installation instructions Checkout, Heating, Cooling T8775C only, Fan

T8775A,C THE DIGITAL ROUND™ NON-PROGRAMMABLE THERMOSTATS

		(T8775C ONLY)
(T8775C ONLY)		SELECTS
SELECTS		ON/AUTO
COOL/OFF/HEAT
	ROOM	SHOWS THAT THE
	SET
		CURRENT ROOM
		TEMPERATURE IS
		DISPLAYED.
		SHOWS THAT THE
		CURRENT TEMPERATURE
DISPLAYS ROOM		SETPOINT IS DISPLAYED.
OR SET TEMPERATURE	DISPLAYS AND ADJUSTS
	TEMPERATURE SETPOINT/TURNS
	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 five-minute delay to protect the com- pressor. The snowflake will flash during this delay.

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.

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

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Golden Valley, MN 55422	Scarborough, Ontario
	M1V 4Z9

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