Honeywell T87K, T8775A, T87N, T8775C User Manual

T8775A,C The Digital Round
Thermostats
OWNER’S GUIDE
® U.S. Registered Trademark Patents Pending © 2004 Honeywell International Inc. All Rights Reserved
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(T8775C ONLY) SELECTS COOL/OFF/HEAT
(T8775C ONLY) SELECTS ON/AUTO
DISPLAYS ROOM OR SET TEMPERATURE
ROOM
SET
DISPLAYS AND ADJUSTS TEMPERATURE SETTING/TURNS BACKLIGHT ON
SHOWS THAT THE CURRENT ROOM TEMPERATURE IS DISPLAYED.
SHOWS THAT THE CURRENT TEMPERATURE SETTING IS DISPLAYED.
Fig. 1. T8775 Thermostat (features and operation).
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M19470
Setting SYSTEM and FAN Switches (T8775C only)
System and Fan settings are controlled by using SYSTEM and
FAN switches located on the top of the thermostat (see Fig. 1).
IMPORTANT
SET THE SYSTEM SWITCH:
Heat: The thermostat controls your heating system.Off: Both heating and cooling systems are off.Cool: The thermostat controls your cooling system.
SET THE FAN SWITCH:
Auto: Normal setting for most homes. The fan only runs with
On: The fan runs continuously. Use for improved air
Do not operate the T8775C in cooling mode when the outdoor temperature is below 50°F (10°C), or damage to compressor could result.
the heating and cooling system.
circulation.
Operating Your Thermostat
NOTE: Batteries are not required because the temperature set-
ting is held permanently in memory.
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Backlit Display
The backlight can be turned on by turning the dial, or by
pushing the backlight button as shown in Fig. 1.
Display Temperature Setting
NOTE: Your temperature setting can be set anywhere from
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 (T8775C only)
Turn the dial one click to display
the current temperature setting. A indicator points to Set when the temperature setting is displayed. If a change to the temperature setting is not made within five seconds, the mode will switch to the room temperature display.
A indicator points to Room
when the room temperature is displayed.
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.
ROOM
SET
M19489
ROOM
SET
M19490
Adjust Temperature Setting
To lower the temperature setting, turn the dial
counterclockwise.
To raise the temperature setting, turn the dial clockwise.
Troubleshooting Guide
CAUTION
Equipment Damage Hazard. Can cause permanent damage to compressor or other equipment.
Do not operate cooling when outside temperature is below 50°F (10°C). Allow compressor to remain off for five minutes before restarting. See equipment manufacturer instructions.
Heating or cooling does not come on.
Make sure that the SYSTEM switch on the thermostat is set to
Heat or Cool (T8775C only).
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