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PRODUCT DATA
68-0279
® U.S. Registered Trademark • Patents Pending
Copyright © 2004 Honeywell International Inc.
All Rights Reserved
T8775A,C The Digital Round
™
Non-Programmable Thermostats
APPLICATION
The T8775A and T8775C Thermostats provide single-stage,
non-programmable temperature control for 24 Vac systems
with manual changeover from heat to cool.
The T8775A controls 2-wire heating-only systems.
The T8775C controls gas, oil or electric heating and cooling
systems.
FEATURES
• Attractive styling complements any decor.
• Simple to use. Turn the dial to adjust the setpoint
temperature.
• Large easy-to-read display. The temperature reading is
easily seen from a distance.
• Backlit display. On-demand backlighting makes it easy
to read the display in a dark room or hallway.
• No batteries required. The setpoint temperature is held
permanently in memory in the event of a power failure.
• Powered through heating-cooling system controls.
• System and Fan switches on the T8775C model.
• Manual changeover from heat to cool on T8775C
model.
• Easy installation and set up saves time and increases
installer productivity.
• Easily configurable by the use of DIP switches.
• Fahrenheit or Celsius temperature display for added
flexibility.
• Selectable heating cycle rates (1, 3, 6, 9 CPH) for a
variety of applications.
• Cooling cycle rate is fixed at 3 CPH. This is the
standard compressor setting.
• Minimum off-time for the compressor in the cooling
mode. Protects and extends the life of the equipment.
• Decorative cover plate is available to cover marks on
the wall or to mount the T8775 Thermostat to an
electrical box.
Contents
Application.........................................................................1
Features ............................................................................1
Specifications ....................................................................2
Ordering Information .........................................................2
Installation .........................................................................3
Wiring ................................................................................4
Customize Thermostat ......................................................5
Set System and Fan Switches ..........................................6
Checkout ...........................................................................7
Troubleshooting Guide ......................................................8