Honeywell T8775C1005 Support Question
Honeywell T8775C1005 Support Question
Find answers below for this question about Honeywell T8775C1005 - Digital Round 24V.Need a Honeywell T8775C1005 manual? We have 2 online manuals for this item!
Question posted by ladycop7y7 on July 3rd, 2018
When On Cool The Screen Turns Dark
When I put the thermostat on "cool" the screen turns dark. On "heat" it lights up..
Current Answers
Answer #1: Posted by Odin on July 3rd, 2018 9:48 AM
Odin
Member since:
April 10th, 2010 Points: 41,236,690
Member since:
April 10th, 2010 Points: 41,236,690
See https://www.manualslib.com/manual/502514/Honeywell-T8775c-The-Digital-Round.html?page=4#manual for changing the backlight.
Hope this is useful. Please don't forget to click the Accept This Answer button if you do accept it. My aim is to provide reliable helpful answers, not just a lot of them. See https://www.helpowl.com/profile/Odin.
Related Honeywell T8775C1005 Manual Pages
Owner's Manual - Page 1
All Rights Reserved
69-1679EF-1 T8775A,C The Digital Round™ Non-Programmable Thermostats
OWNER'S GUIDE
® U.S. Registered Trademark Patents Pending © 2004 Honeywell International Inc.
Owner's Manual - Page 2
DISPLAYS AND ADJUSTS
TEMPERATURE SETTING/TURNS
BACKLIGHT ON
M19470
Fig. 1. T8775 Thermostat (features and operation).
69-1679EF-1
2
DISPLAYS ROOM OR SET TEMPERATURE
SHOWS THAT THE CURRENT TEMPERATURE SETTING IS DISPLAYED. (T8775C ONLY) SELECTS COOL/OFF/HEAT
(T8775C ONLY) SELECTS ON/AUTO
ROOM
SHOWS THAT THE
SET
CURRENT ROOM
TEMPERATURE
IS DISPLAYED.
Owner's Manual - Page 3
SET THE SYSTEM SWITCH: ❑ Heat: The thermostat controls your heating system. ❑ Off: Both heating and cooling systems are controlled by using SYSTEM and FAN switches located on the top of the thermostat (see Fig. 1).
Operating Your Thermostat
NOTE: Batteries are not required because the temperature setting is held permanently in cooling mode when the outdoor temperature is...
Owner's Manual - Page 4
... 90°F (4°C to 32°C) in heating and 45°F to 99°F
(7°C to 37°C) in Fig. 1. Backlit Display
❑ The backlight can be turned on by turning the dial, or by pushing the backlight button as shown in cooling (T8775C only).
❑ Turn the dial one click to display the current...
Owner's Manual - Page 5
... dial counterclockwise.
❑ To raise the temperature setting, turn the dial clockwise.
Heating or cooling does not come on.
❑ Make sure that the SYSTEM switch on the thermostat is below 50°F (10°C). Do not operate cooling when outside temperature is set to Heat or Cool (T8775C only).
5
69-1679EF-1
See equipment manufacturer instructions. Troubleshooting...
Owner's Manual - Page 6
❑ In heating, make sure the temperature setting is above the room temperature and the flame is present in...the compressor is present in the display.
❑ In cooling, make sure the temperature setting is below the room temperature and a solid snowflake is running, the thermostat will flash during this thermostat, call for cooling is made before the compressor has been off for air ...
Installation Instructions - Page 1
... air from the sun or appliances. - HOLES FOR PLASTER. HOLES FOR DRYWALL, 7/32 IN. T8775A,C
The Digital Round™ Non-Programmable Thermostats
The T8775A,C Thermostats provide single-stage temperature control for 24V systems. The T8775A,C models include a thermostat, wallplate (for instructions regarding recycling and the proper disposal of an old control containing mercury in a sealed...
Installation Instructions - Page 2
.... HEATING
1
RELAY OR
VALVE COIL
1 POWER SUPPLY. M19513
Fig. 2. Typical hookup of T8775C in heat-cool system with single transformer. Typical hookup of T8775A in heat-only...Y.
4 USE EITHER O OR B FOR HEAT PUMP CHANGEOVER. Typical hookup of T8775C in single-stage heat pump system. T8775A,C THE DIGITAL ROUND™ NON-PROGRAMMABLE THERMOSTATS
Wiring
IMPORTANT Use 18-gauge wire to wire...
Installation Instructions - Page 3
....
See Fig. 8. Fuel switch. Temperature Indication. Set Heat Cycle Rate
Use DIP switches 1 and 2 to set the heat cycle rate. See Fig. 7. FUEL SWITCH
Fig. 7. Mounting thermostat to Wallplate
ENGAGE TABS AT BOTTOM OF THERMOSTAT AND WALL PLATE. T8775A,C THE DIGITAL ROUND™ NON-PROGRAMMABLE THERMOSTATS
CUSTOMIZE THERMOSTAT
Setting Fuel Switch (T8775C only)
The fuel switch is...
Installation Instructions - Page 4
T8775A,C THE DIGITAL ROUND™ NON-PROGRAMMABLE THERMOSTATS
(T8775C ONLY) SELECTS COOL/OFF/HEAT
(T8775C ONLY) SELECTS ON/AUTO
ROOM
SHOWS THAT THE
SET
CURRENT ROOM
TEMPERATURE IS
DISPLAYED. DISPLAYS AND ADJUSTS TEMPERATURE SETPOINT/TURNS BACKLIGHT ON
M19520
Fig. 10. The thermostat controls the cooling
system. FAN Switch
Auto: On:
The fan only runs with the heating and cooling system....
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