Honeywell Ct8775c44471 Manual

							11 69-1676—1
Table 3.  Heat Cycle Rate.
NOTE: The cooling cycle rate does not require adjustment and therefore cannot be changed.
Fahrenheit/Celsius Indication
❑Use DIP switch 3 to set the desired temperature indication. See Table 4.
Table 4. Temperature Indication.
STEP 9. MOUNT THE THERMOSTAT
Heating System Cycles Per Hour DIP Switch 1 DIP Switch 2
Steam, Gravity 1 On On
High Efficiency Warm Air (90%+ efficiency), Hot Water, Heat Pump 3 Off On
Gas or Oil Warm Air (factory setting) 6 Off Off
Electric Warm Air 9 On Off
In Floor Radiant Heat Check with manufacturer for recommended 
cycle rate.
Fahrenheit/Celsius Display DIP Switch 3
Fahrenheit (factory setting) Off
Celsius On
M19498
ENGAGE TABS 
AT BOTTOM OF 
THERMOSTAT 
AND WALL PLATE.
PRESS UPPER
EDGE OF CASE
TO LATCH 
						

							69-1676—1 12
STEP 10. SET THE SYSTEM AND FAN SWITCHES (CT8775C ONLY)
System Switch (see Fig. 5) 
❑Heat: The thermostat controls your heating system.
❑Off: Both the heating and cooling systems are off.
❑Cool: The thermostat controls your cooling system.
Fan Switch (see Fig. 5)
❑Fan Auto: Normal setting for most homes. The fan only runs with the heating and cooling system.
❑Fan On: The fan runs continuously. Use for improved air circulation. 
Fig. 5. CT8775 Thermostat (features and operation).
ROOMSET
DISPLAYS ROOM 
OR SET TEMPERATURE
M19512
(CT8775C ONLY)
SELECTS
ON/AUTO (CT8775C ONLY)
SELECTS 
COOL/OFF/HEAT
DISPLAYS AND ADJUSTS 
TEMPERATURE SETTING/
TURNS BACKLIGHT ON
SHOWS THAT THE 
CURRENT ROOM
TEMPERATURE IS 
DISPLAYED
SHOWS THAT THE
CURRENT TEMPERATURE
SETTING IS DISPLAYED 
						

							13 69-1676—1
STEP 11. OPERATING THE THERMOSTAT
NOTE: Batteries are not required because the temperature setting is held permanently in memory.
Backlit Display
❑The backlight can be turned on by turning the dial, or pushing the backlight button (see Fig. 5).
Adjust Temperature Setting
❑Turn the dial clockwise to raise the temperature setting. Turn the dial counterclockwise to lower the temperature 
setting.
STEP 12. CHECK OPERATION OF HEATING AND/OR COOLING SYSTEM
Heating System
❑Slide the system switch to Heat and the Fan switch to Auto (CT8775C only).
❑Turn the dial clockwise to raise the temperature setting several degrees above the room temperature.
❑
A flame   will appear in the display to indicate the thermostat has called for heating. The heating system should turn on.❑Turn the dial counterclockwise to lower the temperature setting below the room temperature.
❑The flame   will disappear from the display to indicate the thermostat has ended the call for heating. The heating 
system should turn off.
Display Temperature Setting
❑Turn the dial one click to display the temperature setting (see Fig. 6). A   
indicator points to Set when the temperature setting is displayed. 
Fig. 6. Temperature Setting Display.
❑If a change to the temperature setting is not made within five seconds, the 
mode will switch to the room temperature display (see Fig. 7). A   indicator 
points to Room when the room temperature is displayed.
Fig. 7. Room Temperature Display.
ROOM
SET
M19489
ROOM
SET
M19490 
						

							69-1676—1 14
Cooling System (CT8775C Only)
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.
❑Slide the system switch to Cool and the Fan switch to Auto.
❑Turn the dial counterclockwise to lower the temperature setting several degrees below the room temperature.
NOTE: If a call for cooling is made before the compressor has been off for five minutes, or if a power interruption 
occurs while the compressor is running, the thermostat will go into a five-minute delay to protect the com-
pressor. The snowflake   will flash during this delay.
❑After five minutes, the thermostat will display a solid snowflake   to indicate the thermostat has called for cooling. 
The cooling system should turn on.
❑Turn the dial clockwise to raise the temperature setting above the room temperature.
❑The snowflake   will disappear from the display to indicate the thermostat has ended the call for cooling. The 
cooling system should turn off.
Fan (CT8775C Only)
❑Slide the system switch to Off and the fan switch to On. The fan should run continuously.
❑Slide the Fan switch to Auto. The fan should turn off. 
						

							15 69-1676—1
IF YOU HAVE A PROBLEM
Table 5. Solution Guide.
Customer Assistance
Please read and follow the provided instructions for this thermostat. For additional information, go to 
www.honeywell.com/yourhome or call Honeywell Customer Care, toll free, at 1-800-468-1502. 
Before calling, please have the following information available:
• Thermostat model number. (Located on back of thermostat).
• Thermostat date code. (Located below model number).
• Type of heating/cooling system (example: Gas, oil, or electric; warm air, hot water, heat pump, steam or gravity).
• Location and number of wires connected to the thermostat.If... Then…
Display does not appear.•Make sure the thermostat is wired correctly. Refer to Table 2 or the 
wiring diagrams.
•Make sure the thermostat is mounted and latched on the wallplate.
•Make sure the circuit breaker is not tripped, and reset it if necessary.
•Make sure the power switch at the equipment is in the On position and 
set it to On if it is in the Off position.
Temperature settings will not change 
(example: cannot set the heating higher 
or the cooling lower).•Make sure the temperature settings are:
40 to 90°F (4 to 32°C) for heating.
45 to 99°F (7 to 37°C) for cooling.
Heating does not come on.•Set the system switch to Heat (CT8775C only).
•Make sure the temperature setting is above the room temperature.
•Make sure the circuit breaker is not tripped, and reset it if necessary.
•Make sure the power switch at the equipment is in the On position, and 
set it to On if it is in the Off position.
•Wait five minutes for the system to respond.
Cooling does not come on.•Set the system switch to Cool (CT8775C only).
•Make sure the temperature setting is below the room temperature.
•Make sure the circuit breaker is not tripped, and reset it if necessary.
•Make sure the power switch at the equipment is in the On position, and 
set it to On if it is in the Off position.
•Wait five minutes for the system to respond.
System on indicator ( = heat,   = 
cool) is lit, but no warm or cool air is 
coming from the registers.Wait five minutes after seeing the flame or snowflake and check the 
registers again. If there is no warm or cool air coming from the registers, 
refer to Heating does not come on or Cooling does not come on. If all of this 
has been checked, contact your local heating and cooling contractor. 
						

							69-1676—1 16
Wiring Diagrams
  POWER SUPPLY. PROVIDE DISCONNECT MEANS
     AND OVERLOAD PROTECTION AS REQUIRED.W
R
HEATING
RELAY OR
VALVE COIL
M19450
1
1
M19451
HEATING
RELAY OR
VALVE COILFAN
RELAY
1  POWER SUPPLY.  PROVIDE DISCONNECT MEANS
     AND OVERLOAD PROTECTION AS REQUIRED.
2  FACTORY INSTALLED JUMPER.
1
2
W RRcB O
Y G
1HEATING
RELAY OR
VALVE COILCOMPRESSOR
CONTACTORFAN
RELAY
M19452
1  POWER SUPPLY.  PROVIDE DISCONNECT MEANS 
  AND OVERLOAD PROTECTION AS REQUIRED.
2  FACTORY INSTALLED JUMPER.
2
W RRcB O
Y G 
						

							17 69-1676—1
Notice:
This thermostat is a Class B digital apparatus that complies with Canadian Radio Interference Regulations, 
CRC c. 1374.
1
4
COMPRESSOR
CONTACTORHEAT
CHANGEOVER
VALVE
COOL
CHANGEOVER
VALVEFAN
RELAY
M19453
1  POWER SUPPLY.  PROVIDE DISCONNECT MEANS 
  AND OVERLOAD PROTECTION AS REQUIRED.
2  FACTORY INSTALLED JUMPER.
3  USE A JUMPER WIRE (NOT SUPPLIED) TO CONNECT W TO Y.
4  USE EITHER O OR B FOR HEAT PUMP CHANGEOVER.
3 2
W RRcB O
Y G
1
2
1HEATING
RELAY OR
VALVE COIL
COMPRESSOR
CONTACTOR
FAN
RELAY
M19454
1  POWER SUPPLY.  PROVIDE DISCONNECT MEANS 
  AND OVERLOAD PROTECTION AS REQUIRED.
  REMOVE FACTORY INSTALLED JUMPER BETWEEN R AND R
C. W R RcB O
Y G
2 
						

							69-1676—1 18
Limited One-Year Warranty
Honeywell warrants this product to be free from defects in the workmanship or materials, under normal use and service, for a period of 
one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the product is defective or 
malfunctions, Honeywell shall repair or replace it (at Honeywells option) within a reasonable period of time.
If the product is defective,
(i) return it, with a bill of sale or other dated proof of purchase, to the retailer from which you purchased it, or
(ii) package it carefully, along with proof of purchase (including date of purchase) and a short description of the malfunction, and mail it, postage 
prepaid, to the following address:
Honeywell USA Honeywell Canada:
Dock 4 — MN10-3860 Honeywell Limited/Honeywell Limitée
1885 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422-3992 Scarborough, Ontario M1V 4Z9
This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or 
malfunction was caused by damage which occurred while the product was in the possession of a consumer.
Honeywells sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL SHALL NOT BE 
LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES 
RESULTING, DIRECTLY OR INDIRECTLY FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER 
FAILURE OF THIS PRODUCT. Some states do not allow the exclusion or limitation of incidental or consequential damages, so this 
limitation may not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY 
IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, 
IS HEREBY LIMITED TO THE ONE YEAR DURATION OF THIS WARRANTY. Some states do not allow limitations on how long an 
implied warranty lasts, so the above limitation may not apply to you.
This warranty gives you specific legal rights, and you may have other rights which vary from state to state.
If you have any questions concerning this warranty, please write Honeywell Customer Care, 1885 Douglas Dr. N., Golden Valley, MN 
55422-3992. In Canada, write Retail Products ON30 Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario 
M1V 4Z9. 
						

							19 69-1676—1 
						

							69-1676—1    J.S.  Rev. 6-04 www.honeywell.com/yourhome
Automation and Control SolutionsHoneywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN  55422 Scarborough, Ontario
M1V 4Z9