Honeywell CT8775C Support Question
Honeywell CT8775C Support Question
Find answers below for this question about Honeywell CT8775C.Need a Honeywell CT8775C manual? We have 1 online manual for this item!
Question posted by hopprov on January 21st, 2012
Honeywell Ct8775c With Propane-fired System
I have a Propane-fired hot water heating system. I have been using a round Honeywell CT8775C thermostat with a digital display. I now discover that it is only for electric heat. Is there a problem with continuing to use that thermostat? I have used it satisfactorily for a year.
Current Answers
Related Honeywell CT8775C Manual Pages
Owner's Manual - Page 1
... System 13 If You Have A Problem ...15 Wiring Diagrams...16
® U.S. CT8775A,C
THE DIGITAL ROUND™ NON-PROGRAMMABLE THERMOSTATS
CT8775A Heat Only Thermostat (20 to 30 Vac) and CT8775C Heating-Cooling Thermostat (20 to 30 Vac)
Para obtener un documento con las instrucciones en español, por favor visite nuestro sitio de web a: www.honeywell.com/yourhome. Remove Old...
Owner's Manual - Page 2
... easy to use.
Read these instructions can arise as you become familiar and comfortable with your local waste management authority for instructions regarding recycling and the proper disposal of a power failure. Enjoy the benefits of the art in home comfort controls.
the state of The Digital RoundTM Thermostat by Honeywell.
• Simple to read display.
Owner's Manual - Page 3
... 2-wire Honeywell zone valves.
If your system. plaster)
3
• Screws and wall anchors
• Hammer
69-1676-1
System Type Gas or Oil Warm Air Electric Warm Air Gas or Oil Hot Water Gas or Oil Steam Gas or Oil Gravity Gas Millivolt Electric Air Conditioning Baseboard Electric (120/240 line volt)b Single Stage Heat Pump Multistage Heat Pumps...
Owner's Manual - Page 4
... to Step 4. Continue with the operation of purchase. This thermostat is connected to three wires on the cover. ❑ Loosen the screw or screws (if present) holding the thermostat to the system at 1-800-468-1502.
69-1676-1
4 If either one or two wires connected to three wires on a zoned hot water heating system. SPECIAL INSTALLATIONS...
Owner's Manual - Page 5
... the wall or onto an electrical box.
❑ To mount directly to the place of purchase. WIRES THROUGH WALL OPENING
STEP 5. Replacing a thermostat that is connected to three wires on a zoned hot water heating system
If you are replacing a thermostat that is connected to three wires on a zoned hot water heating system, the CT8775A,C thermostats will work if an isolation...
Owner's Manual - Page 6
...the wallplate over the
screw holes.
❑ Attach the decorator cover plate (if used ) wallplate directly to wall (heating-cooling wallplate
and drill two 3/16 in . locations you marked. holes where marked...UP indicator on the wallplate is
WALL ANCHORS (2) DECORATOR COVER PLATE
pointing up . ❑ Use a pencil to mark the center of the
wallplate line up with two 1-in . Mount Decorator...
Owner's Manual - Page 7
...plate with two 1/2 in .
. screws. Mount decorator cover plate (required) and wallplate onto electrical box (heating-cooling wallplate
shown).
7
69-1676-1 Turn the wallplate until the wiring holes are aligned and...;A».
Mount Decorator Cover Plate (Required) and Wallplate onto Electrical Box
❑ Pull the wires through the wiring hole on the decorator cover plate.
❑...
Owner's Manual - Page 8
...connections are both of your old thermostat wire with the corresponding
W
terminal letter on the wires when you placed on your local
R
heating/air conditioning contractor. FOR WRAPAROUND ...-installed jumper connecting terminals R and Rc on the CT8775C Thermostat if wires will be connected to the labels you removed the
Y
old thermostat (see illustration).
❑ Match the letter of ...
Owner's Manual - Page 9
... old thermostat, remove jumper between R and Rc. 3. Power for cooling
Heat Cooling Fan Changeover in heat. (Single stage heat pump only). installation. cal tape and do not use . 4.
Do not connect. Second stage cool. NOTES:
1. Tape off wire with electri- Table 2. W - - -
- Terminal Designations on CT8775C
R
R (see Note 3)
Do not connect. Transformer common
Do not continue
Do...
Owner's Manual - Page 10
... Fig. 3). This is factory set the switch to your particular heating system. The fuel switch is the correct setting for gas or oil systems. If you have an electric heat system, or a heat pump, set in the F position.
STEP 8. CUSTOMIZE THE THERMOSTAT
Set Fuel Switch (CT8775C Only)
❑ To adjust the fuel switch, locate the switch...
Owner's Manual - Page 11
... Air (90%+ efficiency), Hot Water, Heat Pump 3
On
On
Off
On
Gas or Oil Warm Air (factory setting) Electric Warm Air In Floor Radiant Heat
6
Off
Off
9
On
Off
Check with manufacturer for recommended cycle rate.
See Table 4. Fahrenheit/Celsius Indication
❑ Use DIP switch 3 to set the desired temperature indication. Fahrenheit/Celsius Display Fahrenheit (factory setting...
Owner's Manual - Page 12
...) SELECTS COOL/OFF/HEAT
(CT8775C ONLY) SELECTS ON/AUTO
ROOM SET
SHOWS THAT THE
CURRENT ROOM
TEMPERATURE IS
DISPLAYED
DISPLAYS ROOM OR SET TEMPERATURE
SHOWS THAT THE CURRENT TEMPERATURE SETTING IS DISPLAYED
DISPLAYS AND ADJUSTS TEMPERATURE SETTING/ TURNS BACKLIGHT ON
M19512
Fig. 5. STEP 10. Fan Switch (see Fig. 5)
❑ Heat: The thermostat controls your heating system. ❑ Off...
Owner's Manual - Page 13
...
❑ If a change to the temperature setting is held permanently in the display to the room temperature display (see Fig. 6). Room Temperature Display. Adjust Temperature Setting
❑ Turn the dial clockwise to indicate the thermostat has ended the call for heating. The heating system should turn on by turning the dial, or pushing the backlight button...
Owner's Manual - Page 14
...; After five minutes, the thermostat will display a solid snowflake to protect the compressor. Fan (CT8775C Only)
❑ Slide the...continuously. ❑ Slide the Fan switch to lower the temperature setting several degrees below 50°F (10°C). Can cause permanent damage to On. Do not operate cooling when outside temperature is made before restarting. Cooling System (CT8775C...
Owner's Manual - Page 15
... the Off position. • Wait five minutes for heating. warm air, hot water, heat pump, steam or gravity).
• Location and number of wires connected to On if it to the thermostat.
15
69-1676-1 Solution Guide. Heating does not come on .
• Set the system switch to Cool (CT8775C only). • Make sure the temperature setting...
Owner's Manual - Page 16
...M19452
16
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER. M19451
69-1676-1
O
B
2 Rc
G
R
Y
W
1
HEATING
COMPRESSOR FAN
RELAY OR VALVE COIL
CONTACTOR RELAY
1 POWER SUPPLY. Wiring Diagrams
R W
1
HEATING
RELAY OR
VALVE COIL
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER...
Owner's Manual - Page 17
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER.
M19453
3 USE A JUMPER WIRE (NOT SUPPLIED) TO CONNECT W TO Y.
4 USE EITHER O OR B FOR HEAT PUMP CHANGEOVER. M19454
Notice:
This thermostat is a Class B digital apparatus that complies with Canadian Radio Interference Regulations, CRC c. 1374.
17
69-1676-1 O
B
Rc 2
G
R
Y
W
COMPRESSOR ...
Owner's Manual - Page 18
... allow the exclusion or limitation of incidental or consequential damages, so this warranty, please write Honeywell Customer Care, 1885 Douglas Dr. N., Golden Valley, MN 55422-3992. THE DURATION OF ...
This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was in the workmanship or materials, under normal use and service, for a period of one (1) year from...
Owner's Manual - Page 20
Automation and Control Solutions
Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario
M1V 4Z9
69-1676-1 J.S. Rev. 6-04
www.honeywell.com/yourhome
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