Honeywell CT8775A Support Question
Honeywell CT8775A Support Question
Find answers below for this question about Honeywell CT8775A.Need a Honeywell CT8775A manual? We have 1 online manual for this item!
Question posted by Kunstmanttimm on November 6th, 2014
Thermostat Compatable With In Floor
Have in floor boiler heat . Told I can not use the Honeywell ct8775a with this system. Why not ?
Current Answers
Related Honeywell CT8775A Manual Pages
Owner's Manual - Page 1
... 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 Thermostat ...4 Step 3. Set the System and Fan Switches ...12 Step 11...
Owner's Manual - Page 2
...or cause a hazardous condition. MERCURY NOTICE
If this thermostat is held permanently in memory in the trash.
On-demand backlighting makes it easy to use.
Enjoy the benefits of The Digital RoundTM Thermostat by Honeywell.
• Simple to read display.
Contact your ...answers many of the questions that contains mercury in a sealed tube, do not place your Honeywell thermostat -
Owner's Manual - Page 3
... Stage Heat Pump Multistage Heat Pumps/Multistage Equipment
Compatibility with CT8775A
Yes No Yesa Yes Yes No No No
No No
Compatibility with CT8775C
Yes Yes Yesa Yes Yes No Yes No
Yes No
aCompatible with your system. PREPARE FOR INSTALLATION
❑ Check Table 1, the compatibility chart, to make sure the thermostat is not compatible, call Honeywell Customer Care...
Owner's Manual - Page 4
...a screw or screws that is not compatible with the operation of these systems. For information about which thermostats will not interfere with these systems, ...heating only system. • A thermostat that may have either system does not work, contact your system, call Honeywell Customer Care, at Step 4. STEP 3. If you may be used to C or C1 terminals), you have a multistage heat...
Owner's Manual - Page 5
... to three wires on a zoned hot water heating system, the CT8775A,C thermostats will work if an isolation relay is not compatible with the installation at the right. Continue with this application. 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 keep them from...
Owner's Manual - Page 6
...Mount decorator cover plate (optional) and
❑ Remove the wallplate and decorator cover plate (if used ) and wallplate to the wall, pull the
wires through
the wiring hole on the
WIRING ...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 the wall (if drywall) at the
...
Owner's Manual - Page 7
... of the decorator cover plate is pointing up.
❑ Line up with two 1/2 in . screws. Mount decorator cover plate (required) and wallplate onto electrical box (heating-cooling wallplate
shown).
7
69-1676-1 screws.
❑ Pull the wires through the wiring hole on the decorator cover plate.
❑ Place the decorator cover plate...
Owner's Manual - Page 8
... household wiring procedures, call your new thermostat.
Tighten the terminals. ❑ Plug...to help prevent drafts from
adversely affecting thermostat operation. FACTORY INSTALLED JUMPER
M19495
FOR ... thermostat wire with the corresponding
W
terminal letter on the wires when you removed the
Y
old thermostat ...Thermostat if wires will be connected to the labels you placed on your local...
Owner's Manual - Page 9
...
Connect to Terminals Connect To Terminals
on CT8775A
on the new thermostat and connect Rh to R and R to Rc.
2. installation.
If wires will be connected to both R and Rc on Old and New Thermostats. Connect O to a single stage heat pump.
W - - -
- Tape off B with electrical tape and do not use .
9
69-1676-1 If wires were connected...
Owner's Manual - Page 10
... correct setting for gas or oil systems. If you have an electric heat system, or a heat pump, set in the F position.
FUEL SWITCH
M19497
Fig. 3. NOTE: The CT8775A,C Thermostats will provide optimal temperature control if DIP switches 1 and 2 are set according to set the heat cycle rate. DIP switch.
10 This is connected.
CUSTOMIZE THE...
Owner's Manual - Page 11
Heat Cycle Rate.
MOUNT THE THERMOSTAT
ENGAGE TABS AT BOTTOM OF THERMOSTAT AND WALL PLATE. NOTE: The cooling cycle rate does not require adjustment and therefore cannot be changed. Fahrenheit/Celsius Indication
❑ Use...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
...
Owner's Manual - Page 12
Use for most homes. STEP 10.
CT8775 Thermostat (features and operation).
12 The fan only runs with the heating and cooling system. ❑ Fan On: The fan runs continuously. SET THE SYSTEM AND FAN SWITCHES (CT8775C ONLY)
System Switch (see Fig. 5)
❑ Fan Auto: ...
Owner's Manual - Page 13
... be turned on . ❑ Turn the dial counterclockwise to lower the temperature setting below the room temperature. ❑ The flame will switch to indicate the thermostat has ended the call for heating.
Adjust Temperature Setting
❑ Turn the dial clockwise to lower the temperature setting. Room Temperature Display.
Owner's Manual - Page 14
.... The cooling system should run continuously. ❑ Slide the Fan switch to indicate the thermostat has ended the call for cooling. The fan should turn on.
❑ Turn the dial... the room temperature. ❑ The snowflake will go into a five-minute delay to indicate the thermostat has called for five minutes, or if a power interruption occurs while the compressor is made before ...
Owner's Manual - Page 15
.... For additional information, go to Table 2 or the wiring diagrams.
• Make sure the thermostat is mounted and latched on back of heating/cooling system (example: Gas, oil, or electric; Refer to www.honeywell.com/yourhome or call Honeywell Customer Care, toll free, at the equipment is wired correctly.
Before calling, please have the...
Owner's Manual - Page 16
...COIL
FAN RELAY
1 POWER SUPPLY. 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. M19452
16
PROVIDE DISCONNECT MEANS AND OVERLOAD ...INSTALLED JUMPER.
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER.
Wiring Diagrams
R W
1
HEATING
RELAY OR
VALVE COIL
1 POWER SUPPLY.
Owner's Manual - Page 17
...
1
RELAY OR VALVE COIL
FAN
RELAY
1
1 POWER SUPPLY. 4
O
Rc 2
R
B G Y3 W
COMPRESSOR CONTACTOR
HEAT CHANGEOVER
VALVE
1
FAN
COOL
RELAY
CHANGEOVER VALVE
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER. M19454
Notice:
This thermostat is a Class B digital apparatus that complies with Canadian Radio Interference Regulations, CRC...
Owner's Manual - Page 18
... malfunction was caused by damage which occurred while the product was 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.
Honeywells sole responsibility shall be free from defects in the possession of a consumer. THE DURATION OF ANY IMPLIED...
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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