Honeywell CT2095 User Manual
Honeywell/20
Programmable Thermostat
OWNER’S GUIDE
Weekday/Weekend (5-day/2-day)
Programmable Heat and/or Cool
Low Voltage (20 to 30 Vac)
Thermostat and Mountin g Plate
Place Bar Code Here
Model CT2095
69- 1385
Welcome to the world of comfort and energy
M3701
MERCURY
SWITCH
savings with your new Hone ywell
Programmable Thermostat.
Your new thermostat will automatically control
the temperature in your home, keeping you
comfortable while saving energy when
programmed according to the instructions in
this manual.
Direct any questions concerning the application
of this thermostat to Honeywell Consumer
Services at 1-800-468-1502, Monday-Friday,
7:00 a.m.-5:30 p.m., Central time.
MERCURY NOTICE
If this thermostat is replacing a thermostat that contains mercury in a sealed
tube, do
the trash. Dispose of pr operly.
Contact your local waste management
authority for instructions regarding recycling and the prop er disposal of your ol d
thermostat. If you have questions, call
Honeywell Customer Response Center
at 1-800468-1502.
not
place your old the rmostat in
Typical location of
a mercury switch
in a thermostat.
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Contents
Step 1. Prepare for Installation ..................................................................................................... 4
Step 2. Remove Old Thermostat ..................................................................................................6
Step 3. Install Batteries ................................................................................................................ 8
Step 4. Program Thermostat ........................................................................................................ 11
Step 5. Adjust Fan Operation Switch, As Required ...................................................................... 19
Step 6. Adjust System On-Time, °F/°C, As Required ................................................................... 19
Step 7. Mount Thermostat Mounting Plate ................................................................................... 21
Step 8. Wire Thermostat Terminals ..............................................................................................23
Step 9. Mount Thermostat ............................................................................................................ 27
Step 10. Check Thermostat Operation After Programming and Installing ................................... 28
Step 11. Set Fan and System Switches ....................................................................................... 30
Troubleshooting Guide ................................................................................................................. 31
Limited One-Year Warranty .......................................................................................................... 35
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Step 1. Prepare for Installation
❑
Check Table 1 to make sure this thermostat is compatible with your system. If not, return it to the
retailer. For more information, call Honeywell Consumer Services, 1-800-468-1502, Monday Friday, 7 am to 5:30 pm, Central time.
Table 1. Compatibility Information.
System Type Compatible with CT2095
Gas—Standing Pilot Yes
Gas—Electronic Ignition Yes
Gas-Fired Boilers Yes
Gas—Millivolt No
Oil-Fired Boilers Yes
Oil-Fired Furnace Y es
Electric Furnace Yes
Electric Air Conditioning Yes
Baseboard Electric (120/240 Line Volt) No
Heat Pumps/Multistage Equipment No
Not compatible with any 120/240 volt circuit.
a
Compatible with Honeywell 2-wire zone valves. Isolating relay required for 3-wire thermostats for zone valves.
Not compatible with 2-wire White-Rodgers no. 1361 valves.
b
Compatible with hot water baseboard systems. Does not work efficiently on steam or gravity systems.
4 69-1385
a,b
a,b
❑
Acquire tools and i tem s as nee ded (see illustration). Al so pu rchase two AA alkaline batteries; we
recommend Energizer® batteries.
CROSS-RECESSED
SCREWDRIVER
HAND OR
POWER DRILL
WITH 3/16 INCH
DRILL BIT, IF NEEDED
TO DRILL HOLES
WIRE CUTTER/STRIPPER OR SHARP
KNIFE, IF NEEDED TO STRIP WIRES
IN WALL
LEVEL, IF NEEDED TO LEVEL
THERMOSTAT FOR APPEARANCE
5 69-1385
M13544
Step 2. Remove Old Thermostat
WIRES THROUGH
WALL OPENING
M5136
❑
Test to be sure your heating and cooling
systems are working properly. If either does
not work, contact your local heating/air
conditioning dealer. To avoid compressor
damage, do not operate the cooling system
when outdoor temperature is below 50°F
(10°C).
❑ Turn off power
or at the fuse/circuit breaker panel.
❑
Carefully unpack your new thermostat and
mounting plate, saving package of screws,
instructions and receipt.
❑
Remove cover from old the rmost at. If it does
not snap off when pulled firmly from the
bottom, check for a screw used to lock on
the cover.
to the system at the furnace,
❑
Loosen screws holding thermostat to
subbase, wallplate or wall, and lift away.
❑
Disconnect wires from old thermostat or
subbase. As you disconnect each wire,
attach one of the enclosed labels to each old
terminal designation. If there are only two
wires, they do not need labeling. If there is
an extra wire that is not connected to your
old thermostat, you also do not connect it to
your new thermostat. Keep the wires from
falling back into the wall by wrapping them
around a pencil as shown.
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Replacing a Clock Thermostat that has
C or C1 Clock Terminals?
If you are repl acing a H oneywel l Chronoth erm®
Thermostat, you may find one or two wires that
go to the C or C1 clock terminals on the
Chronotherm® Thermostat wiring wallplate. Do
not allow them to touch, or you can damage
your transformer. Disconnect the wires and
wrap them separately, using electrical tape.
not wrap them together
they do not interfere with the operation of the
new thermostat. Record the colors and term inal
designation labels of the remaining wires.
. Place the wires where
Do
Six or more wires?
If there are six or more wires (excluding clock
wires attached to termin als), you pr oba bly h ave
a variation of a heat pump or multistage
system. This thermostat is
not
compatible with
those systems so return the product to the
retailer. If you want information about the
programmable thermostats that work with your
system, call Honeywell Consumer Services at
1-800-468-1502.
Three thermostat wires?
If you have three w ires for heat ing onl y and can
operate the fan using the fan On switch, this
thermostat works with your system. However,
some hot water (zoned) heating systems have
three thermostat wires. The thermostat does
not work without instal lin g an is ola tin g relay on
these systems. For details, call Honeywell
Consumer Services at 1-800-468-1502.
7 69-1385
Step 3. Install Batteries
IMPORTANT
Batteries must be installed for the programming and operation of the thermostat and heating/cooling system.
❑
Purchase two AA alkaline batteries; nonalkaline batteries do not last as long, and
can leak, causing damage to the thermostat
or the wall su rface. We recommend
Energizer® batteries.
❑
Open the top cover of thermostat to access
control panel and battery compart ment.
❑
Make sure the thermostat is set to the Off
position.
❑
Use a coin to remove the battery cover.
BATTERY
DOOR COVER
REMOVING
BATTERY
DOOR
8 69-1385
M12492
❑
Install the fresh batteries as shown, making
sure positive and negative terminals are
oriented correctly.
❑
Replace the battery cover.
After the batteries are completely dead, the
bAtLo indication disappears, leaving a
completely blank display.
As the batteries run low, a bAt Lo indicator
flashes for one to two months before the
batteries run out completely. Replace the
batteries as soon as possibl e after the ind icator
starts flashing. If you do not replace the
batteries sometime during the flashing bAt Lo,
the indicator eventually stops flashing. bAt Lo
then stays on without flashing, indicating the
thermostat and heating/cooling system have
stopped working and the batteries are almost
completely dead.
INSTALL TWO AA ALKALINE
BATTERIES AS SHOWN
M1713
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Press down on the left ends of batteries to
remove them. If you insert the new batteries
within 20 to 30 seconds of removing the old
ones, you do not need to reprogram the
thermostat. Howeve r, if the display is bl ank, the
batteries are dead or incorrectly installed and
you must reprogram. See Step 4.
IMPORTANT
Although the thermos tat has a l ow b attery indicator, replace the batteries
once a year to prevent the thermostat
and heating/cooling system from shutting down due to lack of batte ry po w er.
As a precaution, when leaving home
for longer than a month, change batteries before you leave to prevent the
system from shutting down due to l ack
of battery power.
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Step 4. Program Thermostat
After the batteries are installed, the thermostat
can be easily programmed in your hand before
it is installed on the wall.
If you prefer to p rogram the thermost at after it is
installed on the wall, go to Step 7 and return
later to this programming section.
The Personal Programming Ch art, T abl es 2 and
3, may be helpful for planning your program
schedule of time and temperature settings for
various times of the day.
Four time periods are available during
weekdays — WAKE, LEAVE, RETURN, and
SLEEP; view these periods individually on the
display as you press the Weekday key.
• WAKE is the time period you want the hous e
at a comfortable temperature when you get
up and while you get ready for work or
school. (This is a higher temperature during
heating season an d a low er temper ature during cooling season.)
• LEAVE is the time period you can set for an
energy-saving temperature while you are
away at work or school. (This is a lower temperature during heating s eason an d a higher
temperature during cooli ng sea so n.)
• RETURN is the time period you want the
house at a comfort able tem perature fo r activities before bedtime. (This is a higher temperature during heating season and a lower
temperature during cooli ng sea so n.)
• SLEEP is the time period you can set for an
energy-saving temperature while you are
sleeping. (This is a lower tempe rature during
the heating season and a higher temperature during the cooling season.)
11 69-1385
Set one schedule for wee kday s and anot her for
weekends because your r equiremen ts are
usually different for each. Also, during weekends, only the WAKE and SLEEP time periods
are available.
Fill in the times a nd tempera tures you desire f or
weekdays and weekends. If you decide not to
program the thermostat, it automatically controls heating at 68°F (20°C), and cooling at 78°F
(26°C), 24 hours a day. Also, you do not need to
enter a time and temperature program for all
periods if your sc he dul e d oes n ot require it. For
example, a house th at i s occ up ied du ring weekdays would require programs only for WAKE
and SLEEP.
If no program is entered for the weekends, the
thermostat operates on the weekday SLEEP
program all weekend.
Before programming, remove the clear plastic
overlay cov ering the display.
When pressing the keys, use the ball of your
finger or a soft pencil eraser. Using sharp fingernails or pencil points can damage the keypad.
If you make an err or at any time du ring programming, just press the Run Program key, and
continue again at the previous step in your
sequence.
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