Digital
Digital
Thermostat
Thermostat
residential
THERMOSTAT
T1100FS
7-Day
7-Day
PROGRAMMABLE
PROGRAMMABLE
up to
up to
& 2-cool
& 2-cool
HEAT
COOL
Mounts Flush with the Wall
Back-Lit display
Control up to 2 Heat & 2 Cool Stages
7-Day Programmable
4 Settings/Day
Auto Changeover
5 minute Built-In
Compressor Protection
Self-Prompting Programming
with Copy Command
Display Either F or C
Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage
Electric Cooling & 2 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.
OWNER’S
OWNER’S
MANUAL
MANUAL
Venstar Inc. 08/07
One For All Works with
Virtually All Equipment
Non-Volatile memory
Keypad lockout
Single or Dual setpoint
with Adjustable Deadband
‘O’ or ‘B’ Terminal
Optional: Outdoor Sensor
Programmable Fan
2-heat
2-heat
HEAT
PUMP
Table Of Contents
FRONT PANEL
DISPLAY
QUICK START Set the clock and go
SELECTING THE HEAT
OR COOL MODE
BASIC OPERATION
PROGRAMMING A DAILY
SCHEDULE
ADVANCED SETUP
ABOUT ADVANCED FEATURES
& OPERATION
WARRANTY
CAUTION
Follow Installation Instructions carefully.
DISCONNECT POWER TO THE HEATER AIR CONDITIONER BEFORE REMOVING
THE OLD THERMOSTAT AND INSTALLING
THE NEW THERMOSTAT.
Venstar Inc. 08/07
2
3
5
6
7
8
12
17
21
WARNING
P/N T1100FS
Page 1
Front Panel
Liquid Crystal Display
with Thermoglow
Up/Down Buttons
Mode Button
Fan Button
Heat or Cool Indicator
Red = Heat, Green = Cool
Temperature Sensor
Page 2
Display
Am
Night
Day
Service
Pm
Setup
Evening
Filter
88
o
COOL
AUTO
Outside
Locked
ONOFF
Program
HEAT
88
On
I8:88
SuMoTuWeThFrSa
Morning
Fan On
Mode Indicators - Page 6
Selects the operational mode of the equipment.
HEAT - Indicates the heating mode.
COOL - Indicates the air conditioning mode.
AUTO - Indicates the system will automatically
changeover between heat and cool modes
as the temperature varies.
PROGRAM ON - Indicates the time period
program is enabled to run.
OFF - Indicates heating and cooling are turned off.
Clock with Day of the Week - Page 5
Indicates the current time and day. This clock is
also used to program the time period schedules.
Room Temperature Display
Indicates current room temperature and displays
the outdoor temperature when connected (page 20).
Desired Set Temperature - Page 7
Indicates desired room temperature(s).
Outside icon - Page 20
Indicates the temperature displayed is from the
optional outdoor sensor.
Page 3
Display
Am
Night
Day
Service
Pm
Setup
Evening
Filter
88
o
COOL
AUTO
Outside
Locked
ONOFF
Program
HEAT
88
On
I8:88
SuMoTuWeThFrSa
Morning
Fan On
Morning, Day, Evening & Night icons - Pages 8-10
Indicates the day part of the time period program.
Setup icon - Pages 12-15
Indicates the thermostat is in the setup mode.
Fan On icon - Page 7
Indicates constant, continuous fan operation.
When Fan On is not lit - indicates the fan will only
operate when necessary to heat or to cool.
Service Filter icon - Page 15
Appears when the filter should be serviced under
normal conditions. Adjustable from 0 - 1950 hours
or blower operation.
Locked icon - Page 20
Indicates the keypad has been locked.
Page 4
Quick Start Set the Clock and Go
MODE
FAN
Press the MODE and FAN buttons
at the same time for two seconds
to enter Setup screens.
During Setup & Programming:
Pressing the UP or DOWN
bu ttons wi ll mod ify th e
Setting the Clock
Tip: To change hours quickly,
press and hold the FAN
button and press the UP or
DOWN buttons.
Setting the Day
I2:00
Am
Setup
SetupMo
flashing selection.
To adjust the
Clock or Day use
Press
MODE
buttons.
Press the MODE and
FAN buttons at the
same time to return
to normal operation.
MODE
FAN
The thermostat is preprogrammed from the factory to operate
one or two stage equipment* without the need for further
programming. To optimize the installation of this thermostat,
follow the instructions in the Advanced Setup section.
* The thermostat is not preprogrammed from the factory to operate
electric heat or heat pump systems. To control these systems,
follow the steps in the Advanced Setup section, pages 12 & 13.
Page 5
Selecting the Heat or Cool Mode
Select Mode by Pressing the MODE Button
Pm
I2:00
Heating Only
The HEAT setting indicates the
temperature the room has to
reach before the furnace will
turn on to heat the room.
Cooling Only
The COOL setting indicates the
temperature the room has to
reach before the air conditioner
will turn on to cool the room.
Heating or Cooling
AUTO will automatically select
heat or cool based on room
temperature demand.
Time Schedule for
Heating or Cooling
The Program On setting will
activate the time period
programming for the cooling
or heating setpoint ONLY
(Morning, Day, Evening
& Night Periods).
OFF indicates both heating
and air conditioning
systems are turned off.
Off
Mo
70
Pm
I2:00
Mo
70
Pm
I2:00
Mo
70
Pm
I2:00
Mo
70
Day
Pm
I2:00
Mo
70
HEAT
68
76
COOL
76
COOL
AUTO
HEAT
68
76
COOL
Program
HEAT
68
Press
MODE
Press
MODE
Press
MODE
On
Press
MODE
OFF
Page 6
Basic Operation
Selecting Your Desired Temperature
(adjusting the setpoints)
AUTO OR PROGRAM MODE
Pressing the UP or DOWN buttons in Auto or Program mode will
adjust both the heat and cool set temperatures simultaneously.
I2:00
Mo
Pm
76
COOL
AUTO
Adjust the desired
set temperature with the
70
HEAT OR COOL MODE
Pressing the UP or DOWN buttons in Heat or Cool mode will
adjust only the heat or cool set temperature.
I2:00
Mo
HEAT
68
Pm
76
COOL
buttons.
Adjust the desired
set temperature with the
70
buttons.
Using the Fan Button
Pm
I2:00
Mo
76
COOL
70
Fan On
Press
FAN
Fan On indicates constant fan
operation. You may turn the fan
on even if the thermostat is in the
Off mode. Pressing the FAN button
toggles this feature on or off.
Page 7
Programming a Daily Schedule
Press the MODE button. While holding MODE,
MODE
press the UP button for two seconds to enter
time period programming.
Use the Programming Worksheet on the back cover
to help with this section.
Select the day of week.
(Mo - Su)
6:00
Adjust the start time
for Morning.
Morning
6:00
Adjust the cooling
setpoint for Morning.
(35 - 99 )
Morning
6:00
Adjust the heating
setpoint for Morning.
(35 - 99 )
Morning
Page 8
Mo
Press
MODE
Am
Mo
Press
MODE
Am
Am
78
COOL
78
COOL
HEAT
70
Continued
Press
MODE
Press
MODE
Mo
Mo
Programming a Daily Schedule
8:00
Mo
Adjust the start time
for Day.
8:00
Adjust the cooling
Mo
setpoint for Day.
(35 - 99 )
8:00
Adjust the heating
Mo
setpoint for Day.
(35 - 99 )
6:00
Mo
Adjust the start time
for Evening.
6:00
Adjust the cooling
Mo
setpoint for Evening.
(35 - 99 )
Page 9
Day
Day
Day
Am
Am
Am
Pm
Evening
Pm
Evening
85
COOL
85
COOL
HEAT
62
78
COOL
Continued
Press
MODE
Press
MODE
Press
MODE
Press
MODE
Press
MODE
Programming a Daily Schedule
6:00
Adjust the heating
setpoint for Evening.
(35 - 99 )
Adjust the start time
for Night.
Adjust the cooling
setpoint for Night.
(35 - 99 )
Adjust the heating
setpoint for Night.
(35 - 99 )
Mo
I0:00
Mo
I0:00
Mo
I0:00
Mo
Pm
Evening
Pm
Pm
Pm
Night
Night
Night
78
COOL
HEAT
70
82
COOL
82
COOL
HEAT
62
Continued
Press
MODE
Press
MODE
Press
MODE
Press
MODE
Page 10
Programming a Daily Schedule
The copy command becomes available after
programming the entire previous day.
Yes
Select Yes to copy the
previous day’s program
to the day displayed.
No
If Yes is selected:
Tu
If No is selected:
Press
MODE
Selecting Yes, then pressing MODE will
copy the previous day’s program. If yes
is selected again, or each time, this
routine will repeat.
If No is selected, as in previous steps, flashing prompts for
input will appear for the four time periods for the next day.
After programming for all seven days is complete, press
MODE
the MODE and UP buttons at the same time for two seconds
to leave the Setup screens. If no buttons are pressed, the
display will leave the setup screens after 30 seconds.
Page 11
Press
MODE
Advanced Setup
MODE
FAN
Tip: To change hours quickly, press and
hold the FAN button in and press
the UP or DOWN buttons.
On
Off
Press the MODE button.
While holding MODE,
press the FAN button for
for 10 seconds to enter
setup screens.
Adjust the time of day
clock.
Select the day of the
week.
ON = Heat Pump
operation
OFF = Gas Electric
operation
Am
I2:00
Setup
Setup Mo
Setup
Hp
NOTE: Each step # is located at
the top right corner of the
display for easy reference.
I
Press
MODE
2
Press
MODE
3
OFF
Continued
Press
MODE
Page 12
Advanced Setup
Select the reversing valve
b
polarity for Heat Pump
operation:
O = Energize in cooling
b = Energize in heating
O
(Step 4 only appears if
heat pump is on in step 3)
On
Select Electric Heat operation:
On = 1st stage electric heat
Off = 1st stage gas heat
(Step 5 only appears if
Off
heat pump is off in step 3)
Adjust the deadband
for the 1st stage.
(1 - 6 )
Setup
0
Setup
Eh
Setup
2
4
Press
MODE
5
OFF
Press
MODE
6
Press
MODE
Adjust the minimum
difference between
cooling & heating
setpoints.
(0 - 6 )
Select the cycles per
hour limit:
d=cycles per hour
limit defeated
d1=d + defeat 5 min.
compressor lockout
(d1, d, 2 - 6)
2
6
Page 13
Setup
7
COOL
HEAT
Setup
8
Cy
Continued
Press
MODE
Press
MODE
Advanced Setup
Press
FAN
Adjust the programmable
fan timer:
0 - 60 minutes
0:00 = off
Adjust the Programmable
Fan start time. (step 10
appears only if step 9
is not 0:00)
Adjust the Programmable
Fan stop time. (step 11
appears only if step 9
is not 0:00)
On
Select backlight operation:
ON - Light continuously
OFF - Light for 8 seconds
after a button press
Off
Counts the number of
hours Heat has been
running. Press FAN to
reset the Energy Watch
Heat counter.
(0 - 1999 hrs.)
0:00
Fan On
7:00
Fan On
9:00
Fan On
L I
0
Page 14
Setup
Am
Setup
Pm
Setup
Setup
Setup
9
I0
ON
I I
OFF
I2
ON
i3
HEAT
Continued
Press
MODE
Press
MODE
Press
MODE
Press
MODE
Press
MODE
Advanced Setup
Press
FAN
Press
FAN
Counts the number of
hours Cool has been
running. Press FAN to
reset the Energy Watch
Cool counter.
(0 - 1999 hrs.)
Reset the counter to 0 to
remove the Service Filter
icon from the display.
Adjust the number of
hours, in increments of
50, the fan will run
before the Service
Filter icon appears on
the display: 0 = off.
(0 - 1950 hours)
C
Select thermostat
operation in degrees
Fahrenheit or Celsius.
F
After programming is complete,
press the MODE and UP buttons
at the same time for two seconds
to leave the Setup screens. If no
buttons are pressed, the display
will leave the setup screens after
30 seconds.
0
0
0
F
Page 15
Service
Service
Setup
Setup
Filter
Setup
Filter
Setup
i4
COOL
i5
i6
I7
Press
MODE
Press
MODE
Press
MODE
Press
MODE
FAN
Advanced Setup
Advanced Setup Table
Step # Description Range Factory Default
1
Time of Day
2
Day of the Week
Heat Pump
3
Reversing Valve Polarity
4
Electric Heat
5
Deadband/Temp. Swing 1st Stage
6
Minimum Heat/Cool Differential
7
Cycles Per Hour
8
Programmable Fan
9
Programmable Fan Start Time
10
Programmable Fan Stop Time
11
Thermoglow Backlight
12
Energy Watch - Heat Timer
13
Energy Watch - Cool Timer
14
Reset Service Filter Icon
15
Service Filter Run-Time Set
16
Fahrenheit or Celsius
17
24 hour
Mo - Su
Off / On
O / b
Off / On
1 - 6
0 - 6
d, d1, 2 - 6
0:00 - 0:60
24 Hour
24 Hour
Off / On
read only
read only
read only
0 - 1950
F / C
12:00 am
Mo
Off
O
Off
2
2
6
0:00
7am
9pm
On
- -
- -
- 0
F
Page 16
About Advanced Features & Operation
CALIBRATION - Under normal circumstances it will not be necessary to
adjust the calibration of the temperature. If calibration is required,
please contact a trained HVAC technician to correctly perform the
following procedure.
Pm
I2:00
Mo
Day
Service
Am
Pm
Evening
Setup
Night
Filter
o
88
o
AUTO
Outside
ONOFF
Program
88
OFF
COOL
Locked
HEAT
On
Place the therm-
MODE
ostat in the OFF
mode.
Press
MODE button.
While holding the
MODE
MODE button,
press and hold the
DOWN button for
5 seconds. All icons
will appear on the display.
and hold the
I8:88
SuMoTuWeThFrSa
Morning
Fan On
DEADBAND OPERATION - Controls up to two Heat and two Cool stages
(please see the diagram on the next page).
The 1st Stage of heat or cool is turned on when:
(A) The temperature spread from the setpoint is equal to or greater
than: the setpoint plus the 1st stage deadband (step #6, page 13).
This 1st stage deadband is adjustable from 1-6 degrees and the
default is two degrees.
The 2nd Stage of heat or cool is turned on when:
(A) The 1st Stage has been on for a minimum of two minutes.
And
(B) The temperature spread from the setpoint is equal to or greater
than: the setpoint plus the 1st stage deadband (step #6, page 13),
plus the 2nd stage deadband. This 2nd stage deadband is fixed at
two degrees and is not adjustable.
Press the MODE
button once. The
thermostat temperature will be
displayed and
may be calibrated
using the UP or DOWN buttons.
After calibration is
MODE
complete, press
the MODE button
once to save
your changes and
return to normal operation.
I2:00
Mo
o
Pm
o
OFF
Page 17
About Advanced Features & Operation
Heating
Deadband Deadband DeadbandDeadband
(non-adj. 2 ) (non-adj. 2 )
2nd Stage
turn on
The above figure assumes the minimum on time for the prior stage
has been met to allow the next stage to turn on, once the deadbands
have been exceeded.
1st Stage
turn on
DECREASE INCREASE
db 1 db 1db 2 db 2
(adj. 1-6 ) (adj. 1-6 )
Heat
Setpoint
TEMPERATURE
Cool
Setpoint
ELECTRIC HEAT - Selecting Electric Heat (
Cooling
1st Stage
2nd Stage
turn on
turn on
step #5, page 13), will cause the
thermostat to turn on the fan immediately any time there is a heat
demand. Since most gas furnaces control the fan, this feature should be
off unless it is necessary for the thermostat to energize the fan with first
stage heat.
EMERGENCY HEAT - Only available if you have a Heat Pump
installed. To initiate the Emergency Heat feature, press the FAN
button. While holding the FAN button press the UP button. The
Cool setpoint display will read ‘EH’ (emergency heat).
Pm
I2:00
Mo
Press for
Emergency Heat
FAN
73
HEAT
74
Operation - During Emergency Heat operation the thermostat will turn on the
fan and the 2nd stage of heat when there is a demand for heat. Also
during Emergency Heat, the 1st stage of heating or cooling will be
unavailable.
Exit Emergency Heat - Follow the same steps as entering Emergency Heat
by pressing the FAN and UP buttons. During Emergency Heat, only OFF
and HEAT modes are available by pressing the MODE button.
Page 18
About Advanced Features & Operation
FACTORY DEFAULTS -
If, for any reason, you desire to return all the stored
settings back to the factory default settings, follow the instructions below.
WARNING: This will reset all Time Period and Advanced Programming to
the default settings. Any information entered prior to this reset will be
permanently lost.
Pm
Place the therm-
MODE
ostat in the OFF
mode.
Press
MODE button.
While holding the
MODE
MODE button, press
and hold the DOWN
button for 5 seconds. All icons will
appear on the display.
and hold the
I2:00
Mo
I8:88
SuMoTuWeThFrSa
Morning
Day
Service
Fan On
Am
Pm
Evening
Night
Setup
Filter
o
OFF
88
o
COOL
AUTO
Outside
Locked
ONOFF
Program
HEAT
88
On
After all of the icons
appear, release the
MODE and DOWN
FAN
buttons. Then press
and hold the FAN
button for 5 seconds.
After the letters Fd
appear on the display
(Factory Default),
MODE
release the FAN
button. Press the
MODE button twice
to return to normal
operation.
I2:00
Mo
HEAT/COOL DIFFERENTIAL - The Heat and Cool setpoints will not be
allowed to come any closer to each other than the value set in Advanced
Setup step #7, on page 13. This minimum difference is enforced during
Auto changeover and Program On operation.
Note: To increase the spread between the heating and cooling setpoints,
press the MODE button until only the heat setpoint is displayed; adjust to
the desired setpoint. Press the MODE button until only the cool setpoint
is displayed; adjust to the desired setpoint. Press the MODE button again
to enter the Auto-changeover mode where both the heat and cool
setpoints are displayed.
MEMORY BACKUP - In the event of a power loss, the thermostat will retain
the stored program settings without external power or batteries.
PROGRAMMABLE FAN -
This timer will start the fan at the top of each
hour and the fan will run for the number of minutes selected in step #9 on
page 14. Steps 10 & 11 restrict the hours during which the programmable
fan may operate; step #10 is the start time and step #11 is the stop time.
Selecting the same start and stop times will cause the fan to operate 24
hours a day.
Page 19
Pm
o
OFF
About Advanced Features & Operation
KEYPAD LOCKOUT - To prevent unauthorized use of the thermostat, the
front panel buttons may be disabled. To disable, or ‘lock’ the keypad,
press and hold the MODE button. While holding the MODE button, press
the UP and DOWN buttons together. The LOCKED icon will appear on
the display, then release the buttons.
Press all three
buttons in the order
outlined above for
keypad lockout
To unlock the keypad, press and hold the MODE button. While holding
the MODE button, press the UP and DOWN buttons together. The
LOCKED icon will disappear from the display, then release the buttons.
MODE
OUTDOOR SENSORS (Optional Accessory) - One wired or wireless
Outdoor sensor can be installed to read the outdoor temperature. To
view this sensor, press and hold the MODE button for two seconds.
Press any button to exit the outdoor temperature display.
The Outdoor Sensor measures outdoor air temperature and sends this
information to the thermostat; it measures temperature with a range of
-40 to 127 F.
The Outdoor Sensor should be connected to the
thermostat using solid conductor CAT 5, CAT 5e,
or CAT 6 type network communication cable. This
is an unshielded cable with four twisted pairs of
24 gauge solid wire; DO NOT use stranded cable.
The cable length should not exceed 250 feet. If
less than 75 feet of cable is required to connect
the thermostat to the Outdoor Sensor, a three
conductor thermostat cable (18-24 gauge) may
be used; this cable is NOT suitable for any length
greater than 75 feet.
IMPORTANT: Do no use shielded wire. Do not run
run sensor wiring in the same conduit as the
24VAC thermostat wiring. Electrical interference
May cause the sensor to give incorrect temperature readings.
See the Outdoor Sensor instructions for further details.
Page 20
I2:00
Mo
Fan On
Day
Pm
76
o
COOL
Locked
Program
On
HEAT
68
Warranty
One-Year Warranty - This Product is warranted to be free from defects in material and
workmanship. If it appears within one year from the date of original installation, whether or not
actual use begins on that date, that the product does not meet this warranty, a new or
remanufactured part, at the manufacturer’s sole option to replace any defective part, will be
provided without charge for the part itself provided the defective part is returned to the distributor
through a qualified servicing dealer.
THIS WARRANTY DOES NOT INCLUDE LABOR OR OTHER COSTS incurred for diagnosing, repairing,
removing, installing, shipping, ser vicing or handling of either defective parts or replacement
parts. Such costs may be covered by a separate warranty provided by the installer.
THIS WARRANTY APPLIES ONLY TO PRODUCTS IN THEIR ORIGINAL INSTALLATION LOCATION AND
BECOMES VOID UPON REINSTALLATION.
LIMITATIONS OF WARRANTIES – ALL IMPLIED WARRANTIES (INCLUDING IMPLIED WARRANTIES OF
FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY) ARE HEREBY LIMITED IN DURATION TO
THE PERIOD FOR WHICH THE LIMITED WARRANTY IS GIVEN. SOME STATES DO NOT ALLOW LIMITATIONS
ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE MAY NOT APPLY TO YOU. THE
EXPRESSED WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE AND MAY NOT BE ALTERED,
ENLARGED, OR CHANGED BY ANY DISTRIBUTOR, DEALER, OR OTHER PERSON WHATSOEVER. ALL
WORK UNDER THE TERMS OF THIS WARRANTY SHALL BE PERFORMED DURING NORMAL WORKING
HOURS. ALL REPLACEMENT PARTS, WHETHER NEW OR REMANUFACTURED, ASSUME AS THEIR
WARRANTY PERIOD ONLY THE REMAINING TIME PERIOD OF THIS WARRANTY.
1. Normal maintenance as outlined in the installation and servicing instructions or owner’s
manual, including filter cleaning and/or replacement and lubrication.
2. Damage or repairs required as a consequence of faulty installation, misapplication,
abuse, improper servicing, unauthorized alteration or improper operation.
3. Failure to start due to voltage conditions, blown fuses, open circuit breakers or other
damages due to the inadequacy or interruption of electrical service.
4. Damage as a result of floods, winds, fires, lightning, accidents, corrosive environments or
other conditions beyond the control of the Manufacturer.
5. Parts not supplied or designated by the Manufacturer, or damages resulting from their use.
6. Manufacturer products installed outside the continental U.S.A., Alaska, Hawaii, and
Canada.
7. Electricity or fuel costs or increases in electricity or fuel costs for any reason whatsoever
including additional or unusual use of supplemental electric heat.
8. ANY SPECIAL INDIRECT OR CONSEQUENTIAL PROPERTY OR COMMERCIAL DAMAGE OF ANY
NATURE WHATSOEVER. Some states do not allow the exclusion of incidental or
consequential damages, so the above may not apply to you.
This warranty gives you specific legal rights and you may also have other rights which may
vary from state to state.
THE MANUFACTURER WILL NOT BE RESPONSIBLE FOR:
Page 21
Programming Worksheet see Page 8
DAY
M
O
N
D
A
Y
T
U
E
S
D
A
Y
W
E
D
N
E
S
D
A
Y
T
H
U
R
S
D
A
Y
F
R
D
A
Y
S
A
T
U
R
D
A
Y
S
U
N
D
A
Y
I
PERIOD
Morning
Day
Evening
Night
Morning
Day
Evening
Night
Morning
Day
Evening
Night
Morning
Day
Evening
Night
Morning
Day
Evening
Night
Morning
Day
Evening
Night
Morning
Day
Evening
Night
START TIME
COOL
HEAT
Copy Mon Tue
No
Yes
Copy Tue Wed
No
Yes
Copy Wed Thu
No
Yes
Copy Thu Fri
No
Yes
Copy Fri Sat
No
Yes
Copy Sat Sun
No
Yes
Printed on recycled paper.
P/N 88-638 Rev. 1
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