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THERMOSTAT
T1045
Digital
Thermostat up to
2-heat
HEAT
PUMP
Stages: 2-Heat, 1-Cool
Battery or System Powered
Auxiliary Heat Indicator
Back-Lit Digital Display
Fahrenheit or Celsius
Service Filter Indicator
Bi-Color LED (when system powered)
Use with most 1 or 2 Stage Heat Pump Heat and 1 stage Heat Pump Cool units
OWNER’S
MANUAL
Venstar Inc. 05/08
OWNER'S MANUAL
Contents
Safety Warnings
Location of Controls
Display
Normal Operation
Manual Operation
Programmed Operation
Aux Heat
Clock Set
Time Period Programming
Overview
Weekday Programming
Weekend Programming
Advanced Setup
Advanced Features
Factory Defaults
Calibration
Battery Replacement
Warranty
Page 2
T1045
Page #
OWNER'S MANUAL T1045
Safety Warnings
P/N T1045
CAUTION Follow Installation Instructions carefully.
DISCONNECT POWER TO THE HEATER -
AIR CONDITIONER BEFORE REMOVING
THE OLD THERMOSTAT AND INSTALLING
THE NEW THERMOSTAT.
WARNING
CAUTION
The two Alkaline “AA” batteries must be replaced at least once every 12 months to ensure proper operation. The Low Battery icon (fig. 1) will appear on the display when it is time to replace the batteries. If the thermostat is connected to
FIG. 1
24v power, the batteries should still be installed, but are not required.
When is displayed the batteries must be replaced immediately. The manufacturer cannot be liable for improper operation of the thermostat if the batteries are not immediately replaced.
Annual battery replacement is especially critical in locations subject to freezing temperatures. The thermostat will be unable to turn on the heating system if the batteries are exhausted.
Page 3
OWNER'S MANUAL T1045
Location of Controls
DISPLAY
AUX HEAT
SWITCH
Emergency
Normal
Lockout
PROGRAM
SWITCH
RUN program
Program OFF
Set program
MODE SWITCH
Cool, Off or Heat
Su
PM
COOLER &
WA R M E R
BUTTONS
BI-COLOR LED
Heat or Cool demand indicator when system powered: Red = Heat
Green = Cool
FAN SWITCH
On or Auto
NEXT BUTTON
For programming
How to Use: The NEXT button is used to advance from one step to the next in the programming and advanced setup screens (pgs 11-
19).
RESET FILTER
How to Use: Press and hold the RESET FILTER button to clear the
icon from the display (pg 5). To adjust when the icon appears, see Advanced
Setup screens (pg 19).
Page 4
T1045 OWNER'S MANUAL
Display
Day
Night
PM
MTuWThF
SaSu
MorningEvening
88
AM
88
SET
FILTER
AUX
HEAT
COOL
Day of the week. MTuWThF represent the five weekdays and SaSu represent the two weekend days.
Heat and Cool indicators.
In normal operation, Heat or Cool appears, depending
on the Mode Switch position. When heat or cool is
energized, the Heat or Cool indicator will flash. If the
thermostat is system powered the bi-color LED will
also illuminate (red for heating and green for cooling).
Clock Display.
Time period indicators. These indicate the part of the program that is currently active, if the Program
Switch is positioned to RUN.
Desired set temperature.
Current room temperature.
Indicates that 2nd stage of heat is energized.
Indicates when the filter should be serviced. Appears after 0 - 1950 hours of blower operation (adjustable).
Indicates batteries need replacement.
Page 5
OWNER'S MANUAL T1045
Normal Operation
PROGRAM SWITCH
RUN program
Program OFF
SET program
MODE SWITCH
Cool, Off or Heat
Su
PM
COOLER &
WA R M E R
BUTTONS
FAN SWITCH
On or Auto
Manual Operation (Program Switch OFF)
Select Cool or Heat with the Mode Switch.
Normally leave the fan switched to Auto.
In Fan Auto, the fan will turn on only with a heat
or cool demand. When Fan On is selected, the
fan will run continuously.
Adjust the desired set temperature with the
COOLER and WARMER buttons.
Page 6
OWNER'S MANUAL
Normal Operation
PROGRAM SWITCH
RUN program
Program OFF
SET program
T1045
MODE SWITCH
Cool, Off or Heat
Su
PM
SET
HEAT
COOLER &
WA R M E R
BUTTONS
FAN SWITCH
On or Auto
Programmed Operation
Select Cool or Heat with the Mode Switch.
Select RUN with the Program Switch.
Normally leave the fan switched to Auto.
In Fan Auto, the fan will turn on only with a heat or cool demand. When Fan On is selected, the fan will run continuously.
The desired set temperature may be temporarily overridden. The thermostat will revert to the programmed settings in the following time period.
Page 7
OWNER'S MANUAL
Aux Heat
T1045
Su
PM
SET
HEAT
AUX HEAT
SWITCH
Emergency
Normal
Lockout
Emergency - Disables all compressor
functions and energizes only Aux
Heat to satisfy the heat demand.
Normal - Aux Heat is allowed to run, if necessary,
along with the heat pump to satisfy the
heat demand.
Lockout - Aux Heat will never turn on
regardless of the heat demand.
* When the Aux Heat switch is in the Emergency position the compressor will also be locked out during cooling operation.
Page 8
OWNER'S MANUAL
Clock Set
Slide the Program Switch to the SET position.
Setting the time & day are the first two steps after sliding the Program Switch to SET.
PM
Use these buttons to adjust the current time.
Press NEXT to advance
To slew the time more rapidly, push and hold the
COOLER or WARMER buttons.
T1045
Su Use these buttons to adjust the current day.
This thermostat is preprogrammed from the
factory to operate 1 or 2-Stage equipment without
the need for further programming. To optimize the
installation of this thermostat follow the instructions
in the Advanced Setup section.
Page 9
OWNER'S MANUAL T1045
Time Period Programming
Overview
PROGRAM SWITCH
Slide the Program Switch to the SET position.
The blinking icon(s) on the display may be
changed by pressing the COOLER or
WARMER buttons.
After the blinking icon is changed to the desired
selection, press the NEXT button.
Each item in the time period programming screens will flash
and can be modified with the COOLER & WARMER buttons.
Continue the steps above until programming is complete.
Slide the Program Switch to RUN and the thermostat
will run the time period programming.
If the Program Switch is in the OFF position, the thermostat
will not run the time period program. In this case, the
thermostat will be a manual heat or cool only thermostat.
Page 10
OWNER'S MANUAL T1045
Time Period Programming
Weekday Programming
Press NEXT to advance
AM Morning
MTuWThF
Setting the time & day are the first two steps after sliding the Program Switch to SET
(page 9).
Use these buttons to adjust the start time for the morning time period.
Press NEXT to advance
AM Morning
MTuWThF
8
SET
COOL
Press NEXT to advance
6 : : 00
AM Morning
MTuWThF
SET
HEAT
Use these buttons to adjust the cool setpoint for the morning time period.
Use these buttons to adjust the heat setpoint for the morning time period.
Press NEXT to advance
:
AM
MTuWThF
Day
Use these buttons to adjust the start time for the day time period.
Next Page
Page 11
OWNER'S MANUAL T1045
Time Period Programming
Weekday Programming
Press NEXT to advance
:
AM
MTuWThF
Day
SET
COOL
Use these buttons to adjust the cool setpoint for the day time period.
Press NEXT to advance
8
:
: 00
AM
MTuWThF
Day
SET
HEAT
Use these buttons to adjust the heat setpoint for the day time period.
Press NEXT to advance
:
PM
MTuWThF
Evening
Use these buttons to adjust the start time for the evening time period.
Press NEXT to advance
PM
MTuWThF
Evening
SET
COOL
Next Page
Use these buttons to adjust the cool setpoint for the evening time period.
Page 12
OWNER'S MANUAL T1045
Time Period Programming
Weekday Programming
Press NEXT to advance
PM
MTuWThF
Evening
SET
HEAT
Press NEXT to advance
PM
MTuWThF
Night
Press NEXT to advance
:
PM
MTuWThF
Night
SET
COOL
Press NEXT to advance
PM
MTuWThF
Night
Next Page
SET
HEAT
Use these buttons to adjust the heat setpoint for the evening time period.
Use these buttons to adjust the start time for the night time period.
Use these buttons to adjust the cool setpoint for the night time period.
Use these buttons to adjust the heat setpoint for the night time period.
Page 13
OWNER'S MANUAL T1045
Time Period Programming
Weekend Programming
Press NEXT to advance
SaSu
AM Morning
Press NEXT to advance
SaSu
AM Morning
8
SET
COOL
Press NEXT to advance
6 : : 00
AM Morning
SaSu SET
HEAT
Press NEXT to advance
:
AM
SaSu
Day
Use these buttons to adjust the start time for the morning time period.
Use these buttons to adjust the cool setpoint for the morning time period.
Use these buttons to adjust the heat setpoint for the morning time period.
Use these buttons to adjust the start time for the day time period.
Next Page
Page 14
OWNER'S MANUAL T1045
Time Period Programming
Weekend Programming
Press NEXT to advance
:
AM
SaSu
Day
Press NEXT to advance
8 : :
SaSu
SaSu
00
AM
Day
Day
SET
COOL
62
Use these buttons to adjust the cool setpoint for the day time period.
Use these buttons to adjust the heat setpoint for the day time period.
Press NEXT to advance
SaSu
PM
Evening
Use these buttons to adjust the start time for the evening time period.
Press NEXT to advance
6 00
SaSu
SaSu
78
Use these buttons to adjust the cool setpoint for the evening time period.
Next Page
Page 15
OWNER'S MANUAL T1045
Time Period Programming
Weekend Programming
Press NEXT to advance
SaSu
PM
Evening
SET
HEAT
Press NEXT to advance
:
PM
SaSu
Night
Press NEXT to advance
:
PM
SaSu
Night
Press NEXT to advance
:
PM
SaSu
Night
SET
COOL
SET
HEAT
Use these buttons to adjust the heat setpoint for the evening time period.
Use these buttons to adjust the start time for the night time period.
Use these buttons to adjust the cool setpoint for the night time period.
Use these buttons to adjust the heat setpoint for the night time period.
Page 16
OWNER'S MANUAL T1045
Time Period Programming
After you have completed setting the time period programming, you have two options:
1) Run the time period program by sliding the
Program Switch to the RUN position.
Or,
2) Do not run the time period program. The
thermostat will operate as a manual heat
or cool thermostat. Slide the Program
Switch to OFF in this case.
Page 17
OWNER'S MANUAL T1045
Advanced Setup
This is normally done by the installer at initial installation.
Enter advanced setup by sliding the Program Switch to
SET. When the clock is flashing, press the NEXT button for
5 seconds. Do not release the button until this screen appears.
Press NEXT to advance
Press NEXT to advance
Press NEXT to advance
Press NEXT to advance
Use these buttons to adjust the deadband from 1 to 6 degrees.
Use these buttons to adjust the Cycles Per Hour from 2 to 6.
d=no limit (zoning) d1=d+no compressor lockout (page 19).
Select backlight operation when a button is pressed:
OFF: Never turns on.
2,4,6 or 8: Seconds back-
light will be on.
ON: Always on.*
Use these buttons to select thermostat operation in degrees C or F.
Continued
* ON is only available if the thermostat
is system powered.
Page 18
I2:00
Su
PM
I2:00
Su
PM
I2:00
Su
PM
OWNER'S MANUAL
Press NEXT to advance
0
T1045
Actual hours of fan operation
Press RESET
FILTER
FILTER
Press and hold the RESET
FILTER button to reset the filter counter to 0 and
0
SET
FILTER from the display.
Adjust the number of hours the blower will run before the display. 0 = off.
Slide the Program Switch to OFF or RUN to exit
Advanced Setup.
About Advanced
Features & Operation
CYCLES PER HOUR - The Cycles Per Hour setting (page 18)
monitors the number of times per hour your HVAC unit may
energize. For example, at a setting of 6 cycles per hour the
HVAC unit will only be allowed to energize once every 10
minutes. The Cycles Per Hour limit may be temporarily
overridden by pressing the WARMER or COOLER button.
TWO STAGE OPERATION - The 2nd stage of heat (auxiliary
heat) is turned on when the room temperature is equal to or
less than: the setpoint minus the 1st stage deadband (one
degree, adjustable), minus the 2nd stage deadband (two
degrees, non-adjustable).
Heating Cooling
Deadband Deadband Deadband db 2
(non-adj. 2 ) db 1
(adj. 1-6 ) db 1
(adj. 1-6 )
2nd Stage turn on
1st Stage turn on
Heat or Cool
Setpoint
1st Stage turn on
FILTER FILTER
number of hours for fan run time (see above) has been
achieved. This counter keeps track of the number of hours
of fan run time whether the fan is energized in the heating
or cooling modes, or in stand alone operation.
Page 19
OWNER'S MANUAL T1045
CAUTION
Factory Default
If, for any reason, you desire to return all the stored settings back to the factory default settings, follow the instructions below.
Enter advanced setup by sliding the Program Switch to
SET. When the clock is flashing, press the NEXT button for
5 seconds. Do not release the button until this screen appears.
Press NEXT to advance
When the Cycles Per Hour is flashing, press and hold the NEXT button until this screen appears.
MTuWThF
SaSu
Day
Night
MorningEvening
88
AM
PM
88
SET
FILTER
AUX
HEAT
COOL
Press and hold the
NEXT button again until this screen appears.
Day
Night
AM
PM
MorningEvening
MTuWThF
SaSu
88
AUX
HEAT
COOL
88
SET
FILTER
After restoring factory defaults, the thermostat screen will display all icons.
Slide the Program Switch to OFF or RUN to return to normal operation.
WARNING: This will reset all Time Period and Advanced Programming to the default settings. Any information entered prior to this reset may be permanently lost.
OWNER'S MANUAL T1045
CAUTION
Calibration
Under normal circumstances it will not be necessary to adjust the calibration of the temperature sensor. If calibration is required, please contact a trained HVAC technician to correctly perform the following procedure.
Enter advanced setup by sliding the Program Switch to
SET. When the clock is flashing, press the NEXT button for
5 seconds. Do not release the button until this screen appears.
Press NEXT to advance
When the Cycles Per Hour is flashing, press and hold the NEXT button until this screen appears.
Press NEXT two times to advance
MTuWThF
SaSu
Day
Night
MorningEvening
88
AM
PM
88
SET
FILTER
AUX
HEAT
COOL
Press NEXT to store the new value
Press the NEXT button twice to advance to the calibration screen.
Adjust the temperature reading using the WARMER and COOLER buttons, then press the NEXT button to store the new value.
Slide the Program Switch to OFF or RUN to return to normal operation.
Page 21
OWNER'S MANUAL T1045
The batteries are easily accessible from the battery slot located on the front of the thermostat (fig. 1). To open the battery slot, press down on the battery cover (fig. 1) and pull out (fig. 2).
Pull out
:
PM
Su
Press down
Battery slot
(Bottom View)
FIG. 1 FIG. 2
Remove the old batteries and replace with the new
AA alkaline batteries (fig. 3).
New batteries in
Old batteries out
Place the bottom hook of the battery cover into the slot and snap closed (fig. 4). Snap closed
The batteries must be replaced immediately when the thermostat displays the low battery icon (fig.
1). If the thermostat is connected to 24v power, the batteries should
(Bottom View) still be installed. Installing the batteries when system powered (24VAC) will keep the clock running in the event of line power interruption.
Page 22
Bottom
Hook
FIG. 4
FIG. 1
OWNER'S MANUAL
Warranty
T1045
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, servicing 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.
THE MANUFACTURER WILL NOT BE RESPONSIBLE FOR:
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.
Page 23
Programming Worksheet see page 10
DAY PERIOD START TIME COOL HEAT
Morning
Monday
Tuesday
Wednesday
Thursday
Friday
Day
Evening
Night
Saturday
Sunday
Morning
Day
Evening
Night
Printed on recycled paper.
P/N 88-636 Rev. 3
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Frequently Answers and Questions
What type of batteries does the Venstar T1045 thermostat use?
How often should I replace the batteries in the Venstar T1045 thermostat?
What is the purpose of the AUX HEAT switch on the Venstar T1045 thermostat?
How do I set the time and day on the Venstar T1045 thermostat?
How do I program the time period settings on the Venstar T1045 thermostat?
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