Venstar T1045 User manual
Venstar Inc. 05/08
Digital
Thermostat
Digital
Thermostat
residential
T1045
THERMOSTAT
OWNER’S
MANUAL
OWNER’S
MANUAL
Stages: 2-Heat, 1-Cool
Battery or System Powered
Auxiliary Heat Indicator
Back-Lit Digital Display
Fahrenheit or Celsius
PROGRAMMABLE
5+2 DAY
PROGRAMMABLE
5+2 DAY
up to
up to
& 1-cool
& 1-cool
2-heat
2-heat
Service Filter Indicator
HEAT
PUMP
HEAT
PUMP
Use with most 1 or 2 Stage Heat Pump Heat and 1 stage Heat Pump Cool units
Bi-Color LED (when system powered)
Page 2
Contents Page #
Time Period Programming
Advanced Setup
Battery Replacement
Overview
Weekday Programming
Weekend Programming
Normal Operation
Manual Operation
Warranty
Safety Warnings
Location of Controls
Display
Programmed Operation
Clock Set
Advanced Features
Factory Defaults
Calibration
Aux Heat
OWNER'S MANUAL
T1045
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
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.
CAUTION Follow Installation Instructions carefully.
DISCONNECT POWER TO THE HEATER -
AIR CONDITIONER BEFORE REMOVING
THE OLD THERMOSTAT AND INSTALLING
THE NEW THERMOSTAT.
WARNING
Page 3
Safety Warnings
CAUTION
FIG. 1
OWNER'S MANUAL
T1045
P/N T1045
Su
PM
I2:00
:
Location of Controls
Page 4
NEXT BUTTON
For programming
How to Use: The NEXT
button is used to ad-
vance from one step to
the next in the progra-
mming 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).
FILTER
FILTER
OWNER'S MANUAL
T1045
On or Auto
FAN SWITCH
COOLER &
WA R M E R
BUTTONS
DISPLAY MODE SWITCH
Cool, Off or Heat
RUN program
Program OFF
Set program
PROGRAM
SWITCH
Emergency
Normal
Lockout
AUX HEAT
SWITCH
BI-COLOR LED
Heat or Cool demand
indicator when system
powered: Red = Heat
Green = Cool
Page 5
Display
88
88
SET
MTuWThF
SaSu
AM
PM MorningEvening
Day
Night AUX
HEAT
COOL
I2:00
:
FILTER
Clock Display.
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.
Day of the week. MTuWThF represent the five week-
days and SaSu represent the two weekend days.
Time period indicators. These indicate the part of
the program that is currently active, if the Program
Switch is positioned to RUN.
OWNER'S MANUAL
T1045
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).
Su
PM
I2:00
:
Page 6
Normal Operation
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.
OWNER'S MANUAL
T1045
PROGRAM SWITCH
RUN program
Program OFF
SET program
On or Auto
FAN SWITCH
COOLER &
WA R M E R
BUTTONS
MODE SWITCH
Cool, Off or Heat
Su
PM
I2:00
:
SET
HEAT
Normal Operation
Page 7
Programmed Operation
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.
The desired set temperature may be temporarily
overridden. The thermostat will revert to the
programmed settings in the following time period.
Select RUN with the Program Switch.
OWNER'S MANUAL
T1045
On or Auto
FAN SWITCH
COOLER &
WA R M E R
BUTTONS
MODE SWITCH
Cool, Off or Heat
PROGRAM SWITCH
RUN program
Program OFF
SET program
Su
PM
I2:00
:
SET
HEAT
Page 8
Aux Heat
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.
*
OWNER'S MANUAL
T1045
Emergency
Normal
Lockout
AUX HEAT
SWITCH
Page 9
Clock Set
Use these buttons to
adjust the current time.
Use these buttons to
adjust the current day.
PM
6:00
:
Su
Setting the time & day are the first two steps after
sliding the Program Switch to SET.
To slew the time more rapidly, push and hold the
COOLER or WARMER buttons.
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.
OWNER'S MANUAL
T1045
Press NEXT
to advance
Slide the Program Switch to
the SET position.
Time Period Programming
PROGRAM SWITCH
Page 10
Overview
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.
OWNER'S MANUAL
T1045
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