Venstar T1045 User Manual
residential
THERMOSTAT
Digital
Digital
Thermostat
Thermostat
5+2 DAY
5+2 DAY
PROGRAMMABLE
PROGRAMMABLE
up to
up to
2-heat
2-heat
& 1-cool
& 1-cool
HEAT
HEAT
PUMP
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)
T1045
Use with most 1 or 2 Stage Heat Pump Heat and 1 stage Heat Pump Cool units
OWNER’S
OWNER’S
MANUAL
MANUAL
Venstar Inc. 05/08
OWNER'S MANUAL
T1045
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
Page #
Factory Defaults
Calibration
Battery Replacement
Warranty
Page 2
OWNER'S MANUAL
Safety Warnings
T1045
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
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.
FIG. 1
Page 3
OWNER'S MANUAL
Location of Controls
T1045
AUX HEAT
SWITCH
Emergency
Normal
Lockout
DISPLAY
:
PM
I2:00
Su
FAN SWITCH
On or Auto
PROGRAM
SWITCH
RUN program
Program OFF
Set program
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).
MODE SWITCH
Cool, Off or Heat
COOLER &
WA R M E R
BUTTONS
BI-COLOR LED
Heat or Cool demand
indicator when system
powered: Red = Heat
Green = Cool
RESET FILTER
How to Use: Press and
hold the RESET FILTER
butto n to clear the
FILTER
icon from the
display (pg 5). To adjust
when the icon
appears, see Advanced
Setup screens (pg 19).
FILTER
Page 4
OWNER'S MANUAL
Display
AM
Morning
:
PM
I2:00
MTuWThF
SaSu
Day
Night
88
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.
Evening
88
SET
FILTER
AUX
HEAT
COOL
T1045
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
Normal Operation
T1045
PROGRAM SWITCH
RUN program
MODE SWITCH
Cool, Off or Heat
Program OFF
SET program
:
PM
I2:00
Su
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
T1045
PROGRAM SWITCH
RUN program
MODE SWITCH
Cool, Off or Heat
Program OFF
SET program
:
PM
I2:00
Su
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
T1045
Aux Heat
:
PM
I2:00
Su
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.
SET
HEAT
AUX HEAT
SWITCH
Emergency
Normal
Lockout
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
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