Tantalus ST-1480 Specification sheet

AW000245
-
DRAFT
Tantalus ST-1480 Smart Thermostat
Operating and
Installation Manual
© All Rights Reserved

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Operating and
Installation Manual
Congratulations on the purchase of your new thermostat. It has been designed for easy
programming to save you on energy costs and allow a comfortable living environment.
Features:
•Auto Mode programming of your yearly Heating and Cooling needs
•Easy adjustment of temperature and schedule
•EnergyStar® compliant presets to help reduce heating and cooling costs
•Wirelessly communicates with your utility
•Notifies you and automatically responds to utility demand response programs
•Single button Conserve Mode operation
•Large, easy to read backlit display
•Silent operation
•Protection against installation short circuits

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Table of Contents
OPERATING THE THERMOSTAT...........................................................................7
WORKING MODES..............................................................................................................7
NORMAL OPERATING MODE............................................................................................8
NAVIGATING THE CONTROLS ..........................................................................................8
HOME SCREEN...................................................................................................................9
TITLE BAR.........................................................................................................................10
HELP BUTTON..................................................................................................................10
SETTING THE TIME..........................................................................................................11
DEFAULT SCHEDULE......................................................................................................12
TEMPORARY HOLD..........................................................................................................13
HEATING AND COOLING MODES ...................................................................................14
FAN MODES ......................................................................................................................15
TEMPERATURE SETTINGS .............................................................................................16
SCHEDULE........................................................................................................................18
PERMANENT, TIMED, AND VACATION HOLDS..............................................................19
TEMPERATURE UNITS AND CALIBRATION ...................................................................21
SERVICE INFORMATION.................................................................................................22
USEROPTIONS ................................................................................................................23
LANGUAGES .................................................................................................................23

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SCHEDULE....................................................................................................................23
CHANGE FILTER REMINDER.......................................................................................24
POWER OUTAGES ...........................................................................................................24
THERMOSTAT CONSERVATION MODE.........................................................................25
USER CONSERVE MODE.............................................................................................26
UTILITY CONSERVE MODE.........................................................................................28
INSTALLATION AND MAINTENANCE..................................................................30
MOUNTING THE THERMOSTAT......................................................................................30
MOUNTING THE REMOTE SENSORS .............................................................................30
CLEANING THE THERMOSTAT.......................................................................................30
REMOVING THERMOSTAT FRONT HOUSING FROM BACKPLATE..............................31
REPLACING THE BATTERY..........................................................................................31
WIRING CONFIGURATION...............................................................................................32
SETUP MENU OPTIONS...................................................................................................34
PASSWORD...................................................................................................................34
SETPOINT RANGE........................................................................................................35
EQUIPMENT TYPE........................................................................................................35
EQUIPMENT SETTINGS...................................................................................................36
CONVENTIONAL SYSTEMS .........................................................................................36
HEAT PUMP SYSTEMS.................................................................................................37
CONTROL OPTIONS.........................................................................................................38

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RESET...............................................................................................................................39
CONVENTIONAL SYSTEM TEST .....................................................................................40
HEAT-PUMP SYSTEM TEST............................................................................................41
PRODUCT CONFORMITY.................................................................................................42
NOTES...............................................................................................................................43

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OPERATING THE THERMOSTAT
Working Modes
The thermostat has two working modes:
•Normal Operating Mode: In this mode you can program the SETPOINT temperatures,
the schedules and remaining parameters of the thermostat configuration.
•Conservation Mode: When set in this mode by either you or through a remote request
from your utility,the scheduled SETPOINT values are modified to saveenergy;you
cannot modify any settings that may affect the objective temperatures or the HVAC
equipment operation.

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NORMAL OPERATING MODE
Navigating the Controls
The function of the LEFT and RIGHT TAB buttons appears on the bottom of the display screen.
Use the SCROLL(? ?) buttons to move through the menu items and options, and to change
highlighted values. Press the SELECT(v) button to select or accept highlighted menu items. You
can always go back or cancel prior to saving changes.

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Home Screen
The Home Screen displays current temperature and operation data. To view this screen when the
backlight is off just press any of the buttons. Icons such as the heat or fan are animated when the
equipment is running.

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Title Bar
The current time isdisplayed in the upper right corner of the Title Bar while in the upper left corner
there is an icon showing the communications link status between the thermostat and the utility
meter:
means Link OFF, means Link ON,
The Title Bar also displays messages sent through the communications link to you byyour utility
(e.g., the Electricity Rate).
HELP button
The HELP button providesyouwith information on how to navigate through the individual menu
screens. Itwill help you quickly change settings without referring to this user manual; however, it
does not replace it so please keep this manual forfuture reference.
??

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Setting the Time
The current date and time need to be set at initial installation and after battery replacement. You
can change the day, time, enable a 24h clock readout, and change from daylight saving to standard
time by selecting TIME from the Main Menu. You can always change between 12H or 24H clock
format.
Press the Left Tab button on the home screen to view the Main
Menu
Use the SCROLL buttons to select the TIME menu.
Press SELECT to enter the TIME menu.
Use the SCROLL buttons to select between the ADJUST
DATE/TIME and the CLOCK FORMAT menus.
To change between 12 and 24 hour clock formats, press SELECT
on the CLOCK FORMAT menu item. The setting will be
underlined. You can change it using the SCROLL buttons and
then pressing SELECT.
To adjust the date and time, press SELECT on the ADJUST
DAY/TIME menu item.
The underlined selection will be changed using the SCROLL
buttons.
Press SELECT to move between hour and minute adjustment.
Press SAVE CHANGES to accept the new settings and return to
the TIME menu.

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Default Schedule
The thermostat’s Schedule is factory programmed in accordance with EnergyStar guidelineswhich
define the START TIMES and SETPOINTS listed below (Note that a SETPOINT is defined by a
NAME, and HEAT & COOL temperatures). Thethermostat anticipates the time required to reach a
desired temperature prior to the start of the SETPOINT time; therefore, you only need to set the
desired time for the SETPOINT temperature.
SCHEDULE
Mon.toFri. Sat. & Sun.
SETPOINT SETPOINT
START
TIMES
NAME HEAT COOL
START
TIMES
NAME HEAT COOL
6:00 am
Wake 70°F (21°C)
78°F (26°C)
8:00 am
Leave 62°F (17°C)
85°F (29°C)
8:00 am
Wake 70°F (21°C)
78°F (26°C)
6:00 pm
Return 70°F (21°C)
78°F (26°C)
10:00 pm
Sleep 62°F (17°C)
82°F (28°C)
11:00 pm
Sleep 62°F (17°C)
82°F (28°C)

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Temporary HOLD
You temporarily adjustthe temperature warmer or cooler, without affecting the pre-set
programming, through the use of a temporary hold.The thermostat will remain at the temporary
HOLD temperature until the next scheduled SETPOINT.
From the home screen, press either of the SCROLL buttons to
view this screen. Continue to press either of the SCROLL buttons
to highlight the operating target SETPOINT (HEAT or COOL),
which will be underlined.
Press the SELECT button to toggle between the HEAT and COOL
temperatures.
Set the desired temperature using the SCROLL buttons.
Press the LEFT TAB to ENGAGE HOLD, or RIGHT TAB to
CANCEL and return to the normal Home Screen.
When TEMPORARY HOLD is engaged the screen will be as shown below:
To cancel a HOLD, press a SCROLL button to return to this
screen.
Press the RIGHT TAB to CANCEL HOLD, or LEFT TAB to
ENGAGE HOLD (continue the HOLD) and return to the normal
Home Screen.

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Heating and Cooling Modes
Thethermostat is pre-set for heating operation (HEAT). You can manually change the operating
mode between AUTO, HEAT, COOL, OFF, and, for heat pump applications with auxiliary heat,
EMERG.
Press the RIGHT TAB button on the home screen to view this
screen.
Use the SCROLL buttons to select the desired operating mode.
Press SELECT to engage the operating mode.
AUTO:The thermostat automatically selects heating or cooling depending on the indoor
temperature.
HEAT:The thermostat controls only the heating system.
COOL:The thermostat controls only the cooling system.
OFF:Heating and cooling systems are off.
EMERG:Note:only for heat pumps with auxiliaryheat. The thermostat only controls the
Emergency (Auxiliary) heatwhichleaves the heat pump’s compressor locked out.
Use this setting only when you suspect the heat pump is out of service or the
outdoor conditions render inefficient the operation of the heat pump.

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Fan Modes
You can manually change the fan mode between AUTO and ON.
Press the Right Tab button on the home screen to view this
screen
SCROLL through the operating modes to get to the fan
modes, then press SELECT to engage the desired fan mode.
AUTO: The fan runs only when the heating, cooling, or emergency systems are on. For
conventional systems with the option FAN ON IN HEAT set to NO, the fan is not controlled by the
thermostat but by the furnace.
ON: The fan runs continuously.

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Temperature Settings
A SETPOINT is defined by a NAME, and HEAT & COOL temperatures.
Example: If the SETPOINT is set to WAKE, a thermostat operating in AUTO mode will keep your
dwelling’s temperature at the predefined HEAT or COOL temperature. In the summer, the
thermostat will COOL your dwelling down to 78°F. In the fall, the thermostat will engage the HEAT
mode, heating your dwelling up to 70°F throughout the winter. In the spring, when temperatures rise
again, the thermostat will change back to COOL mode.
The SETPOINT’s HEAT and COOL temperaturescan be changedusing the SETPOINTS screen.
Choose SETPOINTS from the Main Menu to view this screen.
To change the HEAT and COOL temperature settings, SCROLL
to the SETPOINT you want to change and press SELECT.
SCROLL to change the temperature, or pressSELECT to move
between the HEAT and COOL settings.
Press the LEFT TAB to SAVE temperature changes.

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Temperature Settings (continued)
To change the name of a SETPOINT, press EDIT NAME and
change the SETPOINT’s name by using the SCROLL and
SELECT buttons. Use SELECT to move the cursor to the next
position and SCROLL to find the desired letter or blank (empty)
character.

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Schedule
The SCHEDULE determines when a SETPOINT such as WAKE begins. Only the start times are
defined. The SETPOINT endswhen the next SETPOINT starts. To delete a start time, SCROLL
down the list ofstart times, and SELECT it; press SELECT again to underline the associated
SETPOINT name and SCROLL until NOT USED is underlined, i.e. the SETPOINTwill be NOT
USED in this case.
The PROGRAM window displays the SETPOINTassociated
with the start time on the right.
Adjust the start time by pressing SELECT and SCROLLING
the time.
Press SELECT to movewithin the PROGRAM window. Here
the SETPOINT can be SCROLLED to choose the name of a
different SETPOINT.
Press SELECT to return to the start times on the right.
You can have up to 6 scheduled start times.
To add a start time, SCROLL to a blank row, SELECT it, and
change thestart time.
Change the name NOT USED to an appropriate SETPOINT
after you have added the start time.
Choose SCHEDULE from the main MENU to view this
screen.

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Permanent, Timed, and Vacation HOLDs
The SCHEDULE can be modified to maintain a desired SETPOINT through either a:
•Permanent HOLD (HOLD until cancelled)
•Timed HOLD(HOLDfor 1 to 99 hours, or 1 to 99 days)
•Vacation HOLD (HOLD until a set date)
Choose HOLD from the main Menu then select the HOLD TYPE, press SELECT, then SCROLL to
the desired HOLD TYPE and press SELECTagain.
Permanent HOLD
Using the arrow keys,change the HOLDTYPE to
PERMANENT and press the SELECT key. SCROLL to the
line above HOLDTYPE and press the SELECT key again,
scroll to choose the desired SETPOINT NAME.
Press SAVE CHANGES to accept the new settings and
initiate the HOLD.To cancel the HOLD, return to the HOLD
menu and press CANCEL HOLD.

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Permanent, Timed, and Vacation HOLDs (continued)
Timed HOLD
In TIMED HOLD, choose between 1 and 99(in hours or
days). You can alsochoose the SETPOINT to HOLD.
Press SAVE CHANGES to accept the new settings and
initiate the HOLD.
To cancel the HOLD, return to the HOLD menu and press
CANCEL HOLD.
Vacation HOLD
Choosethe HOLD UNTIL date in VACATIONHOLD. You
can alsochoosethe SETPOINT to HOLD.
Press SAVECHANGES to accept the new settings and
initiate the HOLD.
To cancel the HOLD, return to the HOLD menu and press
CANCEL HOLD.