TXU Energy iThermostat 1F88-300 User manual

TXU Energy iThermostat
In-Home User Manual
Model: 1F88-300
7-Day Programming

Copyright November 2009
Data, drawings, and other material contained herein are proprietary to TXU Energy Retail
Company LLC and may not be reproduced or duplicated in any form without the prior
permission of TXU Energy.
TXU Energy iThermostat is a trademark of TXU Energy Retail Company LLC.
TXU Energy iThermostat is manufactured in partnership with Comverge and White-
Rodgers.
Portions © 2009 TXU Energy Retail Company LLC. All rights reserved.
REP Certificate Number 10004.
Version v3.0 rev1 (November 9, 2009)

TXU Energy iThermostat In-Home User Manual
Table of Contents
1
Table of Contents
Getting Started with Your iThermostat™...................................................................................3
Overview............................................................................................................................. 3
iThermostat™ Buttons .......................................................................................................... 4
iThermostat™ Display........................................................................................................... 5
Normal Thermostat Display ................................................................................................... 6
Selecting Heating or Cooling ................................................................................................. 6
Setting the Current Day and Time.......................................................................................... 8
10
Resetting the FLTR Display ................................................................................................. 1
Programming Your iThermostat™............................................................................................11
Programming Tips .............................................................................................................. 12
Planning Your Program ....................................................................................................... 13
Programming Heating and Cooling....................................................................................... 14
Setting Holds ..................................................................................................................... 16
Configuration Menu Options ....................................................................................................19
Configuration Menu Options ................................................................................................ 20
Troubleshooting Assistance Guide...........................................................................................24
iThermostat Display............................................................................................................ 24
Programming..................................................................................................................... 25
Holds ................................................................................................................................ 27
Equipment......................................................................................................................... 28

TXU Energy iThermostat In-Home User Manual
2

TXU Energy iThermostat In-Home User Manual
Getting Started with Your iThermostat™
3
Getting Started with Your iThermostat™
Overview
Your iThermostat™ has a door that opens so you can access the buttons to operate and
program the iThermostat.
Open the iThermostat door:
•Gently pull the door down so the buttons are visible, as shown here.
Close the iThermostat door:
•Push the door up until it snaps into place.
iTherm
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st
a
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doo
r

TXU Energy iThermostat In-Home User Manual
Getting Started with Your iThermostat™
4
iThermostat™ Buttons
Programming Functions
The functions that appear below the buttons (TIER, SELECT, MODE)
become active when you press PGRM to enter programming mode.
Otherwise, these buttons perform their alternate functions, which appear
above the buttons.
HOLD
Holds system at
current temperature
setting until you
release by pressing
RUN.
INFO
Displays the
information screen
(if available) or
moves to next info
screen.
PRGM
Enters
thermostat
programming
mode.
SYSTEM
Selects the system
mode: cooling,
heating, auto-
changeover,
emergency heat
(heat pumps only),
or Off.
RUN
•Cancels holds and
returns system to
programmed
settings.
•Exits programming
and saves all
settings.
TIER
(Programming
mode) Selects a
price tier (Low,
Medium, High,
or Critical).
SELECT
(Programming
mode) Toggles
between
temperature
setpoint and
period start time.
MODE
(Programming
mode) Toggles
between
heating and
cooling
programs.
FAN
Controls your
system’s indoor
fan. For energy
efficiency, this
is normally set
to AUTO, but
can be set to
ON.

TXU Energy iThermostat In-Home User Manual
Getting Started with Your iThermostat™
5
iThermostat™ Display
Note: Filter indicator (FLTR) not shown. See page 11.
Day of the Week
Indicates the current day of
the week.
Message Area
Indicates the current period of the day.
Also displays other messages such as
consumption, bill, rate, etc. if enabled
and AUX if the strip heat of a heat
pump system is turned on.
Time / Temperature
Setpoint
Displays the current
time. Press up arrow,
down arrow, or RUN
once to display the
current temperature
setpoint. Displays OFF
when the HVAC system
is turned off.
System Indicator
•COOL – Air conditioning is active
•HEAT – Heat is active
•HEAT/COOL – Auto-changeover is
active (also displayed when system
is Off)
•EMER – Emergency heat (heat
pump only) is active
•STG 1 – First stage of heat or cool
is running
•STG 1+2 – First and second stage
of heat or cool (if used) are
running
Antenna Icon
Indicates that a system update or a
web programming update to your
thermostat’s heating or cooling
program, hold mode, or system
mode is occurring.
Press any key to remove the display
of the antenna icon.
Room Temperature
Displays the current
room temperature.
HOLD
•Flashing - Indicates a
temporary system
temperature hold.
•Solid (not flashing):
Indicates a
permanent system
temperature hold.

TXU Energy iThermostat In-Home User Manual
Getting Started with Your iThermostat™
6
Normal Thermostat Display
The “normal” thermostat display is what displays on your thermostat during normal
operation. The following display elements appear in normal display:
•Time period – Top left. DAY in this example.
•Day of the week – Top. MO (for Monday) in this example.
•Current time – Left center. 7:00 AM in this example.
•System mode – Center. COOL in this example.
•Current room temperature – Right. 75 in this example.
Displaying the Current Temperature Setpoint
To display the current temperature setpoint, press or once. The setpoint
appears in the left center area where the time is normally displayed.
Note: Pressing the up or down arrow key more than once will change the temperature
setpoint temporarily (see “Setting Temporary Holds” on page 18).
Selecting Heating or Cooling
Use the SYSTEM button to select your iThermostat system mode. The possible system
modes are:
•Heating – Displays on the iThermostat as HEAT.
•Cooling – Displays on the iThermostat as COOL.
•Auto-changeover (see below) – Both HEAT and COOL icons are on.
•Emergency heat – Displays EMER (flashing) and HEAT.
•Off – Displays on the iThermostat as OFF.
When heating or cooling is called (compressor turned On), STG 1 or STG 1+2 will display
(depending on how many stages of heating/cooling your system is configured for).

TXU Energy iThermostat In-Home User Manual
Getting Started with Your iThermostat™
7
Auto-Changeover Mode
In auto-changeover mode, iThermostat automatically switches between your heating and
cooling programs to maintain your home’s temperature within your programmed
setpoints. The iThermostat will call for heat or cool as needed, but never both at the
same time. Auto-changeover is convenient during the fall and spring when days may be
cool in the early morning hours and hot in the afternoons.
Important: In auto-changeover mode, the programmed heat setpoint must be at least
2 degrees lower than the cool setpoint.
Selecting Heating or Cooling
Follow this procedure to select the system mode.
QUICK GUIDE PROCEDURE DISPLAY
Press one or more
times to select
the desired mode.
Press the SYSTEM button one or more times to
select the desired mode.
•When heating is selected, HEAT is displayed.
•When cooling is selected, COOL is displayed.
•When auto-changeover mode is selected, both
HEAT and COOL are displayed.
•When emergency heat is selected (heat pump
systems only), EMER HEAT is displayed (EMER
flashes).
•When the system is Off, OFF displays to the
left.
When heating or cooling is called (compressor
turned On), STG 1 or STG 1+2 will display
(depending on how many speeds your
heating/cooling system is capable of using).
Cooling On:
System Off:

TXU Energy iThermostat In-Home User Manual
Getting Started with Your iThermostat™
8
Setting the Current Day and Time
After establishing communication with the Gateway, the current day and time on your
iThermostat will be automatically updated within 24 hours. In case the system does not
update with the current the day and time, you may need to set it yourself manually.
QUICK GUIDE STEP DESCRIPTION DISPLAY
Press once. 1 Press PRGM. The current time displays.
Press once.
Press to select
the hour.
2
Press SELECT. The hour flashes.
Press and hold the up arrow or down arrow
button until you reach the correct hour and
AM/PM designation.
Press once.
Press to select
the minute.
3
Press SELECT. The minute flashes.
Press and hold the up arrow or down arrow
button until you reach the correct minute.
Press once.
Press to select
the desired time
zone setting.
4
Press SELECT. The Time Zone (TZ) option
displays.
Press the up arrow or down arrow button to
select the correct Time Zone:
-5 = Eastern
-6 = Central
-7 = Mountain
-8 = Pacific