TXU Energy iThermostat User manual
TXU Energy
iThermostat™
Installation Manual
Copyright May 2008
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.
iThermostat is a trademark of TXU Energy Retail Company, LLC.
iThermostat is manufactured in partnership with Comverge and White-Rodgers.
Portions © 2008 TXU Energy Retail Company LLC. All rights reserved. REP Certificate Number
10004.
iThermostat™Installation Manual 1
Contents
Contents.................................................................................................................. 1
Introduction............................................................................................................. 2
Getting Started........................................................................................................ 4
Quick Guide............................................................................................................. 6
Step 1: Remove Old Thermostat............................................................................. 8
Step 2: Wire and Mount iThermostat™................................................................ 10
Step 3: Configure iThermostat.............................................................................. 15
Step 4: Check iThermostat Operation .................................................................. 17
Step 5: Activate iThermostat................................................................................ 20
Wiring Chart.......................................................................................................... 22
Configuration Menu Options................................................................................. 25
2 iThermostat™Installation Manual
Introduction
About this Manual
This manual describes how to install the TXU Energy iThermostat™ in your home. If you need assistance
with the installation, you should contact iThermostat customer service at 1-866-733-1807.
The iThermostat™Can Replace Most Thermostats
The iThermostat will work with the following heating and cooling systems:
•Heat Pump (No Aux. or Emergency Heat)
•Heat Pump (with Aux. or Emergency Heat)
•Standard Heat & Cooling Systems
•Two Stage Heat & Two Stage Cool
•Standard Heat Only Systems
•Millivolt Heat Only Systems – Floor or Wall
Furnaces
•Standard Central Air Conditioning
•Gas or Oil Heat
•Electric Furnace
•Hydronic (Hot Water) Zone Heat – 2 Wires
(But not Hydronic zone heat with 3 wires)
iThermostat™Installation Manual 3
Cautions
Failure to read and follow all instructions carefully before installing or operating could cause personal injury and/or
property damage. If there are any questions regarding the installation procedures, please contact iThermostat
customer service at 1-866-733-1807 before attempting any step in the installation process.
To prevent electrical shock and/or equipment damage, disconnect electric power to system at main fuse or circuit
breaker box until installation is complete.
Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or
fire hazard.
This product does not contain mercury. However, this product may replace a unit which contains mercury. Do
not open mercury cells. If a cell becomes damaged, do not touch any spilled mercury. Wearing non-absorbent
gloves, clean up the spilled mercury and place into a container which can be sealed. If a cell becomes damaged,
the unit should be discarded.
Mercury must not be discarded in household trash. Please place in a suitable container and return to White-
Rodgers at 2895 Harrison Street, Batesville, AR 72501 for proper disposal.
4 iThermostat™Installation Manual
Getting Started
Pre-Installation Checklist
Before you install your iThermostat:
Read these instructions thoroughly. In particular, make note of the Cautions and Installation Tips
contained in this manual.
Check your iThermostat kit to make sure you have all of the required parts (see below).
Assemble the required tools (see below).
Required Parts
iThermostat
Wall anchors
Mounting screws
Wire labels
iThermostat™Installation Manual 5
Required Tools
Flat blade screwdrivers – 1 large and 1 small
Wire cutter (optional)
Level (optional)
Power drill with 3/16 inch drill bit
Installation Tips
•Read and save these instructions for future use.
•Before attempting any step in the installation process that you are unsure about how to perform and to
prevent personal injury and/or property damage, contact iThermostat customer service at 1-866-733-
1807.
6 iThermostat™Installation Manual
Quick Guide
1) Remove Old Thermostat
oTurn off power to the air handler at the power switch located by the unit or at the breaker panel.
Also turn off the power to the condenser unit at the breaker panel.
Caution: To prevent electrical shock and/or equipment damage, disconnect electric power to system
at main fuse or circuit breaker box until installation is complete.
oRemove cover from old thermostat to expose wires.
oIdentify each wire to corresponding terminal and disconnect.
oRemove old thermostat from wall, making sure that thermostat wires do not fall back into wall
opening.
2) Wire and Mount iThermostat
oFeed thermostat wires through iThermostat hole.
oWire iThermostat.
oSet iThermostat switches.
oEngage batteries.
oTurn on power at breaker.
iThermostat™Installation Manual 7
3) Configure iThermostat
4) Check iThermostat Operation
5) Activate iThermostat
oLog into TXU Energy web site at www.txu.com/iThermostat to activate and set initial program.
8 iThermostat™Installation Manual
Step 1: Remove Old Thermostat
Caution
To prevent electrical shock and/or equipment damage, disconnect electric power to system at main fuse or circuit
breaker box until installation is complete. It is critical to turn the power off to the air handler unit (located inside
or in attic) and it is highly recommended that you turn the power off to the condenser unit (located outside) as
well.
You must turn off the power to the thermostat before installing your new iThermostat. Turning off power to the air
handler is the easiest way to turn off power to the thermostat. If your house was built before 1985, you will likely
need to turn off power to the air handler at the breaker panel. If your home was built after 1985, a light switch
located near the air handler can be used to turn power off. The air handler unit is typically located in the attic.
To insure that you have successfully disconnected the thermostat power, switch the FAN to the ON position and
verify that the fan is not operating. Many thermostats will have battery back up so the display will still be ON
even if the power has been switched OFF.
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