Emerson Delwarva Power Web-Programmable Thermostat User manual

DDWTMS1317B
Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
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Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
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☐Program Details _________ _________
GRAPHIC
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Program Specic Checklist Name: Date:
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Installed by: _____________________________
Date: ___________________________________
Number of Thermostats:____________________
Notes: __________________________________
________________________________________
________________________________________
________________________________________
________________________________________
Homeowner’s Manual
Our web-programmable thermostat can help you save up to 10% off
your heating and cooling costs, according to the U.S. Department of Energy.
Look inside for a complete guide to the set up and operation of your new thermostat.
Web-Programmable Thermostat
Lowering the demand for electricity helps to conserve resources that otherwise would have been used to generate energy.
1-866-353-5799 • delmarva.com/rewards
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2 Delmarva Power Web-Programmable Thermostat Homeowner’s Manual
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
Colors: ccccc
Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
☐Phone Number _________ _________
☐URL _________ _________
☐Program Details _________ _________
GRAPHIC
DESIGNER
☐SPELL CHECK
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DDWTMS1317B
Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
Table of Contents
Step 1: Getting Started...................................................................................................................................................3
A. Thermostat Buttons and Indicators.................................................................................................................3
B. Thermostat Display.........................................................................................................................................4
Step 2: Main Menu and Thermostat Settings ..................................................................................................................6
A. Main Menu ....................................................................................................................................................6
B. Thermostat Settings .......................................................................................................................................7
C. Description of Menu Options..........................................................................................................................9
Step 3: How to Program Your Heating and Cooling Schedules ......................................................................................12
System Mode................................................................................................................................................................14
Fan Mode .....................................................................................................................................................................14
Temporary Versus Permanent Hold................................................................................................................................15
Energy Wise Rewards Conservation Period Details .........................................................................................................15
Energy Wise Rewards Program Messages ......................................................................................................................17
Power Loss ...................................................................................................................................................................18
Troubleshooting............................................................................................................................................................19
Your Delmarva Power Energy Wise Rewards thermostat controls your central air conditioning and heating system. The
types of compatible systems include:
Central Air Conditioners:
• Single Stage
• Multi-Stage
Heat Pump*:
• Single Stage
• Multi-Stage
Furnaces:
• Single Stage Gas or Oil
• Multi-Stage Gas or Oil
• Single Stage Electric
• Multi-Stage Electric
• Two-Wire Hydronic
• Millivolt Heat System
Aux Heat:
• Single Stage Electric
• Multi-Stage Electric
All compatible components are connected and configured by the Energy Wise Rewards technician during installation.
*If you have a heat pump, make sure your heat settings are no more than 2˚ between the warmest temperature,
the one you set when you are home, and coolest temperature, the one you set when you are away. Large
temperature differences may enable the auxillary heating mode and potentially cause your electric bill to increase
significantly in the fall and winter months.
13_DDWTMS1317B_IT900_v2_TSTAT_MANUAL-CFO-120413.indd 2 12/4/13 9:41 AM

Delmarva Power Web-Programmable Thermostat Homeowner’s Manual 3
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
Colors: ccccc
Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
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☐URL _________ _________
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DDWTMS1317B
Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
Step 1: Getting Started
A. Thermostat Buttons and Indicators
1Left Arrow Navigates menu items
2Up Arrow Raises temperature setpoint and changes selected menu item
3Action Button Selects action of selected menu item
4LED Light Indicates status of pending, active, or overridden conservation periods
5Right Arrow Navigates menu items
6Down Arrow Lowers temperature setpoint and changes selected menu item
7SYSTEM Button Changes system selection (OFF, COOL, HEAT, AUX [displayed on heat pump
units only])
8FAN Button Changes fan setting (Auto/On)
9Soft Keys Performs action listed on display above the button
9 78
5
6
4
123
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4 Delmarva Power Web-Programmable Thermostat Homeowner’s Manual
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
Colors: ccccc
Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
☐Phone Number _________ _________
☐URL _________ _________
☐Program Details _________ _________
GRAPHIC
DESIGNER
☐SPELL CHECK
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DDWTMS1317B
Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
Step 1: Getting Started
B. Thermostat Display
1Messaging Area Displays day and time, thermostat, and Delmarva Power-related messages. In the
event of a power outage, the clock will maintain the correct time for 48 hours
2Temperature Displays current room temperature
3Setpoint
Temperature
Displays current desired temperature
• Blank when user selects the OFF mode via the menu (turns system off)
• When system is ON, the words SET AT changes to HOLD AT when in temporary
or permanent hold
4FAN Status Blank when in auto mode — displays FAN ON when fan is on continuously
5System Status Displays current operation mode according to system configuration as set by installer
• OFF – system is OFF
• COOL – system is in COOL mode but no call for cool
COOL1 – call for first stage of cool
COOL2 – call for second stage of cool (multi-stage units only)
• AUX – system is in AUX heat mode but no call for heat (heat pump only)
AUX1 – call for first stage of auxiliary heat (heat pump only)
AUX2 – call for second stage of auxiliary heat (multi-stage heat pump only)
• HEAT – system is in HEAT mode but no call for heat
HEAT1 – call for first stage of heat
HEAT2 – call for second stage of heat (multi-stage units only)
HEAT3 – call for first stage of auxiliary heat (heat pump only)
HEAT4 – call for second stage of auxiliary heat (multi-stage heat pump only)
1
2
3
4
5
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Delmarva Power Web-Programmable Thermostat Homeowner’s Manual 5
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
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Mail: mmmmmmm
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Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
Step 1: Getting Started
B. Thermostat Display (Continued)
6Message Icon Indicates unread utility message(s)
7Link Status Indicates status of communications link
8Lock Icon Indicates keypad is locked or temperature control is active
9Soft Key Display Actions to be performed when corresponding button is pressed
6
78
9
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6 Delmarva Power Web-Programmable Thermostat Homeowner’s Manual
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
Colors: ccccc
Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
☐Phone Number _________ _________
☐URL _________ _________
☐Program Details _________ _________
GRAPHIC
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DDWTMS1317B
Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
Step 2: Main Menu and Thermostat Settings
A. Main Menu
The Homeowner Programming Menu table (next page) summarizes the configuration items that the homeowner can
change, and a convenient space to keep track of your settings. For more details on each homeowner programming
menu option, see: Thermostat Settings on page 7, and Description of Menu Options on page 9. To enter the
Homeowner Programming Menu:
1. Ensure the thermostat is at the home screen (see example below).
2. Press the MENU soft key. The display will show the first level of the Homeowner Programming Menu.
3. While in the Homeowner Programming Menu:
• The and buttons scroll the cursor up and down, respectively
• The and buttons scroll the cursor left and right, respectively
• The (Action) button selects the highlighted menu item
• The soft key labeled HOME exits the Homeowner Programming Menu back to the home screen
(NOTE: when the HOME soft key is pressed, any changes made on the current menu item are not saved)
• When changes are made to a menu item, pressing DONE will save the changes and go back one menu level
• If a mistake is made during programming, press HOME once, then return to the programming option and
re-enter the information (press DONE to save changes, press HOME to exit)
4. To exit the menu and return to the program operation, press HOME (when available).
If no keys are pressed within two minutes, the thermostat will revert to normal operation. Any changes made but not
saved by pressing DONE will be lost.
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Delmarva Power Web-Programmable Thermostat Homeowner’s Manual 7
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
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Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
Period
Weekdays Weekend
Start Time Temp Start Time Temp
HEAT MOR
DAY
EVE
NGT
COOL MOR
DAY
EVE
NGT
*If you have a heat pump, make sure your heat settings are no more than 2˚ between the warmest temperature, the
one you set when you are home,
and coolest temperature, the one you set when you are away. Large temperature
differences may enable the auxillary heating mode and
potentially cause your electric bill to increase significantly in the
fall and winter months.
Keep Track of Your Thermostat Settings Below
Step 2: Main Menu and Thermostat Settings
B. Thermostat Settings
Menu Name Submenu
Press or to
Select Other Options
(Defaults in BOLD)
Comments
Heating
Schedule*
Weekdays/
Weekends
Individual
Days
Default settings:
Morning 6:00 am 70°
Day 8:00 am 62°
Evening 5:00 pm 70°
Night 10:00 pm 62°
Use to scroll through items to change
Use to increase/decrease values
When complete, press DONE to save
settings or NEXT to program next period
Cooling
Schedule
Weekdays/
Weekends
Individual
Days
Default settings:
Morning 6:00 am 78°
Day 8:00 am 85°
Evening 5:00 pm 78°
Night 10:00 pm 82°
Use to scroll through items to change
Use to increase/decrease values
When complete, press DONE to save
settings or NEXT to program next period
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8 Delmarva Power Web-Programmable Thermostat Homeowner’s Manual
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
Colors: ccccc
Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
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☐URL _________ _________
☐Program Details _________ _________
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Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
Menu Name
Press or to
Select Other Options
(Defaults in BOLD)
Comments
Backlight Auto
On
Use to change the underlined value
When complete, press DONE to save settings, or HOME
to exit without saving
Temperature
Limits
Min Cool Set Point:
45°F
Max Heat Set Point:
99°F
Use to select setpoint to change
Use to increase/decrease value
When complete, press DONE to save settings, or HOME
to exit without saving
Adjust
Temperature
Display
Current Room Temp
(measured temp)
Desired Offset 0°
Use to increase/decrease value
When complete, press DONE to save settings, or HOME
to exit without saving
Energy
Management
Recovery
(see page 10)
Off
On
Use to change selection
When complete, press DONE to save settings, or HOME
to exit without saving
°F/°C °F
°C
Use to change selection
When complete, press DONE to save settings, or HOME
to exit without saving
Thermostat Lock
(see page 10)
0000 Enter four-digit passcode (default is “0000”). Use
to change which digit is highlighted. Use to
increase/decrease the highlighted digit
When complete, press DONE to save settings, or HOME
to exit without saving the keypad lockout code
Comfort/Economy
(NOTE: Only
displayed for multi-
stage units)
Comfort
Economy
Use to change selection
When complete, press DONE to save settings, or HOME
to exit without saving
Step 2: Main Menu and Thermostat Settings
B. Thermostat Settings (continued)
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Delmarva Power Web-Programmable Thermostat Homeowner’s Manual 9
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
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Quantity: 000,000
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Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
Step 2: Main Menu and Thermostat Settings
C. Description of Menu Options
The following are detailed descriptions of your Energy Wise Rewards thermostat configuration menu options.
1. Programming – Heat/Cool Programming
Your Energy Wise Rewards thermostat can program the Heating and Cooling schedules as Individual Days or
Weekdays/Weekends. Using the Individual Days programming profile, you can program each day of the week with
its own setpoint profile. With a Weekdays/Weekends profile, Monday–Friday has the same setpoint profile while
Saturday–Sunday can be programmed with its own setpoint profile.
2. Thermostat Settings – Backlight
This menu item controls the display backlight. You can choose either:
• AUTO – (Default) Backlight comes on when you press any key. Backlight goes off after a short delay when there is
no button pressed
• ON – Backlight is always On
3. Thermostat Settings – Temperature Limits
Temperature limits can be used to limit how high your heating temperature can be set and how low your cooling
temperature can be set. The range for both values is from 45°F to 99°F.
• Cool Setpoint – 45°F
• Heat Setpoint – 99°F
4. Thermostat Settings – Adjust Temperature Display
This allows you to adjust the displayed temperature up to 5° higher or lower than the actual room temperature.
Your thermostat was accurately calibrated at the factory, but you have the option to change the display temperature
to match your previous thermostat. The current, or adjusted room temperature, will be displayed on the left side of
the screen; your desired offset will be displayed on the right side of the screen.
Options for this menu item include:
• +1° through +5° – Adjusts the displayed temperature a specified number of degrees higher than the measured
room temperature
• 0– (Default) Displays the measured room temperature
• –1° through –5° – Adjusts the displayed temperature a specified number of degrees lower than the measured
room temperature
13_DDWTMS1317B_IT900_v2_TSTAT_MANUAL-CFO-120413.indd 9 12/4/13 9:41 AM

10 Delmarva Power Web-Programmable Thermostat Homeowner’s Manual
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
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Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
☐Phone Number _________ _________
☐URL _________ _________
☐Program Details _________ _________
GRAPHIC
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Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
5. Thermostat Settings – Energy Management Recovery
Options for this menu item include:
• OFF – (Default) The system starts heating or cooling at the start time for the program period
• ON – The system starts heating or cooling before the start time for the program period so that the room
temperature reaches the program setpoint at the period start time
Example: You select EMR ON and have your heat (conventional heating system) programmed to 65° at night and
70° at 7:00 AM (a difference of 5°). Allowing 7 minutes per degree, the thermostat will start calling for heat prior to
the 7:00 AM start time in an attempt to reach the 70° setpoint by 7:00 AM. With EMR OFF, the thermostat will wait
until the 7:00 AM start time to begin heating the home.
6. Thermostat Settings – °F/°C
You can display temperature in either:
• °F – Fahrenheit (Default)
• °C – Celsius
7. Thermostat Settings – Thermostat Lock
The Delmarva Power Energy Wise Rewards thermostat can be locked to
prevent unwanted users from changing the thermostat settings.
• To Lock the Thermostat:
a. Access the Enter PIN Number screen:
1) Press the MENU key
2) Press or to highlight the Thermostat Settings item,
then press
3) Press or to highlight the Thermostat Lock item,
then press
b. 0000 is the default code and needs to be changed to add a
passcode. Press or to choose which digit is highlighted
and or to increase or decrease the number. Press DONE to
save the new PIN number. Please write down your PIN number for
safekeeping. There is a note section in the back of this manual.
A lock icon ( ) will be displayed on the home screen to indicate
the keypad is locked.
Leaving the default PIN number at 0000 will allow any user full
access to your thermostat.
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Delmarva Power Web-Programmable Thermostat Homeowner’s Manual 11
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
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Quantity: 000,000
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☐URL _________ _________
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Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
• To Temporarily Unlock the Thermostat:
a. Press the MENU key to go directly to the Enter PIN Number
screen.
b. Press or to choose which digit is highlighted and
or to increase or decrease the number. Press UNLOCK and
your thermostat will return to the home screen.
c. If the correct PIN number is entered, the thermostat will return to
the home screen and allow the user to make changes as needed.
If the wrong PIN number is entered, the screen at the right will
appear:
• To Permanently Unlock the Thermostat:
a. Follow the steps to temporarily unlock the thermostat (above).
b. Follow the steps to lock the thermostat (see page 10), but enter
0000 to clear the lock code.
c. Press DONE to save the change.
8. Thermostat Settings – Comfort/Economy
This option is only available if you have a multi-stage heating, central air
conditioning, or heat pump system.
• In Comfort mode (default), the higher stages of the heating or
cooling system will be initiated when you modify the temperature
setpoint three degrees or more.
• In Economy mode, the thermostat will analyze when the higher
stages are needed for heating or cooling in order to economize
energy usage.
The thermostat will lock after two minutes of keypad inactivity.
Setting the PIN number to 0000 will allow any user full access to
your thermostat.
13_DDWTMS1317B_IT900_v2_TSTAT_MANUAL-CFO-120413.indd 11 12/4/13 9:41 AM

12 Delmarva Power Web-Programmable Thermostat Homeowner’s Manual
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
Colors: ccccc
Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
☐Phone Number _________ _________
☐URL _________ _________
☐Program Details _________ _________
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Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
Step 3: How to Program Your Heating and Cooling Schedules
1. Press MENU to enter the Main Menu.
2. Press or to highlight Programming, then press .
3. Press or to highlight Heating Schedule or Cooling Schedule,
then press .
4. Press or to highlight Weekdays/Weekends or Individual Days,
then press .
a. Mon–Fri sets all weekdays to the same operating schedule.
b. Sat–Sun sets the weekend days to the same operating schedule.
c. Individual Days allows the user to program each day individually.
If the HOME button is pressed at any point during the programming
sequence, any changes will not be saved and the thermostat will
return to the home screen.
The user can highlight Time-based Programming and change the
setting to Off if the user prefers to change the temperature manually.
To set programmed schedules, Time-based Programming must
be set to On.
If the DONE key is pressed at any point while in the Heating
Schedule or Cooling Schedule menus, any changes will be saved
and the thermostat will return to the previous menu.
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Delmarva Power Web-Programmable Thermostat Homeowner’s Manual 13
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
Colors: ccccc
Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
☐Phone Number _________ _________
☐URL _________ _________
☐Program Details _________ _________
GRAPHIC
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Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
While in any schedule programming screen:
• Pressing HOME will exit without saving changes
• Pressing NEXT will advance to the next day(s) to be programmed
•
Pressing DONE will save any changes and return to the previous menu
5. The Morning Starts At time is highlighted. Press or to adjust the
Morning time period to the desired start time. Press to highlight the
Morning Cool To or Heat To.
6. The Morning Heat To or Cool To (depending on which mode is being
programmed) is highlighted. Press or to adjust the Morning
setpoint to the desired temperature. Press to highlight the Day
Starts At time.
7. Repeat Steps 5–6 for the Day, Evening, and Night Starts At and
Heat To or Cool To setpoints.
8. To change to the next day or group of days (Weekdays or Weekends),
press NEXT. Then repeat steps 5 through 8 as needed.
9. When changes are complete, press DONE.
10. Press HOME after programming is complete and changes have
been saved.
PROGRAMMING TIPS:
• If you don’t want to program a particular day, you can skip it. Press NEXT one or more times until you reach the
desired day.
• If you want to similarly program days in a group with only slight differences, program as a group first, then
program individual days as needed. The individual day program overrides the group program.
13_DDWTMS1317B_IT900_v2_TSTAT_MANUAL-CFO-120413.indd 13 12/4/13 9:41 AM

14 Delmarva Power Web-Programmable Thermostat Homeowner’s Manual
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
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Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
☐Phone Number _________ _________
☐URL _________ _________
☐Program Details _________ _________
GRAPHIC
DESIGNER
☐SPELL CHECK
CREATIVE
DIRECTOR
PROOFREADER COPY
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DDWTMS1317B
Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
SYSTEM MODE
The SYSTEM button selects the system mode of operation — OFF, COOL, or HEAT. If the system is a heat pump,
there is also a selection for AUX to operate the auxiliary heat.
FAN MODE
The FAN button selects whether the fan should:
• Operate constantly to circulate air regardless of the System Mode setting, or call for Heat or Cool. This is
indicated by displaying FAN ON on the display.
• Operate only during a call for Heat or Cool. This is indicated by a lack of FAN ON on the display.
AUX should only be selected if the heat pump cannot supply ample heat in extreme cold conditions or in the
event the heat pump is not operational. Selecting AUX can increase electricity use and costs.
13_DDWTMS1317B_IT900_v2_TSTAT_MANUAL-CFO-120413.indd 14 12/4/13 9:41 AM

Delmarva Power Web-Programmable Thermostat Homeowner’s Manual 15
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
Colors: ccccc
Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
☐Phone Number _________ _________
☐URL _________ _________
☐Program Details _________ _________
GRAPHIC
DESIGNER
☐SPELL CHECK
CREATIVE
DIRECTOR
PROOFREADER COPY
SUPERVISOR
COPYWRITER CREATIVE SERVICES
MANAGER
ACCOUNT
MANAGER
DDWTMS1317B
Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
Energy Wise Rewards Conservation Period Details
The following are detailed descriptions of the Energy Wise Rewards conservation periods.
1. Control Event Pending
The phrase Control Event Pending will appear in the message
rotation at the top of the home screen before an Energy Wise Rewards
conservation period is set to begin. The LED on the Action button ()
will flash until the event begins.
2. Event in Progress
When an Energy Wise Rewards conservation period is in progress, the
phrase Event in Progress will be displayed in the message rotation
at the top of the home screen. The LED on the Action button ()will
maintain a steady light for the duration of the event.
Temporary Versus Permanent Hold
A temporary hold can be set when operating in any mode except for OFF. A
temporary hold is set by pressing the or on the thermostat to adjust the
desired temperature. The SET AT indication of the temperature setpoint will
change to HOLD AT and a message will appear in the thermostat messaging
display area to confirm that a temporary hold is set. A temporary hold setpoint
will be maintained until the start of the next programmed time period or the
RUN soft key is pressed.
A permanent hold can be set when operating in any mode except for OFF. To
set a permanent hold, change the temperature just like setting a temporary
hold. When the desired setpoint is entered, the user will have five seconds to press the PERM HOLD soft key to convert
the temporary hold into a permanent hold. The SET AT by the setpoint will change to HOLD AT and a message will
appear in the thermostat messaging display area to confirm that a permanent hold is set. If the PERM HOLD soft key is
not pressed within five seconds, the hold will remain a temporary hold.
A permanent hold setpoint will override the programmed setpoints and time periods and can only be ended by pressing
the RUN soft key.
13_DDWTMS1317B_IT900_v2_TSTAT_MANUAL-CFO-120413.indd 15 12/4/13 9:42 AM

16 Delmarva Power Web-Programmable Thermostat Homeowner’s Manual
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
Colors: ccccc
Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
☐Phone Number _________ _________
☐URL _________ _________
☐Program Details _________ _________
GRAPHIC
DESIGNER
☐SPELL CHECK
CREATIVE
DIRECTOR
PROOFREADER COPY
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COPYWRITER CREATIVE SERVICES
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DDWTMS1317B
Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
2. Event in Progress (Continued)
The LED colors represent a few different types of conservation periods:
Green – standard Energy Wise Rewards conservation period
Red – PJM-required conservation period (user is unable to opt out)
Yellow – User has opted out of the conservation period
3. Seeing Scheduled Conservation Periods
Delmarva Power Energy Wise Rewards participants can see future scheduled
conservation periods (shown as Control Events on the thermostat).
a. Press the UTILITY button on the home screen.
b. Press or to highlight Control Events, then press .
c. If a conservation period has been scheduled, you can see the details
by pressing .
13_DDWTMS1317B_IT900_v2_TSTAT_MANUAL-CFO-120413.indd 16 12/4/13 9:42 AM

Delmarva Power Web-Programmable Thermostat Homeowner’s Manual 17
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
Colors: ccccc
Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
☐Phone Number _________ _________
☐URL _________ _________
☐Program Details _________ _________
GRAPHIC
DESIGNER
☐SPELL CHECK
CREATIVE
DIRECTOR
PROOFREADER COPY
SUPERVISOR
COPYWRITER CREATIVE SERVICES
MANAGER
ACCOUNT
MANAGER
DDWTMS1317B
Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
Energy Wise Rewards Program Messages
Delmarva Power Energy Wise Rewards can provide specific messaging to participants directly through the thermostat.
When a message is received, an envelope icon ( ) will appear on your home screen.
To access your message:
a. Press the UTILITY button on the home screen.
b. Press or to highlight Messages, then press to access
your message.
c. Press to see the details of your message.
13_DDWTMS1317B_IT900_v2_TSTAT_MANUAL-CFO-120413.indd 17 12/4/13 9:42 AM

18 Delmarva Power Web-Programmable Thermostat Homeowner’s Manual
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
Colors: ccccc
Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
☐Phone Number _________ _________
☐URL _________ _________
☐Program Details _________ _________
GRAPHIC
DESIGNER
☐SPELL CHECK
CREATIVE
DIRECTOR
PROOFREADER COPY
SUPERVISOR
COPYWRITER CREATIVE SERVICES
MANAGER
ACCOUNT
MANAGER
DDWTMS1317B
Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
POWER LOSS
The Energy Wise Rewards thermostat is designed to withstand a power loss without the need of a battery backup. The
thermostat responds to a power loss as follows:
• All Thermostat Settings and Schedule Programming are stored to permanent memory and retained throughout
the power loss.
• The thermostat will return to the same System Mode (Off/Heat/Cool/Aux) it was in prior to the power loss.
• A Permanent Hold will be maintained after a power loss.
• A Temporary Hold will be maintained after a power loss ONLY if still within the same Program Schedule time
period. Otherwise the thermostat will return to operating according to the Program Schedule.
• The thermostat is designed to maintain the clock for at least 72 hours without power. If power has been lost for
more than 72 hours, the clock will return to a factory default time and will update with the next utility
time sync.
• A Conservation Period will be maintained after a power loss if still within the same conservation period.
13_DDWTMS1317B_IT900_v2_TSTAT_MANUAL-CFO-120413.indd 18 12/4/13 9:42 AM

Delmarva Power Web-Programmable Thermostat Homeowner’s Manual 19
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
Colors: ccccc
Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
☐Phone Number _________ _________
☐URL _________ _________
☐Program Details _________ _________
GRAPHIC
DESIGNER
☐SPELL CHECK
CREATIVE
DIRECTOR
PROOFREADER COPY
SUPERVISOR
COPYWRITER CREATIVE SERVICES
MANAGER
ACCOUNT
MANAGER
DDWTMS1317B
Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
Troubleshooting
No Heat or No Cool
Possible Cause Corrective Action
Thermostat may be in an Energy Wise Rewards
conservation period. “Event in Progress” will be
displayed on top line of home screen.
Wait for the Energy Wise Rewards conservation period
to end.
System switch is set to OFF. Press the thermostat’s SYSTEM button one or more
times to select HEAT or COOL (as appropriate).
Heat, Cool, or Fan Runs Constantly
Possible Cause Corrective Action
Fan set to ON. Change Fan to AUTO.
Common Problems: No Heat, No Cool, or No Fan
Possible Cause Corrective Action
Blown fuse or tripped circuit breaker. Replace fuse or reset breaker.
Furnace power switch set to OFF. Turn switch to ON.
Furnace blower compartment door or panel is loose or
not properly installed.
Replace door panel in proper position to engage safety
interlock or door switch.
Thermostat Setting and Thermometer Disagree
Possible Cause Corrective Action
Thermostat thermometer setting requires adjustment. The thermometer can be adjusted +/–5 degrees.
See Adjust Temperature Display on page 9.
13_DDWTMS1317B_IT900_v2_TSTAT_MANUAL-CFO-120413.indd 19 12/4/13 9:42 AM

20 Delmarva Power Web-Programmable Thermostat Homeowner’s Manual
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
Piece: Manual
Quantity: 000,000
Size: sssss
Colors: ccccc
Finishing: ffffffffff
Mail: mmmmmmm
Program Specic Checklist Name: Date:
☐Phone Number _________ _________
☐URL _________ _________
☐Program Details _________ _________
GRAPHIC
DESIGNER
☐SPELL CHECK
CREATIVE
DIRECTOR
PROOFREADER COPY
SUPERVISOR
COPYWRITER CREATIVE SERVICES
MANAGER
ACCOUNT
MANAGER
DDWTMS1317B
Delmarva Power IT900 Thermostat Manual (Version 2 Thermostat with New Screen Shots)
Job Opened: November 1, 2013
Requested In-Home Date: December 1, 2013
Latest Revision: November 5, 2013
Approved: December 4, 2013
Troubleshooting
No Heat
Possible Cause Corrective Action
Pilot light not lit. If it will not stay lit, call for service from your HVAC
contractor.
System switch not set to HEAT. Press the thermostat’s SYSTEM button one or
more times to select HEAT and press to raise the
temperature setpoint above room temperature.
Furnace Lock-Out Condition. Heat may also be
intermittent.
Many furnaces have safety devices that shut down
when a lock-out condition occurs. If the heat works
intermittently, contact the furnace manufacturer or your
HVAC contractor for assistance.
Heating system requires service or thermostat requires
replacement.
To diagnose this condition:
Press SYSTEM button to select HEAT and press
to raise the temperature setpoint above room
temperature. Within a few seconds the thermostat
should make a soft click sound. This sound usually
indicates the thermostat is operating properly. If the
thermostat does not click after being reset, contact
Delmarva Power Energy Wise Rewards for a replacement
thermostat. If the thermostat does click, contact the
furnace manufacturer or your HVAC contractor for a
service visit to verify the heating is operating correctly.
Furnace or Air Conditioner Cycles Too Fast or Too Slow (Narrow or Wide Temperature Swing)
Possible Cause Corrective Action
The location of the thermostat and/or the size of the
heating system may be influencing the cycle rate.
Electronic thermostats, like this one, normally
provide precise temperature control and may cycle
faster than some older mechanical models. A faster
cycle rate means the unit turns on and off more
frequently to maintain the desired temperature, but
runs for a shorter time so there is no increase in overall
energy use.
13_DDWTMS1317B_IT900_v2_TSTAT_MANUAL-CFO-120413.indd 20 12/4/13 9:42 AM