18 Delmarva Power Web-Programmable Thermostat Homeowner’s Manual
DDWTMS1317B—Delmarva Power IT900 Thermostat Manual
(Version 2 Thermostat with New Screen Shots)
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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
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
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