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ULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - SERVICE MANUAL
Technical Literature Department 28 of 52 Ashland City, TN © 2008
Servicing should only be performed by a Qualified Service Agent
UIM (CONT)
User input buttons on the UIM include an Up, a Down, and three Operational buttons.
The Up and Down buttons are used to navigate through the various menus and screens
displayed and to adjust or change user settings such as the Operating Set Point.
The three Operational buttons are multifunctional. Their function is defined by the text that
appears above each button on the UIM display. The Operational button’s function will
change depending on what menu or screen is currently displayed.
Commercial & Residential Product Differences
The illustration below shows the control system’s “Desktop” screen. This is the control
system’s default screen. If there are no active fault messages and no user input for
approximately 10 minutes the control system will return to this screen automatically.
The water heater covered by this Service Manual is available in commercial and residential
models. The “Tank Temperature” data shown on the desktop screen below will not be visible
on residential models. Tank Temperature will be displayed on the commercial models only.
The maximum Operating Set Point for a residential model will be 160°F (71°C). Maximum
Operating Set Point on commercial models will be 180°F (82°C).
Discreet Menu - Contact Information
While viewing the Desktop screen (above). Press and hold down the middle Operational
button for 30 seconds and then release it. This will launch a discreet menu with a provision
for entering personalized contact information. Installing contractors and/or service
technicians can enter their company name and telephone number. This contact information
would be displayed with all fault messages whenever the control system was in a lock out
condition.
UIM - User Interface Module Display
Up & Down
Buttons
Operational
Buttons