54
Servicing should only be performed by a Qualified Service Technician
CONTROL OVERVIEW
Interaction with the water heater controller is through an UIM display called the
User Interface Module
(UIM)
. This screen is also referred to as the
“desktop”
or
“desktop menu”
. Up and down buttons and
three operation buttons allow navigation through the control menus and to make adjustments to the water
heater. Operation of the three lower buttons is defined immediately above them on the screen.
While the water heater is operating, the user interface will display the UIM screen (if there are no active
faults or warnings).
An example of this screen is shown below.
•
The first temperature on this screen is the temperature of the water inside the tank.
•
The second temperature on this screen is the
Operating Set Point
. The
Operating Set Point
is the
temperature at which the water heater will maintain the water inside the tank.
•
The third line on the screen is a text description of the Operational State of the water heater. The
operational state of the water heater is also indicated graphically by status icons.
Tank Temperature
103°F
Operating Set Point
120°F
Status: Heating
MENU
HELP
GAS
OFF
O
N
MANUFACTURER / MODEL INFORMATION
LCD Screen
Information
Display
Status Icons
3 Operational buttons:
enter/exit menus,
select menu items,
activate adjustment modes,
confirm/cancel changes.
Up & Down buttons:
navigate menus,
adjust user settings
Title Bar
Operational buttons are multi functional. Their current function is defined by
the text that appears directly above each button on the LCD screen.
UIM (User Interface Module)
UP
DN
(UIM) User Interface Module Screen
