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ELECTRONIC CONTROL MODELS OPERATION
CONTROL SYSTEM FEATURES
Advanced Diagnostics: Plain English text and animated icons
display detailed operational and diagnostic information. LCD
screen on the front of the water heater displays the Sequence
of Operation in real time. Fault or Alert messages are displayed
when operational problems occur. Advanced Service menu
displays a list of possible causes for current Fault and Alert
conditions to aid in servicing.
Economy Mode Operation: Control system automatically
lowers the Operating Set Point by a programmed value during
user defined time periods. Helps reduce operating costs during
unoccupied or peak demand periods.
Linear Sequencing: Banks of heating elements (3 elements
per bank) are energized according to adjustable (1 to 20°)
differential set points for each bank. First bank on is the last
bank off. Helps reduce operating costs during low/moderate
loads.
CONTROL SYSTEM NAVIGATION
The UIM (User Interface Module) is located on the front cabinet
of the Electronic Control Model water heaters. All operational
information and user settings are displayed and accessed
using the UIM. The UIM includes five snap acting (momentary)
user input buttons; an Up, Down and 3 Operational Buttons.
Figure 13. User Interface Module (UIM)
UP & DOWN BUTTONS
Used to navigate (up and down) and to select (highlight) menu
items. Also used to adjust or change (increase/decrease, on/
off, set time) various user settings.
OPERATIONAL BUTTONS
The 3 Operational Buttons are multifunctional. Their current
function is defined by the text that appears above each button
on the LCD screen. The function will change depending on what
menu is currently displayed or what menu item is selected.
When no text appears on the LCD screen above an Operational
Button there is no function assigned.
THE DESKTOP SCREEN
Figure 14. Model Information Screen below shows the control
system "Desktop Screen." This is the default screen. If there
are no active Fault or Alert conditions and no user input for
approximately 10 minutes the control system will return to this
screen automatically.
MODEL INFORMATION
Model information and menu titles are shown in the black bar
at the top of the Desktop Screen.
TANK TEMPERATURE
Current water temperature as sensed from the immersion
Temperature Probe.
Operating Set Point: Temperature at which the control system
will maintain tank (water) temperature in the Normal Mode. This
line of text will read Economy Set Point whenever the control
system is operating in the Economy Mode.
Status: The Operating State of the control system is displayed
beneath the Operating Set Point.
Figure 14. Model Information Screen
Menu: The left Operational Button is pressed to enter the Main
Menu where all control system menus are accessed. See Table
10 for a list of control system menus.
Help: The right Operational Button is pressed to access
instructions and explanations for user settings, Operating
States, Status Icons, manufacturer's web address, technical
support phone number and service agent contact information.
Day/Time/Operating Mode: The current time and day are
also displayed on the Desktop Screen. "Clock Not Set" will be
displayed until the time clock has been initially set. Day and
Time are adjusted in the Economy Mode Setup menu. The
current Operating Mode, either Normal Mode or Economy
Mode, is displayed beneath the day and time.
Discreet Menu Contact Information: From the Desktop
Screen press and hold down the middle (unmarked)
Operational Button for 30 seconds and then release it. This will
launch a discreet menu where personalized contact information
can be entered. Installing contractors and/or service agents can
enter their company name and telephone number. This contact
information will be displayed with all Fault and Alert messages.
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