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CONTROL SYSTEM OPERATIONCONTROL SYSTEM 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 dened
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°) dierential
set points for each bank. First bank on is the last bank o. Helps
reduce operating costs during low/moderate loads.
CONTROL SYSTEM NAVIGATION
The user interface module (UIM) 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 ve snap acting (momentary) user input buttons; an
Up, Down and 3 Operational Buttons.
Figure 11. UIM - User Interface Module
UP & DOWN BUTTONS
Used to navigate (up and down) and to select (highlight) menu items.
Also used to adjust or change (increase/decrease, on/o, set time)
various user settings.
OPERATIONAL BUTTONS
The three Operational Buttons are multifunctional. Their current
function is dened 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.
HOME SCREEN
Figure 5 below shows the control system “Home 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 Home 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 12. Status Information on Home Screen
Menu: The left Operational Button is pressed to enter the Main Menu
where all control system menus are accessed. See Table 8 (page
22) 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 Home 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 Home 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.
Printed on 5/6/2022 7:17 AM CT
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