THERMOSTAT SETTINGS - electronic CONTROLs
These models are equipped with an electronic control system. The control system senses temperature from a factory installed Immersion Temperature Probe (see Figure 1). The “Operating Set Point” is adjusted to control water temperature. This is an adjustable user setting in the control system’s “Temperatures Menu.” This and all control system menus are accessed through the UIM (User Interface Module - see Figure 5) located on the front panel of the water heater.
The Operating Set Point is adjustable from 90°F/42°C to 190°F/88°C. The factory setting is 120°F/49°C. See the Electronic Control Models Operation section of this manual for instructions on how to adjust the Operating Set Point and other user settings.
UIM (User Interface Module)
FIGURE 5
Set the Operating Set Point at the lowest setting which produces an acceptable hot water supply. This will always give the most energy efficient operation.
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.
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 7 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.
UIM - USER INTERFACE MODULE | FIGURE 7. |
FIGURE 6. |
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