9 Settings
9.1 Operator interface
The operator interface is completely menu-driven and enables the user to change settings
and to verify the status and history of the water heater.
For more information about how to use the operator interface, refer to
Operator interface
(see section 3).
9.2 Service program
The service program is used by the installation engineer or service and maintenance
engineer for:
Displaying the water heater history;
Displaying the error history;
Displaying the water heater history;
Display the selected water heater;
Switching the pump on or off;
Setting the service interval;
Service mode;
Setting legionella prevention;
Setting the central heating configuration.
These sub-menus are briefly described in the following paragraphs.
Note
The notation convention for the service menu is identical to that of the main menu (see
section 4.3.1). The difference is, you use [ ] to bring up the service program, instead
of [ ] which brings up the main menu.
9.2.1 Hysteresis
The water heater does not start immediately when the water temperature is below the
temperature setpoint. To prevent that the water heater switches on and off too often,
there is a margin; the hysteresis.
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