IS 619 ECN 3949
Page 6 of 10
Regular Operation
The boiler starts automatically when the water supply is turned on. During the
heating cycle, only small quantities of water are added to ensure hot water is
always available at the tap.
The boiler is designed to be permanently switched on: it is only necessary to turn it
off for de-scaling or maintenance.
Water is drawn off through the tap (E).
Adjustment – Water temperature, screen backlight and contrast
Consult Fig 1.
Turn power off and on again. The FilterFlow screen (B) is displayed on the control
panel (A).
Press and hold the
power
button (D) until the software version is displayed. Press
the function button
Fn
(C) and the temperature will be displayed.
Press the
power
button to cycle through the values 70-96 Deg C. Press the
Fn
button to select the required value.
The backlight adjustment screen is displayed next. Press the
power
button to cycle
through values 1-25. Press the
Fn
button to select the required value.
The contrast adjustment screen is displayed next. Press the
power
button to cycle
through values 35-60. Press the
Fn
button to select the required value.
Press the
power
button to exit.
Standby
If the boiler is to be left unused for any length of time, turn the element off by
pressing the
power
button.
Filter replacement (NBB3F ONLY)
The filter display shows the estimated life remaining in the filter cartridge (Fig 2). A
reminder message is displayed when the filter needs changing. The boiler can be
used without a filter, but scale will build up quickly and water taste may be affected.
