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FERSYSTEM TECH 38 C
Economy/Comfort selection
The unit is equipped with a special internal device that ensures a high hot-water delivery speed and
excellent user comfort. When comfort mode is active the water in the boiler is maintained at a pre-de-
termined temperature, which means that hot water is available at the boiler outlet as soon as a tap is
opened, ie with no waiting.
The user can turn the device off (ECO mode) by pressing
shows the relevant symbol (part. 12 - fig. 1). To turn on COMFORT mode, press
the ECO symbol will vanish from the display.
Outside temperature compensation
When the (optional) external sensor kit is fitted to the appliance, the system can work in Outside tem-
perature compensation mode. In O.T.C. mode the temperature of the heating system is controlled
according to the external climate conditions, this will guarantee a high degree of comfort and energy
saving all year round.
By the CH push buttons
for the installation.
O.T.C. setting
To enter the OTC mode, press
The display shows CU flashing (fig. 11); to set Curve, use the DHW push buttons
1). It can be varied from 1 to 10, in accordance with the chart (fig. 13). O means no O.T.C. mode.
It is recommended a start point of 20 - 30°C and a flow temperature of 85°C is required for the UK
(Curve 9 or 10).
By pressing the CH push buttons
set Offset, use the DHW push buttons
accordance with the chart (fig. 14).
(Part. 3 and 4 – fig. 1) is possible to set the maximum flow temperature
(Part. 6 – fig. 1) for 5 seconds.
eco/comfort
reset
fig. 11
(Part. 3 e 4 – fig. 1), the display shows OF flashing (fig. 12); to
(Part. 1 and 2 – fig. 1). It can be varied from 20 to 40, in
eco/comfort
reset
fig. 12
Cod. 3540U330 - 09/2009 (Rev. 00)
(part.7 - fig.1). In ECO mode the display
(part.7 - fig.1) again,
(Part. 1 and 2 – fig.
9
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