Outside Temperature Compensation - Fer FERSYSTEM TECH 31 C Instructions For Use, Installation And Maintenance

FERSYSTEM TECH 31 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 (part.7 - fig.1). In ECO mode the display
shows the relevant symbol (part. 12 - fig. 1). To turn on COMFORT mode, press (part.7 - fig.1) again,
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 (Part. 3 and 4 – fig. 1) is possible to set the maximum flow temperature
for the installation.
O.T.C. setting
To enter the OTC mode, press (Part. 6 – fig. 1) for 5 seconds.
The display shows CU flashing (fig. 11); to set Curve, use the DHW push buttons (Part. 1 and 2 – fig.
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).
eco/comfort
reset
fig. 11
By pressing the CH push buttons (Part. 3 e 4 – fig. 1), the display shows OF flashing (fig. 12); to
set Offset, use the DHW push buttons (Part. 1 and 2 – fig. 1). It can be varied from 20 to 40, in
accordance with the chart (fig. 14).
eco/comfort
reset
fig. 12
9
Cod. 3540U320 - 09/2009 (Rev. 00)