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2.10 SYSTEM USE
Before ignition make sure the heating system is filled with water and that the pressure gauge (8, Fig. 48) indicates a pressure of 1
- 1.2 bar.
– Open the gas cock upstream from the indoor unit.
The indoor unit operates automatically according to the settings on the control panel. With no demand for heat (central heating or do-
mestic hot water production) the indoor unit goes to "standby" function, equivalent to the indoor unit being powered without presence of
flame.
Each time the burner ignites, the relative flame present symbol is displayed (11, Fig. 48) with relative output scale.
Solar operating mode (
This function is activated automatically if the indoor unit detects a probe on the DHW inlet (optional) or if the "Solar ignition delay" pa-
rameter is more than 0 seconds.
During a withdrawal, if the inlet water is hot enough or if there is "Solar ignition delay" time, the indoor unit does not switch on, the
D.H.W. withdrawal symbol (
When the water supplied by the solar system is at a temperature lower than what is set, and if the "Solar ignition delay" time has elapsed,
the appliance switches on. At this point, the solar function symbol remains permanently on.
"Off" mode
By holding the "
" button down for 8 seconds, the display switches-off and the indoor unit is off completely. The safety functions are
not guaranteed in this mode.
In "Stand-by" and "Off" mode, the appliance is to be considered still live. In "Off" mode, a lit
"dot" is displayed in the centre of the display.
Display operation
The display lights up while the control panel is being used; after a set inactivity period, the brightness drops until only the active symbols
are displayed. The lighting mode can be varied via parameter "t8" in the P.C.B. programming menu.
)
) appears on the display along with the flashing solar function symbol (
).
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