Technical data

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3.5 Turning the boiler OFF
• TurnboththeCHcontrolknobandtheDHWcontrolknobtotheOFF
position.
• TurnthegasandelectricitysuppliestotheboilerOFF.
• IftheboilerisswitchedOFFwhenthereisalikelihoodoffrost;water
in the boiler should be drained off by opening the house central heat-
ing drain tap.
3.6 Central Heating System Discharge
Do the following in case of a discharge of the central heating system
water;
• Turnonthedraintapatthebottomofthecentralheatingsystem.
• Opentheairreleasetapsofradiators.Beginfromtopradiatortobot-
tom one.
• Closetheairreleasetapsafterdrainingthewater.
ATTENTION! It is not recommended to discharge the system except for
the necessary events.
• Whentheboilerisswitchedoffattheswitchonthecontrolpanel,the
word OFF appears on the display. The D.H.W and central heating
frost protection system, nevertheless, remain enabled. If the boiler
was previously on, it is switched off and the post-ventilation, pump
overrun, circulation pump and three-way valve inactivity protection
functions are enabled.
3.7. Topping-up the system with water
The water pressure in the central heating circuit must be checked in
caseofaDHWrequesterrornotication.Thepressuregaugelocated
in front of the pump, should be within the green region and must not be
less than 1 bar.
Ifthereisinsufcientwaterinthe
boiler, the error code F0 (Table 7)
will appear on the display indicat-
ing that there is not enough water
in the system.
Figure 9 Hydraulic Group- Manual filling tab