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1.3 Turning ON and OFF
Without main power supply
To avoid damage caused by freezing during long shutdowns in winter, it is advisable to drain all
water from the system.
Ignition
Ensure the power is on to the appliance.
•
For the first 120 seconds, the display shows FH that identifies the Air purge function.
•
During the first 5 seconds, the display shows the software version of the pcb.
•
Open the gas cock on the boiler and purge the air from the pipework upstream of the gas valve.
•
When the FH disappears, the boiler is ready to function automatically whenever the external controls
are calling for heat.
Turning off
Press the
(part. 7 - fig. 1) for 5 seconds.
6
fig. 3 - Boiler without main power supply
eco
comfort
reset
fig. 4 - Ignition
comfort
reset
fig. 6 - Turning off
Cod. 3540M162 - 02/2008 (Rev. 00)
OPTIMAX HE 18 OV
eco
comfort
reset
eco
eco
comfort
reset
fig. 5 - Air purge
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