6
OPTIMAX HE PLUS S
Cod. 3540R543 - 08/2012 (Rev. 00)
Turning off
Press the
on/off
button (part. 7 -
fi
g. 1) for 5 seconds.
fdp
dpngpsu
sftfu
fi
g. 6 - Turning off
When the boiler is turned off with this key, the p.c.b is still powered, heating operation is disabled and the display is off
however the frost protection will still be active.
To totally isolate close the gas cock ahead of the boiler and disconnect electrical power.
To avoid damage caused by freezing during long shutdowns in winter, it is advisable to drain all water from the
system.
To turn boiler on again, press the
on/off
button (part. 7 -
fi
g. 1) for 5 seconds
fdp
dpngpsu
sftfu
fi
g. 7
The boiler is ready to function automatically whenever the external controls are calling for heat.
1.4 Adjustments
Heating temperature setting
To set the system
fl
ow temperature, use the CH push buttons (part. 3 and 4 -
fi
g. 1). It can be varied from a minimum of
20°C to a maximum of 90°C.
fdp
dpngpsu
sftfu
fi
g. 8
Room temperature adjustment (using a room thermostat)
Using the room thermostat, set the temperature desired. Controlled by the room thermostat, the boiler lights and heats
the system water to the system delivery setpoint temperature. The burner shuts down when the desired temperature in
the room is reached.
A room thermostat and programmer are a mandatory requirement (Building regulations Doc ‘L’ 2002).
