Turning On And Off; Adjustments - Ferroli Optimax 25 C Instructions For Installation, Use And Maintenance Manual

1.3 Turning ON and OFF

Ignition
• Open the gas cock on the boiler.
• Purge the air from the pipework upstream of the gas valve.
• Ensure the power is on to the appliance.
• Press the key to turn the appliance on (fig 1 item 2)
• The boiler is now ready to function automatically whenever the external controls are calling for
heat.
Turning off
Press the key for 5 seconds (see fig. 1).
When the boiler is turned off with this key, the p.c.b is still powered, heating operation is disabled and
the display appears
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.

1.4 Adjustments

Room temperature adjustment (using a room thermostat )
Using the room thermostat, set the temperature desired in the rooms. Controlled by the room ther-
mostat, 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).
Heating temperature setting
To set the system flow temperature, use the C.H control knob (ref. 1 - fig. 1). It can
be varied from a minimum of 20°C to a maximum of 90°C.
To set the central heating temperature, use the C.H control knob. Turning it clockwise
increases the temperature, turning it anticlockwise decreases it.
When adjusting the control knob the display will flash for 5 seconds and
display the set point temperature. It will then revert to showing the actual
temperature.
Domestic hot water temperature adjustment
To set the hot water temperature, use the D.H.W. control knob. Turning it clockwise
increases the temperature, turning it anticlockwise decreases it. It can be varied from
a minimum of 40°C to a maximum of 65°C.
When adjusting the control knob the display will flash for 5 seconds and
display the set point temperature. It will then revert to showing the actual
temperature.
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however the frost protection will still be active.
Optimax 25 C