3.2Removing the Front Panel
system (sect. 3.4) and run it until the temperature has reached the boiler operating temperature. The system must then be immediately flushed through. The flushing procedure must be in line with BS 7593:1992 Code of practice for treatment of water in domestic hot water central heating systems.
During this operation, we highly recommend the use of a central heating flushing detergent (Fernox Superfloc or equivalent), whose function is to dissolve any foreign matter that may be in the system.
Substances different from these could create serious problems to the pump or other components.
The use of an inhibitor in system such as Fernox
Failure to carry out this procedure may invalidate the appliance warranty.
To remove the front panel of the casing, proceed as follows:
1.Remove the screw “F” located on the top edge of the panel.
2.Lift and unhook the panel.
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3.3 Control Panel
A/23 MFFI - A/27 MFFI
40 50 60 70 80 
C 
C 
A - Ignition Lockout Reset Button/Safety (Overheat)Thermostat Reset
B - Ignition Lockout L.E.D.
C - Selector Knob for Summer/Winter/Flue Analysis Modes*
D - Low System Water Level L.E.D.
E- Temperature Adjustment Knob for Domestic Hot Water
F- Heating System Thermometer
G- Safety (Overheat)Thermostat Intervention L.E.D.
H- Adjustment Knob for Heating Temperature
I- On/Off L.E.D.
L - On/Off Switch
O - System Pressure Gauge
* Warning the flue analysis mode must only be selected by a qualified service engineer.
18 | B023 |