Ferroli DOMINA 102 DGT Installation, Servicing And User Instructions Manual page 27

7.05 Air pressure switch (fig. 27)
• Isolate electricity
• Remove outer case (two screws bottom rear corners)
• Open room sealed department
• Remove the two screw "A" fixing air pressure switch
• Disconnect electrical leads "B"
• Remove pressure sensing tubes (white=D; Red=C)
• Note relevant positions of all connections and
replace in reverse order.
7.06 D.H.W. temperature sensor or Central Heating Temperature Sensor
(fig. 28)
• Isolate electricity and water supplies
• Remove outer case (two screws bottom rear corners)
• Remove the two securing screws and lower control panel
• Identify the sensor from figure 28
• Disconnect electrical connection to the sensor
• Drain the affected service either D.H.W. or C.H.
• Unscrew the sensor
• Replace in reverse order
7.07 Water Pressure Switch (fig. 28)
• Isolate electricity and water supplies
• Remove outer case (two screws bottom rear corners)
• Remove the two securing screws and lower control panel
• Identify the switch from figure 28
• Disconnect electrical connections + note positions to the switch
• Drain the boiler
• Unscrew the sensor
• Replace in reverse order
7.08 Safety Valve (fig. 28)
• Isolate electricity and water supplies
• Remove outer case (two screws bottom rear corners)
• Remove the two securing screws and lower control panel
• Identify valve from fig. 28
• Drain the boiler
• Release the outlet union to the valve and undo the valve
union connection
• Remove the valve outlet fitting
• Replace in reverse order
DOMINA 102 DGT
Water pressure switch
C.H. sensor Safety valve
A
B
C
D
Fig. 27
D.H.W.
sensor
Fig. 28
27