Mira Zest 7.5 Installation, Operation And Maintenance Manual page 25

7. Carefully pull the flow valve and switch assembly and the heater tank away from
the case. Make sure that you ease the inlet connector off the inlet supply pipe.
8. Remove the brown and red wires from one side of the thermal switch and the second
brown wire from the other side of the thermal switch.
9. Remove the fixing screw and remove the thermal switch and green earth bonding
wire.
Caution! Do not press printed disc on the replacement thermal switch as this will
make the component unserviceable.
10. Refit the components in reverse order. Make sure that the electrical wires are installed
in the correct positions.
Inlet Filter - Replacement
WARNING! Isolate the electrical and water supplies before removing the cover. Mains
electricity connections are exposed when the cover is removed.
1. Remove the three cover retaining screws, the cover and the service tunnel.
2. Remove the screws that hold the inlet clamp bracket in position and remove the
clamp bracket.
3. Loosen the screws that hold the flow valve and switching assembly and the heater
tank in position.
4. Carefully pull the flow valve and switching assembly and the heater tank away from
the case. Make sure that you ease the inlet connector off the inlet supply pipe.
5. Pull off the inlet connector complete with 'O' seal. Use a suitable tool to withdraw
the inlet filter. Discard the inlet filter.
6. Renew the inlet filter.
7. Refit the components in reverse order.
'O' Seal
Inlet Connector
Inlet Filter
Clamp Bracket
Inlet Filter - Replacement
Clamp Bracket
Retaining Screws
Flow Valve
Assembly
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