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     · In the above circuit you can make it work as a recycling timer simply by removing the entire D1 link and the ON/OFF ratio can be also modified by changing the T1/R4 connection configuration with the IC output pinouts.

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     · In the above circuit you can make it work as a recycling timer simply by removing the entire D1 link and the ON/OFF ratio can be also modified by changing the T1/R4 connection configuration with the IC output pinouts.

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    Unclip and remove the circuit board Remove the display unit and timer (if fitted) Clip the new circuit board in position reconnect all the wires and refit the covers Raise the unit and reinstall the display unit and timer (if fitted) Recommission boiler as per procedure The new circuit board must be adapted to the heating unit therefore

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