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Replacement of the master board, slave board and BUS
8.
Move the heat exchanger box by holding it on the strap up and down so that the heat exchanger box is
unlocked out of the tongue-and-groove joint. Pull the heat exchanger box out of the device.
9. Loosen the 2 locking screws of the control system casing by approx. 4 - 6 mm by turning them counter
clockwise and remove the cable for potential equalisation from the flat plug of the control system
casing.
thermostat
17
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