Ferroli BLUEHELIX PRO RRT 24 C Instrucciones De Uso, Instalación Y Mantenimiento página 188

Replacing the main exchanger
Before carrying out the following instructions it is advisable to protect the room and the boiler's electrical box
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against accidental water spillage.
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• Disconnect the power supply and close the gas cock ahead of the valve
• Disconnect the fume sensor connector
• Disconnect the fan connector
• Disconnect the connector of the ignition electrode connected to the board.
• Drain the water from the boiler's heating and DHW circuit.
• Extract the flue connection (concentric or accessory for separate ducts)
• Remove the fan
• Undo the rings of the two pipes on the exchanger, pump and hydraulic unit
• Remove the 2 top screws "5" securing the exchanger to the frame (fig. 40)
• Loosen the 2 bottom screws "5" securing the exchanger to the frame (fig. 40)
• Remove the exchanger
• Insert the new exchanger, resting it on the bottom screws "5"
• For assembly, proceed in reverse order
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BLUEHELIX PRO RRT 24 C
5
5
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5
5
fig. 40- Main exchanger
cod. 3541Q530 - Rev. 00 - 10/2018
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EN