BLUEHELIX TECH RRT 24 H
185EN
cod. 3541C661 - Rev. 00 - 10/2018
Replacing the main exchanger
A
Before carrying out the following instructions it is advisable to protect the room and the boiler’s electrical box
against accidental water spillage.
fig. 40- Main exchanger
• 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 heating circuit.
• Extract the flue connection (concentric or accessory for separate ducts)
• Remove the fan
• Remove the clips 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
• Fit the new exchanger on the bottom screws “5”
• For assembly, proceed in reverse order