Ferroli BLUEHELIX 352 RRT 28 C Instructions For Use & Installation page 188

Replacing the main exchanger
Before carrying out the following instructions it is advisable to protect the room and the boiler's electrical box
A
against accidental water spillage.
2
1
• 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
188
BLUEHELIX PRO RRT 28 C
5
5
6
5
5
fig. 40- Main exchanger
cod. 3541Q440 - Rev. 01 - 07/2020
3
4
3
3
EN