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Replacing the main exchanger
Before carrying out the following instructions it is advisable to protect the area and the boiler's PCB housing
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. 41)
•
Loosen the 2 bottom screws "5" securing the exchanger to the frame (fig. 41)
•
Remove the exchanger
•
Insert the new exchanger, resting it on the bottom screws "5"
•
For assembly, proceed in reverse order
34
BLUEHELIX PRO RRT 24 C
5
5
6
5
5
fig. 41- Main exchanger
cod. 3541T010 - Rev. 00 - 10/2019
3
4
3
3
EN
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