339
EN
cod. 3541V481 - Rev. 00 - 06/2021
Main exchanger replacement
A
Before carrying out the following instructions it is advisable to protect the room and the
boilers electrical box against accidental water spillage.
B
Disconnect the power supply and close the gas cock
ahead of the valve
Disconnect the fume sensor connector
1
.
Disconnect the fan connector
Disconnect the connector of the ignition
electrode connected to the board.
Drain the water from the boiler heating
circuit.
Remove 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
Loosen the 2
bottom
screws 5 securing
the exchanger to the frame (fig. 49)
Remove the 2
top
screws 6 securing
the exchanger to the frame (fig. 50)
Remove the exchanger
Insert the new exchanger, resting it on
the
bottom
screws "5"
For assembly, proceed in reverse order
fig. 46
fig. 47
Summary of Contents for 0T4D1AWA
Page 1: ...INSTRUCTIONS FOR USE INSTALLATION AND MAINTENANCE ...
Page 39: ...334 EN cod 3541V481 Rev 00 06 2021 fig 40 ...
Page 45: ...340 EN cod 3541V481 Rev 00 06 2021 fig 48 fig 49 fig 50 ...
Page 53: ...348 EN cod 3541V481 Rev 00 06 2021 4 4 Technical data table ...
Page 54: ...349 EN cod 3541V481 Rev 00 06 2021 ...
Page 55: ...350 EN cod 3541V481 Rev 00 06 2021 ...
Page 56: ...351 EN cod 3541V481 Rev 00 06 2021 ...
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