93
EN
Cod. 3541T090 - Rev. 00 - 06/2019
MAINTENANCE
Boiler - Circulating pump
A
Before carrying out the following instructions it is advisable to protect the room and the boiler’s electrical box against accidental water spillage.
4
fig. 186 - Circulator replacement / maintenance
• Disconnect the power supply and turn off the gas cock ahead of the valve.
• Electrically disconnect the circulating pump, releasing the connections by raising the detail “1” of fig. 186.
• Drain the water in the boiler (see “15.5 System draining” on page 89)).
• Unscrew and remove the circulating pump motor assembly (“4” di fig. 186).
Boiler - 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. 187 - Main exchange
• 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 indoor unit. (see “15.5 System draining” on page 89).
• 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. 187)
• Loosen the 2 bottom screws “5” securing the exchanger to the frame (fig. 187)
• Remove the exchanger
• Fit the new exchanger on the bottom screws “5”
• For assembly, proceed in reverse order
Содержание OMNIA HYBRID C
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