19 Heat exchanger cover
❒ Check fibre-glass seal for perfect alignment on the door frame
➥ Check the imprint on the fibre-glass seal.
If the imprint of the seal is broken:
❒ The seal is no longer guaranteed
❒ Tighten the door latches or change the fibre-glass seal.
20 Cleaning port door + combustion chamber door
❒ Check fibre-glass seal for perfect alignment on the door frame
➥ Check the imprint on the fibre-glass seal.
If the imprint of the seal is broken:
❒ The seal is no longer guaranteed
❒ Tighten the door latches or change the fibre-glass seal.
➥ If you adjust the combustion chamber door, check that the door switch is work‐
ing. Reset if necessary.
21 Combustion air blower fan
❒
Clean any dust and deposits from the protective grating
❒ Dismantle the protective grating and clean the fan with a soft brush where neces‐
sary
22 Induced draught fan + FGP blower
Servicing
4
Maintenance schedule
Operating Instructions TM 150/199/220 | B0310611_en 37
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