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1. Shift to the centre against the stop clamps of 2 covers of 1 filter of a heater. |
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2. Remove downwards a cover 1. Take out from the case of a heater the holder 2 with a filtering element. |
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4. Take out filtering element 2 of the holder 1. |
| 5. Establish a new filtering element upside-down and reliably fix a cover. |