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9-7 Dust filter
9-7-1 If the dust filter contains lots of moisture or is polluted through the visible verification, replace it.
9-7-2 Split the filter from B, and split C and D.
9-7-3 After replacing the filter with new one, re-assemble it in the reverse order of disassembly.
9-8 Zero filter(
Activated charcoal filter)
9-8-1 It is recommended to replace the zero filter at the 6-month cycle.
9-8-2 Split the filter from B, and split C.
9-8-3 After replacing the filter with new one, re-assemble it in the reverse order of disassembly.
