15 Version 10.08.2011
Combined filter replacement
If the Filter monitoring option is fitted the requirement for combined filter change is
indicated by the filter alarm signal and LEDs not going off after the pre filter has been
changed. For units fitted with the VOC monitor option, the requirement for a
combined filter change (gas portion saturated) is indicated by illumination of the Gas
filter alarm light on the front panel. Please note that the carbon media within the
combined filter is hygroscopic and will absorb moisture from the atmosphere. This is
why the gas filter should be changed every twelve months regardless.
Combined filter replacement
1. Isolate the electrical supply to the unit.
2. Undo the latches on either side of the unit and lift the motor section off.
3. Remove the filters from the base.
4. Vacuum out any dust in the base.
5. Remove the pre filter from inside the combined filter and if still serviceable fit
into a new combined filter.
6. Locate the filters into the base.
7. Replace the motor section and fasten the latches.
8. Reconnect the power supply.
Consumable Spares
Pre Filter
Combined Filter
Fuses
Thermal trip (built
into switch)
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