14
Version 1 Oct 2009
Caution: When changing used filters always wear mask, safety glasses and gloves.
Filter replacement indication
The first few filter changes should only apply to the pre-filter. The indication that the
Combined filter needs replacing is when the filter alarm signal and LED’s (if fitted) do
not go off after the pre filter has been changed.
If the VOC monitor option is fitted, the requirement for a combined filter change 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 these filters should be changed
every twelve months regardless.
Pre filter replacement
The pre filter needs changing when the filter change signal is alarmed and/or the
green amber and red LED
’s on the unit are illuminated (if option fitted).
1. Isolate the electrical supply to the extractor.
2. Undo the two catches on the front of the unit and open the door.
3. The pre filter is the lower of the two filters (see Fig 11). Using the handle, on the
front of the filter, pull it out of the unit being careful to support it as it comes free
as it is heavy.
4. Slide a clean filter back into position making sure it is pushed all the way in to
locate on the spigot at the back of the unit.
5. Close the door and fasten the two latches.
6. Reconnect the electrical supply.
Fig. 11
