Owner’s Manual
Page - 10 - of 22
Filter image, Figure 4
NOTE: One 1” (25 mm) thick filter can be used in place of 2” (50 mm) filters but will need to be changed twice as often.
CAUTION: Do not substitute the recommended 2” (50mm) filter with two 1” (25 mm) filters, this will significantly reduce the
airflow through the unit. See Figure 4.
M30 Filter Changing Procedure:
Turn off fan toggle switch located at top left front face of unit and wait until the fan has come to a stop.
Remove the filter access cover on the front of the unit above the air inlet. Be careful not to over tighten the machine screws
that hold the cover in place.
Slide the top filter all the way to the top of the filter frame. It should hold itself in place with a small clip at the top and not
slide down. If it doesn’t then use a small piece of tape to hold it in place. If the top filter doesn’t hold in the up position
there is not enough room to hold it in place with your hand and still get the lower filter out.
Slide the bottom filter up and pull the top towards the fan and out of the unit.
Slide the top filter down and remove it just as the lower filter was removed.
Reverse this process to re-install the filters.
Re-install the filter access cover.
Turn the fan control switch on.
M50A Filter Changing Procedure:
Remove the filter access cover on the front of the unit above the air inlet. A magnetic door switch on the access cover will
shut the fan down automatically.
Slide the top filter all the way to the top of the filter frame. Pull the bottom of the filter towards the fan and drop the filter
until the top of the filter clears the M50 cabinet. Lift the filter out of the unit.
The middle and bottom filters can now be lifted up and out of the filter frame.
Reverse this process to re-install the filters.
Re-install the filter access cover and the fan will turn on if there is a cool call.
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