HFD-135 OM English.qxd
INSTALLING THE FILTERS
Please make certain that the unit is OFF and unplugged.
To install the IFD
Filter and pre-filter:
• Insert the pre-filter into the basket first.
• Place the IFD
filter on top of the pre-filter, making certain that the
insert arrows match up with the label outside the basket (Fig. 16).
• Slide the filter basket onto the swing arm and gently push the filter
basket into the air purifier until it clicks into place.
• Replace the rear panel door by lining up the tabs on the
bottom portion of the door with the notches on the air
purifier and then turning the locking knob clockwise
• Turn the locking knob clockwise to lock in place
NOTE: This unit is equipped with a safety interlock. The
unit will not operate while the Rear Door is removed.
CLEANING AND MAINTENANCE
• Use a clean, dry cloth to wipe the external surfaces of the air purifier. DO NOT USE WATER, GASOLINE,
POLISH, OR ANY CHEMICAL SOLUTION.
• The IFD
filter and pre-filter should be cleaned at least once a month, or sooner depending on the air
quality of the room (See "Removing/Cleaning the IFD
FREQUENTLY ASKED QUESTIONS
How often is cleaning required?
filter reset light will illuminate to indicate that the IFD
recommend cleaning the filter about once a month depending on the air quality of the room.
I just cleaned my filter but the filter indicator bar is still showing it is dirty, what's wrong?
Each time you clean your filter you must reset the filter life indicator. It is a timer driven indicator to be
used as a guideline, but does not represent the actual amount of dirt in the IFD
the appropriate button for up to 10 seconds and when you let go, the filter indicator bar should be
The filter indicator bar on my unit is completely full but my filter doesn't really look dirty.
The filter indicator on your unit is timer-based and does not measure the amount of particles in the
filter. It is possible that your filter indicator could indicate that the filter is dirty but some particles
are so small that they cannot be seen but are present in the filter. We recommend cleaning the IFD
filter (see Removing/Cleaning the IFD
Filter" or "Cleaning the Pre-Filter" respectively).
Filter in the manual).
filter should be cleaned. We
filter. Press and hold