Honeywell ER90 Owner's Manual page 9

Fresh Air Filter: Replace the fresh air filter at least twice a year. To
remove filter:
1. Unscrew access panel thumbscrews to remove the filter access
panel. See Figs. 3 and 4.
2. Slide the fresh air filter out of the Home Ventilation System.
3. Check filter and replace if clogged.
4. Place the filter access panel back on the Home Ventilation
System and tighten the thumbscrews.
Fig. 4—ER200 fresh air filter location.
FRESH
AIR FILTER
Weather Caps: Check to ensure that the outside fresh air inlet and
exhaust weather caps do not become clogged with debris like
grass, leaves and snow.
Energy Transfer Wheel: Check the energy transfer wheel for build-up
of dirt and debris.
NOTE: Energy transfer is not affected by stained surfaces.
To remove and clean the ER90/100s Energy Transfer Wheel:
1. Unscrew the screws holding the Home Ventilation System cover
and remove the cover. See Fig. 5.
2. Take out the center divider.
3. Loosen the screw in the center of the wheel hub cap.
4. Rotate hub cap counterclockwise and remove.
5. Grasp hub with two fingers and take straight off the drive shaft.
IMPORTANT: Lift only by the hub.
THUMB-
SCREWS
M3323
7 69-0737B—1