Fan Wheel & Fasteners
Wheels require very little attention when moving clean
air. Occasionally oil and dust may accumulate on the
wheel causing imbalance. When this occurs, the wheel
and housing should be cleaned to assure smooth and
safe operation. Inspect fan impeller and housing for
fatigue, corrosion or wear.
Routinely check all fasteners, set screws and locking
collars on the fan, bearings, drive, motor base and
accessories for tightness. A proper maintenance
program will help preserve the performance and
reliability designed into the fan.
Bearings
Most bearings are permanently lubricated and require
no further lubrication under normal use. Normal use
being considered -20ºF to 120ºF and in a relatively clean
environment. Some bearings are relubricatable and will
need to be regreased depending on fan use. Check your
bearings for grease zerk fittings to find out what type
of bearing you have. If your fan is not being operated
under normal use, bearings should be checked monthly
for lubrication.
External Filter Maintenance
Aluminum mesh, 2-inch deep filters are located in the
supply weatherhood (if the weatherhood option was
purchased). Filters should be checked and cleaned
on a regular basis for best efficiency. The frequency of
cleaning depends upon the cleanliness of the incoming
air. These filters should be cleaned prior to start-up.
Clean filters by rinsing with a mild detergent in
warm water.
Outdoor Air Filters:
Access to the outdoor air filters
is through the door labeled as “Filter Access” on the
outdoor air side of the unit.
Exhaust Air Filters:
Access to the exhaust air filters
is through the door labeled as “Filter Access” on the
exhaust air side of the unit.
Refer to Access Door Descriptions section for additional
information on filter locations.
Door Seal Maintenance
Slip-on type seal is installed on the door. Inspect at least
annually to ensure that seal is still pliable and intact.
Pleated Filter Size and Quantities
Unit Size
Supply
Exhaust
Size
Qty
Supply
Exhaust
ERVe-20
20 x 20
2
20 x 20
2
ERVe-35
16 x 20
3
16 x 25
3
ERVe-45
20 x 25
3
20 x 25
3
ERVe-55
16 x 20
6
16 x 20
6
All dimensions in inches.
Internal Filter Maintenance
The ERVe units are always provided with 2-inch, pleated
filters in the outdoor air and exhaust airstreams. These
filters should be checked per a routine maintenance
schedule and replaced as necessary to ensure proper
airflow through the unit. See table for pleated filter size
and quantity for each unit. Replacement filters shall be
of same performance and quality as factory installed
filters. Filter type must be pleated design with integral
metal grid. Two acceptable filter replacements are
Aerostar Series 400 or Farr 30/30
®
.
Energy Recovery Ventilator
22
®
