24
Model PV
e
Heat Recovery Unit
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.
Internal Filter Maintenance
The PVe 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
®
.
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.
Filter Size and Quantities
Unit Size
Pleated Filter Size
Quantity
Supply and Exhaust
Supply
Exhaust
PVe-20
12 x 25 x 2
3
3
PVe-35
16 x 25 x 2
3
3
PVe-45
20 x 25 x 2
3
3
PVe-55
24 x 24 x 2
3
3
All dimensions in inches.
