Greenheck ERV Series Installation, Operation And Maintenance Manual page 26

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.
To access these filters,
remove bottom bolt in the
access door on the side of the
weatherhood. Slide the access
door up and then pull bottom
out to remove door. Then, slide
the filters out (see picture to
right).
Clean filters by rinsing with a
mild detergent in warm water.
Internal Filter Maintenance
The ERV units will typically be 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 ® .
26 Energy Recovery Ventilator
Outdoor air intake hood
mesh filter access
Pleated Filter Size and Quantities
Unit Size Size
ERV-10 16 x 25
ERV-20 16 x 20
ERV-45 16 x 25
ERV-90 16 x 25
ERV-120 20 x 25
All dimensions in inches
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
ERV-10, 20, and 45: Closed cell foam tape is
installed on the perimeter of the door. Inspect at least
annually to ensure that the seal is still intact.
ERV-90 & 120: Slip-on type vinyl
seal is installed on the perimeter of
the door openings. Inspect at least
annually to ensure that seal is still
pliable and intact.
Energy Recovery Wheel Maintenance
Annual inspection of the energy recovery wheel is
recommended. Units ventilating smoking lounges
and other non-clean air spaces should have energy
recovery wheel inspections more often based upon
need. Inspections for smoke ventilation applications
are recommended bimonthly to quarterly until a regular
schedule can be established.
Accessing the Energy Recovery Wheel in
Models ERV-10, 20, and 45
Disconnect power to the ERV. Remove access panel(s)
labeled "Energy Wheel Cassette Access".
Unplug the wheel drive
motor. The center
channel must be
removed to access the
energy wheel cassette.
Use a 5 ⁄ inch open or
64
closed wrench to remove
the three (3) fasteners
that hold the center
channel in place.
Pull the cassette halfway out as shown.
When service is complete, reattach the center channel
before putting access panels back in place.
Supply Exhaust
Qty. Qty.
1 1
2 2
3 3
7 7
6 6
Access to wheel through
outdoor air filter door
®