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Model ERCH-HP Energy Recovery Unit
Internal Filter Maintenance
The unit will typically be provided with 2-inch, pleated
filters in the supply airstream. These filters should
be checked per a routine maintenance schedule
and replaced as necessary to ensure proper airflow
through the 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 Aerostat 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
access side of the unit.
Refer to Subassemblies/Filters section for additional
information on filter locations.
Coil Maintenance
Coils must be cleaned to obtain maximum performance.
Check once a year under normal operating conditions
and if dirty, brush or vacuum clean. Soiled fins reduce
the capacity of the coil, demand more energy from the
fan, and create an environment for odor and bacteria to
grow and spread through the conditioned zone. High
pressure water (700 psi or less) may be used to clean
coils with fin thickness over 0.0095 inches thick. TEST
THE SPRAY PRESSURE over a small corner of the coil
to determine if the fins will withstand the spray pressure.
For coils with fragile fins or high fin density, foaming
chemical sprays and washes are available. Many coil
cleaners contain harsh chemicals, so they must be used
with caution by qualified personnel only. Care must be
taken not to damage the coils, including the fins, while
cleaning. Caution: Fin edges are sharp.
Drain pans in any air conditioning unit will have some
moisture in them, therefore, algae and other organisms
will grow due to airborne spores and bacteria. Periodic
cleaning is necessary to prevent this buildup from
plugging the drain and causing the drain pan to
overflow. Inspect twice a year to avoid the possibility
of overflow. Also, drain pans should be kept clean to
prevent the spread of disease. Cleaning should be
performed by qualified personnel.
WARNING
REFER TO GENERAL SAFETY INFORMATION
Do not operate make-up air ventilator without the
filters and birdscreens installed. They prevent the entry
of foreign objects such as leaves, birds, etc.
Do not remove access panels or other unit
components while standing on a ladder or other
unsteady base. Access panels and unit components
are heavy and serious injury may occur.
WARNING
Biological hazard. May cause disease. Cleaning
should be performed by qualified personnel.
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 by rinsing with a mild
detergent in warm water prior to start-up.
Filters upstream of the coil should be checked
regularly. If the filters are dirty, they should be cleaned
or replaced. It is important that the coils stay clean to
maintain desired airflow.