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Coils
Coils must be cleaned to maintain maximum
performance. Check coils once per 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.
WARNING
Biological hazard. May cause disease. Cleaning
should be performed by qualified personnel only.
For coils with fragile fins or high fin density, foaming
chemical sprays and washes are available. 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.
Winterizing Coils
Coil freeze-up can be caused by such things as air
stratification and failure of outdoor air dampers and/
or preheat coils. Routine draining of water cooling coils
for winter shutdown cannot be depended upon as
insurance against freeze-up. Severe coil damage may
result. It is recommended that all coils be drained as
thoroughly as possible and then treated in the following
manner.
Fill each coil independently with an antifreeze solution
using a small circulating pump and again thoroughly
drain. Check freezing point of antifreeze before
proceeding to next coil. Due to a small amount of water
always remaining in each coil, there will be diluting
effect. The small amount of antifreeze solution remaining
in the coil must always be concentrated enough to
prevent freeze-up.
WARNING
Carefully read instructions for mixing antifreeze
solution used. Some products will have a higher
freezing point in their natural state than when mixed
with water.
24
Model APEX Energy Recovery Ventilator
Door Seals
Slip-on type vinyl seal is installed on the perimeter of
the door openings. Seal should be inspected at least
annually to ensure that seal is still pliable and intact.
®
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