User Guide

11
Vektor ERS-MD Energy Recovery Plenum Laboratory Exhaust
Routine Maintenance
CAUTION
Use caution when removing access panels or other
unit components, especially while standing on a
ladder or other potentially unsteady base. Access
panels and unit components can be heavy and
serious injury may occur.
Once the unit has been put into operation, a routine
maintenance program should be set up to preserve
reliability and performance. Items to be included in
this program are:
 • InternalFilter
Check for cleanliness. Replace if required.
 • DoorSeal
Check if intact and pliable.
 • CoilMaintenance
Check for cleanliness (coil and drain pan).
 • WinterizingCoils
Drain. Fill with antifreeze. Drain.
Coil Maintenance:
Cleaning
Coils should be kept clean to maintain maximum
performance. For operation at its highest efficiency,
the coil should be cleaned often during periods
of high cooling demand or when dirty conditions
prevail. Power should be disconnected and locked
out and motors should be covered to insure that no
moisture penetrates into the windings causing motor
failure if applicable. Remove large debris from the
coils and straighten fins before cleaning. Clean coils
with cold water and detergent or with one of the
commercially available chemical coil cleaners. Rinse
coils thoroughly after cleaning. For coils with fragile
fins or high fin density, foaming chemical sprays and
washes air 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. FINS ARE SHARP! Use caution
when working with coils.
Fin Straightening
Coil fins may have been bent during shipping or
servicing, and should be straightened to maintain
maximum heat transfer. Reduction of the effective
coil surface will correspondingly reduce coil capacity.
Always check fin appearance after any handling of the
coil and after any servicing is done near the coils. Fin
combs are sized according to number of fins per inch
of the coil. For relatively small bends that require only
minor repair, other tools may be used to evenly space
the fins. Be careful not to damage the coils.
Winterizing Coils
During any extended down time, all water should
be drained from the coil. The coil should then be
thoroughly flushed with a glycol solution to prevent
freeze damage.
Filters
Filters upstream of the coil should be checked
regularly for dirtiness and clogging. If the filters are
dirty, they should be replaced. It is important that the
coils stay clean to maintain maximum heat transfer
capability.
Drain Pan
Drain pans may contain moisture; therefore, algae and
other organisms will grow due to airborne spores and
bacteria. Scheduled cleaning is necessary to prevent
build-up from clogging the drain. Drain pans should
also be kept clean to prevent growth of bacteria and
the spread of disease.
CAUTION
Do not use acidic chemical coil cleaners. Do not use
alkaline chemical coil cleaners that, after mixing,
have a ph value greater than 8.5 without also using
an aluminum corrosion inhibitor in the cleaning
solution. Failure to follow these guidelines or the
manufacturer’s instructions for use of cleaning
chemicals could result in damage to the unit.
WARNING
Biological Hazard! All drain pans and coils should
be cleaned on a regular schedule by qualified
personnel to prevent the growth of bacteria.