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Cleanable filters
Cleanable filters should be
inspected and cleaned on a
regular basis, similar to the
maintenance schedule used
for throwaway filters. The time
interval between cleaning is
dependent upon the environment
in which the unit is operating and
should be established based
upon regular inspection of the
filter. Record the time interval in
the maintenance log for future
reference. Unlike throwaway
filters, cleanable filters may be
cleaned and reinstalled in the
unit instead of being disposed
of when dirty. The cleanable
filters may be washed in hot,
soapy water and then set aside
to dry before recharging and
reinstalling.
Before replacing the filter, it
should be recharged with some
type of entrapment film such as
“Film-Car Recharging Oil.” The
filter should be sprayed on both
sides or submerged in the film to
assure complete coverage. The
filter should not be soaked in the film
but should be quickly dunked and
removed, allowing the excess to drain
off the surface before reinstalling in
the unit.
Note: cleanable filters tend to
have less air pressure drop than
throwaway filters.
Drain
The drain pan and drain should be
checked during initial start-up and
at the beginning of each cooling
season to ensure that the pan, drain,
trap and line are all clear. If clogged,
steps should be taken to clear
the debris to allow proper flow of
condensate.
Replacement parts
Factory replacement parts
should be used wherever
possible to maintain unit
performance, it’s normal
operating characteristics and its
safety testing agency listings.
Replacement parts may
be purchased through the
local Zehnder Rittling Sales
Representative.
Failure to do this may result in
significant property damage and
void the manufacturer’s warranty.
The manufacturer will not be
responsible for any consequential
damages due to water.
Periodic checks of the drain
should be made during the
cooling season to maintain a
free-flowing condensate.
Should the growth of algae
and/or bacteria be a concern,
consult an air-conditioning and
refrigeration supply company
familiar with local conditions
for chemicals or other solutions
available to control these
substances.
Contact the local Sales
Representative or factory before
attempting any unit modifications.
Any modifications not authorized by
the factory could result in personnel
injury, damage to the unit, and will
void the manufacturer’s warranty.
When ordering parts, the following
information should be supplied to
ensure proper part identification:
n
Complete unit model number
n
Unit serial number
n
Complete part description
including any identifying numbers
on the part
On warranty replacements, it
is often necessary to return the
faulty component to receive
credit. Contact the local Sales
Representative who will get
authorization from the factory
including an RGA (Returned
Goods Authorization) to be used
when sending components back
for inspection. Any returned
components sent back to the
factory without the proper
RGA attached will cancel any
outstanding credit.
