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Maintenance
associated with these types of
filters, negatively affecting unit
performance.
Cleanable filters
These types of 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 set established
based on 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 of the
surface before reinstalling in the unit.
It should be noted that 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
securely connected and clear. If
clogged, steps should be taken to
clear the foreign debris to allow
proper flow of condensate. Failure
to strictly follow this instruction, will
void the manufacturer’s warranty
and 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.
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.
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:
Complete unit model number
Unit serial number
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.
