ENVIRO-TEC
44
FORM ET115.24-NOM4 (819)
SECTION 3 - NORMAL OPERATION & PERIODIC MAINTENANCE
FILTERS, THROWAWAY
The type of throwaway filter most commonly used on
fan coil units should be replaced on a regular basis.
The time interval between each replacement should
be established based on regular inspection of the filter
and should be recorded in the log for each unit. Refer
to the product catalog for the recommended filter size
for each product type and size.
If the replacement fil-
ters are not purchased from the factory, the filters used
should be the same type and size as that furnished from
or recommended by the factory. Consult the factory for
applications using filter types other than the factory
standard or optional product. Dirty filters are the cause
of the most common system performance complaints.
It is essential that filters be serviced on a regular basis.
DRAIN
The drain should be checked before initial start-up and
at the beginning of each cooling season to assure that
the drain trap and line are clear. If it is clogged, steps
should be taken to clear the debris so that condensate
will flow easily.
Periodic checks of the drain should be made during
the cooling season to maintain a free flowing conden-
sate. Should the growth of algae and/or bacteria be a
concern, consult an air conditioning and refrigeration
supply organization familiar with local conditions for
chemicals available to control these agents. The drain
trap is a flexible rubber hose. It is secured to the drain
pan and riser with clamps and is easily removable for
service.
OPTIONAL REMOVABLE DRAIN PAN
An optional removable drain pan is available for easy
service and cleaning (see
Figure 32 on page 44
). To
remove the pan, disconnect the drain p-trap by loosen-
ing the hose clamp under the pan. Remove the retainer
plate at the front of the pan and slide the pan out of
its track. Clean or service pan as appropriate. Rein-
stall pan in reverse sequence. Retainer plate must be
installed for proper operation.
FIGURE 32 -
DRAIN PAN REMOVAL
REPLACEMENT PARTS
Factory replacement parts should be used wherever
possible to maintain the unit performance and operat-
ing characteristics and the testing agency listings. Re-
placement parts may be purchased through the local
Sales Representative.
Contact the local Sales Representative or the factory
before attempting any unit modifications. Any modi-
fications not authorized by the factory could result in
personnel injury and damage to the unit and could void
all factory warranties.
When ordering parts, the following information must
be supplied to ensure proper part identification:
1. Complete unit model number.
2. Unit hand connection (right or left hand) while
facing into the air stream.
3. Complete part description including any numbers.
On warranty replacements, in addition to the infor-
mation previously listed, the Factory Order Number
(CO#) that appears on the unit nameplate, is required.
Contact the factory for authorization to return any parts
such as defective parts replaced in warranty. All ship-
ments returned to the factory MUST be marked with
a Return Authorization Number, which is provided by
the factory.
All equipment and components sold through the Parts
Department are warranted under the same conditions
as the standard manufacturers’ warranty with the ex-
ception that the warranty period is 12 months unless
the component is furnished as warranty replacement.
Parts furnished as warranty replacements are warranted
for the remaining term of the original unit warranties.
LD13880
Summary of Contents for VHA
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