AAF International Front Access Housings - Manual (Page 15)

6.1.3 Condensation: Humid air combined with cold surfaces may
result in condensation of moisture and blinding of both the
particulate and gas phase filters. This moisture can also result in
mold growth and corrosion which may also impact the performance
of the filter system. If condensation is a recurring problem,
dehumidification or other tempering of the air may be required.
System insulation may also be necessary. If the source of the
moisture is at the intake, weather hoods or weather louvers to
remove sensible moisture in the form of rain should be considered.
If the source of moisture is from leaking ducts repair the leaks.
6.1.4 Freezing: On air intake systems the presence of moisture in
the filters when caused by or combined with condensation, rain, snow,
sleet, or ice, and when subjected to freezing temperatures, can cause
the filters to freeze and become impassible. In such cases provide
intake protection systems to remove the cause of the problem.
6.2 Visible Discharge of Particulate:
6.2.1 Check for missing or damaged filters and system leaks.
Replace filters and re-seal as necessary.
6.2.2 Provide higher efficiency filters on the downstream side (air
leaving side) of the system.
6.3 Odors and Smells:
6.3.1 Check the performance of the gas phase chemical filters. If
the filters are no longer effective replace them.
6.3.2 Check for missing or damaged filters and system leaks.
Replace filters and re-seal as necessary.
7.0 Spare Parts List
It is recommended that the following spare parts be stored at the installation site for routine maintenance purposes. The quantities required will
depend on the size of the system. Consult with your AAF representative to determine actual quantities required. Minimum recommended
quantities are provided in the table below.
AAF Part Number Description Recommended Spares
Refer to the original customer purchase SAAF cassette gas phase chemical filters One full replacement set of each type
order and the AAF submittal drawing. included in the system.
Refer to the original customer purchase Particulate filters One full replacement set of each type
order and the AAF submittal drawing included in the system.
114-3026184-1 (A) Cassette sealing and locking channel 10% of total quantity or a minimum of 5
114-3026192 (B) Filter seal locking handle 10% of total quantity or a minimum of 5
5241070 Locking handle support tab 10% of total quantity or a minimum of 5
5241062 Locking handle support tab 10% of total quantity or a minimum of 5
2500866 (A) Face gasket One full replacement set or a roll of 50 feet
114-3026184-2 (A) Cassette sealing and locking channel for 10% of total quantity or a minimum of 3
1’ high half size housings only
To order replacement parts call: 1-800-477-1214.
8.0 Equipment Characteristics, Dimensions,
Operating Weights, and Shipping Weights
See the AAF submittal drawing supplied on the specific order.
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