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 TM 55-1905-220-14-8
4-30. COMPRESSOR - HVAC - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
SERVICE (Cont)
NOTE
* To keep dirt out of the compressor during initial operation of a
new system, a hard wool felt filter is installed inside the regular
bronze screen strainer provided in the compressor suction
manifold.
* The felt filter is intended for use only during initial operation to
trap any fine particles of dirt which may enter the system during
installation. This filter, is supplied with all new compressors.
The arrangement of the filter within the suction strainer is shown
below. To install the temporary felt filter proceed as follows:
1. Remove suction strainer.
2. Insert ends of bail into holes of retaining band.
3. Insert retaining band and bail into felt filter so that bail is at
right angles to filter seam and approximately 1/16 inch (.159
cm) of felt extends beyond edge of band. Work ends of bail
through the felt.
4. Insert filter assembly into suction strainer of compressor with
the seam out. Be sure filter does not extend beyond edge of
strainer.
5. Attach warning tag to suction valve as a reminder that a felt
sock is installed.
* Remove the filter after 50 hours of operation. If the filter is
reasonably clean it may be left out. Otherwise clean and
replace it for another 50 hours.
4-918
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