MIL-PRF-19004B
demonstration. The maintainability demonstration shall include but not be
limited to the following:
a.
Removal of fan impeller.
b.
Removal of motor.
c.
Removal of motor bearing.
4.11 Test schedule.
The schedule for testing the fan shall be performed in
the following order.
a.
Composite material (4.8).
b.
Balance (4.7.3).
c.
Casing tightness (4.7.8).
d.
Performance (4.7.4), stall and recovery (4.7.4.1), speed (4.7.9) and
heat (4.7.6). These tests shall be conducted concurrently.
e.
Airborne noise (4.7.5, 4.7.5.1, 4.7.5.2, 4.7.5.3, 4.7.5.4, 4.7.5.5).
f.
Vibration test (4.7.2). The correction of damage, which may have
occurred during the vibration test, shall not be performed prior to
test specified in 4.7.1.
g.
High-impact shock (4.7.1). After conducting the high-impact shock
test, tests specified in 4.7.4 and 4.7.4.1 shall be again conducted
without correction of damages that may have occurred during the
shock. Data for tests specified in 4.7.4 and 4.7.4.1, one before
and one after high-impact test, shall demonstrate that the fan-motor
unit satisfies performance and aerodynamic stall to within 5 percent
of the volume indicated on Figure 2.
h.
Explosion (4.7.7 and 4.7.7.1).
i.
Permeability (4.9).
j.
Maintainability (4.10).
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be
as specified in the contract or order (see 6.2). When actual packaging of
material is to be performed by DoD personnel, these personnel need to contact
the responsible packaging activity to ascertain requisite packaging
requirements. Packaging requirements are maintained by the Inventory Control
Point's packaging activity within the Military Department or Defense Agency,
or within the Military Department's System Command. Packaging data retrieval
is available from the managing Military Department's for Defense Agency's
automated packaging files, CD-ROM products, or by contacting the responsible
packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may
be helpful but is not mandatory.)
6.1 Intended use. The fan-motor units specified herein are intended for
ventilation and air conditioning applications only onboard ships and craft of
the United States Navy. The direction of airflow into and out of the fans is
radial. The fans are of non-sparking construction. Fans with motors rated
for 149 °F ambient temperature are standard.
6.2 Acquisition requirements.
Acquisition documents must specify the
following:
a.
Title, number, and date of this specification.
b.
Type required (see 1.2).
c.
Issue of DODISS to be cited in the solicitation and, if required,
the specific issue of individual documents referenced (see 2.3).
d.
Whether nonmagnetic fan-motor units are required (see 3.2.4).
e.
Fan characteristic code in accordance with 3.4.1 including size (see
3.11), discharge and rotation (see 3.13.3), type of motor current,
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