MIL-PRF-24775A(SH)
4.5.3.5 Group C test schedule. The schedule for Group C tests shall be performed in the following order:
a.
b.
Cooling coil leakage (see 4.5.3.2).
c.
Internal excited (self-excited) vibration (see 4.5.3.3).
d.
Environmental (externally excited) vibration (see 4.5.3.4).
4.6 Maintainability demonstration. The first production unit shall be examined after testing, and the capability
to maintain, disassemble, and repair the unit shall be demonstrated. The demonstration shall be conducted utilizing
the recommended tools and with other than expert mechanics. Evidence that maintainability of the fan-coil unit
cannot be accomplished by other than expert mechanics shall be cause for failure of the demonstration. The
maintainability demonstration shall include but not be limited to the following:
a.
Replacement of fan motor.
b.
Replacement of motor bearing.
c.
Removal of air filters for servicing and replacement.
d.
Replacement of cooling oil.
e.
Servicing of cooling oil.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or
order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these
personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging
requirements are maintained by the Inventory Control Point's packaging activities within the Military Service or
Defense Agency, or within the military service's system commands. Packaging data retrieval is available from the
managing Military Department's or 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. Fan-coil units specified herein are intended to be used as an alternative to built-up air
conditioning recirculation systems of a ship's heating, ventilating, and air conditioning (HVAC) system. They
provide heating, cooling, and air recirculation required to satisfy compartment environmental design conditions with
a savings in space and weight over built-up systems. They are standardized by size, performance, mounting designs,
and mounting and connecting dimensions.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a.
Title, number, and date of the specification.
b.
Size, type, class, grade, heater, and motor protection required (see 1.2).
c.
When first article is required (see 3.1).
d.
Whether nonmagnetic fan-coil units are required (see 3.2.3).
e.
Painting requirements (see 3.3).
f.
Repair parts required (see 3.6).
g.
Whether inlet and outlet grilles are required (see 3.11.7).
h.
Whether left-hand unit is required (see 3.11.12.1).
i.
Whether an electric heater is required and FW rating (see 3.11.13).
j.
Whether low voltage release is required (see 3.12.1).
k.
Shock requirement (see 3.13.1).
l.
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