MIL-PRF-23798D(SH)
3.2.6 Motor material. Motor material shall conform to the requirements of IEEE STD 45 or NEMA MG 1, as
applicable, for nonmagnetic motors.
3.2.7 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the
operational and maintenance requirements, and promotes economically advantageous life cycle costs.
3.3 Painting. The color of the fan-coil assembly shall be Light Gray, Navy Formula 111 of MIL-DTL-15090.
3.4 Welding and allied processes. Surfaces of parts to be welded or brazed shall be free from rust, scale, paint,
grease, and other foreign matter. Welding and allied processes shall be performed by personnel certified to AWS
B2.1 and B2.2. NAVSEA Technical Publication S9074-AR-GIB-010/278 shall be used for guidance.
3.5 Identification plates. Each fan-coil shall be provided with a permanently attached corrosion-resistant
identification plate. Method of attachment of the identification plate shall be corrosion-resistant. The plate shall
contain the following information:
a.
National stock number (NSN)
b.
Manufacturer's name, commercial and government entity (CAGE), and part number
c.
PIN code
d.
Contract or order number
3.6 Interchangeability. In no case shall parts be physically interchangeable or reversible unless such parts are
also interchangeable or reversible with regard to function, performance, and strength.
3.7 Operating life. The equipment shall have an operating life of 175,000 hours (continuously) except for
replaceable parts such as bearings and V-belts. Replaceable parts other than the V-belts shall provide continuous
operation for 35,000 hours before replacement is necessary. V-belts shall provide continuous operation for not less
than 17,000 hours before replacement is necessary.
3.8 Workmanship. The fan-coil assembly shall be free from defects that affect appearance and operation. The
tube sheets of the cooling coil shall not crack due to punching or forming, and fin collars shall not crack when
forming tubes into collars. Fin edges of the cooling coil shall be free of burrs and shall not be bent. Sharp edges,
burrs, and other imperfections shall be removed from all parts subject to contact with personnel to prevent cuts
during repair and maintenance. Cabinet corners shall be square and fasteners shall be in place and secured.
3.9 Human engineering. The fan-coil assembly shall be arranged so as to achieve safe, reliable, and effective
performance by the operator and maintenance personnel and to optimize personnel skill requirements. ASTM F1166
shall be utilized as a guideline in applying human engineering design criteria for the fan-motor unit.
3.10 Maintainability. The fan-coil assembly shall be constructed so that (see 4.6.8):
a.
Fan and motor are removable.
b.
V-belt is removable and replaceable.
c.
Fan bearings and motor bearings are removable and replaceable.
d.
Air filter is removable and replaceable.
e.
Belt tension and sheave diameter are adjustable.
f.
Cooling coil is removable.
g.
All the above, except removal of air filter, shall be accomplished by using commonly available tools
and without removal of attached ducting, disassembly of the fan-coil assembly, or removal from
foundation. Quick acting fasteners requiring no tools shall be used for removal of air filter.
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