MIL-PRF-23798D(SH)
b.
The fan-motor of each fan-coil assembly shall be tested at rated voltage and current to determine
whether the fan and motor will operate. Any fan-coil assembly in which the motor or the fan and
motor fails to operate, shall be rejected.
4.6.7 Leakage test. The cooling coil of each fan-coil assembly shall be tested at a hydrostatic or pneumatic
pressure of at least 300 lb/in2 gauge. When tested there shall be no cooling coil leakage in the fan-coil assembly.
4.6.8 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
assembly 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 (see 4.7):
a.
Replacement of fan bearing.
b.
Replacement of V-belts.
c.
Replacement of fan-motor.
d.
Replacement of motor bearing.
e.
Removal of air filters for servicing and replacement.
f.
Adjustment and locking of adjustable motor sheave.
g.
Replacement of cooling coil.
h.
Servicing of cooling coil.
4.7 Test schedule. The schedule for testing the fan-coil assembly shall be performed as shown in Table VIII.
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. The fan-coil assembly is intended for use in lieu of a fan room with built-up system on
board. It is designed for ready connection to a chilled water system, a drainage system, an air distribution system,
and a power source. The belt drive for the centrifugal fan is intended to permit selection of capacity to fit
application depending on the use or extent of ductwork required. The adjustable motor pulley is specified to permit
ready selection of fan speed to fit specific application. Type II fan-coil assemblies should be specified when no duct
sections are to be attached to the unit when it is placed in service. Type III fan-coil assemblies should be specified
when one or more duct sections are to be attached to the air inlet or to the air outlet of the fan-coil assembly when it
is placed in service.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a.
Title, number, and date of the specification.
b.
Type, size, and capacity required (see 1.2).
c.
When first article is required (see 3.1).
d.
Whether nonmagnetic fan-coil assemblies are required (see 3.2.5).
e.
Air filters removable from other side than front of the cabinet (see 3.11.3).
f.
Fan pressure requirement, if other than specified (see 3.11.6).
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