MIL-PRF-44466D
4.3.4.2 Weight verification. Verify that the empty HWR does not exceed 20 pounds.
4.3.4.3 Maintainability verification. Demonstrate and verify that all components are accessible
for ease of installation, adjustment, maintenance, servicing and replacement without the removal
of any other component and that there is no requirement for special tools.
4.3.4.3.1 Alternative maintainability analysis. When a technical manual is furnished as part of
the contract, it shall be analyzed for proper service and maintenance procedures in lieu of the
demonstration specified in 4.3.4.3.
4.3.4.4 Electrical wiring inspection. Visually verify that all wiring is marked to allow
identification with the wiring diagram.
4.3.4.5 Marking inspection. Visually verify that all identification, instruction and control
plates are permanently attached to the outside of the heating unit, lettering is permanently
inscribed, legible and not less than 1/16 inch high, and plates have a nonreflective surface.
4.3.4.5.1 Identification plate inspection. Visually verify that all information is complete and
accurate.
4.3.4.5.2 Instruction plate inspection. Visually verify that all instructions are complete and
accurate and that the plate is located as indicated on figure 1.
4.3.4.6 Durability test. One half-gallon of water shall be placed into the HWR and the
temperature selection switch set to the "high" temperature setting. While operating, the HWR
shall be raised 12 inches from the floor and dropped onto a concrete surface 5 times. The HWR
shall continue to be operated for 2 hours. Verify the water temperature to be 1850F + 50F and
that no leakage or malfunction has occurred.
4.3.5 Environmental requirements verification. Complete each verification in section
4.3.5.
4.3.5.1 Ambient temperature (low) test The test procedures specified in 4.3.2.2 shall be
followed, except that the ambient air temperature shall be changed to -250F. Verify that T2-T1
> 1000F.
4.3.5.2 Ambient temperature (high) test. The test procedure specified in 4.3.2.2 shall be
followed, except that the ambient air temperature shall be changed to 1400F. Verify that T2-T1
> 1000F.
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