MIL-PRF-53047B
FEET FOR PROLONGED EXPOSURE" and shall be legible from the distance indicated on the
sign.
3.6 Interface.
3.6.1 Envelope dimensions and interface requirements. Restrictions for controls, connections
and interface, and the envelope dimensions for the water chiller shall be as shown in figure 1. No
component of the water chiller shall extend beyond the overall envelope defined, except as defined
in 3.3.2.3. No controls or connections to which access is required in shall be located on the rear
or top of the unit.
3.6.2 Mounting.
3.6.2.1 Water chiller unit. The water chiller unit shall securely interface with a mounting
cradle as shown in figure 1. The skid, or other provisions, shall be designed to ensure the correct
orientation of the assembled unit.
3.6.2.2 Cradle. When specified (see 6.2), a mounting cradle shall be provided as an ancillary
item to the water chiller. The cradle shall be as specified in figure 1. The cradle shall be provided
with all the installation hardware and accessories required to attach the water chiller unit, and to
mount the cradle.
3.6.3 Trailer interface. Assembled with its mounting cradle, and pads as necessary, the water
chiller shall interface with the following equipment:
a. Trailer, Tank: Potable Water, 400-Gallon, 2-Wheel, M149A2
3.6.3.1 Government-loaned property. When specified (see 6.2), access to the trailer shall be
made available to the contractor.
3.7 Sustainment.
3.7.1 Corrosion protection. The water chiller and its accessories shall be inherently corrosion
resistant or treated to provide protection against the various forms of corrosion and deterioration
to which they are susceptible.
3.7.1.1 Dissimilar metals. Dissimilar metals shall not be used in immediate contact with each
other unless protected against galvanic corrosion.
3.7.1.2 Identification of materials and finishes. The manufacturer shall identify the specific
material, material finish, or treatment for use with components and sub-components.
3.7.1.3 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. Used, rebuilt, or remanufactured components, pieces
and parts shall not be incorporated in the unit.
3.7.1.4 Conduit materials. Materials in contact with potable water shall conform to the Code
of Federal Regulations (CFR), 21, Part 177. All plastic materials that contact potable water shall
be tested or listed as being acceptable for contact with drinking water by the National Sanitation
Foundation under standards 14 and 51. When tested, in accordance with American Public Health
Association (APHA) standard method for the examination of water and waste water, part 211B,
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