Customer Cabinet Provisions - Structural Concepts Impulse Series Installation & Operating Manual

CUSTOMER CABINET PROVISIONS

Customer Cabinet Provisions

Customer provided cabinet must adhere to the minimum requirements in ANSI/UL Std. 471 and ANSI/
NSF Std. 7.

Among the factors that are to be taken into consideration when judging the acceptability of a cabinet or
similar enclosure are mechanical strength, resistance to impact, moisture-absorptive properties, flame
resistance, resistance to distortion at temperatures to which the material may be subjected under
conditions of use, and resistance to corrosion.

Customer provided cabinet or similar enclosure shall have the strength and rigidity necessary to resist
conditions of intended use without increasing the risk of fire or injury to persons due to total or partial
collapse. Cabinet or similar enclosure must be strong enough to hold weight of cabinet and intended
product load. Dry weight (no product in case) exceeds 500 pounds.

A nonmetallic cabinet or similar enclosure (or part of an enclosure) shall have a flame spread index of not
more than 200 when tested in accordance with the Standard for Tests for Surface Burning
Characteristics of Building Materials, UL 723.

The cabinet or similar enclosure shall be constructed and assembled to reduce the risk of fire due to the
emission of molten metal, burning insulation, flaming particles, or the like, through openings onto
flammable material, including the surface over which the refrigeration is mounted.

A sheet metal cabinet or similar enclosure is to be judged for acceptability with respect to its
size, shape, metal thickness. Sheet metal such as galvanized or stainless shall be 0.30 inch
(22 gage) or greater.

Steel enclosures shall be protected against corrosion by metallic or nonmetallic coatings, such
as plating or painting.
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The refrigeration access panel/door shall be arranged so that main power switch, refrigeration controller
and refrigeration package are accessible without removing parts other than access panel/door.

A hinged or pivoted panel shall be positioned or arranged so that when it is in an open position
falling or swinging due to gravity or vibration will not cause injury to persons.

For electrical protection when installed in its intended manner, louvers and other openings in the
enclosure shall be constructed and located to reduce the risk of unintentional contact with moving, live or
hot parts such as fan blades and condensate trays. The minor dimension of such openings shall not
exceed 3 inches—See Table 6.1 for Clearance from Openings. Tools are required to remove covers,
panels or grilles unless interlock is provided.

Ventilation openings/louvers shall be free of sharp edges and burrs and have spaces large enough to
allow for easy cleaning. Louvers that may be subject to splashes, spills, and overhead drips shall be of a
drip-deflecting design.
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