4  SPECIFIC PRINCIPLES TO COVER EXCEPTIONS AND ADDITIONS TO THE DESIGN, CONSTRUCTION AND CLEANING OF ALL BAKERY EQUIPMENT, AS DEFINED IN SECTION 3.

4.10  DESIGN REQUIREMENTS FOR PREFABRICATED ENCLOSURES AND AIR CONDITIONING EQUIPMENT FOR FERMENTATION, PROOFING, COOLING AND RETARDING

4.10.1 Definitions

4.10.1.1 Air Conditioning: The process of treating air to control its temperature, humidity, cleanliness and distribution to meet the requirements of the conditioned space.

4.10.2 Specific Design Requirements

4.10.2.1 All internal and external framework, bumpers, guides, tracks or supports resting on floors or attached to ceiling or walls shall be sealed at the point of contact, and supports and braces, if hollow, shall be sealed.

4.10.2.2 External hinges, attachment mechanisms and latches for holding inspection doors, port covers, access doors and other detachable parts shall be accessible.

4.10.2.3 The interior surfaces of air conditioning unit housing and exterior of parts therein shall be accessible for cleaning.

4.10.2.4 Fans shall be accessible.

4.10.2.5 Complete drainage shall be provided for water reservoirs and points where water may collect.

4.10.2.6 All air mechanically introduced into the air conditioning space shall be properly filtered or washed to remove particles 50 microns or larger, and shall not contain oil, water and other liquids unless specifically required as an operational procedure.

4.10.2.7 Ducts shall be provided with openings or removable sections so located and installed that they will permit visual inspection and cleaning.

4.10.2.8 Joints occurring where walls, ceiling or floor surfaces form one or more sides of a duct shall be sealed, or the duct shall be removable. Wall and ceiling panels need to be sealed only on the inside joint.

4.10.2.9 Ducts shall be constructed and assembled so that the joints are sealed, or the sections are removable.

4.10.2.10 Ducts, wherein water may accumulate, shall be pitched to provide complete drainage, and arranged so that water shall not leak or drip onto the product.

4.10.2.11 Rectangular ducts which are not removable, but adjacent to a fixed surface, shall either be sealed thereto, or the duct shall be spaced away from the fixed surfaces a distance equal to one-fifth (1/5) of the minimum dimension of the surface parallel and adjacent to the fixed surface, except that such distance shall not be less than 2 inches (50mm).

4.10.2.12 Round ducts shall be spaced from fixed surfaces so that duct and adjacent surfaces shall be readily accessible.

4.10.2.13 Enclosures for automatic conveyor-type proofers and coolers shall provide space for washing and cleaning equipment where such washing or cleaning equipment is not provided external to the enclosure. Enclosures for equipment using readily removable fabric sleeves for product-carrying surfaces are exempt from this requirement.

4.10.2.14 Proofer humidifier heating coils shall be constructed of a non-corrosive material.