Drying apparatus shall comply with the applicable chapters of this Code and with the special requirements of this section:
(a) Spray booths, spray areas, spray rooms used for spraying operations shall not alternately be used for the purpose of drying by any arrangement which will cause an increase in the surface temperature of the spray booth, spray area, spray room used for spraying operations, except as hereinafter permitted.
(b) Except as specifically provided in Section 15-24-860(c) drying or baking units utilizing a heating system having open flames or which may produce sparks shall not be permitted in any spray booth, spray area, spray room but may be installed adjacent thereto if equipped with an interlocked ventilating system arranged to:
1. Thoroughly ventilate the drying space before the heating system can be started;
2. Maintain a safe atmosphere at any source of ignition;
3. Automatically shut down the heating system in the event of failure of the ventilating system.
(c) Motor vehicles refinishing booths or enclosures, otherwise installed and maintained in conformity with this section, may alternately be used for drying with portable infrared drying apparatus when complying with the following:
1. The procedure shall be restricted to occasional operations using less than ten gallons in any 24-hour period of liquids as defined for paint spraying in Section 15-24-550 of this Code.
2. The interior of spray enclosures shall be kept free of overspray deposits.
3. During the spray operations, the drying apparatus and electrical connections and wiring thereto shall not be located within the spray enclosure nor in any other location where spray residue may be deposited thereon.
4. Spraying apparatus, drying apparatus and ventilating system of the spray enclosure shall be equipped with suitable interlocks so arranged that:
(a) Spraying apparatus cannot be operated while drying apparatus is inside the spray enclosure;
(b) Spray enclosure will be purged of spray vapors for a period of not less than three minutes before drying apparatus can be energized;
(c) The ventilating system will maintain a safe atmosphere within the enclosure during the drying process and the drying apparatus will automatically shut off in the event of failure of the ventilating system.
5. All electrical wiring and equipment of the drying apparatus shall conform to Title 14E. Only equipment of a type approved for Class I, Division 2 hazardous locations, as defined in Section 14E-5-500, shall be located within 18 inches of the floor level. All metallic parts of the drying apparatus shall be properly electrically bonded and grounded.
(Prior code § 129.1-77; Amend Coun. J. 9-6-17, p. 55278, Art. II, § 59)