1104.2.2 Industrial occupancies and refrigerated rooms.
MC § 1104.2.2
This section applies only to industrial occupancies and refrigerated rooms for manufacturing, food and beverage preparation, meat cutting, other processes and storage. Machinery rooms are not required where all of the following conditions are met: 1. The space containing the machinery is separated from other occupancies by tight construction with tight-fitting doors.
2.Access is restricted to authorized personnel.
3.The floor area per occupant is not less than 100 square feet (9.3 m 2 ). Where provided with egress directly to the outdoors or into building exits meeting the requirements of the New York City Building Code, the minimum floor area shall not apply.
4.Refrigerant detectors are installed as required for machinery rooms in accordance with Section 1105.3.
5.Surfaces having temperatures exceeding 800°F (426.7°C) and open flames are not present where any Group A2, B2, A3 or B3 refrigerant is used (see Section 1104.3.3). Nothing in this section shall be construed to allow the use of Group A3 and B3 refrigerants if otherwise prohibited.
6.All electrical equipment and appliances conform to Class 1, Division 2, hazardous location classification requirements of the New York City Electrical Code where the quantity of any Group A2, B2, A3 or B3 refrigerant, other than ammonia, in a single independent circuit would exceed 25 percent of the lower flammability limit (LFL) upon release to the space based on the volume determined by Section 1104.4. Nothing in this section shall be construed to allow the use of Group A3 and B3 refrigerants if otherwise prohibited.
7.All refrigerant-containing parts in systems exceeding 100 hp (74.6 kW) drive power, except evaporators used for refrigeration or dehumidification; condensers used for heating; control and pressure relief valves for either; and connecting piping, shall be located either outdoors or in a machinery room.
