1107.2.3 Refrigerant piping penetrations.
MC § 1107.2.3
Refrigerant piping shall not penetrate floors, ceilings or roofs. Exceptions: 1. Penetrations connecting the basement and the first floor.
2.Penetrations connecting the top floor and a machinery penthouse or roof installation.
3.Penetrations connecting adjacent floors served by the refrigeration system.
4.Penetrations by piping in a direct system where the refrigerant quantity does not exceed Table 1103.1 for the smallest occupied space through which the piping passes.
5.Penetrations by piping in a direct system complying with Section 1107.2.3.1.
6.In other than industrial occupancies and where the refrigerant quantity exceeds Table 1103.1 for the smallest space, penetrations for piping that connects separate pieces of equipment that are either: 6.1. Enclosed by an approved gas-tight, fire- resistive duct or shaft with openings to those floors served by the refrigeration system or 6.2. Located on the exterior of the building where vented to the outdoors or to the space served by the system and not used as an air shaft, closed court or similar space.
