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// CODE SNIPPET

1107.2 Piping Location

2020 Mechanical Code of NYS > 11 Refrigeration > 1107 Refrigerant Piping > 1107.2 Piping Location
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Refrigerant piping that crosses an open space that affords passageway in any building shall be not less than 7 feet 3 inches (2210 mm) above the floor unless the piping is located against the ceiling of such space. Refrigerant piping shall not be placed in any of the following:

  1. A fire-resistance-rated exit access corridor.
  2. An interior exit stairway.
  3. An interior exit ramp.
  4. An exit passageway.
  5. An elevator, dumbwaiter or other shaft containing a moving object.
  6. A shaft that has one or more openings into a fire-resistance-rated exit access corridor, interior exit stairway or ramp or exit passageway.

1107.2.1 Piping in Concrete Floors

Refrigerant piping installed in concrete floors shall be encased in pipe ducts. The piping shall be isolated and supported to prevent damaging vibration, stress and corrosion.

1107.2.2 Refrigerant Penetrations

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. 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:

    1. 5.1. Enclosed by an approved gas-tight, fire-resistive duct or shaft with openings to those floors served by the refrigeration system.
    2. 5.2. 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.

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