18-28-1106.5 Pipe penetrations.

   All pipe penetrations of the interior walls, ceiling or floor of machinery rooms shall be sealed vapor tight and protected in accordance with the building code.

18-28-1106.6 Deliberately omitted.

18-28-1106.7 Egress.

   Each machinery room shall be provided with a minimum of one exit door that opens directly to the outside.

   Exception: Self-closing, tight fitting doors opening into a protected exit connecting to an outside exit as required by the building code.

18-28-1106.8 Ammonia room ventilation.

   Ventilation systems in ammonia machinery rooms shall be operated continuously. In machinery rooms containing refrigeration equipment using Group 2 refrigerants, the inlet to the exhaust fan or fans, or air-duct connection, shall be located near the ceiling, and the outlet from the fan or fans, or air-duct connection, shall terminate outside the building above the roof of the highest story of the building, and shall be at least 30 feet (9.144m) from any penthouse, skylight, or ventilation air-intake.

18-28-1106.9 Flammable refrigerants.

   Where refrigerants of Groups A2, A3, B2 and B3 are used, the machinery room shall conform to the Class I, Division 2, hazardous location classification requirements of NFPA 70.

   Exception: Ammonia machinery rooms.