1101.2 Factory-built equipment and appliances.

Listed and labeled self-contained, factory-built equipment and appliances shall be tested in accordance with UL 207, 412, 471 or 1995. Such equipment and appliances are deemed to meet the design, manufacture and factory test requirements of this code if installed in accordance with their listing and the manufacturer's instructions.

1101.3 Protection.

Any portion of a refrigeration system that is subject to physical damage shall be protected in an approved manner.

1101.4 Water connection.

Water supply and discharge connections associated with refrigeration systems shall be made in accordance with this code and the New York City Plumbing Code.

1101.5 Fuel-oil and fuel-gas connection.

Refrigeration system devices, equipment and appliances utilizing fuel oil or fuel gas for combustion shall be installed in accordance with the applicable provisions of the New York City Fuel Gas Code and this code.

1101.6 General.

Refrigeration systems shall comply with the requirements of this code and, except as modified by this code, ASHRAE 15. Ammonia-refrigerating systems shall comply with this code and, except as modified by this code, ASHRAE 15 and IIAR 2. Such systems shall be maintained in accordance with the New York City Fire Code.

1101.7 Maintenance.

Mechanical refrigeration systems shall be maintained in proper operating condition, free from accumulations of oil, dirt, waste, excessive corrosion, other debris and leaks.

1101.8 Change in refrigerant type.

The type of refrigerant in refrigeration systems having a refrigerant circuit containing more than 220 pounds (99.8 kg) of Group A1 or 30 pounds (13.6 kg) of any other group refrigerant shall not be changed without prior notification to the commissioner and compliance with the applicable code provisions for the new refrigerant type. The refrigerant being considered shall be evaluated for suitability by an engineer. Whenever change in the type of refrigerant is to be done, consideration shall be given to the following:

   1.   The effects of the substitute refrigerant on materials in the system;

   2.   The possibility of overloading the liquid receiver, which shall not be more than 80 percent full of liquid;

   3.   The possibility of exceeding motor rating, design working pressure, or other requirements that would violate any of the provisions of this code;

   4.   The proper size of refrigerant controls;

   5.   The effect of the operation and setting of safety devices;

   6.   The possible hazards created by mixture of the original and the substituted refrigerant; and

   7.   The effect of the classification of the refrigerant as provided.