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.

1101.9 Refrigerant discharge.

Notification of refrigerant discharge shall be provided in accordance with the New York City Fire Code.

1101.10 Gas and oil fired absorption systems.

Refrigeration systems 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.