606.11.3 Ammonia refrigerant.
FC § 606.11.3
Systems containing more than 6.6 pounds (3 kg) of ammonia refrigerant shall discharge vapor to the atmosphere in accordance with one of the following methods: 1. Through an approved treatment system in accordance with FC 606.11.4; 2. Through a flaring system in accordance with FC 606.11.5; 3. Through an approved ammonia diffusion system in accordance with FC 606.11.6; 4. Directly to the atmosphere, when the commissioner determines, on review of an engineering analysis prepared in accordance with FC 104.7.2, that a fire, health or environmental hazard would not result from the atmospheric discharge of ammonia; or 5. By other approved means. Exception: Ammonia/water absorption systems containing less than 22 pounds (10 kg) of ammonia and for which the ammonia circuit is located entirely outdoors.
