1104.3 Refrigerant Restrictions
Group A2 and B2 refrigerants shall not be used in high-probability systems where the quantity of refrigerant in any independent refrigerant circuit exceeds the amount shown in Table 1104.3.2. Group A3 and B3 refrigerants shall not be used except where approved.
Exception: This section does not apply to laboratories where the floor area per occupant is not less than 100 square feet (9.3 m2).
MAXIMUM PERMISSIBLE QUANTITIES OF REFRIGERANTS
|TYPE OF REFRIGERATION SYSTEM||MAXIMUM POUNDS FOR VARIOUS OCCUPANCIES|
|Institutional||Assembly||Residential||All other occupancies|
|Sealed absorption system|
|In exit access||0||0||3.3||3.3|
|In adjacent outdoor locations||0||0||22||22|
|In other than exit access||0||6.6||6.6||6.6|
|In other than exit access||0||0||6.6||6.6|
For SI: 1 pound = 0.454 kg.
Where any device having an open flame or surface temperature greater than 800°F (427°C) is used in a room containing more than 6.6 pounds (3 kg) of refrigerant in a single independent circuit, a hood and exhaust system shall be provided in accordance with Section 510. Such exhaust system shall exhaust combustion products to the outdoors.