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// CODE SNIPPET

1107.1.7 Group A2L and B2L Refrigerants

California Mechanical Code 2019 > 11 Refrigeration > 1107.0 Machinery Room, Special Requirements > 1107.1 General > 1107.1.7 Group A2L and B2L Refrigerants
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Where refrigerant of Groups A2L or B2L are used, the requirements of Class 1, Division 2, of the California Electrical Code, shall not apply to the machinery room provided that the conditions in Section 1107.1.7.1 through Section 1107.1.7.3 are met.

1107.1.7.1 Mechanical Ventilation

The mechanical ventilation system in the machinery room is run continuously in accordance with Section 1106.2.5 and failure of the mechanical ventilation system actuates an alarm, or the mechanical ventilation system in the machinery room is activated by one or more refrigerant detectors, in accordance with the requirements of Section 1106.2.2.1 and Section 1106.2.2.2.

1107.1.7.2 Refrigeration Detectors

For the refrigerant detection required in Section 1106.2.2.1, detection of refrigerant concentration that exceeds 25 percent of the LFL or the upper detection limit of the refrigerant detector, whichever is lower, shall automatically de-energize the following equipment in the machinery room:
  1. refrigerant compressors
  2. refrigerant pumps
  3. normally-closed automatic refrigerant valves

1107.1.7.3 Machinery Rooms

The machinery room shall comply with Section 1107.1.8.

Related Code Sections


1107.1.7 Refrigeration, Group A2L and B2L Refrigerants
Where refrigerant of Groups A2L or B2L are used, the requirements of Class 1, Division 2, of the California Electrical Code , shall not apply ...
California Mechanical Code 2019 > 11 Refrigeration > 1107.0 Machinery Room, Special Requirements > 1107.1 General > 1107.1.7 Group A2L and B2L Refrigerants
1104.5 Refrigeration, Flammable Refrigerants
The total of Group A2, B2, A3, and B3 refrigerants, other than Group A2L and B2L refrigerants shall not exceed 1100 pounds (498.9 kg) without ...
California Mechanical Code 2019 > 11 Refrigeration > 1104.0 Requirements for Refrigerant and Refrigeration System Use > 1104.5 Flammable Refrigerants
1103.1.1 Refrigeration, Safety Group
class. For the purposes of this chapter, the refrigerant Groups A1, A2L, A2, A3, B1, B2L, B2, and B3 shall be considered to be individual and distinct ...
California Mechanical Code 2019 > 11 Refrigeration > 1103.0 Classification > 1103.1 Classification of Refrigerants > 1103.1.1 Safety Group
1107.0 Refrigeration, Machinery Room, Special Requirements
systems that contain more than 110 pounds (50 kg) of any Group A2L, A2, A3, B2L, B2, or B3, refrigerant shall have not less than one exhaust air inlet ...
California Mechanical Code 2019 > 11 Refrigeration > 1107.0 Machinery Room, Special Requirements
1107.1 Refrigeration, General
systems that contain more than 110 pounds (50 kg) of any Group A2L, A2, A3, B2L, B2, or B3, refrigerant shall have not less than one exhaust air inlet ...
California Mechanical Code 2019 > 11 Refrigeration > 1107.0 Machinery Room, Special Requirements > 1107.1 General
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