Machinery rooms shall be provided
with a refrigerant detector with an audible and visible,
alarm. Where ammonia is used as the refrigerant, detection
shall comply with IIAR 2. For refrigerants other than ammonia,
refrigerant detection shall comply with Section 606.8.1.Machinery rooms shall contain
a refrigerant detector with an audible and visual alarm. The
detector, or a sampling tube that draws air to the detector,
shall be located in an area where refrigerant from a leak will
concentrate. The alarm shall be actuated at a value not greater
than the corresponding TLV-TWA values shown in the California
Mechanical Code for the refrigerant classification.
Detectors and alarms shall be placed in approved locations.
The detector shall transmit a signal to an approved location.
A detector, or
a sampling tube that draws air to a detector, shall be provided
at an approved location where refrigerant from a
leak is expected to accumulate. The system shall be
designed to initiate audible and visible alarms inside of
and outside each entrance to the refrigerating machinery
room and transmit a signal to an approved location where
the concentration of refrigerant detected exceeds the
lesser of the following:
- The corresponding TLV-TWA values shown in the California Mechanical Code for the refrigerant classification.
- 25 percent of the lower flammable limit (LFL).