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Section 1106 Machinery Room, Special Requirements
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There shall not be an open flame-producing device or continuously operating hot surface over 800°F (427°C) permanently installed in the room.
- Machinery rooms equipped with a vapor detector that will automatically start the ventilation system at the ventilation rate specified in Section 1105.6.3, and that will actuate an alarm at a detection level not to exceed 1,000 ppm.
- Machinery rooms conforming to the Class 1, Division 2, hazardous location classification requirements of NFPA 70.
The machinery room shall be provided with a refrigerant detection system. The refrigerant detection system shall be in accordance with Section 605.8 of the International Fire Code and all of the following:
A clearly identified switch of the break-glass type or with an approved tamper-resistant cover shall provide off-only control of refrigerant compressors, refrigerant pumps, and normally closed, automatic refrigerant valves located in the machinery room. Additionally, this equipment shall be automatically shut off whenever the refrigerant vapor concentration in the machinery room exceeds the vapor detector's upper detection limit or 25 percent of the LEL, whichever is lower.
Refrigeration units and systems shall be provided with approved emergency signs, charts, and labels in accordance with the International Fire Code.