Under ASHRAE 15, which item is not compulsory in the room containing an R-717 appliance?

• A. Ventilation system
• B. Emergency shutoff
• C. Alarm signage
• D. Refrigerant detector

Answer: (D)

In rooms with ammonia (R-717) equipment, safety measures focus on controlling exposure and enabling quick response to leaks. Ventilation is required to dilute any released ammonia and keep concentrations from reaching dangerous levels. An emergency shutoff is needed to quickly isolate the system if a leak or other hazard is detected. Alarm signage is required to clearly warn personnel about the hazard and direct them to take appropriate action. A refrigerant detector, while very helpful for early leak detection, is not a universal requirement of ASHRAE 15 for every room containing an R-717 appliance. Its installation is often driven by risk assessment or local codes, not by the standard alone.