This refrigerant alarm serves two chiller rooms and alerts operators and other staff that refrigerant has been released into the mechanical room. Chillers have a built in pressure relief valve that will release the refrigerant in the event too much pressure builds up in the system. This prevents a possible explosion from too much pressure and also protects the equipment from a catastrophic failure that would make the chiller unusable. Other failure scenarios that set off the refrigerant alarm includes a refrigerant leak from the chiller so the alarm would alert the maintenance staff of a chiller refrigeration leak condition. Refrigerant will asphyxiate humans and the alarm is required by code for obvious safety reasons. The refrigerant alarm control automatically sets off audible horns, sirens, and automatically activates exhaust fans to evacuate the refrigerant from the mechanical room.