All systems must meet the cooling efficiency criteria established in this subpart.
The cooling efficiency of a new centrifugal or rotary screw chiller must be 0.61 kW/ton or less (or equivalent if other energy sources are used) at standard rating conditions specified in ARI Standard 550-1992.
The cooling efficiency of a previously used (existing) centrifugal or rotary screw chiller that has been rebuilt or modified must be 0.70 kW/ton or less (or equivalent if other energy sources are used) at standard rating conditions specified in ARI Standard 550-1992.
The coefficient of performance of a new absorption chiller must be at least 0.90 at standard rating conditions specified in ARI Standard 560-1992.
The cooling efficiency of district cooling systems must be at least one kW/ton based on seasonal performance of the district cooling system.
A system using CFC refrigerants does not comply with the energy efficiency criteria of this part.
The cooling efficiency of a system must be certified by a mechanical engineer registered in Minnesota using data provided by the equipment manufacturer.
MS s 446A.21
18 SR 1443
January 19, 2005
Official Publication of the State of Minnesota
Revisor of Statutes