Packaged scroll modules are available in 20-, 30-, 50-, 70- and 85-tons with dual-independent scroll compressors. The 105-, 135- and 145-ton modules utilize dual-tandem scroll compressor pairs with each pair on independent refrigerant circuits. Packaged scroll modules may be mix-matched within limits to form scroll chillers from 20- to 1200-tons utilizing environmentally friendly R410A refrigerant.