Refrigeration compressor systems shall comply with the following:
- Single-compressor systems that do not have variable capacity capability.
- Suction groups that have a design saturated suction temperature of 30°F (-1.1°C) or higher, suction groups that comprise the high stage of a two-stage or cascade system, or suction groups that primarily serve chillers for secondary cooling fluids.
- 2.1. Insulation for liquid lines with a fluid operating temperature less than 60°F (15.6°C) shall comply with Table C403.2.10.
- Compressors that incorporate internal or external crankcase heaters shall provide a means to cycle the heaters off during compressor operation.