Equipment not designed for operation at AHRI Standard 550/590 test conditions of 44°F (7°C) leaving chilled-water temperature and 2.4 gpm/ton evaporator fluid flow and 85°F (29°C) entering condenser water temperature with 3 gpm/ton (0.054 I/s • kW) condenser water flow shall have maximum full-load kW/ton (FL) and part-load ratings requirements adjusted using Equations 4-6 and 4-7.
|Kadj||=||A × B|
|FL||=||Full-load kW/ton value as specified in Table C403.2.3(7).|
|FLadj||=||Maximum full-load kW/ton rating, adjusted for nonstandard conditions.|
|IPLV||=||Value as specified in Table C403.2.3(7).|
|PLVadj||=||Maximum NPLV rating, adjusted for nonstandard conditions.|
|A||=||0.00000014592 • (LIFT)4 – 0.0000346496 • (LIFT)3 + 0.00314196 • (LIFT)2 – 0.147199 • (LIFT) + 3.9302|
|B||=||0.0015 • Lvg Evap + 0.934|
|LIFT||=||LvgCond – Lvg Evap|
|LvgCond||=||Full-load condenser leaving fluid temperature (°F).|
|LvgEvap||=||Full-load evaporator leaving temperature (°F).|
The FLadj and PLVadj values are only applicable for centrifugal chillers meeting all of the following full-load design ranges:
- Minimum evaporator leaving temperature: 36°F.
- Maximum condenser leaving temperature: 115°F.
- 20°F ≤ LIFT ≤ 80°F.