Design Considerations

• Design DX systems with 2 or 3 zones max.
  • Unlimited with Chiller applications
• All zones must have a minimum of 3.5 outlets per ton – (per zone)
  • 4 ton system
    • 4 x 3.5 = 14 outlets per zone minimum
    • 3 zones x 14 outlets = 42 outlets total
    • 42 outlets divided by 4 tons = 10 outlets/ton
• 2 zone systems can be designed with as high as 5 outlets per ton per zone (10/ton total outlets)
• Not recommended to use a bypass duct on DX coil systems

Outlets Per Zone (Per Ton)

Example

Zone 2 Load requires 6 Outlets

Zone 1 Load requires 15 Outlets

3 ton, 2 zone
(3 ton X 3.5 = 11 outlets/zone minimum)
Z-1 = 15 outlets (5/ton)
Z-2 = 11 outlets (3.5/ton min)
26 outlets total = 8.5 / Ton