AEC ACOA Series Air-Cooled Central Chillers - Manual (Page 40)

Figure 20
ACOA Fan Cycling Control Chart
ACOA Refrig. Fan number “On” at each step
model circuit Step > 1 2 3 4 Remarks
ACOA15 1 OFF # 1 # 2
ACOA20 1 OFF # 1 # 2
ACOA25 1 OFF # 1 # 2 All fans in separate compartments.
ACOA30 1 OFF # 1 # 2 # 3
ACOA35 1 OFF # 1 # 2 # 3
ACOA45 1 OFF # 1 # 3
ACOA45 2 OFF # 2 # 4 2, 3, and 4 Compressor ACOAs have
ACOA55 1 OFF # 1 # 3 all fans in separate compartments.
ACOA55 2 OFF # 2 # 4 # 6
ACOA70 1 OFF # 1 # 3 # 5 Odd # Fans - Circuit 1
ACOA70 2 OFF # 2 # 4 # 6
ACOA80 1 OFF # 1 # 3 # 5 # 7 Even # Fans - Circuit 2
ACOA80 2 OFF # 2 # 4 # 6 # 8
ACOA90 1 OFF
ACOA90 2 OFF
ACOA90 3 OFF
ACOA100 1 OFF
ACOA100 2 OFF
ACOA100 3 OFF
ACOA110 1 OFF
ACOA110 2 OFF
ACOA110 3 OFF
ACOA110 4 OFF
ACOA125 1 OFF
ACOA125 2 OFF
ACOA125 3 OFF
ACOA125 4 OFF
ACOA135 1 OFF
ACOA135 2 OFF
ACOA135 3 OFF
ACOA135 4 OFF
Note: Refer to Figure 12 on Page 29 for fan pressure switch settings.
ACOA Series Air-Cooled Central Chillers
Page 39