Figure 20 acoa fan cycling control chart – AEC ACOA Series Air-Cooled Central Chillers User Manual
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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