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Switching sequence KKGG
Fan stage:
L1
Stern
S1 L2
Stern
S2 L1
Δ
S3 L2
Δ
S4
F
Fan 1: OFF / Fan 2: low speed
F
F
Fan 1; low speed / Fan 2: low speed
F
Fan 1; low speed / Fan 2: OFF
Fan 1: OFF / Fan 2: OFF
The following table shows the control of the fan outputs using the example of a system with three fans and four
fan stages using the KKGG operating mode:
Switching sequence KKKG
Fan stage:
L1S1 L2 S2 L3S3
Star/Δ S4
Shifting up
Fans 1, 2 and 3 OFF
F
Fan 1 low speed / Fans 2 and 3 OFF
F
F
Fans 1 and 2 low speed / Fan 3 OFF
F
F
F
Fans 1, 2 and 3 low speed
F
F
F
F
Fans 1, 2 and 3 high speed
Shifting down
All fans OFF
F
F
F
Fans 1, 2 and 3 low speed
F
F
Fans 1, 2 low speed / Fan 3 OFF
F
Fan 1 low speed / Fans 2 and 3 OFF
All fans OFF
Summary of Contents for VS 3015 C
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