High speed setting
The “High speed” setting provides the maximum fan speed according to datasheet. This is achieved
when a jumper connects the +10 V output of the fan motor to the inlet signal (see electrical scheme). If
continuous rpm modulation is needed, the jumper should be removed and replaced by an external signal
(between 0 and 10 V max). The jumper connection can be made in the connec- tion box or inside each fan
motor’s “black box”.
Low speed setting
The “Low speed” setting provides the reduced fan speed according to datasheet. This is achieved with a
resistance kit reducing the steer- ing signal from 10 V to 6.7 V. The fan will oper- ate at a fixed rpm value.
If continuous rpm modulation is needed, the resistance kit should be removed and replaced by an external
signal (between 0 and 6.7 V max).
This resistance kit is located inside the connection box (if selected) or inside each fan motor’s “black box”.
AHE00047EN
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Alfa Laval reserves the right to change this specification without prior notification.
