Illustration 2.1 Control Circuit Alternating Lead Pump (4 Pumps)
Illustration 2.2 Mains Circuit Alternating Lead Pump (4 Pumps)
The fixed speed pump configuration provides a cost
effective method for controlling up to 9 pumps. It is able
to control system output by controlling the number of
running pumps as well as the speed of the single variable
speed pump.
In this configuration the VLT
®
AQUA Drive controls one
variable speed pump and up to 8 fixed speed pumps. The
fixed speed pumps are staged and de-staged as needed
through contactors direct online. The variable speed pump
provides the finer level of control needed between the
stages.
The direct online pumps are staged or de-staged
depending on the feedback.
130BA592.12
Illustration 2.3 Fixed Speed Pump Configuration Example
Application Types
VLT
®
AQUA Drive MCO 101/MCO 102
6
MI38C402 - VLT
®
is a registered Danfoss trademark
2
2
