Mixed Pump Configuration With Alternation - Danfoss MCO 101 Manual

Extended and Advanced Cascade Controller
Option
Variable Speed
100%
100%
100%

3.1.7 Mixed Pump Configuration with Alternation

In this configuration, it is possible to alternate the drive between two pumps along with controlling additional fixed-speed pumps. The cascade controller
will attempt to balance the running hours between all of the pumps as specified by the Runtime Balancing parameter.
Figure 3.7: Example 1
The two pumps can be ether variable speed or fixed-speed with equal running hours.
For this configuration, relay selections in Group 27-7* "Connections" are as follows:
27-70 RELAY 1 → [8] Pump 1 to Drive 1
27-71 RELAY 2 → [16] Pump 2 to Drive 1
27-72 RELAY 10 → [72] Pump 1 to Line Voltage
27-73 RELAY 11 → [73] Pump 2 to Line Voltage
27-74 RELAY 12→ [0] Standard Relay
Fixed Speed
200%
100% + 300%
100% + 200% + 600%
®
MI.38.C2.22 - VLT is a registered Danfoss trademark
(no control between 100% and 200%)
(no control between 200% and 300%)
(no control between 400% and 600%)
3 Supported Configuration
3
3-7