Min. Duty (4.3.14 - Grundfos CONTROL MPC Installation And Operating Instructions Manual

11.7.33 Min., max. and user-defined duty (4.3.14)
Fig. 74 Min., max. and user-defined duty
Description
This function makes it possible to let the pumps run in open loop
at a set pump performance.
Setting range
The CU 351 makes it possible to change between three operating
modes:

1. Min. duty (4.3.14.1).

2. Max. duty (4.3.14.2).
3. User-defined duty (4.3.14.3).
For each of these modes, the number of
operating pumps and the pump performance
Note
(speed) can be set.
44
11.7.34 Min. duty (4.3.14.1)
Fig. 75 Min. duty
Description
In all systems, apart from Control MPC-S, minimum duty is only
possible for variable-speed pumps. In Control MPC-S systems,
only the number of pumps running at 100 % speed can be set.
Setting range
• Number of pumps in operation.
• Speed as percentage (25 to 100 %) for variable-speed pumps.
Setting via control panel
1. Mark the Settings menu with
2. Mark Secondary functions with
3. Mark Min., max. and user-defined duty with
press .
4. Mark Min. duty with
5. Mark Number of pumps in operation, min. duty with
.
6. Set the number with
7. Mark Speed with or
8. Set the value with or
Factory setting
Number of pumps in operation during min. duty:
Speed as percentage for variable-speed pumps:
.
or , and press
or
or , and press .
or , and save with .
.
, and save with .
.
, and
or
1
70