Stop Function (4.3.1); Compensation For Pump Start-Up Time (4.2 - Grundfos CONTROL MPC Installation And Operating Instructions Manual

Setting via control panel
1. Mark the Settings menu with
2. Mark Pump cascade control with
.
3. Mark Pump start and stop speed with
.
4. Mark Use fixed speed with
5. Mark Start of next pump at: 1->2 with
.
6. Set the speed as percentage with
. Set the other pumps in the same way.
7. Mark Instant pump stop at: 1->0 with
.
8. Set the speed as percentage with
. Set the other pumps in the same way.
Factory setting
The function is set to calculated speed.
11.7.20 Min. performance (4.2.9)
Fig. 56 Min. performance
Description
This function ensures circulation in a system. Note that the stop
function, if activated, can influence this function. See section
11.7.23 Stop function (4.3.1). Examples:
• If 0 pumps have been selected, the stop function can stop the
pump if there is no or a very small consumption.
• If pumps have been selected, the stop function is not active.
Setting via control panel
1. Mark the Settings menu with
2. Mark Pump cascade control with
.
3. Mark Min. performance with
4. Set Number of pumps with
5. Mark Speed with or
and save with .
Factory setting
The number of pumps is set to 0. The speed in closed loop is set
to 25 %.
36
.
or , and press
or , and press
or , and press .
or , and press
or , and save with
or , and press
or , and save with
.
or , and press
or , and press
or , and save with
. Set the speed with or

11.7.21 Compensation for pump start-up time (4.2.10)

Fig. 57 Compensation for pump start-up time
Description
The function is used for Control MPC-F systems only.
The purpose is to avoid disturbances when a mains-operated
pump with fixed speed is started. The function compensates for
the time it takes a mains-operated pump to reach its full
performance after start. The start-up time of the mains-operated
pump must be known.
Setting via control panel
1. Mark the Settings menu with
2. Mark Pump cascade control with
.
3. Mark Compensation for pump start-up time with
, and press
4. Set the start-up time with
Factory setting
The start-up time is set to 0 seconds.
.
.
,
.
or , and press
.
or , and save with
or
.