DP Megacontrol Series User manual

Control units
Installation and operating instructions
Series: Megacontrol

2
Table of Contents
1 Introduction
1.1 Preface................................................................................................................................................... 4
1.2 Icons and symbols ................................................................................................................................. 4
2 Identification, service and technical support
2.1 Identification, service and technical support .......................................................................................... 5
2.2 Supplementary documentation .............................................................................................................. 5
3 Warranty
3.1 Terms of warranty .................................................................................................................................. 6
4 Safety and environment
4.1 General .................................................................................................................................................. 7
4.2 Environmental aspects........................................................................................................................... 7
5 Introduction
5.1 General .................................................................................................................................................. 8
5.2 Intended use .......................................................................................................................................... 8
5.3 Working range........................................................................................................................................ 8
5.4 Functioning ............................................................................................................................................ 9
6 Transport
6.1 Transport and storage.......................................................................................................................... 10
7 Installation
7.1 Mechanical installation..........................................................................................................................11
7.2 Electrical installation .............................................................................................................................11
7.3 Commissioning .................................................................................................................................... 12
8 Operation
8.1 Control panel (HMI).............................................................................................................................. 13
8.2 Manual operation of the pumps ........................................................................................................... 15
8.3 Retrieve and reset a fault..................................................................................................................... 16
9 Hydro-unit configuration
9.1 Hydro-Unit MC ..................................................................................................................................... 17
9.2 Hydro-Unit MC ++ ................................................................................................................................ 18
9.3 Hydro-Unit MCJ ................................................................................................................................... 19
9.4 Hydro-Unit MCF ................................................................................................................................... 20
9.5 Hydro-Unit MCMF ................................................................................................................................ 21
9.6 Hydro-Unit PumpDrive 2 Eco............................................................................................................... 21
9.7 Hydro-Unit Level control ...................................................................................................................... 24
9.8 Explanation of parameters ................................................................................................................... 25
9.9 Break-Unit Megacontrol (Rainwater recovery)..................................................................................... 30
10 Parameters
10.1 Parameter list....................................................................................................................................... 33
11 Faults
11.1 Failure messages Megacontrol............................................................................................................ 58

3
11.2 Failure messages Danfoss VFD .......................................................................................................... 60
12 Annexes
12.1 Megacontrol ......................................................................................................................................... 64
12.2 Built-in diagram.................................................................................................................................... 65
12.3 Electrical connections .......................................................................................................................... 65
12.4 EC declaration of conformity................................................................................................................ 68

4
1 Introduction
1.1 Preface
This manual contains important information for
reliable, proper and efficient operation. Compliance
with the operating instructions is of vital importance to
ensure reliability and a long service life of the product
and to avoid any risks.
The first chapters contain information about this
manual and safety in general. The following chapters
provide information about normal use, installation,
maintenance and repairs of the product. The annex
contains the declaration(s) of conformity.
•Make yourself familiar with the content.
•Accurately follow the directions and instructions.
•Never change the sequence of the operations to
be carried out.
•Keep this manual or a copy of it together with the
logbook in a fixed place near the product which
can be accessed by all personnel.
1.2 Icons and symbols
In this manual and in all accompanying
documentation the following icons and symbols are
used.
WARNING
Danger of electric Voltage. Safety sign
according to IEC 417 - 5036
WARNING
Operations or procedures, if carried out
without caution, may cause personal
injury or damage to the product.
General hazard sign according to ISO
7000-0434
ATTENTION
Is used to introduce safety instructions
whose non-observance may lead to
damage to the product and its
functions.
ENVIRONMENTAL INSTRUCTION
Remarks with respect to the
environment.
READ THE (SUPPLEMENTARY)
DOCUMENTATION
Read the installation and operating
instructions.

5
2 Identification, service and technical
support
2.1 Identification, service and
technical support
The system is identified based on the text
“Megacontrol ” as given on the front of the system.
Table 1: Control unit
The following address data are available for service
and technical support:
Table 2: Address service department
2.2 Supplementary
documentation
This version is valid from Megacontrol version V1.7.1
Apart from this manual, the additional documentation
given below is available as well:
Table 3: Supplementary documentation
Table 4: Megacontrol versions
Indication Meaning
Megacontrol Type of Control unit
DP-Pumps
Kalkovenweg 13
2401 LJ Alphen a/d Rijn
The Netherlands
Tel: [phone]
Fax: [phone]
Internet: www.dp-pumps.com
E-mail: [e-mail]
Document Code
General terms of delivery 119 / 1998
Manual WSD-Sensor BE00000250
Modbus BE00000584
Profibus BE00000585
Also see: www.dp-pumps.com
Firm ware version (see parameter: 4-1-3) Manual
version
Megacontrol V 1.52 01-2013
Megacontrol V 1.57 01-2014
Megacontrol V 1.6.2 06-2015
Megacontrol V 1.7.1 05-2016
Also see: www.dp-pumps.com

6
3 Warranty
3.1 Terms of warranty
The warranty period is settled by the terms of your
contract or at least by the general terms and
conditions of sales.
ATTENTION
Modifications or alterations of the
product supplied are only permitted
after consultation with the
manufacturer. Original spare parts and
accessories authorized by the
manufacturer ensure safety. The use of
other parts can invalidate any liability of
the manufacturer for consequential
damage.
ATTENTION
The warranty relating to the operating
reliability and safety of the product
supplied is only valid if the product is
used in accordance with its designated
use as described in the following
sections of this manual. The limits
stated in the data sheet must not be
exceeded under any circumstances.
The warranty becomes invalid if one or more of the
points below occur.
•The buyer makes modifications himself.
•The buyer carries out repairs himself or has
these carried out by a third party.
•The product has been handled or maintained
improperly.
•The product has non original DP-Pumps spare
parts fitted.
DP-Pumps repairs defects under warranty when:
•They are caused by flaws in the design, the
material or the production.
•They are reported within the warranty period.
Other terms of warranty have been included in the
general terms of delivery, which are available upon
request.

7
4 Safety and environment
4.1 General
This DP-Pumps product has been developed using
state-of-the-art technology and is manufactured with
utmost care and is subject to continuous quality
control.
DP-Pumps does not accept any liability for damage or
injury caused by not following the directions and
instructions in this manual or by carelessness during
the installation, use or maintenance of the product.
Non-compliance with the safety instructions can
jeopardize the safety of personnel, the environment
and the product itself. Non-compliance with these
safety instructions will also lead to forfeiture of any
and all rights to claims for damages.
Non-compliance can result in:
•failure of important pump/system functions,
•failure of prescribed maintenance or service,
•injury caused by electrical, mechanical and
chemical effects,
•leakage to the environment of hazardous
substances,
•explosions.
Depending on the application, extra safety measures
may be required. Contact DP-Pumps if a potential
danger arises during use.
ATTENTION
The owner of the product is responsible
for compliance with the local safety
regulations and internal company
guidelines.
ATTENTION
Not only must the general safety
instructions laid down in this chapter
on "Safety" be complied with, but also
the safety instructions outlined under
specific headings.
4.2 Environmental aspects
4.2.1 General
This product of DP-Pumps is designed to function in
an environmentally friendly way during their entire life.
ENVIRONMENTAL INSTRUCTION
Always act according to the laws, by-
laws regulations and instructions with
respect to health, safety and the
environment.
4.2.2 Dismantling
Dismantle the product and dispose of it in an
environmentally friendly way. The owner is
responsible for this.
ENVIRONMENTAL INSTRUCTION
Ask at the local government about the
re-use or the environmentally friendly
processing of discarded materials.
ENVIRONMENTAL INSTRUCTION
All components of the Megacontrol are
manufactured in accordance with RoHS
II directive 2011/65/EU.

8
5 Introduction
5.1 General
Control units of the type Megacontrol are
manufactured by DP-Pumps.
5.2 Intended use
The control unit is suitable for controlling a Hydro-Unit
consisting of 1, 2, 3, 4, 5 or 6 pumps within the
indicated working range (see “Working range“).
Any other or further use of the control unit is not in
conformity with its intended use. DP-Pumps does not
accept any liability for any damage or injury resulting
from this. The control unit has been produced in
accordance with the current standards and
guidelines. Use the control unit exclusively in a
perfect technical state, in conformity with the intended
use described below.
The Intended use as laid down in ISO 12100:2010 is
the use for which the technical product is intended
according to the specifications of the manufacturer.
The use of the product has been described in the
available documentation / information. Always
observe the instructions given in the installation and
operating instructions. When in doubt the product
must be used as becomes evident from its
construction, version and function.
5.3 Working range
The working range of the control unit can be
summarized as follows:
Table 5: Working range of the Megacontrol
Table 6: Specific applications of the Megacontrol
5.3.1 WSD-Sensor (option)
The working range of the WSD-Sensor can be
summarized as follows:
Table 7: Working range of the WSD-Sensor
ID2982/07062007
Figure 1: Control units of the type
Megacontrol
20070476-A
Type Megacontrol
Maximum ambient temperature
[°C]
50
Relative atmospheric humidity
[%]
20 - 90 (no condensation)
Voltage [V] 1 x 230 V AC ± 5%
Frequency [Hz] 50/60
Type Application area
Megacontrol Building possible in the installations
listed below:
•Hydro-Unit® with 1 - 6 pumps
•Break-Unit with 1 - 6 pumps
•Fire-Unit with 1 - 6 pumps
Type WSD-Sensor
Maximum ambient temperature [°C] 30
Relative atmospheric humidity [%] -
Voltage [V] -
Frequency [Hz] -
Medium temperature [°C] 5 - 30
Switching flow [l/min] ± 14

9
Table 8: Specific applications WSD
5.4 Functioning
5.4.1 Standard operation
The Megacontrol is an intelligent control unit for
different components of pressurization systems
consisting out of a maximum of 6 pumps. The
required system pressure is sensed by a pressure
sensor on the outlet side of the installation.
When as a result of a decreasing water volume the
pressure drops below the pressure set point, a pump
will be switched on.
When the required system pressure has been
reached, the pumps are switched off one at a time.
The minimum run time is optimized constantly, which
results in a considerable energy saving.
5.4.2 Custom made settings
The Megacontrol can be programmed through the
human machine interface (HMI) operating panel and
has been protected against unauthorized use by a
password.
Also, the service port provides access to the
parameters of the program which can be used to
optimize the functionality of the installation, (see:
“Parameter list”).
WARNING
For access to the parameters of the
program using the service port, always
use the special service port cable!
The special service port cable (Art. nr. 6147117698)
can by ordered separately.
5.4.3 Number of operating hours per pump
The current number of operating hours of a pump
determines which pump will be switched on or off
next. The pump with the fewest operating hours will
be switched on first and the pump with the most
operating hours will be switched off first. This makes
sure that all pumps have an equal number of
operating hours, including the backup pump.
5.4.4 Test run
In order to prevent pumps from standing still for a
longer period of time, an automatic test run procedure
is provided as a standard.
5.4.5 Functioning WSD-Sensor (option)
In combination with the Megacontrol, the WSD can
generate a failure message when, during a
(adjustable) period of time, insufficient refreshment of
the membrane switch vessel occurs.
The failure message is generated when:
•Insufficient refreshment occurs;
•The membrane of the membrane switch vessel
is defective;
•There is no air left in the membrane switch
vessel;
•The installation is not set / installed correctly.
5.4.6 Temperature-sensor (option)
When the Megacontrol is fitted with a temperature
sensor, it can generate a temperature-dependent
failure message.
Type Applications
WSD Installations with a maximum of 3
membrane switch vessels.

10
6 Transport
6.1 Transport and storage
1. Transport the control unit in the position as
indicated on the pallet or packaging.
2. Check if the control unit is stable.
3. Observe the instructions on the packaging (if
present).
ATTENTION
Store the control unit in a dry and dust-
free place.

11
7 Installation
7.1 Mechanical installation
ATTENTION
Contact the supplier if parts are missing
or damaged.
Build in the control unit using suitable fastening
material. Consult the annex “Built-in diagram" for the
correct overall dimensions.
7.2 Electrical installation
WARNING
Only authorized personnel is allowed to
connect the control unit electrically in
accordance with the local regulations.
Electrical connections
•Make sure that the electric control unit
specifications correspond with the power supply
to which is connected.
•Consult the annex "Electrical diagram" for a list
of all electrical power points.
7.2.1 Recommended RS485-termination for
Megacontrol
The new board for Megacontrol is based on a new
hardware platform. One new feature is, that the
clamps for the external RS485-bus (J301) will now
benefit the advantage of galvanic isolated bus- and
GND-lines.
7.2.2 Parameter settings of the frequency
converters
At the configuration VFD fixed all (parameter 3-3-3)
you can set the selected VFD (parameter 3-4-3-1).
Before you can set the VFD you have to disable the
pump by pump in 'Operating mode: off' (parameter 1-
2-1).
By setting the VFD's using the Megacontrol use the
following sequence:
Table 9: Megacontrol parameter
After entering these parameters, the other
parameters can be set at their discretion. Always
check the correct setting of the frequency converters
parameters.
ARS485-termination with 1…6 “DANFOSS Micro-
Drives”
1 Megacontrol : keep the termination clamps on the
Megacontrol T+ / T- open
2 Microdrives: switch the bus termination to position
on, on each Micro Drive.
B1 RS485-termination with 1…2 “DANFOSS AQUA
Drives”
1 Megacontrol : keep the termination clampson the
Megacontrol T+ / T- open
2 AQUA Drive: switch the bus termination to position
on, on each AQUA Drive
B2 RS485-termination with 3…6 “DANFOSS AQUA
Drives”
1 Megacontrol : keep the termination clamps on the
Megacontrol T+ / T- open
2 AQUA Drive: set the bus termination only on the
last AQUA Drive
3 External termination: Place, near to the Megacon-
trol, an external active bus termination, like nor-
mally used for Profibus, for example: 6ES7 972-
0DA00-0AA0 or FBCon DP M12 Term 24V
No Parameter Description
1 3-4-3-20 Motor speed unit Hz
2 3-4-3-13 P nominal of VFD
3 3-4-3-14 U nominal of VFD
4 3-4-3-15 F nominal of VFD
5 3-4-3-16 I nominal of VFD
6 3-4-3-17 RPM nominal of VFD
7 3-4-3-9 VFD Ramp-Up
8 3-4-3-10 VFD Ramp-Down
9 3-4-3-11 VFD min. frequency
10 3-4-3-12 VFD max. frequency

12
7.2.3 Using contactors
ATTENTION
Always place, using contactors and/or
auxiliary relays, a suitable RC filter or
varistor across the coil, e.g. Siemens
3RT29-16-1CD00
7.3 Commissioning
The control unit is fully programmed and preset with
factory default settings. Use the control panel, or the
service port to access the parameters of the program
which can be used to optimize the functionality of the
installation, (see: “Parameter list”).

13
8 Operation
8.1 Control panel (HMI)
The control panel comprises a back-lit display,
function, navigation, and operating keys, LED’s, and
2 access points for the service interface. The display
shows important information for pump system
operation. Data can be displayed in plain text and
parameters can be set.
Table 10: Traffic lights
Table 11: Function keys
Table 12: Navigation keys
ID 2944
Figure 2: Front Megacontrol
20140253
A: LED’s
The “traffic light” signals provide information about the
pump system’s operating status. LED’s:
•Red: Alert / urgent alarm is active.
•Amber: Warning / non-urgent alarm is active.
•Green: O.K. / trouble-free operation.
A
B
C
D
B: Function keys
You can use the function keys to access the elements at
the first menu level directly: Operation, Diagnosis, Settings
and Information.
Operation
Diagnosis
Settings
Information
C: Navigation keys
The navigation keys are used for navigating in the menu
and for confirming settings.
Up or Down
•Move up / down through the root
menu (displays the measured values
of the system input);
•Move up / down through the menu
options or;
•Increase / decrease a value when you
are entering numerals.
Escape key
•Delete / reset entry (the entry is not
saved);
•Return to the previous menu level.
OK key
•Access to the quick menu;
•Confirm a setting;
•Confirm a menu selection.
•Go to the next number when you are
entering numerals.
Help key
•Displays a help text for each selected
menu option.

14
8.1.1 Display
The 7-row display contains the following information:
ID 2987
Table 13: Display rows
The number of the current menu or parameter is
displayed in the top left of the screen. This number
indicates the path through the menu levels and,
therefore, allows you to quickly locate parameters
(see “Parameter list”).
The date and time is displayed in the bottom right of
the screen. If a fault occurs, this is displayed in the
bottom line and alternating with the date and time.
8.1.2 Continuous display
When in operation the most common values, like the
system pressure are shown on the display
continuously. By pushing the navigation buttons Up
and Down all selected values are passing by. In
Parameter setting 3-10 “Root menu” these values
can be selected as preset value. The selected values
are marked with a “ √ “
Table 14: Display example
8.1.2.1 Quick menu
Having access to the most used parameters a Quick
menu can be entered by pressing the OK key.
8.1.3 Access levels
To prevent accidental or unauthorized access to the
Megacontrol parameters, various access levels have
been defined.
Table 15: Access levels
D: Service interface RS232
The service interface allows a PC / Notebook to be con-
nected with use of the special service port cable. The Meg-
acontrol PC software can be used to configure and
parameterize the pump system if you do not have access
to a control panel. The Megacontrol software can also be
updated via this interface. A second service interface is
located on the back side of the controller.
Display Meaning
11-1-1 Displays the selected parame-
ter no.
2Parameter / Function Parameter name,
Function key:
•Operation
•Diagnosis
•Settings
•Info
3Parameter name List of selectable parameters
4Level Operating level:
•All
•User
•Service
•Factory
“Scroll bar” within the list of
selectable parameters
5MM-YY 00:00 Current date and time
2
3
5
4
ID 2955
Display
11-1-1
2 System pressure
3 525
4kPa
5MM-JJ 00:00
Access
levels:
Explanation:
Standard Unless users log on to one of the access levels,
they will only have limited access to parame-
ters.
User Access level for expert users. It enables access
to all the parameters required for commission-
ing. You have to enter a password under 3-2-1
“Log in”. The standard password for users is
7353.
Service Access level for service technicians. You have
to enter a password under 3-2-1 Log in.
Factory Access level for the manufacturer only.
2
3
5
4

15
ATTENTION
If no keys are pressed for ten minutes,
the system automatically returns to the
default access level.
8.1.4 Displaying and changing parameters
The parameter numbers contain the navigation path,
which helps you find a particular parameter quickly
and easily. The first digit of the parameter number
indicates the first menu level, which can be called up
directly via the four function keys. Subsequent steps
are carried out via the navigation keys.
8.2 Manual operation of the
pumps
By pressing the Quick access key “Operation”,
information like system pressure and pump load can
be retrieved. Also, the pump operating mode like
Automatic, Manual and Disabled can be alternated /
selected. Subsequent steps are carried out by using
the navigation keys.
1--Operation 2--Diagnosis 3--Settings 4--Info
Example: Parameter 3-5-10 Delta P correction:
First digit of parameter number: 3-5-10
3 Settings 5 Pressure 10 Delta P correction
Press the third function key for Settings. 3-1
appears in the top left of the screen.
Second digit of parameter number: 3-5-10
3 Settings 5 Pressure 10 Delta P correction
Change the display 3-1 on the screen (top
left) to 3-5 by pressing the navigation keys.
To confirm the selection, press OK. 3-5
appears in the top left of the screen.
Third digit of parameter number: 3-5-10
3 Settings 5 Pressure 10 Delta P correction
Change the display 3-5-1 on the screen (top
left) to 3-5-10 by pressing the navigation
keys.
To confirm the selection, press OK. 3-5-10
appears in the top left of the screen.
Example: Parameter 1-2-1 (Pumps) Operation mode:
First digit of parameter number: 1-2-1
1 Operation 2 Pumps 1 Operation mode
Press the first function key for Operation. 1-
1 appears in the top left of the screen.
Second digit of parameter number: 1-2-1
1 Operation 2 Pumps 1 Operation mode
Change the display 1-1 on the screen (top
left) to 1-2 by pressing the navigation keys.
To confirm the selection, press OK. 1-2
appears in the top left of the screen.
Third digit of parameter number: 1-2-1
1 Operation 2 Pumps 1 Operation mode
To confirm the selection, press OK. 1-2-1
appears in the top left of the screen.
Select the pump number by pressing the
navigation keys.
To confirm the selection, press OK.
Select the operation mode manual
(on (10 s)).
To confirm the selection, press OK.

16
The selected pump will run for a period of 10 seconds
and stops. The pump operation mode is changed to
Disabled (off) This is to avoid that the pump runs
unprotected.
8.2.1 Putting the pump into automatic
operation again
The pump has to be put in operation again by
selecting the Automatic mode.
8.3 Retrieve and reset a fault
Information about faults can be retrieved by pressing
the 'diagnosis' hot key
Stay in the selected parameter 1-2-1 Opera-
tion mode and press OK.
Select the pump number again by pressing
the navigation keys.
To confirm the selection, press OK.
Select the operation mode Automatic.
To confirm the selection, press OK.
Example: Parameter 2-1-1 Current messages
Press the diagnosis key. 2-1 General
appears in the display.
Press the OK key. 2-1-1 Current messages
appears in the display.
Press the OK key again. The list with the
current faults or the message 'no faults'
appears in the display.
When there is a fault that has a circle with a dot in it, the
fault is still active
No Water
When there is a fault that has an open circle, the fault is not
active, but has not been acknowledged yet.
No Water
When there is a fault that has a circle with a dot in it and a
check mark following the fault message, the fault is still
active and the fault has been acknowledged as well. When
the fault is remedied now, it will be reset immediately.
Example: Parameter 2-1-2 History
Press the diagnosis key. 2-1 General
appears in the display.
Press the OK key. The display then shows
2-1-1 Current messages;
2-1-2 History.
You can select History by pressing the navi-
gation key.
Press the OK key. The list of faults from the
past appears.
You can select the fault by pressing the nav-
igation key.
Press the OK key. The below listed informa-
tion becomes visible.
The following information about the fault is known:
•Date and time of occurrence of the fault
•Date and time of acknowledgement of the fault
•Date and time of remedy of the fault

17
9 Hydro-unit configuration
9.1 Hydro-Unit MC
ATTENTION
See factory settings 3-2-2-1
When as a result of an increasing water volume the
pressure drops below the pressure set point, a pump
will be switched on. When the required system
pressure has been reached, the pumps are switched
off one at a time. The minimum run time related
switch-off delay is optimized constantly, which results
in a considerable energy saving.
Table 16: Specific parameter settings MC
Figure 3: 1 pump operation
Figure 4: 2 pump operation
Figure 5: 3 pump operation
Q
H
S
Q
H
S
Q
H
S
Parameter Value
3-3-1 Number of pumps 1
2
3
4
5
6
3-3-2 Inlet Switch
Pressure
Level / valve ON-OFF
Level / valve prop.
3-3-3 Discharge Fixed Speed
3-5-1 Set point ... kPa
3-5-3 Bandwidth 30
3-5-13 Low pressure alarm 100
3-6-1 Opt. pump starts/h 10
3-6-2 Min. run time Default 180 s
DOL ≤ 2.2 kW 90 s
3-6-3 Min. run time corr. 10 s
3-6-8 Run-dry delay Default 30 s
Float/level control 1 s

18
9.2 Hydro-Unit MC ++
ATTENTION
See factory settings 3-2-2-1
When as a result of a increasing water volume the
pressure drops below the pressure set point, a pump
will be switched on. When the required system
pressure has been reached, the pumps are switched
off one at a time. The minimum run time related
switch-off delay is optimized constantly, which results
in a considerable energy saving.
Table 17: Specific parameter settings MC ++
Figure 6: 1 pump operation
Figure 7: 2 pump operation
Figure 8: 3 pump operation
Parameter Value
3-3-1 Number of pumps 1
2
3
4
5
6
3-3-2 Inlet Switch
Pressure
Level / valve ON-OFF
Level / valve prop.
3-3-3 Discharge Fixed Speed
3-5-1 Set point .... kPa
3-5-3 Bandwidth 50
3-5-13 Low pressure alarm 100 kPa
3-6-1 Opt. pump starts/h 30
3-6-2 Min. run time 1 s
3-6-3 Min. run time cor. 1 s
3-6-8 Run-dry delay Default 30 s
Float/level control 1 s

19
9.3 Hydro-Unit MCJ
ATTENTION
See factory settings 3-2-2-1
The Hydro-Unit MCJ is fitted with a jockey pump,
especially suited for installations with strongly
fluctuating water consumption. The jockey pump is a
smaller pump with less capacity but the same
pressure as the main pumps of the installation. The
jockey pump will be started first. If the water
consumption is larger than the capacity of the jockey
pump, one or more main pumps will be switched on,
whereas the jockey pump is switched off. If the
capacity of the main pumps is not sufficient, in case of
a large water consumption, the jockey pump will also
be switched on. A Hydro-Unit can also be fitted with 2
jockey pumps which are each other's backups.
Table 18: Specific parameter settings MCJ
Figure 9: 1 jockey pump operation
Figure 10: 1 main pump operation
Figure 11: 2 main pumps operation
Q
H
S
S
Q
H
S
Q
H
Parameter Value
3-3-1 Number of pumps 1
2
3
4
5
6
3-3-2 Inlet Switch
Pressure
Level / valve ON-OFF
Level / valve prop.
3-3-3 Discharge One Jockey
3-5-1 Set point .... kPa
3-5-3 Bandwidth 30
3-5-13 Low pressure alarm 100 kPa
3-6-1 Opt. pump starts/h 30
3-6-2 Min. run time Default 180 s
DOL ≤ 2.2 kW 90 s
3-6-3 Min. run time corr. 10 s
3-6-8 Run-dry delay Default 30 s
Float/level control 1 s

20
9.4 Hydro-Unit MCF
ATTENTION
See factory settings 3-2-2-1
The Hydro-Unit MCF is equipped with one variable
frequency drive. If the Hydro-Unit is rotation-
controlled, the required system pressure is sensed by
a pressure sensor on the outlet side of the
installation. An integrated adjustable PID-controller in
the software of the Megacontrol ensures that the
system pressure remains constant by successively
switching on or off one or more (whether or not)
rotation-controlled pumps with delay. A pump is only
switched on when 100% or respectively 0% of the
speed has been reached.
Table 19: Specific parameter settings MCF
Figure 12: 1 pump operation, 1 pump variable
Figure 13: 2 pump operation, 1 pump variable
Figure 14: 3 pump operation, 1 pump variable
Parameter Value
3-3-1 Number of pumps 1
2
3
4
5
6
3-3-2 Inlet Switch
Pressure
Level / valve ON-OFF
Level / valve prop.
3-3-3 Discharge VFD change-over
3-4-3-1 Communication Analog 0-20 mA /
4-20 mA
3-4-3-2 Proportional const. 3
3-4-3-3 Integral const. 0.9
3-5-1 Set point .... kPa
3-5-3 Bandwidth 10
3-5-4 Accumulation press. 30 kPa
3-5-13 Low pressure alarm 100 kPa
3-6-1 Opt. pump starts/h 30
3-6-2 Min. run time 1 s
3-6-3 Min. run time corr. 0 s
3-6-8 Run-dry delay Default 30 s
Float/level control 1 s