Grundfos Hydro 2000 S User manual

Hydro 2000 S
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

Declaration of Conformity
We GRUNDFOS declare under our sole responsibility that the products
Hydro 2000 S, to which this declaration relates, are in conformity with the
Council Directives on the approximation of the laws of the EEC Member
States relating to:
— Machinery (98/37/EEC).
Standard used: EN 292.
— Electromagnetic compatibility (89/336/EEC).
Standards used: EN 61 000-6-2 and EN 61 000-6-3.
— Electrical equipment designed for use within certain voltage limits
(73/23/EEC).
Standard used: EN 60 204-1.
Bjerringbro, 15th November 2001
Jan Strandgaard
Technical Manager
2

3
CONTENTS
Page
1. General 5
1.1 Scope of these Instructions 5
1.2 Related Documents 5
2. Product Description 5
2.1 GRUNDFOS Hydro 2000 S 5
2.2 GRUNDFOS Control 2000 S 6
2.2.1 Examples of Booster Sets Hydro 2000 S 7
3. Functions 8
3.1 Control Functions and Settings 8
3.1.1 Monitoring Functions 8
3.1.2 PFU 2000 RAM Settings 8
3.1.3 Closed-Loop Control 9
3.1.4 Cascade Control 9
3.1.5 Manual On/Off and Setting to Max. or Local 10
3.1.6 Water Shortage Monitoring 10
3.1.7 Automatic Pump Change 11
3.1.8 Test Run 11
3.1.9 Clock Functions 11
3.1.10 Standby Pumps 11
3.1.11 Reduced Operation 12
3.1.12 Pump Priority 12
3.1.13 GRUNDFOS BUS 12
3.2 Control Parameters 13
3.2.1 Allocation of Pumps to Zone 13
3.2.2 Zone Type / Control Parameter 13
3.2.3 Priority of Settings 13
3.2.4 Setpoint 14
3.2.5 Setpoint Influences 14
3.2.6 On/Off Band 15
3.2.7 Measuring Unit for Control Value 16
3.2.8 System Time 16
3.2.9 Minimum Switching Sequence 16
3.2.10 Medium Switching Sequence 16
3.2.11 Control Function 17
3.2.12 PFU 2000 Analog Input 1 Configuration 17
3.2.13 PFU 2000 Analog Input 2 Configuration 17
3.2.14 PFU 2000 Analog Input 3 Configuration 17
3.2.15 PFU 2000 Input 4 Configuration 18
3.2.16 Ramp Time 18
3.2.17 Minimum Pump Speed Limit 19
3.2.18 Maximum Limit (Overpressure) 19
3.2.19 Minimum Limit 19
3.2.20 Operation at Minimum Limit 19
3.2.21 Minimum Pre-Pressure 19
3.3 Pump Parameters 19
3.3.1 Maximum Head 20
3.3.2 Operating Hours 20
3.3.3 Start Time 20
4. Installation 20
4.1 Location 20
4.2 Hydraulic Installation 20
4.3 Electrical Connection 20
5. Start-Up 21
5.1 Hydro 2000 S without a PMU 2000 21
5.1.1 Setting via a Temporarily Connected PMU 2000 21
5.2 Hydro 2000 S with a PMU 2000 21
5.3 Direction of Rotation 21
5.4 Taking out of Operation 22
6. Operation 22
6.1 Operation of PMU 2000 22
6.1.1 Display Rules 23
6.1.2 Status Display 23
6.2 Configuration of the PFU 2000 23
6.2.1 PFU 2000 DIP Switch Settings 24
6.2.2 Configuration of PCU Relays 25
7. Monitoring Functions 25
7.1 Faults, General 25
7.2 Pump- and Motor-Related Faults 26
7.2.1 Communication Faults 26
7.2.2 Motor Overtemperature 26
7.3 Zone-Related Faults 26
7.3.1 Transmitter Fault 26
7.3.2 Water Shortage 26
7.3.3 Maximum Limit of Actual Value 26
7.3.4 Minimum Limit of Actual Value 26
7.3.5 Any Fault in the Zone 26
7.3.6 Fault in Any Motor 26
7.4 System-Related Faults 26
7.4.1 Voltage Drop 26
8. Maintenance 27
8.1 Maintenance of Booster Set 27
8.1.1 Pumps 27
8.1.2 Motor Bearings 27
8.1.3 Frost Protection 27
8.2 Maintenance of the Control 2000 S 27
9. Operating and Fault Indications 28
10. Fault Finding Chart 29
11. Technical Data 30
11.1 Hydraulic Data 30
11.2 Operating Conditions 30
11.3 Sound Pressure Level 30
11.4 Electrical Data 31
12. Glossary 32
13. Display Overviews 33

4

5
2. Product Description
2.1 GRUNDFOS Hydro 2000 S
GRUNDFOS booster sets Hydro 2000 S consist of a number of
pumps with all necessary fittings and a GRUNDFOS Control 2000
S mounted on a common base frame, all ready for installation.
A diaphragm tank must be included in the installation.
Fig. 1
TM00 5391 4796
PRESSURE
TRANSMITTER
VALVE
PFU 2000
PRESSURE GAUGE
NON-RETURN
VALVE
ISOLATING
PUMP
Control 2000
GRUNDFOS Booster Set Hydro 2000 S
1. General
1.1 Scope of these Instructions
These Installation and Operating Instructions apply to GRUND-
FOS booster sets Hydro 2000 S.
GRUNDFOS booster sets Hydro 2000 S are designed for the
transfer and pressure boosting of clean water in waterworks,
blocks of flats, hotels, industry, hospitals, schools, etc.
The Hydro 2000 S range includes two types of systems, i.e. MS
and MSH.
1.2 Related Documents
For some booster sets, the detailed information can be found in
the related documents.
• List of Control Parameters (factory configuration).
• Wiring diagram.
• Installation and Operating Instructions.
• Data booklet.
System
Type System Function
Hydro 2000 S
MS All pumps are full-size pumps which are mains-
operated (on/off).
MSH
One half-size pump. The other pumps are full-
size pumps.
All pumps are mains-operated (on/off).

6
Fig. 2
Fig. 3
PFU 2000 Front Cover
Reset
TM00 2721 2397
PMU 2000 Front Cover
TM00 7023 2497
2.2 GRUNDFOS Control 2000 S
The GRUNDFOS Control 2000 S controls a number of pumps on
mains operation.
The Control 2000 S always includes the PFU 2000 with applica-
tion-optimized software, but it is also available with a PMU 2000.
The operating conditions and factory settings can be optimized
via a temporarily connected PMU 2000.
If the Control 2000 S includes the PFU 2000 only, it will be placed
in the front cover. If the Control 2000 S includes both the PFU
2000 and the PMU 2000, the PMU 2000 will be placed in the front
cover and the PFU 2000 inside the cabinet.
The Control 2000 S is factory-assembled and tested with the con-
trol parameters mentioned in the “List of Control Parameters”,
which is delivered with the booster set.
The Control 2000 S offers the following functions:
• Closed-loop control.
• Automatic cascade control of pumps.
• Selection of switching sequences, automatic pump change
and pump priority.
• Manual operation.
• Possibility of various analog setpoint influences:
– friction loss compensation (flow-dependent setpoint
control with or without flow measurement),
– temperature-dependent setpoint control,
– setpoint adjustment.
• Possibility of various digital remote-control functions:
– system on/off,
– reduced operation,
– setpoint control with two-point switch,
– setpoint control with three-point switch,
– alternative setpoint,
– fire-fighting operation,
– switching off individual pumps.
• Pump and system monitoring functions:
– minimum and maximum limits of actual value,
– pre-pressure,
– motor protection,
– BUS communication.
• Display and indication functions:
– 2 x 24 character LCD display,
– green indicator light for operating indications and
red indicator light for fault indications,
– potential-free changeover contacts for operation and fault.
• Clock functions.
• GRUNDFOS BUS communication.

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2.2.1 Examples of Booster Sets Hydro 2000 S
Example:
GRUNDFOS Hydro 2000 MS.
Four pumps and a diaphragm tank.
Example:
GRUNDFOS Hydro 2000 MSH.
One half-size pump, three full-size pumps
and a diaphragm tank.
One pump in operation. One half-size pump in operation.
Three pumps in operation.
One half-size pump and one full-size
pump in operation.
GRUNDFOS Hydro 2000 MS maintains an
almost constant pressure through cutting in/
out the required number of pumps.
The operating range of the pumps will lie
between the lines Hset and Hstop (cut-out
pressure). The cut-out pressure cannot be
set but is calculated automatically.
Changeover among the pumps is automatic
and depends on load, time and fault.
GRUNDFOS Hydro 2000 MSH maintains an
almost constant pressure through cutting in/
out the half-size pump and the full-size
pumps.
The half-size pump will always start first.
The half-size pump will be cut out again
when a full-size pump is cut in.
The operating range of the pumps will lie
between the lines Hset and Hstop (cut-out
pressure). The cut-out pressure cannot be
set but is calculated automatically.
Changeover among the full-size pumps is
automatic and depends on load, time and
fault.
TM00 2674 0294
PFU 2000
TM00 2678 0294
PFU 2000
Q
stop
set
H
H
H
TM00 2749 0294
Q
stop
set
H
H
H
TM00 2773 0294
Q
stop
set
H
H
H
TM00 2751 0294
Q
stop
set
H
H
H
TM00 2775 0294

8
3. Functions
3.1 Control Functions and Settings
The display numbers mentioned in the following refer to the dis-
play overviews in section 13. Display Overviews.
In the PFU 2000, two sets of control parameter settings are
stored:
• PFU 2000 EPROM settings, which are default values.
• PFU 2000 RAM settings, which are configuration values.
(These values can be changed).
The PFU 2000 RAM settings are configured and displayed in the
PMU 2000.
Operation with PFU 2000 EPROM settings or PFU 2000 RAM
settings can be changed by means of the DIP switches in the
PFU 2000.
The PFU 2000 EPROM default settings and the PFU 2000 RAM
settings are listed in the “List of Control Parameters”. This list
should be updated after each change of setting.
PFU 2000 EPROM settings should not be used for continuous op-
eration. It is preferable to operate the booster set with PFU 2000
RAM settings.
3.1.1 Monitoring Functions
The following functions are available:
• Red indicator light (LED) for indication of fault condition.
• Green indicator light (LED) for indication of operating condi-
tion.
• PFU 2000 fault signal relay for indication of fault condition.
• PFU 2000 operating signal relay for indication of operating
condition.
• PMU 2000 fault signal relay for indication of fault condition
(if a PMU 2000 is installed).
• PMU 2000 operating signal relay for indication of operating
condition (if a PMU 2000 is installed).
• GRUNDFOS BUS communication.
See also section 9. Operating and Fault Indications.
Fig. 4
Fig. 5
PFU 2000 Front Cover
Reset
TM00 2721 2397
PMU 2000 Front Cover
TM00 7023 2497
3.1.2 PFU 2000 RAM Settings
The PMU 2000 maintains the PFU 2000 RAM settings as long as
the units are connected via the GRUNDFOS BUS.
If a PMU 2000 is to be connected or replaced, please note the fol-
lowing:
To enter data from a PMU 2000 into the PFU 2000 RAM:
Fig. 6
1. Connect the GRUNDFOS BUS between the PMU 2000 and
the PFU 2000.
2. Switch on the electricity supply to the PMU 2000.
3. Switch on the electricity supply to the PFU 2000.
4. The settings from the PMU 2000 will be entered into the PFU
2000 RAM. This operation will take about 1 minute. During this
period, the PMU 2000 will display “Master”.
To enter data from a PFU 2000 RAM into the PMU 2000:
Fig. 7
1. Connect the GRUNDFOS BUS between the PMU 2000 and
the PFU 2000.
2. Switch on the electricity supply to the PFU 2000.
3. Switch on the electricity supply to the PMU 2000.
4. The settings from the PFU 2000 RAM will be entered into the
PMU 2000. This operation will take about 1 minute. During this
period, the PMU 2000 will display “Slave”.
For further information, see section
3.1 Control Functions and Settings.
PMU 2000
PFU 2000
GRUNDFOS BUS
TM00 8462 2896
PMU 2000
PFU 2000
GRUNDFOS BUS
TM00 8461 2896

9
3.1.4 Cascade Control
Cascade control ensures automatic matching of the performance
to the system demand by cutting in/out the required number of
pumps.The controller will operate the system with as few pumps
as possible.
The frequency of starts and stops is limited by the setting of mini-
mum and medium switching sequences.
The pumps are cut in if the actual value remains below the set-
point.
With the “control function” (display 214) set to “normal”, the
switching-off levels for the cascade-controlled pumps are calcu-
lated as follows:
Operation with PFU 2000 RAM / PMU 2000 Settings:
The actual switching-off level is the lower value of Hstop calcu-
lated with PFU 2000 RAM / PMU settings and PFU 2000 EPROM
settings.
The Hstop is calculated as:
Operation with PFU 2000 EPROM Settings:
The Hstop is calculated as:
Hstop: The pressure at which a pump is cut out.
n: Number of pumps in operation.
H0: Pump head at zero flow.
The default setting of H0with PFU 2000 EPROM
settings is the highest value of:
setpoint max. + 10% of setpoint or
setpoint max. + 5% of transmitter measuring range.
Hp: Pre-pressure.
Hset: Actual setpoint.
On/off-band: The pressure above the setpoint.
If H0+ Hpis higher than “max. limit” (display 228), the value for
“max. limit” is used instead of H0+ Hp.
For further information, see sections
3.2.9 Minimum Switching Sequence,
3.2.10 Medium Switching Sequence and
3.2.17 Minimum Pump Speed Limit.
Hstop
On/off band–
n
---------------------------------------H
set
+=
Hstop
H0HpHset –+
n1+
----------------------------------------- H set +=
3.1.3 Closed-Loop Control
The closed-loop controller (a control system with a feed-back sig-
nal from a transmitter) is programmed for operation of centrifugal
pumps and takes their influence on the hydraulic system into ac-
count.
Fig. 8
The only control parameter to be set to adapt the controller to the
system conditions is “system time” (display 204), instead of PID
parameters as is the case with conventional closed-loop control-
lers.
• Operation with PFU 2000 RAM / PMU 2000 Settings:
With the settings in the start/stop menu (displays 300 and 301)
and with the function selector in the PFU 2000 within the range
from 0% to 100%, the closed-loop controller is operating.
• Operation with PFU 2000 EPROM Settings:
With the function selector in the PFU 2000 within the range
from 0% to 100%, the closed-loop controller is operating.
Fig. 9
For further information, see section
3.2.5 Setpoint Influences.
PMU 2000
PFU 2000
PP
GRUNDFOS BUS
TM00 8277 2596
100%0%
MAXSTOP
Setpoint
Function Selector in the PFU 2000
TM00 5217 2796

10
3.1.5 Manual On/Off and Setting to Max. or Local
Operation with PFU 2000 RAM / PMU 2000 Settings:
Fig. 10
In the start/stop menu, the “On/Off” button on the PMU 2000
gives quick access to:
• manual on/off of zone and setting to max. or local,
• manual on/off of individual pumps.
In this menu, the zone and the pumps allocated to this zone ap-
pear one by one when the arrow buttons are pressed.
The operating condition of the zone or pump in question is dis-
played in the top line. In the bottom line, a new status can be se-
lected.
Start/stop of zones (display 300):
• “on”
All pumps in the zone are ready for operation.
• “off”
All pumps in the zone are switched off.
•“max.”
All pumps in the zone are operating at maximum performance.
•“local”
The controller has been set to local mode and will operate ac-
cording to the local control parameter settings.
See section 6.2.1 PFU 2000 DIP Switch Settings.
If the function selector in the PFU 2000 has been turned to posi-
tion MAX, the setpoint influences, “clock program” and “remote
on/off” are not effective.
Start/stop of pumps (display 301):
• “on”
The pump is ready for operation.
•“off”
The pump is switched off.
Operation with PFU 2000 EPROM Settings:
The controller will operate according to the local control parame-
ter settings.
For further information, see section
6.2.1 PFU 2000 DIP Switch Settings.
On
Off
3.1.6 Water Shortage Monitoring
The water shortage monitoring function switches off all
pumps.
Note: If the booster set has been delivered without a water short-
age monitor, it should not be started until a water shortage moni-
tor has been installed. Otherwise, there is a risk of damage to the
pumps.
If the function “fire fight” (display 222) is activated, the water
shortage monitoring function is suppressed.
Operation with PFU 2000 RAM / PMU 2000 Settings:
Pre-pressure measuring can be set to “on” or “off” (display 216).
Via an Analog Signal:
Set “prepress.measuring” to “on” (display 216) if a pressure
transmitter is installed on the suction side of the booster set.
The PFU 2000 analog input 2 measures the pre-pressure. The
water shortage monitoring will be carried out according to the set
“min. prepressure” (display 231).
Via a Digital Signal:
Set “prepress.measuring” to “off” (display 216).
The signal on the PFU 2000 analog input 2 is evaluated as a dig-
ital signal for water shortage monitoring from a pressure switch,
level switch or an electrode relay.
Operation with PFU 2000 EPROM Settings:
The pre-pressure can be measured via the PFU 2000 analog in-
put 2.
Via an Analog Signal:
If the signal is lower than 5% of the measuring range for more
than 5 secs., a fault is indicated.
Via a Digital Signal:
If the switch contact indicates water shortage for more than 5
secs., a fault is indicated.
For further information, see section
3.2.13 PFU 2000 Analog Input 2 Configuration.

11
3.1.7 Automatic Pump Change
There are three possibilities of automatic pump change:
1. Operation-dependent pump change.
This applies to pumps of equal priority. The pump which is
switched on first will be switched off first if the demand falls.
2. Fault-dependent pump change.
If a pump is faulty, it will be switched off and the next pump
ready for operation will be switched on.
3. Time-dependent pump change.
This ensures that the operating hours are distributed evenly
on the pumps in the zone. This function is combined with the
test run function.
Operation with PFU 2000 RAM / PMU 2000 Settings:
When “pump change” is set to “on” (display 208), time-de-
pendent pump change is carried out at the first time set in
“pump change at” “00:00 h” (display 209).
The default setting of “pump change” is “on” (display 208).
The default setting of “pump change at” is “00:00 h”
(display 209).
If “pump change” is set to “off” (display 208), no time-depend-
ent pump change or test run will be carried out.
Operation with PFU 2000 EPROM Settings:
Time-dependent pump change is carried out the first time
5 minutes after the electricity supply has been switched on
and then every 24 hours.
3.1.8 Test Run
To eliminate the risk of blocking of pumps which are not switched
on regularly, a test run is carried out.
The test run causes all operative pumps to be started once be-
tween two time-dependent pump changes for 1 sec.
3.1.9 Clock Functions
Operation with PFU 2000 RAM / PMU 2000 Settings:
If the system demand varies during the day and/or during the
week, the pump performance required will also vary. In this case,
a clock program can be set in order to achieve optimum perform-
ance of the pumps.
It is possible to set a total of 10 switching times, all with individual
setpoints.
If “setpoint max.” (display 200) is changed after the clock program
has been set, the clock program will be changed proportionally.
Application: Time-dependent reduction of setpoint to minimize
power consumption or to optimize the performance.
Fig. 11
To ensure correct operation with the clock functions, the time and
date can be set in the basic menu of the PMU 2000 (display 103).
Supply failure does not influence the clock program.
Operation with PFU 2000 EPROM Settings:
No clock program.
3.1.10 Standby Pumps
Operation with PFU 2000 RAM / PMU 2000 Settings:
In zones with more than one pump, the number of standby pumps
can be selected in “stand-by pumps” (display 226). A standby
pump is only started if the duty pump is faulty, not to increase the
performance of the system.
The standby pump(s) will be included in the automatic pump
change and the test run.
The setting range is from one pump to the number of pumps con-
nected to the zone less one.
The default setting is 0.
If individual pumps are to be defined as standby pumps, these
pumps must be set to a lower priority than the duty pumps.
For further information, see section
3.1.12 Pump Priority.
Operation with PFU 2000 EPROM Settings:
The default setting is 0.
Setpoint
13
C
A
2Time
B
Clock Program with Three Switching Times
TM00 4989 4894

12
3.1.11 Reduced Operation
Operation with PFU 2000 RAM / PMU 2000 Settings:
If reduced operation is activated, a number of pumps, but not in-
dividual pumps, can be defined as pumps ready for operation.
The system performance is restricted to the set number of
pumps.
Reduced operation is activated if the PFU 2000 input 4 is set to
“reduced op” (display 222) and the input 4 contact is closed.
The number of pumps required to run when reduced operation is
activated is set in the display appearing after display 222.
The setting range is from one pump to the number of pumps con-
nected to the zone less one.
Application: Emergency power operation with a limited perform-
ance.
The default setting is 0.
Operation with PFU 2000 EPROM Settings:
The default setting is 0.
3.1.12 Pump Priority
Operation with PFU 2000 RAM / PMU 2000 Settings:
The set “pump priority” (display 227) determines the operating
priority of the pumps connected to a zone.
Pumps with the highest priority are switched on first. Pumps with
the lowest priority are switched off first.
Pumps of equal priority and equal size are subject to:
First in, first out.
The setting range is 1 (highest priority) to 8 (lowest priority).
In systems type MSH, all pumps must be set to the same priority.
Different settings will be ignored.
The default setting is 1.
Operation with PFU 2000 EPROM Settings:
The default setting is 1.
3.1.13 GRUNDFOS BUS
The GRUNDFOS BUS protocol must be observed in the system
configuration, mainly if various controllers are connected via a
GRUNDFOS BUS.
Fig. 12
Possible number of pumps in a zone and on a BUS: 1 to 8.
Pump numbers in a zone or on a BUS: 1, 2, 3, 4, 5, 6, 7, 8.
Number of zones: 1 to 8.
Zone names: A, B, C, D, E, F, G, H.
It is possible to give the zones specific names.
Number of PFU 2000 units in a zone: 1 or 2.
Number of PFU 2000 units on a BUS: 1 to 8.
If more than one PFU 2000 are used in a zone, this must be taken
into account when setting the DIP switches in the PFU 2000.
If more than one booster set, e.g. three booster sets, are con-
nected via a GRUNDFOS BUS, the numbering of the pumps, i.e.
from 1 to 8, must be made on the GRUNDFOS BUS level.
For further information, see section
6.2.1 PFU 2000 DIP Switch Settings and
List of Control Parameters.
Zone A
4 Pumps
Zone B
3 Pumps
Zone C
1 Pump
Zone
Pump
Number
1234123 1
BUS
Pump
Number
1234567 8
PCU 2000
PMU 2000
PFU 2000
1234
ZONE A
PFU 2000
567
ZONE B
PFU 2000
8
ZONE C
no. 3no. 2no. 1
GRUNDFOS BUS
Example of Units Connected via GRUNDFOS BUS
TM00 2744 0294

13
3.2 Control Parameters
The display numbers mentioned in the following refer to the dis-
play overviews in section 13. Display Overviews.
The influence of the control parameters is described below.
The default settings and the actual settings are listed in the “List
of Control Parameters”.
3.2.1 Allocation of Pumps to Zone
The pumps in the system are organized in zones. The number of
pumps in a zone is set by means of the DIP switches in the PFU
2000 and will be applied by the PMU 2000.
If several units are connected via the GRUNDFOS BUS, the
GRUNDFOS BUS protocol must be observed.
For further information, see sections
3.1.13 GRUNDFOS BUS and
6.2.1 PFU 2000 DIP Switch Settings.
3.2.2 Zone Type / Control Parameter
Operation with PFU 2000 RAM / PMU 2000 Settings:
Zone type and control parameter will activate typical functions.
Only relevant displays will appear in the PMU 2000 display.
The zone type can be preset, but it will also be identified by the
PMU 2000 according to the units connected to the GRUNDFOS
BUS. The presetting will automatically be changed in case of de-
viation.
Example:
If the zone type has been preset to UPE (display 111) and a PFU
2000 is connected to the zone, the preset zone will automatically
be changed into PFU.
In the PMU 2000, the presetting can be made in the submenu
“presetting” (display 111) in the basic menu. Presettings are
made zonewise. In the presetting submenu, only zones to which
pumps have been allocated will appear.
The control parameter can only be selected in the presetting sub-
menu (display 111).
Possible control parameters for zone type PFU:
1. Differential pressure
2. Differential temperature
3. Flow-pipe and return-pipe temperatures
4. Flow
5. Level
6. Open loop
7. Pressure
8. Pressure with pre-pressure measuring
The control parameter is set in two steps:
• Select control parameter number.
• Select measuring unit (if the desired unit differs from the pre-
setting).
For further information, see section
3.2.7 Measuring Unit for Control Value.
When changes have been made or presetting has been activated,
all pumps will be switched off to enable further settings without
the pumps operating under unintended conditions.
For various applications, typical presettings have been made un-
der the presetting control parameter number. When a presetting
control parameter is activated, some of the control parameter val-
ues are changed accordingly. All other values are set to the de-
fault values.
Note: The activation of a presetting parameter overwrites actual
settings of a zone.
For pressure boosting systems, the control parameter is “pres-
sure” containing all typical functions.
3.2.3 Priority of Settings
If “Max.” and “Stop” are activated at the same time, the pumps
will operate according to the function with the highest priority.
Example:
If the pumps have been set to stop via the PMU 2000 and at the
same time to maximum operation in the PFU 2000, the pumps will
run in maximum operation because of the higher priority.
Priority
Possible Settings
PFU 2000 PMU 2000 PCU 2000
High Stop
Max.
Stop
Max.
Stop
Low Max.

14
3.2.4 Setpoint
Operation with PFU 2000 RAM / PMU 2000 Settings:
The maximum setpoint is set in “setpoint max.” (display 200).
This value is the upper limit of the setpoint and forms the basis of
the calculation of “setpoint act.” (display 401) which takes all set-
point influences into account. The product of “setpoint max.” and
all setpoint influences forms “setpoint act.”, which is the actual
setpoint according to which the closed-loop controller operates.
If the zone has been set to “local” (display 300), “setpoint max.”
can be set by means of the function selector in the PFU 2000.
“Setpoint max1” (display 222) will be activated if it is set to “on”
and the PFU 2000 input 4 contact is closed.
“Setpoint max1” functions like “setpoint max.”, but it cannot be in-
fluenced by the clock program.
The setting range of “setpoint max.” and “setpoint max1” is equal
to the measuring range of the actual transmitter.
Operation with PFU 2000 EPROM Settings:
The setpoint is set by means of the function selector in the PFU
2000 which has three positions, see fig. 13.
•“STOP”
All pumps are stopped and no setpoint is set. Fault indications
will be reset.
• “0% to 100%”
By means of the function selector the required pressure can
be set within the range from 0% to 100%. 100% corresponds
to the maximum value of the transmitter.
•“MAX”
The PFU 2000 starts all pumps at maximum performance. All
internal monitoring functions are active. Remotely set set-
points or external on/off are not active.
Fig. 13
100%0%
MAXSTOP
Setpoint
Function Selector in the PFU 2000
TM00 5217 2796
3.2.5 Setpoint Influences
Operation with PFU 2000 RAM / PMU 2000 Settings:
In order to optimize the operation of the system, it is often advan-
tageous to operate the system with a variable setpoint instead of
a constant setpoint. The selected setpoint influences reduce “set-
point max.” according to their settings.
More than one setpoint influence can be active simultaneously.
The influence types are described below. The product of all influ-
ences and “setpoint max.” forms “setpoint act.”.
For further information, see section
3.2.4 Setpoint.
Progressive = proportional (friction loss compensation):
If the system is to compensate for friction loss, this is possible by
selecting progressive influence.
When “progressive infl” is set to “on” (display 202), the pressure
will rise with an increasing flow. The actual flow is estimated ac-
cording to internal operating data without measuring the flow.
“Setpoint act.” will be increased linearly from the adjustable per-
centage at zero flow to 100% “setpoint act.” at maximum flow.
Maximum flow is the sum of the maximum flows of all the pumps
in the zone minus the standby pumps.
Fig. 14
Setpoint Influences via External Signals:
If “influence” is selected (display 217), it is important to set the re-
quired table value.
Fig. 15
The following external setpoint influences are possible:
•“off”
No setpoint influence table (clock program, progressive influ-
ence and remote control of setpoint via the PCU 2000 are pos-
sible).
• “extern” (%)
An external analog signal or potential-free contact on the PFU
2000 analog input 3 influences the setpoint in accordance with a
table.
With the PFU 2000 analog input 3 as a 0-10 V input and the set-
ting “extern” %, the input may be used as “remote on/off” for all
pumps which have not been defined as ‘not to be switched off’.
If the PFU 2000 input 3 contact is:
open = maximum value of the table.
closed = minimum value of the table.
Examples of application: Changeover to night-time duty or ana-
log setpoint control from a building management system.
Setpoint max
Q
H
100 %
60 %
Friction Loss Compensation
Set
p
oint max.
TM00 4991 4894
Set A
0 % ->STOP bar
Set A
50 % -> 1.5 bar
Set A
80 % -> 2.5 bar
Set A
100 % -> 6.0 bar
Example of Setpoint Influence Table

15
• “timer” (minutes)
An internal timer program in the PMU 2000 controls the set-
point in accordance with a table. This timer is started when the
contact on the PFU 2000 input 3 is closed.
The setting range is 0 to 200 minutes.
Application: Processes in which a time-controlled shape of the
setpoint must be achieved during a certain period.
•“TempTf”(°C,°F)
The flow-pipe temperature (measured on the PFU 2000
input 3) controls the setpoint in accordance with a table.
Examples of application: Heating and cooling systems.
• “Temp Tr” (°C, °F)
The return-pipe temperature (measured on the PFU 2000
input 3) controls the setpoint in accordance with a table.
Examples of application: Heating and cooling systems.
• “ Te m p To ” ( ° C, ° F )
The ambient temperature (measured on the PFU 2000 input 3)
controls the setpoint in accordance with a table.
Examples of application: Heating and cooling systems.
• “level” (m, cm, ft, in)
The level signal (PFU 2000 input 3) controls the setpoint in ac-
cordance with a table.
Examples of application: Water supply depending on cistern
level. Level control.
• “flow” (m3/h, l/h, l/s, gpm)
The flow signal (PFU 2000 input 3) controls the setpoint in ac-
cordance with a table.
Examples of application: Flow-dependent compensation of
pressure drop in water supply systems or differential pressure
drop compensation in circulation systems if a flow meter signal
is available.
Remote Control of Setpoint via a PCU 2000:
Via PCU 2000 inputs for the pumps connected to the zone and
the GRUNDFOS BUS, the setpoint may be controlled linearly to
the PCU 2000 input signal.
Operation with PFU 2000 EPROM Settings:
Setpoint Influences via External Signals:
The PFU 2000 input 3 can be connected to a 0-10 V signal for re-
mote setting of setpoint.
Fig. 16
The locally set setpoint is set by means of the function selector in
the PFU 2000, see fig. 13.
0 10 V
Locally set setpoint
100%
Current setpoint
Transmitter range
Setpoint via External Signals
Actual setpoint
Locally set setpoint
Transmitter range
TM00 7048 0296
3.2.6 On/Off Band
The on/off band (display 207) is the pressure above the actual
setpoint that is used to calculate the switch off levels for the
pumps.
Operation with PFU 2000 RAM / PMU 2000 Settings:
The default setting for the on/off band is 10% of the measuring
range of the signal transmitter.
Operation with PFU 2000 EPROM Settings:
The default setting for the on/off band is 10% of the measuring
range of the signal transmitter.
For further information, see section
3.1.4 Cascade Control.

16
3.2.7 Measuring Unit for Control Value
Operation with PFU 2000 RAM / PMU 2000 Settings:
If the signal transmitter used features a measuring unit different
from the one in the presetting, an alternative measuring unit can
be selected (display 213). The measuring unit selected will auto-
matically be changed in the relevant displays, but the measuring
range of the signal transmitter will not be converted automatically.
It is also important to convert and set the output signal as well as
minimum and maximum values of the signal transmitter operating
range (displays 219 and 220).
The following measuring units can be selected:
1. Differential pressure: m, Pa, ft, kPa.
2. Differential temperature: K, °F.
3. Temperature: °C, °F.
4. Flow: m3/h, l/h, l/s, gpm.
5. Level: m, cm, ft, in.
6. Open loop: %.
7. Pressure: bar, mbar, psi, kPa.
8. Pressure with pre-pressure
measuring: bar, mbar, psi, kPa.
Operation with PFU 2000 EPROM Settings:
See section 6.2.1 PFU 2000 DIP Switch Settings.
3.2.8 System Time
System time is an adjustable parameter to adapt the behaviour of
the controller to the hydraulic system (display 204). System time
is defined as the time that passes from a change in pump speed
is made until the measured value reaches approx. 70% of the cor-
responding final change.
Operation with PFU 2000 RAM / PMU 2000 Settings:
With the control parameter “pressure”, the recommended setting
is 2 secs.
A lower setting involves the risk of hunting.
A higher setting causes delays in reaching the setpoint.
The setting range is 0.4 to 800 secs.
Operation with PFU 2000 EPROM Settings:
The default setting is 2 secs.
Fig. 17
1. Final value after a jump in speed.
2. Actual value.
3. System time.
Time
H
3.
70%
100%
1.
2.
System Time
TM00 7992 2296
3.2.9 Minimum Switching Sequence
Minimum switching sequence is the time between two switchings
(on/off of pumps).
Operation with PFU 2000 RAM / PMU 2000 Settings:
To prevent hunting in the system and to limit pressure and current
surges, a minimum time between switching the individual pumps
on and off can be set (display 205).
The higher the set value (sec.), the bigger the risk of differences
between setpoint and actual value.
In order to avoid that the “actual value” exceeds “max. limit”, the
minimum switching time is temporarily set to 1 sec. if the actual
value exceeds the mean value between “setpoint max.” and
“max. limit”.
The setting range is 2 to 300 secs.
For further information, see section
3.1.4 Cascade Control.
Operation with PFU 2000 EPROM Settings:
The default setting is 5 secs.
3.2.10 Medium Switching Sequence
Medium switching sequence is the time that describes the maxi-
mum number of switchings (on/off of pumps) per hour under nor-
mal conditions.
Operation with PFU 2000 RAM / PMU 2000 Settings:
This setting is only possible on service code level.
In case of frequent starts and stops, this function prolongs the op-
erating time of the pump in order not to exceed the permissible
number of switchings.
The medium switching time (sec.) to be set is calculated as
3600 s/permissible maximum number of switchings per hour.
Unnecessarily high settings may result in differences between
setpoint and actual value. This can be avoided by accepting more
frequent pump changes.
In order to avoid that the “actual value” exceeds “max. limit”, the
medium switching time is temporarily set to 1 sec. if the actual
value exceeds the mean value between “setpoint max.” and
“max. limit”.
If the medium switching time is effective with a mains-operated
pump in operation, the actual value may exceed the setpoint set.
The setting range is 2 to 300 secs.
For further information, see section
3.1.4 Cascade Control.
Operation with PFU 2000 EPROM Settings:
The default setting is 5 secs.

17
3.2.12 PFU 2000 Analog Input 1 Configuration
The PFU 2000 analog input 1 value is the measured value in the
system. The PFU 2000 receives a signal from the signal transmit-
ter installed. The evaluation of the input signal depends on the
setting of the control parameter, the transmitter measuring range
and the measuring unit of the actual value.
In the wiring diagram and the PFU 2000 EPROM default settings,
a 4-20 mA pressure measuring signal has been applied.
The necessary hardware configuration is described in section
6.2.1 PFU 2000 DIP Switch Settings.
3.2.13 PFU 2000 Analog Input 2 Configuration
The PFU 2000 analog/digital input 2 is only used for pre-pressure
measuring (only for control parameter “pressure with pre-pres-
sure measuring”).
A digital signal (potential-free contact NC or NO) or the following
analog signals can be connected and evaluated: 0-10 V, 0-20 mA
or 4-20 mA.
The necessary hardware configuration is described in section
6.2.1 PFU 2000 DIP Switch Settings.
3.2.14 PFU 2000 Analog Input 3 Configuration
The PFU 2000 analog input 3 receives a setpoint influence signal
in accordance with the setting in “setp. influence” (display 202).
The necessary hardware configuration is described in section
6.2.1 PFU 2000 DIP Switch Settings.
The default function of the PFU 2000 analog input 3 without a
PMU 2000 is “extern” in % (linearly from 0% to 100%).
For further information, see section
3.2.5 Setpoint Influences.
3.2.11 Control Function
Operation with PFU 2000 RAM / PMU 2000 Settings:
The “control function” (display 214) determines how the system is
to react to any difference between the actual value and the set-
point set.
The following control functions are possible:
•“normal”
If the actual value is lower that the setpoint, the pump perform-
ance will be increased (the controller amplifies the output sig-
nal).
•“invers”
If the actual value is lower than the setpoint, the pump per-
formance will be reduced (the controller diminishes the output
signal).
Dependent on the control parameter selected, the required con-
trol function is as follows:
“Normal” is required for the control parameters “pressure”, “differ-
ential pressure”, “flow” and “level” (filling).
“Invers” is required for the control parameters “differential tem-
perature” and “level” (draining).

18
• “reduced op” (reduced operation)
When the PFU 2000 input 4 contact is closed, the pumps
which have not been set to reduced operation will be switched
off, i.e. the system performance is reduced to the number of
pumps set to reduced operation.
Examples of application: Reduced power supply with an emer-
gency power set. Reduced permissible water consumption in
case of limited source capacity.
For further information, see section
3.1.11 Reduced Operation.
• “setpoint max1”
When the PFU 2000 input 4 contact is closed, “setpoint max1”
will be activated.
• “fire fight”
This function is only available with control parameters “pres-
sure” and “pressure with pre-pressure measuring”.
When the PFU 2000 input 4 contact is opened, “setpoint
max1” will be activated. At least one pump is started. The wa-
ter shortage monitoring function is suppressed.
•“flowswitch”
This function is only available with control parameters “pres-
sure” and “pressure with pre-pressure measuring”.
The pumps will be stopped when the PFU 2000 input 4 contact
is opened and the actual pressure is higher than the setpoint
set.
Operation with PFU 2000 EPROM Settings:
The default setting is “remote on/off”.
3.2.16 Ramp Time
Operation with PFU 2000 RAM / PMU 2000 Settings:
The ramp time is the time needed to change the setpoint factor
from 0 to 1 and vice versa.
If the PFU 2000 input 4 has been set to “ramp 2 pt” or
“ramp 3 pt” (display 222), the ramp time must be set (display
223).
The setting range is 1 to 99 minutes.
The default setting is 10 minutes.
Fig. 20
Setp. act.
Ramp time Time
Max
Ramp Time
TM00 5006 4894
3.2.15 PFU 2000 Input 4 Configuration
The PFU 2000 digital input 4 can be used for external control of
the zone. Only one function per zone can be selected.
Operation with PFU 2000 RAM / PMU 2000 Settings:
The default setting is “off”.
The following functions are possible (display 222):
•“off”
Input 4 has no function.
• “remote on/off”
When the PFU 2000 input 4 contact is opened, all pumps are
switched off.
• “ramp 2 pt” (two-point control of setpoint)
When the PFU 2000 input 4 contact is closed, the setpoint will
drop linearly in accordance with the set “ramp time” (display
223).
When the contact is opened, the setpoint will rise linearly in
accordance with the set “ramp time” (display 223).
The default setting is “setpoint act.”.
Fig. 18
• “ramp 3 pt” (three-point control of setpoint)
The PFU 2000 input 2 is used for this function together with in-
put 4. The function “ramp 3 pt” is not possible with control pa-
rameters using the PFU 2000 input 2.
When the PFU 2000 input 4 contact is closed, the setpoint will
drop linearly in accordance with the set “ramp time” (display
223).
When the PFU 2000 input 2 contact is closed, the setpoint will
rise linearly in accordance with the set “ramp time” (display
223).
When the PFU 2000 input 2 and PFU 2000 input 4 contacts
are opened, the setpoint will be kept constant.
When both contacts are closed, the setpoint will drop linearly
by a factor of 1 to 0 in accordance with the set “ramp time”.
The default setting is “setpoint act.”.
Fig. 19
Setp. act.
Ramp time Time
100%
Two-Point Control of Setpoint
TM00 5004 4894
Setp. act.
Ramp time Time
100%
Three-Point Control of Setpoint
TM00 5005 4894

19
3.2.19 Minimum Limit
Operation with PFU 2000 RAM / PMU 2000 Settings:
This setting defines the minimum limit at which the system is to
indicate a fault.
Examples of application: Elimination of operation in unintended
operating points. Detection of pipe bursts.
The setting range is from 0 to the maximum value of the transmit-
ter measuring range (display 229). If the value is set to 0, no fault
will be indicated.
The default setting is 0.
Operation with PFU 2000 EPROM Settings:
The default setting is 0.
For further information, see section,
7.3.4 Minimum Limit of Actual Value.
Fig. 23
3.2.20 Operation at Minimum Limit
Operation with PFU 2000 RAM / PMU 2000 Settings:
If this function is set to “on” (display 230), no pumps will be
switched off at “min.limit operation”, but a fault is indicated.
If this function is set to “off” (display 230), the pump/pumps is/are
switched off at “min.limit operation” and a fault is indicated.
The default setting is “on”.
3.2.21 Minimum Pre-Pressure
Operation with PFU 2000 RAM / PMU 2000 Settings:
If pre-pressure measuring is set to “on” (display 216), the setting
of minimum pre-pressure (display 231) defines the value for the
water shortage fault indication.
The default setting is 0.
Operation with PFU 2000 EPROM Settings:
The default setting is 5% of the transmitter measuring range.
3.3 Pump Parameters
Operation with PFU 2000 RAM / PMU 2000 Settings:
These settings are only possible on service code level.
The control functions take “maximum head” and “start time” for
each pump into account.
The operating hours are counted.
The settings are listed in the “List of Control Parameters”.
Min. limit
Q
set
H
H
Minimum Limit
TM00 8297 2596
3.2.17 Minimum Pump Speed Limit
Operation with PFU 2000 RAM / PMU 2000 Settings:
Minimum pump speed limits the lowest operating point. The value
is set in the setting menu.
The setting range is 0% to 100%.
100% is equal to the performance of one full-size pump.
50% is equal to the performance of one half-size pump.
If the minimum speed setting is higher than 0, the on/off mode is
avoided.
The default setting is 0.
Operation with PFU 2000 EPROM Settings:
The default setting is 0.
Fig. 21
1. Minimum pump speed limit.
2. Operating range.
3.2.18 Maximum Limit (Overpressure)
Operation with PFU 2000 RAM / PMU 2000 Settings:
This setting defines the maximum limit at which the system is to
indicate a fault.
In pressure boosting systems with control parameter “pressure”,
it is overpressure.
The setting range is from 0 to the maximum value of the transmit-
ter measuring range (display 228). If the value is set to the maxi-
mum of the measuring range, no fault will be indicated.
The default setting in the PMU 2000 is the maximum value of the
measuring range – 1 digit.
Operation with PFU 2000 EPROM Settings:
The default setting is the maximum value of the transmitter meas-
uring range – 1 digit.
For further information, see section
7.3.3 Maximum Limit of Actual Value.
Fig. 22
0
100%
2
1
Minimum Pump Speed Limit
TM00 8298 2596
Max. limit
Q
set
H
H
Maximum Limit
TM00 8296 2596

20
4.1 Location
The booster sets Hydro 2000 S must be installed in a well venti-
lated room. Hydro 2000 S is not suitable for outdoor installation.
The booster set should be placed with a 1 metre clearance in
front and on the two sides.
Use a fork-lift truck to move the booster set. It is shown on the
booster set where it can be lifted.
4.2 Hydraulic Installation
Arrows on the pump base show the direction of flow of water
through the pump.
The pipes connected to the booster set must be of adequate size.
To avoid resonance, expansion joints should be fitted in the dis-
charge and suction pipes, see fig. 25.
The pipes are connected to the manifolds of the booster set.
Either end can be used. Apply sealing compound to the unused
end of the manifold and fit the screw cap. For manifolds with
flanges, a blind flange with gasket must be fitted.
The booster set should be tightened up prior to start-up.
If booster sets are installed in blocks of flats or the first consumer
on the line is close to the booster set, it is advisable to fit pipe
hangers on the suction and discharge pipes to prevent vibration
being transmitted through the pipework, see fig. 25.
The booster set should be positioned on a plane and solid sur-
face, e.g. a concrete floor or foundation. If the booster set is not
fitted with vibration dampers, it must be bolted to the floor or foun-
dation.
The pipes must be fastened to parts of the building to ensure that
they cannot move or be twisted.
Fig. 25
1. Expansion joint.
2. Pipe hanger.
Expansion joints, pipe hangers and vibration dampers shown in
fig. 25 are not included in the standard booster set.
4.3 Electrical Connection
The connection of electricity supply, transmitters and external
monitoring equipment must be carried out by an authorized elec-
trician in accordance with local regulations and the relevant wir-
ing diagram.
Make sure that the Control 2000 S and the pumps are suitable for
the electricity supply on which they will be used. Pay special at-
tention to “Important Notes” in the wiring diagram.
If the motors cannot be seen from the control box, they must be
fitted with a repair switch.
For further information, see section
11.4 Electrical Data.
2
2
11
2
TM00 7748 1996
3.3.1 Maximum Head
Operation with PFU 2000 RAM / PMU 2000 Settings:
This setting is only possible on service code level.
The maximum head Hois the head at maximum speed and
flow = 0. It influences the calculation of the speed settings during
switching and pump change processes (display 232).
Pump head = discharge pressure – pre-pressure.
If the pre-pressure is not measured, it is set to zero in the for-
mula.
The value must be set according to the Hostated on the pump
nameplate.
The setting range is 0 to the maximum value of the measuring
range of the relevant analog input.
The default setting is the maximum value of the measuring range
of the relevant analog input.
Operation with PFU 2000 EPROM Settings:
The default setting is the higher value of:
• setpoint max. + 10% of setpoint or
• setpoint max. + 5% of transmitter measuring range.
3.3.2 Operating Hours
Operation with PFU 2000 RAM / PMU 2000 Settings:
The operating hours are counted for each pump when operating.
When a pump is replaced, the operating hours for the pump can
be changed (display 233).
3.3.3 Start Time
Operation with PFU 2000 RAM / PMU 2000 Settings:
This setting is only possible on service code level.
The “start time” is the time a pump needs to run up to maximum
speed after having been started. The value is set in the setting
menu.
This parameter is used to calculate the timing of speed settings
when a pump is stopped and during pump change.
The setting range is 0 to 100 secs. in steps of 0.1 sec.
The default setting is 1.0 sec.
Operation with PFU 2000 EPROM Settings:
The default setting is 1.0 sec.
Fig. 24
1. Maximum speed.
2. Start time.
4. Installation
The installation and operation should be in accord-
ance with local regulations and accepted codes of
good practice.
Time
Speed
2.
1.
Start Time
TM00 8031 2396