Grundfos Hydro Multi-E User manual

Hydro Multi-E
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions
These installation and operation instructions apply to the
Grundfos Hydro Multi-E booster systems.
CONTENTS
Page
1. Symbols used in this document
1.1 Warnings against hazards involving risk of death
or personal injury
The text accompanying the three hazard symbols DANGER,
WARNING and CAUTION is structured in the following way:
1.2 Other important notes
1. Symbols used in this document 2
1.1 Warnings against hazards involving risk of death or
personal injury 2
1.2 Other important notes 2
2. Scope of these instructions 3
3. System sizing 3
4. Product description 3
4.1 General description 3
4.2 Functions 3
4.3 Hydro Multi-E 3
5. Identification 3
5.1 Nameplate 3
6. Type key 4
7. Operating conditions 5
7.1 Temperatures 5
7.2 Installation altitude 5
7.3 Relative humidity 5
7.4 Maximum operating pressure 5
7.5 Shaft seal run-in 5
7.6 Minimum inlet pressure 5
7.7 Maximum inlet pressure 6
7.8 Minimum flow rate 6
7.9 Start and stop 6
7.10 Diaphragm tank 6
8. Installation 6
8.1 Location 6
8.2 Mechanical installation 6
8.3 Electrical installation 7
8.4 Mains supply 7
8.5 Additional protection 8
9. Startup 8
9.1 Hydro Multi-E in system with positive inlet pressure 8
9.2 Hydro Multi-E in system without inlet pressure 9
10. Operating modes 10
10.1 Normal operation 10
10.2 Stop or Max. operation 10
10.3 Operating condition in case of disconnection of power
supply 10
10.4 Further settings 10
11. User interfaces 10
11.1 Standard control panel 10
12. Grundfos GO Remote 12
12.1 Communication 12
12.2 Menu overview for Grundfos GO Remote 13
13. Multi-master function 14
13.1 Systems with one outlet-pressure sensor 14
13.2 Systems with two or more outlet-pressure sensors 14
14. Protective functions 14
14.1 Dry-running protection 14
15. Bus signal 16
16. Priority of settings 16
17. Grundfos Eye 17
18. Signal relays 18
19. Digital input 19
20. Data communication 19
21. Insulation resistance 19
22. Maintenance 19
22.1 Pumps 19
22.2 Motors 19
22.3 Breaker cabinet 19
23. Shutdown 19
23.1 Frost protection 19
23.2 Service kits 19
24. Fault finding 20
25. Technical data, Hydro Multi-E with single-phase
pumps 21
25.1 Supply voltage 21
25.2 Leakage current 21
26. Technical data, Hydro Multi-E with three-phase
pumps 21
26.1 Supply voltage 21
26.2 Leakage current 21
27. Inputs and outputs 21
28. Other technical data 22
29. Sound pressure level 22
29.1 Hydro Multi-E with single-phase pumps 22
29.2 Hydro Multi-E with three-phase pumps 22
30. Disposal 22
Prior to installation, read this document. Installation
and operation must comply with local regulations and
accepted codes of good practice.
DANGER
Indicates a hazardous situation which, if not avoided,
will result in death or serious personal injury.
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious personal injury.
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate personal injury.
SIGNAL WORD
Description of hazard
Consequence of ignoring the warning.
- Action to avoid the hazard.
A blue or grey circle with a white graphical symbol
indicates that an action must be taken.
A red or grey circle with a diagonal bar, possibly with
a black graphical symbol, indicates that an action
must not be taken or must be stopped.
If these instructions are not observed, it may result in
malfunction or damage to the equipment.

English (GB)
3
2. Scope of these instructions
These installation and operating instructions apply to the
Grundfos Hydro Multi-E booster systems.
Hydro Multi-E is a range of factory-assembled booster systems,
ready for installation and operation.
3. System sizing
4. Product description
4.1 General description
The Grundfos Hydro Multi-E booster systems are designed for
pressure boosting of clean water in blocks of flats, hotels,
hospitals, schools, etc.
Hydro Multi-E incorporates Grundfos CRE, CRIE, CME-A or
CME-I pumps with integrated frequency-controlled single- or
three-phase MGE motors and a breaker cabinet.
The system maintains a constant pressure through continuous
variable adjustment of the speed of the pumps connected.
The system adjusts its performance to the demand by cutting the
required number of pumps in or out and by parallel control of the
pumps in operation.
The system has been factory-assembled and tested with the
control parameters mentioned in the quick guide supplied with the
booster system.
4.2 Functions
Hydro Multi-E offers the following functions:
• multi-master function
• constant pressure
• redundant sensor
• stop at low flow
• cascade control of pumps
• automatic alternation
• pipe filling
• limit-exceeded function
• two digital inputs
• two digital outputs
• two analog inputs
• optional bus communication via Grundfos CIM modules.
4.3 Hydro Multi-E
Fig. 1 Hydro Multi-E components
The breaker cabinet incorporates a main switch and circuit
breakers.
5. Identification
5.1 Nameplate
Fig. 2 Hydro Multi-E nameplate
Tips and advice that make the work easier.
The system in which Hydro Multi-E is incorporated
must be designed for the maximum pump pressure.
TM02 4280 1902TM06 7460 3516
Pos. Description
1 Type designation
2 Model
3 Serial number
4 Supply voltage
5 Maximum operating pressure in bar
6 Liquid temperature
7 Enclosure class
8 Weight in kg
9 Country of origin
10 Company logo
11 Maximum flow rate in m3/h
12 Nominal head in metres
13 Approval mark
14 Approval mark
15 QR code
Pump Non-return
valve
Outlet-pressure
sensor
Pressure
gauge
Isolating
valve
Diaphragm tank Breaker cabinet
Pressure
switch
MADE IN GERMANY
DK - 8850 - Bjerringbro - Denmark
QR
code
IP Class: IP54
Weight: 83kg
Liq. temp.: 5-60ºC
pMax: 16 bar Q Nom / Max: 14 / 20 m /h
H Nom / Max: 68 / 93 m
3
Mains supply: 3 x 380 - 415
Serial No.: -
Model: 98486745
Type: Hydro Multi-E 2 CRIE 5-9 U2 A-A-A-A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

English (GB)
4
6. Type key
Example Hydro Multi -E 2 CRIE 15-3 U7 A- A- A- A- ABCDEF
Name
System type
E: All pumps with E-motor
Number of main pumps
Pump type
Voltage code
U1: 3 x 380-415, N, PE, 50/60 Hz (three phase system with single-phase pumps)
U2: 3 x 380-415, PE, 50/60 Hz
U7: 1 x 200-240, PE, 50/60 Hz
U8: 1 x 200-240, N, PE, 50/60 Hz
UX: CSU variant (special voltage rating)
Design
A: Systems with breaker cabinet mounted on the system
B: Systems with wall mounted breaker cabinet and 5 m power supply cable
C: Systems with breaker cabinet mounted on the left side.
Starting method
A: E, variable frequency, VFD
Material combination
A: Stainless steel manifold, base frame and standard valves
B: Stainless steel manifold, base frame and valves
C: Galvanised steel manifold, base frame and standard valves (CME-A pumps only)
G: Galvanised steel manifold, base frame and standard valves
P: Stainless steel manifold, galvanised steel base frame and standard valves
Drinking water approvals
A: ACS-approved components
B: Belgaqua-approved components
D: DVGW-approved components
K: KIWA-approved components
N: NFS-approved components
V: WRAS-approved components
W: WRAS-approved system
Y: No special approval
Options
A: Standard hydraulics
B: No redundant outlet-pressure sensor
C: Outlet-pressure sensor on each pump
D: Sensor as dry-running protection
E: No dry-running protection
F: Level switch as dry-running protection
G: CIM module included
K: No inlet manifold
L: Non-return valves on the inlet side
S: CSU variant
U: Undersized motor
X: More than four options

English (GB)
5
7. Operating conditions
7.1 Temperatures
7.1.1 Ambient temperature during storage and transportation
Minimum -30 °C
Maximum +60 °C.
7.1.2 Ambient temperature during operation
Minimum -20 °C
Maximum +50 °C.
The motors can operate with the rated output power (P2) at 50
°C, but continuous operation at higher temperatures will reduce
the expected product life. If the motors are to operate at ambient
temperatures between 50 and 60 °C, oversized motors must be
selected. Contact Grundfos for further information.
7.1.3 Liquid temperature
0 to +60 °C.
7.2 Installation altitude
Installation altitude is the height above sea level of the installation
site.
• Motors installed up to 1000 metres above sea level can be
loaded 100 %.
• Motors installed more than 1000 metres above sea level must
not be fully loaded due to the low density and consequent low
cooling effect of the air. See fig. 3.
Fig. 3 Derating of motor output power (P2) in relation to
altitude above sea level
7.3 Relative humidity
Maximum 95 %.
7.4 Maximum operating pressure
See system nameplate.
7.5 Shaft seal run-in
The seal faces are lubricated by the pumped liquid, meaning that
there may be a certain amount of leakage from the shaft seal.
When the pump is started up for the first time, or when a new
shaft seal is installed, a certain run-in period is required before
the leakage is reduced to an acceptable level. The time required
for this depends on the operating conditions, that is every time
the operating conditions change, a new run-in period will be
started.
Under normal conditions, the leaking liquid evaporates. As a
result, a leakage will not be detected.
7.6 Minimum inlet pressure
Fig. 4 Parameters for the calculation of minimum inlet
pressure
The minimum inlet pressure "H" in metres head required to avoid
cavitation in the pumps can be calculated as follows:
Hydro Multi-E with CME pumps
Hydro Multi-E systems with CME pumps always require a positive
inlet pressure, both during startup and operation.
Do not install the motors more than 2000 metres
above sea level.
TM05 6400 4712
1
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0.90
0.89
0.88
0
0
1000 1200 1400 1600 1800 2000 2200
[m]
P2
[%]
Altitude [m]
P2
[%]
TM02 0118 3800
H = pb x 10.2 - NPSH - Hf - Hv - Hs
pb = Barometric pressure in bar. Barometric pressure can
be set to 1 bar.
In closed systems, pbindicates the system pressure in
bar.
NPSH = Net Positive Suction Head in metres head
The NPSH value can be read from the NPSH curve at
the highest flow which the individual pump will be
delivering.
Hf = Friction loss in inlet manifold in metres head at the
highest flow the individual pump will be delivering.
Note: If a non-return valve is installed on the inlet side
of the pump, the friction loss in the valve must be
added. See the manufacturer's data.
Hv = Vapour pressure in metres head.
Hs = Safety margin of min. 0.5 metres head.
In some regions, the booster system is available with
a low inlet manifold which makes it more suitable for
suction lift operation. Contact Grundfos for further
information.
Hv
HNPSH
Pb
Hf
Hf
Hpb
Hv
NPSH

English (GB)
6
Example
This means that each pump can operate at a suction lift of
maximum 2.8 metres head.
Pressure calculated in bar: 2.8 x 0.0981 equal to 0.27.
Pressure calculated in kPa: 2.8 x 9.81 equal to 27.4.
7.7 Maximum inlet pressure
The maximum inlet pressure must not exceed 8 bar. However, the
actual inlet pressure plus pressure when the pump is operating
against a closed valve must always be lower than the maximum
operating pressure.
7.8 Minimum flow rate
Due to the risk of overheating, the pumps should not be used at
flow rates below 10 % of the rated flow rate of one pump.
7.9 Start and stop
The system must not be started and stopped via the power supply
more than four times per hour.
When the system is switched on via the power supply, it will start
after approx. 5 seconds.
7.10 Diaphragm tank
The diaphragm tank precharge pressure must be set to 0.7 x
setpoint.
If the setpoint is changed, the diaphragm tank precharge
pressure should be changed accordingly to ensure optimum
operation.
We recommend that you use nitrogen gas for precharging.
8. Installation
8.1 Location
Observe the following to ensure adequate cooling of motor and
electronics:
• Position Hydro Multi-E in such a way that adequate cooling is
ensured.
• Keep motor cooling fins and fan blades clean.
Hydro Multi-E is not suitable for outdoor installation.
The booster system must have a 1-metre clearance in front and
on the two sides.
8.2 Mechanical installation
Arrows on the pump base show the direction of flow of water
through the pump.
The pipes connected to the booster system must be of adequate
size. Fit expansion joints in the inlet and outlet pipes to avoid
resonance. See fig. 5.
Connect the pipes to the manifolds of the booster system.
The manifold comes with a screw cap fitted to one end. If this end
is to be used, remove the screw cap, apply sealing compound to
the other end of the manifold, and fit the screw. Fit a blanking
flange with gasket on flanged manifolds.
Tighten up the booster system prior to startup.
If booster systems are installed in blocks of flats or the first
consumer on the line is close to the booster system, we
recommend that you fit pipe hangers on the inlet and outlet pipes
to prevent vibration being transmitted through the pipes. See fig.
5.
Position the booster system on a plane and solid surface, for
example a concrete floor or foundation. If the booster system is
not fitted with vibration dampers, it must be bolted to the floor or
the foundation.
Fasten the pipes to parts of the building to ensure that they
cannot move or be twisted.
Fig. 5 Installation example with expansion joints and pipe
supports
The expansion joints and pipe supports shown in fig. 5are not
included in the standard booster system.
pb = 1 bar.
Pump type = CRE 15, 50 Hz.
Flow rate = 15 m3/h
NPSH
(from page 23) = 1.2 metres head.
Hf = 3.0 metres head.
Liquid
temperature = +60 °C.
Hv
(from page 24) = 2.1 metres head.
H = pb x 10.2 - NPSH - Hf - Hv - Hs [metres head].
H = 1 x 10.2 - 1.2 - 3.0 - 2.1 - 0.5 equal to 2.8
metres head.
The pumps must not run against a closed outlet
valve.
Measure the precharge pressure while the system is
pressureless.
TM00 7748 1996
Pos. Description
1 Expansion joint
2 Pipe supports
2
2
11
2

English (GB)
7
8.3 Electrical installation
Carry out the electrical connection according to local regulations.
Check that the supply voltage and frequency correspond to the
values stated on the nameplate.
If the power supply cable is damaged, it must be replaced by the
manufacturer, the manufacturer's service partner or a similarly
qualified person.
The user or the installer is responsible for the installation of
correct earthing and protection according to local regulations. All
operations must be carried out by a qualified electrician.
The booster system must be stationary and installed permanently.
Furthermore, connect the booster system permanently to the
power supply.
Carry out the earth connection as duplicate conductors.
If the system cannot be installed with the supply disconnecting
device located minimum 0.6 m above service level according to
EN 60204-1 paragraph 5.3.4, install the system with an external
"supply disconnecting device" made according to EN 60204-1,
paragraph 5.3.2. The system must be provided with a means
permitting it to be locked in OFF (isolated) position.
8.3.1 Protection against electric shock, indirect contact
Protective-earth conductors must always have a yellow and
green (PE) or yellow, green and blue (PEN) colour marking.
Protection against mains voltage transients
The motor is protected against mains voltage transients in
accordance with EN 61800-3.
Motor protection
The motor requires no external motor protection. The motor
incorporates thermal protection against slow overloading and
blocking.
8.4 Mains supply
Check that the supply voltage and frequency correspond to the
values stated on the nameplate.
The wires in the breaker cabinet must be as short as possible.
Excepted from this is the separated earth conductor which must
be so long that it is the last one to be disconnected in case the
cable is inadvertently pulled out of the cable entry.
For maximum backup fuse, see section 25.1 Supply voltage.
Fig. 6 Example of a mains-connected Hydro Multi-E with
backup fuses and additional protection (applies only
for systems with single-phase motors)
For maximum backup fuse, see section 26.1 Supply voltage.
Fig. 7 Example of a mains-connected Hydro Multi-E with
backup fuses and additional protection (applies only
for systems with three-phase motors)
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply and wait at least five
minutes before you make any connections in the
breaker cabinet or terminal boxes. Make sure that
the power supply cannot be accidentally switched
on.
- Connect the motor to protective earth and protect
against indirect contact according to local
regulations.
WARNING
Electric shock
Death or serious personal injury
- Connect the motor to protective earth and protect
against indirect contact according to local
regulations.
Use dedicated IT network motors if the booster
system is supplied through an IT network. Contact
Grundfos.
TM02 4547 4211TM02 4546 4211
ELCB
(GFCI)
Breaker cabinet
Installation in building
ELCB
(GFCI)
Breaker cabinetInstallation in building

English (GB)
8
8.5 Additional protection
8.5.1 Systems with single-phase motors
If Hydro Multi-E is connected to an electric installation where an
earth leakage circuit breaker (ELCB) or ground fault circuit
interrupter (GFCI) is used as additional protection, this circuit
breaker or interrupter must be marked with the following symbol:
The leakage current of Hydro Multi-E can be found in section
25.2 Leakage current.
8.5.2 Systems with three-phase motors
If Hydro Multi-E is connected to an electric installation where an
earth leakage circuit breaker (ELCB) or ground fault circuit
interrupter (GFCI) is used as additional protection, this circuit
breaker or interrupter must be of the following type:
• It must be suitable for handling leakage currents and cutting-in
with short pulse-shaped leakage.
• It must trip when alternating fault currents and fault currents
with DC content, i.e. pulsating DC and smooth DC fault
currents, occur.
For these systems an earth leakage circuit breaker or ground
fault circuit interrupter, type B, must be used.
This circuit breaker or interrupter must be marked with the
following symbols:
The leakage current of Hydro Multi-E can be found in section
26.2 Leakage current.
Protection against phase unbalance
The motors must be connected to a power supply with a quality
corresponding to IEC 60146-1-1, class C, to ensure correct motor
operation at phase unbalance.
This also ensures long life of the components.
9. Startup
9.1 Hydro Multi-E in system with positive inlet
pressure
When you have carried out the mechanical and electrical
installation described in section 8. Installation, proceed as
follows:
1. Check that Hydro Multi-E corresponds to order and that no
single parts have been damaged.
2. Switch off the power supply with the main switch.
3. Switch off the circuit breakers of all pumps.
4. Check that the precharge pressure in the diaphragm tank is
0.7 times the required outlet pressure (setpoint).
5. Connect water and power supplies to the system.
6. Open all pump inlet and outlet valves.
7. Vent all pumps by means of the vent screws.
Fig. 8 Position of vent screws in systems with CME-A/-I
pumps
When an earth leakage circuit breaker or ground
fault circuit interrupter is selected, the total leakage
current of all the electrical equipment in the
installation must be taken into account.
When an earth leakage circuit breaker or ground
fault circuit interrupter is selected, the total leakage
current of all the electrical equipment in the
installation must be taken into account.
ELCB
(GFCI)
ELCB
(GFCI)
Do not start the pumps until they have been filled
with liquid.
Measure the precharge pressure while the system is
pressureless.
TM05 2008 4211
Vent screws

English (GB)
9
Fig. 9 Position of vent screws in systems with CR(I)E pumps
8. Switch on the power supply with the main switch.
9. Start pump 1 by pressing the start/stop button on the pump
control panel.
10. Vent pump 1 by means of the vent screw.
11. Repeat steps 9 and 10 for the other pumps in the system.
12. Set the desired outlet pressure.
13. Check that the pumps are cutting in and out, thus adjusting
the performance to the demand.
Hydro Multi-E is now in automatic mode and ready for operation.
9.2 Hydro Multi-E in system without inlet pressure
When you have carried out the mechanical and electrical
installation described in section 8. Installation, proceed as
follows:
1. Check that Hydro Multi-E corresponds to order and that no
single parts have been damaged.
2. Switch off the power supply with the main switch.
3. Switch off the circuit breakers of all pumps.
4. Check that the precharge pressure in the diaphragm tank is
0.7 times the required outlet pressure (setpoint).
5. Connect water and power supplies to the system.
6. Open all pump inlet valves.
7. Close all pump outlet valves, and prime all pumps and the
inlet pipe.
Fig. 10 Position of vent screw and filling screw
8. Switch on the power supply with the main switch.
9. Start pump 1 by pressing the start/stop button on the pump
control panel.
10. Vent pump 1 by means of the vent screw.
11. Slowly open the outlet valve approximately 50 %.
12. Repeat steps 9 and 11 for the other pumps in the system.
13. Slowly fully open all pump outlet valves.
14. Wait for a few minutes.
15. Set the desired outlet pressure.
16. Check that the pumps are cutting in and out, thus adjusting
the performance to the demand.
Hydro Multi-E is now in automatic mode and ready for operation.
TM05 2009 1717
If you change the outlet pressure, change the
diaphragm tank precharge pressure accordingly.
Hydro Multi-E systems with CME pumps require a
positive inlet pressure during startup and operation.
The following startup procedure therefore only
applies to Hydro Multi-E systems with CRE or CRIE
pumps.
Measure the precharge pressure while the system is
pressureless.
Vent screws
TM05 2009 1717
If you change the outlet pressure, change the
diaphragm tank precharge pressure accordingly.
Vent screw
Filling screw

English (GB)
10
10. Operating modes
The operating modes are the operating conditions that the
booster system can be brought in by the user.
Possible operating modes:
•Stop
All pumps stopped.
• Normal (factory setting)
One or more pumps are operating to maintain the set
pressure.
•Max.
All pumps running at maximum speed.
The operating modes can be selected on the control panel, with
Grundfos GO Remote or via bus.
10.1 Normal operation
Fig. 11 Hydro Multi-E in normal operation, i.e.
constant-pressure mode
In constant-pressure mode, Hydro Multi-E adjusts its
performance to the desired setpoint.
10.2 Stop or Max. operation
In addition to normal operating mode, you can select the
operating mode "Stop" or "Max.". See the example in fig. 12.
Fig. 12 Hydro Multi-E in operating mode "Max."
Max. operation can for instance be used in connection with the
venting and startup procedures.
10.3 Operating condition in case of disconnection of
power supply
If the power supply to Hydro Multi-E is disconnected, the settings
will be stored. The Hydro Multi-E will restart in the same
operating condition as it was in before the disconnection.
10.4 Further settings
You can make further settings with Grundfos GO Remote. See
section 12. Grundfos GO Remote.
11. User interfaces
Settings can be made by means of the following user interfaces:
• Standard control panel.
See section 11.1 Standard control panel.
• Grundfos GO Remote.
See section 12. Grundfos GO Remote.
If the power supply is switched off, the settings will be stored.
11.1 Standard control panel
Fig. 13 Standard control panel
TM02 4328 0602TM02 4318 0602
Q
H
set
H
Hset
Q
H
Max.
WARNING
Hot surface
Death or serious personal injury
- Only touch the buttons on the display as the
product may be very hot.
TM05 4848 3512
Pos. Symbol Description
1
Grundfos Eye
Shows the operating status of the individual
pump.
See section 17. Grundfos Eye for further
information.
2 - Light fields for indication of setpoint.
3Changes the setpoint and resets alarms
and warnings.
4
Enables radio communication with
Grundfos GO Remote and other products of
the same type.
5
Makes the pump ready for operation or
starts and stops the pump.
Start:
If the button is pressed when the pump is
stopped, the pump will only start if no other
functions with higher priority have been
enabled. See section 16. Priority of
settings.
Stop:
If the button is pressed when the pump is
running, the pump will always be stopped.
When the pump is stopped via this button,
the "Stop" text next to the button will
illuminate.
1
2
3
4
5
Stop