Wilo STRATOS GIGA User manual

en Installation and operating instructions
fr Notice de montage et de mise en service
es Instrucciones de instalación y funcionamiento
Wilo-Stratos GIGA
2 122 060-Ed.01/2011-06 Wilo

Fig. 1: IF-Modul
Fig. 2:
1O
1O
OS
1O
1O
OS
IF-Modul
LON-Modul
SSMSBM
L1 L2 L3
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
In1
1
DDG
2
GND +24V
3
Option IF-/LON-Modul
AUX
GND
10V/20mA
In2
H
Ext.off
L
MP
TERM MP
M25
M20
M16
M16
M12
NPT 3/4”
NPT 1/2”
NPT 1/4”
NPT 1/4”
M12x1.5
Fig. 3:

Fig. 4:
SSMSBMDDGMPExt.offAUX
10V /20mA
1
In1 GND
external supply
pressure sensor
min. 12 V DC / 10 mA
max. 250 V AC / 1 A
external value
10 V / 20 mA
external off (switch) external off (switch)
pump swamp (button)
In2 GNDLH +24V
23
SSMSBMDDGMPExt.offAUX
10V /20mA
1
In1 GND
In2 GNDLH +24V
23
L1 L2 L3
Single pump
MA Twin pump
max. 20 A RK5
SL Twin pump
L1 L2 L3

Fig. 5:
Fig. 6:
208,0 [mA] 0 2,0 3,0
2010,44 5,6 6,4
104,0 [V] 0 1,0 1,5
105,22 2,8 3,2
[1/min]
0
nmax
nmin
Δpmax
Δpmin
[%]
off
0
100
[%]
off
0
100
[ft]
0
[1/min]
0
nmax
nmin
Δpmax
Δpmin
[ft]
0
13 2
7
4
6
5

Fig. 7: Stratos GIGA
13
20
22
21
151617
1819
14
13
1211 10
9
87
4
3
2
1
6
5
20b
20a

en Installation and operating instructions 2
fr Notice de montage et de mise en service 66
es Instrucciones de instalación y funcionamiento 134

English
2WILO SE 06/2011
1 General notes ........................................................................................................................................3
2 Safety .....................................................................................................................................................3
2.1 Symbols and signal words used in these operating instructions .................................................................... 3
2.2 Qualified personnel ..............................................................................................................................................4
2.3 Risks incurred by failure to comply with the safety precautions ...................................................................4
2.4 Safety consciousness on the job ......................................................................................................................... 4
2.5 Safety precautions for the operator ...................................................................................................................4
2.6 Safety precautions for installation and maintenance work .............................................................................5
2.7 Unauthorized alteration and manufacture of spare parts ...............................................................................5
2.8 Improper use ......................................................................................................................................................... 5
3 Transport and interim storage ............................................................................................................5
3.1 Shipping ................................................................................................................................................................. 5
3.2 Transport for installation/dismantling purposes ..............................................................................................6
4 Intended use ..........................................................................................................................................7
5 Product information .............................................................................................................................8
5.1 Type key ................................................................................................................................................................ 8
5.2 Technical data ....................................................................................................................................................... 9
5.3 Scope of delivery ................................................................................................................................................10
5.4 Accessories ..........................................................................................................................................................10
6 Description and function ...................................................................................................................10
6.1 Description of the product ................................................................................................................................10
6.2 Control modes .....................................................................................................................................................13
6.3 Dual pump function/Y-pipe application ..........................................................................................................14
6.4 Other functions ...................................................................................................................................................18
7 Installation and electrical connection ..............................................................................................19
7.1 Permitted installations position and change of the arrangement of components
before the installation .......................................................................................................................................21
7.2 Installation ...........................................................................................................................................................23
7.3 Electrical connection ..........................................................................................................................................24
8 Operation ............................................................................................................................................29
8.1 Operating elements ............................................................................................................................................29
8.2 Display structure ................................................................................................................................................30
8.3 Explanation of standard symbols ......................................................................................................................30
8.4 Symbols in graphics/instructions ......................................................................................................................31
8.5 Display modes .....................................................................................................................................................31
8.6 Operating instructions .......................................................................................................................................34
8.7 Menu elements reference ..................................................................................................................................37
9 Commissioning ...................................................................................................................................44
9.1 Filling and bleeding .............................................................................................................................................44
9.2 Double pump installation/Y-pump installation ...............................................................................................46
9.3 Setting the pump output ...................................................................................................................................46
9.4 Setting the control mode ...................................................................................................................................47
10 Maintenance ........................................................................................................................................48
10.1 Air supply .............................................................................................................................................................50
10.2 Maintenance work ..............................................................................................................................................50
11 Faults, causes and remedies ..............................................................................................................57
11.1 Mechanical faults ................................................................................................................................................57
11.2 Error table ............................................................................................................................................................58
11.3 Acknowledging errors ........................................................................................................................................59
12 Spare parts ..........................................................................................................................................65
13 Disposal ...............................................................................................................................................65

English
Installation and operating instructions Wilo-Stratos GIGA 3
Installation and operating instructions
1 General notes
About this document These Installation and Operating Instructions form an integral part of
the product. They must be kept close to the product and in readiness
whenever required. Precise observance of these instructions is a pre-
condition for use of the product for the intended purpose and for its
correct operation.
These Installation and Operating Instructions conform to the relevant
version of the equipment and the underlying safety standards valid at
the time of going to press.
2Safety These instructions contain important information which must be fol-
lowed when installing and operating the pump. It is therefore imperative
that they be read by both the installer and the operator before the cir-
culator is installed or started up.
Both the general safety instructions in the ‘Safety precautions’ section
and those in subsequent sections indicated by danger symbols should
be carefully observed.
2.1 Symbols and signal words used in
these operating instructions
Symbols Symbols:
NOTE
Signal words Signal words:
General Safety symbol
Hazards from electrical causes
DANGER!
Imminently hazardous situation.
Will result in death or serious injury if not avoided.
WARNING!
The user can be exposed to (severe) injury. 'Warning' refers that
harm to the user when the user is neglecting the procedure.
CAUTION!
The product is at risk of damage. 'Caution' refers to the product
when the user is neglecting the procedures.

English
4WILO SE 06/2011
NOTE:
A notice with useful information for the user in relation to the prod-
uct. It attends the user to possible problems.
Information applied directly to the product, such as:
• direction of rotation arrow,
• identifiers for connections,
• name plate,
• and warning sticker,
must be strictly complied with and kept in legible condition.
2.2 Qualified Personnel The personnel installing the pump must have the appropriate qualifi-
cations for this work. Area of responsibility, terms of reference and
monitoring of the personnel are to be ensured by the operator. If the
personnel are not in possession of the necessary knowledge, they are
to be trained and instructed. This can be accomplished if necessary by
the manufacturer of the product at the request of the operator.
2.3 Risks incurred by failure to comply
with the safety precautions
Non-observance of the safety instructions can result in risk of injury
to persons and damage to the environment and the product/unit.
Non-observance of the safety instructions results in the loss of any
claims to damages.
In detail, non-observance can, for example, result in the following
risks:
• danger to persons from electrical, mechanical and bacteriological
influences,
• damage to the environment due to leakage of hazardous materials,
• damage to property,
• failure of important product/unit functions, failure of required main-
tenance and repair procedures.
2.4 Safety consciousness on the job The safety instructions included in these installation and operating
instructions, the existing national regulations for accident prevention
together with any internal working, operating and safety regulations
of the operator are to be complied with.
2.5 Safety precautions for the operator • This appliance is not intended for use by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of expe-
rience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible
for their safety.
• If hot or cold components on the product/the unit lead to hazards,
local measures must be taken to guard them against touching.
• Leakage (e.i. from a shaft seal) of hazardous (e.i. explosive, toxic or
hot) fluids must be discharged so that no danger to persons or to the
environment arises.
• National statutory provisions are to be complied with.
• Highly flammable materials are always to be kept at a safe distance
from the product.
• Danger from electrical current must be eliminated. National Electrical
Codes, local codes and regulations must be followed.

English
Installation and operating instructions Wilo-Stratos GIGA 5
2.6 Safety precautions for inspection
and installation
The operator must ensure that all inspection and installation work is
carried out by authorized and qualified specialists who have carefully
reviewed these instructions.
Work on the pump/unit must be carried out only with the pump dis-
connected (locked out) from the electrical supply and at complete
standstill. It is mandatory that the procedure described in the instal-
lation and operating instructions for shutting down the product/unit
be complied with.
Immediately on conclusion of the work, all safety and protective
devices must be put back in position and/or recommissioned.
2.7 Unauthorized alterations and
manufacture of spare parts
Unauthorised modification and manufacture of spare parts will impair
the safety of the product/personnel and will make void the manufac-
turer's declarations regarding safety.
Alterations to the product may only be carried out with the manufac-
turer's consent. The use of original spare parts and accessories autho-
rized by the manufacturer will ensure safety. The use of any other
parts may invalidate claims involving the liability of the manufacturer
for any consequences.
2.8 Improper use The operational safety of the supplied product can only be guaran-
teed if it is used in accordance with paragraph 4 of the operating
instructions. The limits given in the catalogue or data sheet must
under no circumstances be exceeded.
3 Transport and interim storage
3.1 Shipping The pump is delivered from the factory packaged in a cardboard box
or secured to a pallet and protected against dust and moisture.
Transport inspection When receiving the material, check that there has been no damage
during the transport. If shipping damage has occurred, take all neces-
sary steps with the carrier within the allowed time.
Storage Before installation, the pump must be kept dry, frost-free and pro-
tected from mechanical damage.
CAUTION! Risk of damage due to incorrect packaging!
If the pump is transported again at a later time, it must be packaged
so that it cannot be damaged during transport.
• Use the original packaging for this, or choose equivalent packag-
ing. Use the provided transport eyes for lifting.
• Check the transport eyes before use for damage and secure fixa-
tion.

English
6WILO SE 06/2011
3.2 Transport for installation/
dismantling purposes
WARNING! Risk of injuries to personnel!
Incorrect transport can cause injury to personnel.
• The pump must be transported using approved load-bearing equip-
ment (e.g. block and tackle, crane, etc.). These are to be attached to
the transport eyes at the motor flange (Fig. 8, shown here: lifting
direction with vertical motor shaft).
• If necessary, e.g. in case of repairs, the transport eyes can be moved
from the motor flange to the motor housing (see e.g. Fig. 9). Before
installing the transport eyes at the motor housing, unscrew the
spacers from the openings for the transport eyes (Fig. 7, Item 20b)
(see chapter 10.2.1 “Replacing the mechanical seal” on page 50).
• Before using the transporteyes, check the eyes for damage and ensure
that the fastening screws are completely screwed in and tightened.
• If the transport eyes have been moved from the motor flange and
installed at the motor housing, then they are only approved for car-
rying or transporting the motor impeller unit (Fig. 9) and not for
transport of the whole pump and not for separation of the motor
impeller unit from the pump housing.
• If the transport eyes are moved from the motor flange to the motor
housing, e.g. in case of repairs (see chapter 10 “Maintenance” on
page 48 ), then these are to be reattached to the motor flange after
completionoftheinstallationor maintenanceworkand the spacersare
to be screwed into the openings of the transport eyes (Fig. 7, Item 20a).
Fig. 8: Transporting the pump
Fig. 9: Transport of the motor impeller unit

English
Installation and operating instructions Wilo-Stratos GIGA 7
NOTE:
Swivel/turn the transport eyes to improve the balance in accordance
with the direction of lifting. To do this, loosen and then retighten the
fastening screws.
4Intendeduse
Purpose The glanded pumps of the Stratos GIGA series are intended for use as
circulation pumps in building services.
Fields of application They may be used for:
• Hot water heating systems
• Cooling and cold water circulation systems
• Industrial circulation systems
• Heat carrier circuits
Restrictions The pumps are exclusively intended for installation and operation in
enclosed rooms. Typical installation locations are technical rooms
within the building with other domestic installations. The following is
not permitted:
• Outdoor installation and operation outdoors
WARNING! Danger of personal injury!
Setting up the pump without securing it can lead to personal injury.
• Do not place the pump unsecured on the pump base. The base
with the threaded holes is only used for attachment. When stand-
ing freely, the pump might not be sufficiently stable.
DANGER! Danger of death!
The pump itself and the parts of pump can be extremely heavy.
Falling parts pose a risk of cuts, crush injuries, bruises or impacts,
which may lead to death.
• Always use suitable lifting equipment and secure parts against fall-
ing .
• Never stand underneath a suspended load.
• Make sure the pump is securely positioned and is stable during
storage and transport as well as prior to all installation and other
assembly work.
DANGER! Danger of death!
The permanently magnetized rotor inside the motor presents an
acute danger to persons with pacemakers. Non-observance
results in death or very serious injuries.
• Do not open the motor!
• Only allow Wilo customer service to dismantle and install the
rotor for maintenance and repair work.

English
8WILO SE 06/2011
5 Product information
5.1 Type key The type key consists of the following elements:
WARNING! Danger of personal injury!
Opening the motor leads to high, suddenly occurring magnetic
forces. These can cause serious cuts, crushing injuries and bruises.
• Do not open the motor!
• Only allow Wilo customer service to dismantle and install the
motor flange and the end shield for maintenance and repair work.
CAUTION! Danger of property damage!
Unpermitted substances in the fluid can destroy the pump.
Abrasive solids (e.g. sand) increase pump wear.
Pumps without an Ex certificate are not suitable for use in poten-
tially explosive areas.
• Intended use of the pump/installation also includes following
these instructions.
• Any use above and beyond these is regarded as incorrect use.
Example: Stratos GIGA 1.5/3-165
Stratos
GIGA
High-efficiency pump
Inline single pump
1.5 Pipe connection [inch]
[flanges acc. ASME Class 125]
3-165 Infinitely variable nominal pump head 3 to 165 [ft]

English
Installation and operating instructions Wilo-Stratos GIGA 9
5.2 Technical data
Please state all the information on the pump name plate when order-
ing spare parts.
Fluids If water/glycol mixtures are used (or fluids with a viscosity other than
that of pure water), an increase in power consumption of the pump is
to be taken into account. Only use mixtures with corrosion inhibitors.
The respective manufacturer's instructions are to be observed.
• The fluid must be free of sediments.
• Wilo's approval must be obtained for use of other media.
• Mixtures with a proportion of glycol of > 10% influence the Δp-v
pump curve and the flow calculation.
Property Value Remarks
Speed range 500 - 5130 rpm Depends on pump type
Nominal diameter of pipe connection 1.5/2/2.5 in
Pipe connections Flanges acc. ASME Class 125
Max. permissible liquid temperature range Water only:
from 32°F to 200°F [0°C to +90°C]
Water/glycol up to 50 %:
from -4°F to 250°F [-20°C to +120°C]
Max. permissible liquid temperature range
with high temperature seal
At 175 psi [12 bar]:
from -4°F to 250°F [-20°C to +120°C]
At 165 psi [11 bar]:
from -4°F to 285°F [-20°C to +140°C]
Ambient temperature min./max. 32°F to 104°F (0°C to +40°C)
Max. admissible operating pressure 232 psi (16 bar)
Insulation class F
Protection class Enclosure Type 5 Indoor Use Only Only for US market
IP55
Electromagnetic compatibility
Emitted interference in acc. with
Interference resistance in acc. with
EN 61800-3
EN 61800-3
Residential
Industrial
Sound pressure level1) < 74 dB(A) Depends on pump type
Approved fluids Heating water
Cooling/cold water
Water/glycol mixture up to 40% vol.
Other fluids
Standard version
Standard version
Standard version
Only for special version
Electrical connection 3~380 V AC to 480 V AC ±10%,
50/60 Hz
Supported network types:
Delta, wye networks
Internal electric circuit PELV, galvanically isolated Isolated Secondary Circuit,
Limited voltage/current cir-
cuit
Speed control Built-in frequency converter
Relative humidity
- at Tenvironment = 186°F (30°C)
- at Tenvironment = 104°F (40°C)
90%, non-condensing
60%, non-condensing
1) Average value of the sound-pressure level at a spatially rectangular measuring surface at a distance of 3.3 ft (1 m) from the pump surface in accordance
with ISO 3744

English
10 WILO SE 06/2011
NOTE:
The flow value shown on the IR-Monitor display or output to the
building management system must not be used to control the pump.
This value is merely an indicator of general trends.
A flow value is not an output on every type of pump.
NOTE:
Always read and follow the material safety data sheet for the fluid
being pumped!
5.3 Scope of delivery • Stratos GIGA pump
• Installation and operating instructions
5.4 Accessories Accessories must be ordered separately:
• Three mounting brackets with fixation elements for installation on a
base
• Installation aid for mechanical seal
•IR-Monitor
• IF-Module PLR for connecting to PLR/interface converter
• IF-Module LON for connection to the LONWORKS network
• BACnet IF-Module
• Modbus IF-Module
• CAN IF-Module
See catalogue for detailed list.
NOTE:
IF-Module may only be plugged in when the pump is deenergized
(voltage-free).
6Descriptionandfunction
6.1 Description of the product The Wilo-Stratos GIGA high-efficiency pumps are glanded pumps
with built-in power adjustment and “Electronic Commutated Motor”
(ECM) technology. The pumps are designed as single-stage low-
pressure centrifugal pumps with flange connection and mechanical
seal.
The pumps can be installed both directly as pipe installation pumps in
sufficiently secured pipes or be placed on a foundation base.
The pump housing is designed as an in-line construction; i.e. the suc-
tion and pressure-side flanges are on one axis. All pump housings are
provided with a pump base. Installation on a foundation base is
recommended.

English
Installation and operating instructions Wilo-Stratos GIGA 11
Main components Fig. 7 shows an exploded drawing of the pump with the main compo-
nents. In the following, the assembly of the pump is explained in
detail.
Arrangement of the main components in accordance with Fig.
7 and
Tab. 1:
Tab. 1: Arrangement of the main components
The typical characteristic of the Stratos GIGA series is the jacket cool-
ing of the motor. The air current is optimally conducted by the long
fan cover (Fig. 10, Item 1) for cooling the motor and the electronic
module.
(Fig. 10, Item 2) shows the pump housing with a special lantern chan-
nel to reduce the load of the impeller.
The transport eyes (Fig. 10, Item 3) are to be used in accordance with
chapters 3 and 10.
The window in the lantern that is covered with the protective plate
(Fig. 10, Item 4) is used for maintenance work in accordance with
chapter 10 “Maintenance” on page 48. The window can also be used
to check for leaks with consideration of the safety regulations in
accordance with chapter 9 “Commissioning” on page 44 and chapter
10 “Maintenance” on page 48.
No. Part
1Fastening screws of the fan cover
2Fan cover
3Motor impeller unit fastening screws
4Motor housing
5Differential pressure sensor (DDG)
6DDG holder
7Motor flange
8Motor shaft
9Lantern
10 Fastening screws of the lantern
11 O-ring
12 Rotating unit of the mechanical seal (mechanical seal)
13 Pressure measuring line
14 Pump housing
15 Impeller nut
16 Impeller
17 Counter ring of the mechanical seal
18 Protective plate
19 Bleed valve
20 Transport eye
20a Attachment points for transport eyes at the motor flange
20b Attachment points for transport eyes at the motor housing
21 Fastening screws of the electronic module
22 Electronic module
Fig. 10: Pump assembly
1
2
4
3

English
12 WILO SE 06/2011
Name plates The Wilo-Stratos GIGA has three name plates:
• The pump name plate (Fig. 11, Item 1) includes the serial number
(Ser.-No…/…), which is, for example, required for spare parts ordering.
• The electronic module name plate (electronic module = inverter or
frequency converter) (Fig. 11, Item 2) indicates the designation elec-
tronic module being used.
• The drive name plate is at the inverter on the side with the cable lead-
throughs (Fig. 12, Item 3). The electrical connection is to be made in
accordance with the specifications on the drive name plate.
Functional assemblies The pump has the following main functional assemblies:
• Hydraulic unit (Fig. 6 , Item 1), consisting of the pump housing, impel-
ler (Fig.
6 , Item 6) and lantern (Fig. 6 , Item 7)
• Optional differential pressure sensor (Fig. 6 , Item 2) with connecting
and fastening parts
• Drive (Fig. 6 , Item 3), consisting of EC motor (Fig. 6 , Item 4) and elec-
tronic module (Fig.
6 , Item 5).
The hydraulic unit is not a “ready-to-assemble” assembly due to the
motor shaft which goes through; it is taken apart for most mainte-
nance and repair work.
The hydraulic unit is driven by the EC motor (Fig.
6 , Item 4), which is
controlled from the electronic module (Fig.
6 , Item 5).
As far as the assembly is concerned, the impeller (Fig.
6 , Item 6) and
the lantern (Fig.
6 , Item 7) depend on the motor impeller unit (Fig. 13).
Fig. 11: Arrangement of the name plates:
Pump name plate, electronic module name
plate
1
2
Fig. 12: Arrangement of the name plates:
Drive name plate, electronic module name
plate
3
2

English
Installation and operating instructions Wilo-Stratos GIGA 13
For the following purposes, the motor impeller unit can be separated
from the pump housing (which can remain in the piping) (also see
chapter 10 “Maintenance” on page 48):
• To provide access to the inside parts (impeller and mechanical seal)
• To make it possible to separate the motor from the hydraulic unit.
When this is done, the transport eyes (Fig. 13, Item 2) are removed
from the motor flange (Fig. 13, Item 1), taken to the motor housing
and refastened there with the same screws to the motor housing
(Fig. 13, Item 3).
Electronic module The electronic module controls the speed of the pump to a setpoint
that can be adjusted within the control range.
The hydraulic output is controlled by differential pressure and the set
control mode. In all control modes, however, the pump adapts itself
continuously to the changing power requirements of the system,
which is the case especially when thermostatic valves or mixers are
used.
The basic advantages of the electronic control are:
• Energy saving at the same time as reduced operating costs
• Fewer differential pressure valves required
• Reduction of flow noise
• Adaptation of the pump to changing operating requirements
Legend (Fig. 14):
1 Control terminals
2 Attachment points cover
3 Power terminals (mains terminals)
4 Interface for IF-Module
5DIPswitch
6 Display
7 Infrared window
8 The red button
6.2 Control modes The selectable control modes are:
Δp-c:
The electronics keep the differential pressure created by the pump
above the permitted feed flow range constantly at the pre-selected
differential pressure setpoint Hsup to the maximum pump curve
(Fig. 15).
Q = Volume flow
H = Differential pressure (min./max.)
HS= Differential pressure setpoint
NOTE:
For further information about setting the control mode and the asso-
ciated parameters, see chapter 8 “Operation” on page 29 and
chapter 9.4 “Setting the control mode” on page 47.
Fig. 13: Motor impeller unit
132
Fig. 14: Electronic module
32
78 6 5 4
1
Fig. 15: Δp-c control
Q
s
H
max
H
H
s
H
min

English
14 WILO SE 06/2011
Δp-v:
The electronics linearly change the differential pressure setpoint to
be kept by the pump between the delivery heads Hsand ½ Hs. The
differential pressure setpoint Hsdecreases or increases with the
volume flow (Fig. 16).
Q = Volume flow
H = Differential pressure (min./max.)
HS= Differential pressure setpoint
NOTE:
For further information about setting the control mode and the asso-
ciated parameters, see chapter 8 “Operation” on page 29 and
chapter 9.4 “Setting the control mode” on page 47.
NOTE:
A differential pressure sensor is needed for the control modes that are
being performed (Δp-c and Δp-v) which sends the actual value to the
electronics.
Manual control mode:
The speed of the pump can be kept to a constant speed between nmin
and nmax (Fig. 17). “Manual control” mode deactivates all other con-
trol modes.
PID control:
If the aforementioned standard control modes cannot be used – e.g.
if other sensors are to be used or the distance to the pump is very
long – then the PID control (Proportional-Integral-Differential con-
trol) is available.
By selecting a good combination of individual control portions, the
operator can ensure fast reacting, constant control without lasting
setpoint deviations.
The output signal of the selected sensor can take any intermediate
value. The respective actual value reached (sensor signal) will be
shown as a percentage (100% = maximum measurement range of the
sensor) on the status page of the menu.
NOTE:
The displayed percentage value only corresponds indirectly to the cur-
rent delivery head of the pump(s). It can be, for example, that the maxi-
mum delivery head has already been reached at a sensor signal < 100%.
For further information about setting the control mode and the asso-
ciated parameters, see chapter 8 “Operation” on page 29 and
chapter 9.4 “Setting the control mode” on page 47.
6.3 Dual pump function/Y-pipe
application
NOTE:
The properties described below are only available if the internal
MP interface (MP = Multi Pump) is used.
• Both pumps are controlled by the master pump.
If one of the pumps malfunctions, the other will run according to the
master's control settings. In case of a total failure of the master, the
slave pump operates at emergency operation speed.
Fig. 16: Δp-v control
Q
H
H
Q
H
max
H
s
½ H
s
H
min
Fig. 17: Manual control mode
Q
H
H
Q
nmin
nmax
s
Hs