ICMA S167 Owner's manual

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
FI.S167.EN.C - 03/2023
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected]
1
INSTALLATION AND OPERATION INSTRUCTIONS

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
FI.S167.EN.C - 03/2023
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected]
2
INDEX
IMPORTANT SAFETY AND INSTALLATION INSTRUCTIONS...................................................................................................3
1. SYMBOL DESCRITPION.............................................................................................................................................................4
2. OVERVIEW....................................................................................................................................................................................4
2.1 Advantages of installation of the pump..........................................................................................................................4
3. SERVICE CONDITIONS...............................................................................................................................................................5
3.1 Ambient Temperature............................................................................................................................................................5
3.2 Relative humidity (RH)..........................................................................................................................................................5
3.3 Media (conveying liquid) temperature...............................................................................................................................5
3.4 System Pressure......................................................................................................................................................................5
3.5 Protection Level......................................................................................................................................................................5
3.6 Inlet Pressure...........................................................................................................................................................................5
3.7 Pumping Liquid........................................................................................................................................................................5
4. INSTALLATION.............................................................................................................................................................................6
4.1 Position of Junction Box.......................................................................................................................................................6
4.2 Thermal insulation of the pump body...............................................................................................................................8
5. ELECTRICAL CONNECTION......................................................................................................................................................9
6. CONTROLS ON CONTROL PANEL..........................................................................................................................................11
6.1 Fault code display status....................................................................................................................................................11
6.2 Light area displaying the settings of the pump.............................................................................................................12
6.3Buttonforselectingthepumpsettings............................................................................................................................12
7. SETTING OF THE PUMP...........................................................................................................................................................12
7.1 The control on the pump..................................................................................................................................................13
8. PWM SIGNAL CONTROL MODE............................................................................................................................................14
8.1 Control and Signal................................................................................................................................................................14
8.2 Interface..................................................................................................................................................................................14
8.3 PWM Input Signal..................................................................................................................................................................15
8.4 PWM Feedback Signal.........................................................................................................................................................16
8.5 How to use the signals........................................................................................................................................................16
9. USE OF BYPASS VALVE............................................................................................................................................................17
9.1 Manually-operated bypass valve.......................................................................................................................................18
9.2 Automatic bypass valve (temperature control type).................................................................................................18
10. START UP.....................................................................................................................................................................................18
10.1 Before Start Up...................................................................................................................................................................18
10.2 Exhaust the Motor Pump.................................................................................................................................................18
10.3 Gas-exhausting of heating system.................................................................................................................................18
11. SETTINGS AND PERFORMANCE OF PUMP.......................................................................................................................19
11.1 Relationship between pump settings and its performance...................................................................................19
12. PERFORMANCE CURVE...........................................................................................................................................................20
12.1 Performance curve guide.................................................................................................................................................20
12.2 Curve conditions.................................................................................................................................................................20
12.3 Performance Curve............................................................................................................................................................20
13. CHARACTERISTICS...................................................................................................................................................................21
13.1 Description of nameplate................................................................................................................................................21
13.2 Model explanation.............................................................................................................................................................22
14. TECHNICAL PARAMETERS AND INSTALLATION DIMENSIONS...................................................................................23
14.1 Technical data......................................................................................................................................................................23
14.2 Installation Dimensions....................................................................................................................................................24
15. FAULT CHECKLIST.....................................................................................................................................................................25

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
FI.S167.EN.C - 03/2023
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected] Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected]
2 3
IMPORTANT SAFETY AND INSTALLATION INSTRUCTIONS
1. The installation manual should be read carefully before installation and use.
2. Any failure to comply with the content marked by safety warning marks may cause personal injury, pump damage,
and other property loss, for which, the manufacturer shall not assume any responsibility and compensation.
3. The installer operator and user must comply with the local safety regulations.
4. The user must confirm that installation and maintenance of the product should be conducted by sta proficient
in the instructions and having professional qualification certificates.
5. Pumps must not be installed in a damp environment or places that may be splashed by water.
6. In order to facilitate maintenance, a one-stop valve should be installed on each side of the pump inlet and outlet
respectively.
7. The power supply of the pump should be cut o during installation and maintenance.
8. A pump with a copper or stainless steel body should be adopted to domestic the hot water circulation.
9. The heat feed pipeline should not be supplemented with non-softened water frequently to avoid an increase in
the calcium in the circulating water of the pipeline so as not to clog impellers.
10. It is prohibited to start the pump when there is no pumping liquid.
11. Some models can not be used for diet water.
12. Pumping liquid may be of high temperature and pressure, therefore, liquid in the system should be drained o,
or stop valves on both sides of the pump must be switched o to avoid burns before moving and removing the
pump.
13. In the summer or when the ambient temperature is high, attention should be paid to ventilation so as to prevent
moisture condensation and cause electrical faults.
14. In the winter, if the pump system does not operate or when the ambient temperature is below 0°C, liquid in the
pipeline system should be emptied to avoid causing frost crack to the pump body.
15. If the pump does not use for a long time, please turn o the conduit valves on the pump inlet and outlet ends
and cut o the power of the pump.
16. If the flexible cable is damaged, please connect the service center to have it replaced together with the connector.
17. If it is found that the motor is burning hot and abnormal, immediately turn o the valve on the pump inlet end
and cut o the pump power, besides, immediately contact your local dealer or service center.
18. If the pump failure can not be cleared in accordance with the description in the instructions, immediately turn
o the valve on the pump inlet end and cut o the pump power, besides, immediately contact your local dealer
or service center
19. The product should be placed out of the reach of children, and after installation, isolation measures should be
taken to prevent children from touching it.
20. The product should be placed in a dry, ventilated, and cool place and stored at room temperature.
21. This appliance can be used by children aged 8 years and above and persons with reduced physical, sensory or
mental capabilities or lack of experience and knowledge if they have been given supervision or instruction
concerning the use of the appliance in a safe way and understand the hazards involved. Children shall not play
with the appliance. Cleaning and user maintenance shall not be made by children without supervision.
Warning
Before starting installation, the Installation and Operating Instructions of device
must be read carefully. Installation and use of the device must comply with local
regulations and follow good operation specification.
Warning
Personnel with physical decline, dysesthesia, or poor mental ability and lacking of
experience and relevant knowledge (including children) should use the pump under
the supervision and guidance of people who can take charge of their safety.

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
FI.S167.EN.C - 03/2023
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected]
4
1. SYMBOL DESCRITPION
2. OVERVIEW
Prior to installation, read this installation and operating instructions. The installation and operation should also be in
accordance with national regulations and accepted codes of good practice.
The pump is most suitable for the following uses:
• Stable heating system with a variable flow
• Heating system with variable pipeline temperature
• Industrial circulation system
• Home heating and domestic water supply system
The pump is equipped with a permanent magnet motor and dierential pressure controller which can adjust the
performance of the electric pump automatically and continuously to meet the actual needs of the system.
The pump is equipped with the control panel on the front, which is convenient for the operation of users.
Easy installation and start-up
• The pump has auto adaptation mode AUTO (factory settings). In most cases, you can
start the pump without need to make any adjustments and automatically adjust it to
meet the actual needs of the system.
• High comfort
• The running noise of the pump and the whole system is low.
• Low energy consumption
• Compared with the conventional circulating pump, its energy consumption is very
low. The minimum energy consumption of the pump can reach 5W.
Warning
Failure to comply with this security declaration will likely result in personal injury!
Failure to comply with this security declaration will likely cause failure or damage
to the equipment!
Notes or instructions facilitating the work and ensuring operational safety.
CAUTION
NOTE
GPA III series circulating pump(also called abbreviation of “pump”) is mainly used for water circulation in
home heating and domestic hot water system.
2.1 Advantages of installation of the pump
A
B
C
D
E
F
G
A

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
FI.S167.EN.C - 03/2023
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected] Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected]
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3. SERVICE CONDITIONS
3.1 Ambient Temperature
Ambient temperature: 0°C ~ +70°C
3.2 Relative humidity (RH)
Max. humidity: 95%
3.3 Media (conveying liquid) temperature
The temperature of liquid conveying +2°C ~ 110°C.
To prevent the control box and stator from appearing condensate water, the temperature of the pump conveying
liquid must be always higher than the ambient temperature.
3.4 System Pressure
The maximum is 1.0 MPa (10 bar).
3.5 Protection Level
IP 44
3.6 Inlet Pressure
To avoid damage to the pump bearing caused by cavitation noise, the following minimum pressure should be main-
tained in the pump inlet:
3.7 Pumping Liquid
The thin, clean, non-corrosive, and non-explosive liquid does not contain any solid particles, bers, or mineral oil;
the pump should not be absolutely used for conveying ammable liquid such as vegetable oil and gasoline. If the
circulating pump is used in case of high viscosity, the pump performance will reduce, therefore, when selecting a
pump, the viscosity of liquid must be considered.
Liquid temperature <75°C 90°C 110°C
Inlet Pressure
0.05bar 0.5bar 1.08bar
0.5m head 5m head 10.8m head

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
FI.S167.EN.C - 03/2023
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected]
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4. INSTALLATION
• Install the pump, arrows on the pump housing indicate the direction of liquid owing through the pump body.
• When the pump is installed on the pipeline, its inlet and outlet must be installed with two leather packings
provided.
• During installation, the pump shaft must be in the horizontal position.
4.1 Position of Junction Box

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
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The junction box can rotate at 90°.To change the position of the junction box, follow the operating steps below:
1. Switch the valves of the inlet and outlet and conduct decompression;
2. Loosen and remove the four socket head cap screws that x the pump body;
3. Rotate the motor to the desired position and match the four screw holes;
4. Put the four socket head cap screws back and tighten them in the cross-direction order;
5. Open the valve of the inlet and outlet.
Warning
Pumping liquid may be at high temperature and pressure, therefore, liquid
in the system should be drained o or valves on both sides of the pump
must be switched o before removing socket head cap screws.
Change the position of the junction box, the pump should not be started
until the system has been lled with pumping liquid or valves on both sides
of the pump are open.
CAUTION

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
FI.S167.EN.C - 03/2023
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected]
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4.2 Thermal insulation of the pump body
CAUTION
NOTE
Restrict the thermal losses of the pump body and pipeline. Conduct
thermal insulation for the pump body and pipeline so as to reduce the
thermal losses of the pump and pipeline.
Isolating or covering junction box and control panel is not allowed

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
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5. ELECTRICAL CONNECTION

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
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• The pump does not need external motor protection.
• Check whether the voltage of the power supply and frequency match with the parameters marked by pump
nameplate.
• Use the pump-associated plug to connect power supply.
• If the indicator lamp on the control panel lights, it indicates that the power supply is switched on.
Electrical connection and protection should be
carried out in accordance with local regulations.
Warning
The pump must be connected to an earth wire
The pump must be connected to an external power switch;
the minimum gap between all the electrodes is 3mm.

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
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6. CONTROLS ON CONTROL PANEL
6.1 Fault code display status
NO. Explanation
1 The pump I,II,III gear display
2The pump automatic gearshift display (AUTO)
3 The pump PWM gear display
4 The pump gear shifting button
Fault code Fault description
Gear light 1 flickers Over-voltage protection, restart after voltage returns to normal (low voltage
protection value 270 +5V)
Gear light 2 flickers Under-voltage protection, restart after voltage returns to normal (low-voltage
protection value 165 + 5V)
Gear light 3 flickers Over-current protection, restart after 5S
Gear light 4 flickers Under-load protection, restart after 5S
Gear light 5 flickers Over-Phase protection, restart after 5S
Gear light 1+2 flickers Locked-rotor protection, restart after 5S
Gear light 1+3 flickers Start failure (asymmetric motor parameters), restart after 5S
Gear light 1+4 flickers Over-heat protection, power reduced to half of the maximum power, ambient
temperature restored to the range of use, power restored to the maximum.
Gear light 1+5 flickers Over-temperature protection, restart after environment temperature restores to
5S in use range
Special note:
1. If I and II display at the same time means BL1. If I and III display at the same time means BL2. If I and Auto display
at the same time means BL3.
2. If II and III display at the same time means HD1. If II and Auto display at the same time means HD2. If II and P
display at the same time means HD3.
After the power is turned on, the position 6 light area displays the status. During operation, the gear display light is
on constantly. When the electric pump can not operate properly, the gear display light will ash continuously, the
corresponding faults are as shown below:

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
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6.2 Light area displaying the settings of the pump
6.3 Button for selecting the pump settings
The pump has 9 kinds of settings, which can be selected by buttons.
The setting of the pump is indicated by the light lit of 10 locations:
By pressing the button once at 2 seconds interval, the pump setting mode will change once.
A cycle is constituted of every nine presses on the button. For details, please refer to Section 6.2.
Factory settings=AUTO (auto adaptation mode)
Recommended and available settings of pump
Key position Number of times of key Fixed light area Explanation
4
0AUTO Auto adaptation
1-2-3 BL1/BL2/BL3 Proportional pressure curve
4-5-6 HD1/HD2/HD3 Constant pressure curve
7-8-9 HS1/HS2/HS3 Constant speed curve
7. SETTING OF THE PUMP
The pump should be set according to system type

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
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7.1 The control on the pump
During the operation of the pump, control it according to “proportional pressure control” (BL) principle or “constant
pressure control” (HD) principle.
In these two control modes, the performance of the pump and corresponding power consumption should be adjusted
according to the heat demand of the system.
7.1.1 Proportional pressure control
In this control mode, the pressure dierence on both ends of the pump shall be controlled by the ow. Proportional
pressure curve in Q / H diagram is represented by BL1/BL2 /BL3 (Section 11).
7.1.2 Constant pressure control
In this control mode, the pressure dierence on both ends of the pump remains constant, having nothing to do with
ow. In Q/H gure, constant pressure curve is a level performance curve, represented by HD1/HD2 (Section 11).
Position System Type
Settings of the pump
Optimal settings Or other optional settings
A Floor heating system AUTO HS3
B Dual pipeline heating system AUTO BL3
C Single pipeline heating system AUTO HS3
• AUTO (auto adaptation) mode shall adjust the pump performance automatically according to the actual heat
demand of the system. Since performance is adjusted gradually, it is recommended that leave it in the AUTO (auto
adaptation) mode for at least a week before changing the settings of the pump.
• If you choose to change back to AUTO (auto adaptation) mode, the pump can remember the set points of its
previous AUTO mode and continue to adjust the performance automatically.
• Pump settings change from optimal settings to other optional settings, heating system is a slow system, it is
impossible to achieve optimal operation mode within several minutes or hours. If the optimal settings of the pump
fail to achieve ideal heat distribution for each room, you should change the pump settings to other settings.
• For the relationship between pump settings and performance curve, please see Section 11.

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
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Code Description
T Cycle
d Duty Cycle
UiH Input High Voltage
UiL Input Low Voltage
IiH Input Current
The pump is controlled by external electrical elements
and components through interfaces. The interfaces
convert external signals into signals that can be
recognized by the microprocessor in the pump. In
addition, when the pump is supplied with 230V
voltage, the interfaces can ensure that users will
not be at risk of high-voltage electric shock when
contacting the signal cable.
8.2 Interface
NOTE
“Signal Ref” is a reference
earthing, and it is not
connected to protective
earthing.
1. Control Principle
The pump is controlled by modulated LV PWM (Pulse Width Modulation) digital signal, which means that the
variance of velocity depends on the external input signal. The variance of velocity is one of the functions of input
control.
2. Digital LV PWM (Pulse Width Modulation) Signal Design frequency scope of square wave PWM signal:
40Hz~4000Hz; PWM input signal (PWM IN) is used to give velocity commands, and adjusts the velocity commands
through adjusting PWM duty cycle. PWM output signal (PWM OUT) is the feedback signal of the pump, and the
PWM frequency is xed at 75Hz.
Duty Cycle (d%)
d%=t/T
For example:
T = 2 ms (500Hz)
t = 0.6 ms
d%=100×0.6/2=30%
UiH = 4~24V
UiL ≤ 1V
IiH ≤ 10mA
8. PWM SIGNAL CONTROL MODE
8.1 Control and Signal

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
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PWM Input Signal (%) Pump Status
0The pump switches to non-PWM mode (normal mode), and the default
system will have no PWM signal input.
<10 The pump runs at the highest velocity
10~84 The pump curve will drop from the highest to the lowest
85~91 The pump runs at the lowest velocity
91~95
If the velocity variance point of input signal fluctuates, then it will block
the start and stop of the pump according to the principle of magnetic
hysteresis
96~99 Stand-by, the pump stops
100 The pump switches to non-PWM mode (normal mode), and the default
system will have no PWM signal input.
• In the area of high duty-cycle PWM signal, when the input signal uctuates in the critical point, there will be a delay
area to prevent frequent stops and start of the pump.
• In area of low duty-cycle PWM signal, the pump runs at high velocity for the sake of system safety. For instance, when
the signal cable of gas boiler system is damaged, the pump will continue to run at the maximum rotational speed
and transfer heat through the main heat exchanger. This is also applicable to the heat pump, ensuring continuous
heat transfer in the case of signal cable of the pump is damaged and system safety is guaranteed. ·When PWM input
signal is 0% or 100%, the pump will switch to non-PWM mode (normal mode), and the default system will have no
PWM signal input.
8.3 PWM Input Signal
NOTE This system is adaptive to the automatic switching of PWM and non-PWM mode.
When there is PWM signal input, the system will enter PWM mode.

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
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PWM feedback signal can provide operation status of the pump, such as power loss or all kinds of alarm/warning
modes.
PWM feedback signal will feed back exclusive alarming information. If the power voltage detects under-voltage signal
values, its output signal will be set to 75%. Provided sundries settlement exists in the hydraulic system and causes
rotor being blocked, the duty cycle of output signal is set to 90%, the alarm will be given higher priority.
The signal can be used to measure power consumption of the pump. The pump signal can be used to detect the
actual operating point of the system rather than measuring by the current controlled by the system. The signal is also
applicable to comparing velocity setting value and feedback.
8.4 PWM Feedback Signal
8.5 How to use the signals
PWM Output Signal
(%) Pump Status Description
95 Standby (stop) The pump stops
90 Alarm stops, malfunctions (pump
blocked)
The pump does not work and will restarts only
after trouble is addressed
85 Alarm stops, electrical
malfunction/trouble
The pump does not work and will restarts only
after trouble is addressed
75 Warning
The pump runs, trouble has been detected under
this situation but it is not critical, and the pump
can still work.
0-70 0-70W (slope 1 W/% PWM)

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
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Bypass valve
The role of bypass valve is: when all the valves in the oor heating circuit or the radiator control valve temperature are
closed, it can be ensured that the heat from the boiler will be assigned.
Elements in the system:
• Bypass valve
• Flowmeter, position L.
The minimum ow must be ensured when all valves are closed.
The pump settings depend on the type of bypass valve it is equipped with, i.e. manually-operated bypass valve or
temperature-controlled bypass valve.
9. USE OF BYPASS VALVE

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9.1 Manually-operated bypass valve
9.2 Automatic bypass valve (temperature control type)
Follow the following steps:
1. When adjusting the bypass valve, the pump should be in setting HS1 (constant speed gear I mode). The minimum
ow of the system (Q min) must always be ensured. See the manual of bypass valve manufacturer.
2. When the bypass valve has been adjusted, set the pump referring to Section 11 Pump Setting.
Follow the following steps:
1. When adjusting the bypass valve, the pump should be in setting HS1 (constant speed gear I mode).
2. The minimum ow of the system (Q min) must always be ensured. See the manual of bypass valve manufacturer.
3. When the bypass valve has been adjusted, set the pump to the constant pressure mode. For the relationship
between pump settings and performance curve, please see Section 11. Settings and Performance of Pump.
Before starting the pump, make sure that the system is lled with liquid, and gas has been vented, and the pump inlet
pressure must achieve the minimum inlet pressure as required (see Chapter 3).
The pump has an automatic gas-exhausting function. There is no need
for gas-exhausting before startup. Gas in the pump may cause noise.
The noise will disappear after putting it into operation for a few minutes.
Set the pump to HS3 mode in a short time according to the size and
structure of the system, then gas in the pump will be vented quickly.
After gas exhausting of pump, that is, after the noise disappears, set
the pump according to the recommended instructions. Please refer to
Chapter 7
10. START UP
10.1 Before Start Up
10.2 Exhaust the Motor Pump
10.3 Gas-exhausting of heating system
CAUTION The pump should not operate
without water

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
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11. SETTINGS AND PERFORMANCE OF PUMP
11.1 Relationship between pump settings and its performance
Setting Pump Characteristics
Curve Functions
AUTO (factory
settings)
Highest to Lowest
Proportional Pressure
Curve
“Autoadaptation” function will automatically control the pump
performance within the specified range.
·Adjust the performance of the pump according to the size of the
system;
· Adjust the performance of the pump according to the load change
over a period of time;
In the “Autoadaptation” mode, the pump is set to proportional
pressure control mode.
BL (1-3) Proportional Pressure
Curve
The pump working point will move up and down on the proportional
pressure curve according to the flow needs of the system, when
the flow demand reduces, the pump pressure supply will drop while
when the flow demand increases, it will rise.
HD (1-3) Constant Pressure
Curve
The pump working point will move back and forth on the constant
pressure curve according to the flow needs of the system. The
pressure supply of the pump remains constant, having nothing to do
with the flow demand.
HS (1-3) Constant speed curve
Run on the constant curve at a constant speed. In speed HS (1-
3) mode, the pump is set to run on the maximum curve under all
working conditions. Set the pump to HS3 mode in a short time, then
gas in the pump will be vented quickly.

ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
FI.S167.EN.C - 03/2023
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: [phone] - www.icmaspa.it - [email protected]
20
12. PERFORMANCE CURVE
12.1 Performance curve guide
12.2 Curve conditions
12.3 Performance Curve
Each setting of the pump will have a corresponding performance curve (Q/H curve). While AUTO auto adaptation mode
covers a performance range. Input power curve (P1 curve) belongs to each Q/H curve. Power curve represents the
power consumption (P1) of the pump in watts on the given Q/H curve.
The following description applies to the performance curves in GPA III series manual:
• Testing liquid: gas-free water.
• The applicable density of curve ρ = 983.2 kg/cubic meter, and the liquid temperature is +6°C.
• All the values expressed by curves are averages, they can not be taken as guaranteed curves. If a particular
performance is required, measurement must be conducted separately. Applicable kinematic viscosity of curve μ =
0.474 mm ² / s (0.474CcST)